12 December 2023
Maiden Feldspar Mineral Resource Estimate
15.7Mt at 40.2% Feldspar
Ewoyaa Lithium Project, Ghana
Atlantic Lithium Limited (AIM: ALL, ASX: A11, OTCQX: ALLIF, "Atlantic Lithium" or the "Company"), the African-focused lithium exploration and development company targeting to deliver Ghana's first lithium mine, is pleased to announce a maiden JORC (2012) compliant Mineral Resource Estimate of 15.7Mt at 40.2% feldspar ("Feldspar MRE") for the Company's flagship Ewoyaa Lithium Project ("Ewoyaa Project" or the "Project") in Ghana, West Africa.
Highlights
- Maiden 15.7Mt at 40.2% Feldspar Mineral Resource Estimate reported for the Ewoyaa Lithium Project, including 13.7Mt (87%) in the Measured and Indicated categories.
- The Feldspar MRE is confined to the Ewoyaa Main, Ewoyaa Northeast, Ewoyaa South-1 and Ewoyaa South-2 deposits, which constitute approximately the first five years of planned spodumene concentrate production at the Project, as indicated by the Ewoyaa Definitive Feasibility Study ("DFS", refer announcement of 29 June 2023).
- The Feldspar MRE is based on the same geological model that resulted in the 35.3Mt at 1.25% Li2O MRE1 for the Project ("MRE" or "Resource"; refer announcement of 1 February 2023) and includes 31.1% quartz and 11.7% muscovite, as additional potential by-products of spodumene concentrate production at Ewoyaa.
- Maiden Feldspar MRE enables the potential inclusion of feldspar by-product credits in future revisions of the Ewoyaa feasibility studies, believed to drive down operating costs and further enhance the value of the Project.
- Feldspar is widely used in the ceramics industry; the Company believes Ewoyaa could become a major producer of domestic feldspar in Ghana, which Atlantic Lithium intends to supply into the local Ghanaian ceramics market.
- Metallurgical test work and ceramic application trials undertaken; ceramic trials successfully produced acceptable, industry-standard ware, comparable in all aspects, including contraction, water absorption, density, porosity, shape, colour and appearance.
- Further Feldspar MRE growth targeted through the inclusion of analysis of historic drilling samples across remaining pegmatite deposits and new drilling currently underway.
- Maiden Feldspar MRE will be incorporated into the ongoing Feldspar Definitive Feasibility Study ("Feldspar Study") being undertaken to assess the viability and prospective market conditions for the production of feldspar at Ewoyaa (refer announcement of 15 August 2023); with results due in Q1 2024.
Commenting, Neil Herbert, Executive Chairman of Atlantic Lithium, said:
"Identified early on by the Company as a by-product of spodumene concentrate production at Ewoyaa, the definition of the maiden Feldspar MRE now confirms the Project's potential as a major source of domestic feldspar in Ghana, capable of delivering industry-standard saleable ware.
"Currently supplied only by small-scale mining operations, we intend to supply the feldspar into the local Ghanian ceramics market. The Feldspar MRE indicates Ewoyaa's potential to meet and even surpass Ghana's demand requirements, further demonstrating the significant contribution the Project is expected to bring to Ghana.
"The Feldspar MRE is based on the same geological model that delivered the 35.3Mt MRE for the Project, as announced in February 2023, and incorporates approximately the first five years mine schedule, as outlined in the DFS. With 87% of the resource in the higher confidence Measured and Indicated categories, the Feldspar MRE represents a further significant de-risking and potentially value-enhancing milestone for the Project as we move closer towards construction.
"Currently, the economic outcomes indicated by the Definitive Feasibility Study for the Project do not consider the production of feldspar at Ewoyaa. The definition of the Feldspar MRE, therefore, enables the inclusion of feldspar by-product credits in future revisions of the Project's economics, offering the potential to further enhance the already impressive financial outcomes expected to be delivered at Ewoyaa.
"With only the first approximate five years of planned lithium production included in the Feldspar MRE, there is significant potential to further grow the resource. The Feldspar MRE will then be incorporated into the ongoing Feldspar Study which is evaluating the prospective market conditions and viability of producing feldspar at the Project. Results of the Feldspar Study are expected in Q1 2024.
"Initial feldspar quality test work has delivered good quality vitreous hotelware, high-end earthenware and floor tiles and successfully substituted industry accepted feldspar in trial firings. The results of the trials are very encouraging for the manufacture of saleable feldspar products.
"We look forward to delivering the results of the Feldspar Study in Q1 2024 and, later in the year, a revised feldspar resource estimate considering the life of the mine. These represent, respectively, just two of the major milestones in our sights in 2024 before we break ground at Ewoyaa."
Maiden Feldspar Mineral Resource Estimate
The Company reports a maiden Mineral Resource Estimate of 15.7Mt at 40.2% feldspar ("Feldspar MRE") confined to the Ewoyaa Main, Ewoyaa Northeast, Ewoyaa South-1 and Ewoyaa South-2 deposits, which represent approximately the first five years of planned production from the Ewoyaa Lithium Project, as detailed in the Ewoyaa Definitive Feasibility Study ("DFS") (refer announcement of 29 June 2023).
The Feldspar MRE is based on the same geological model that resulted in the 35.3Mt @ 1.25% Li2O Mineral Resource Estimate1 for the Project ("MRE" or "Resource"), as announced by the Company on 1 February 2023.
The Feldspar MRE will be incorporated into the feldspar Definitive Feasibility Study ("Feldspar Study"), undertaken by the Company to investigate the economic impact of producing additional feldspar by-products from the mining of lithium ore at the Project (refer announcement of 15 August 2023).
The Feldspar MRE includes a total of 3.5Mt at 39.7% feldspar in the Measured category, 10.2Mt at 40.5% feldspar in the Indicated category and 2Mt at 40.1% feldspar in the Inferred category. In addition to the feldspar, further by-products of quartz and muscovite were estimated and included (refer Table 1).
The independent Feldspar MRE was completed by Ashmore Advisory Pty Ltd ("Ashmore") of Perth, Western Australia, with results tabulated in the Statement of Mineral Resources in Table 1. The Statement of Mineral Resources is reported in line with requirements of the JORC Code (2012) and is therefore suitable for public reporting.
To undertake the estimation, the Company engaged Telemark Geosciences Ltd ("Telemark") to conduct normative mineralogy calculations on pegmatite samples obtained from historic drilling within the Resource area, in addition to new drilling undertaken and reported to date from the 2023 drilling programme.
The Ewoyaa pegmatites, which make up the Project's deposits, contain relatively consistent amounts of spodumene (within the mineralised zones), quartz, albite, potassic feldspar ("k-feldspar") and muscovite mica, along with numerous accessory minerals in relatively minor amounts. Normative mineralogy was calculated from total fusion X-ray fluorescence ("XRF") major element data using a least squares method. The normative calculations were validated against and corrected where necessary using X-ray diffraction ("XRD") Reitveld semi-quantitative mineralogical data from 65 sample pulps selected to represent a range of chemical compositions and mineralogy.
High-level Whittle optimisation, completed by Mining Focus Consultants Pty Ltd of Perth, Western Australia, demonstrates reasonable prospects for eventual economic extraction on the basis of the lithium Project (refer announcement of 29 June 2023).
Table 1: Ewoyaa Lithium Project Feldspar Mineral Resource Estimate (0.5% Li2O Cut-off)
|
|
Measured Mineral Resource |
|
|||||||||||
Deposit |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|
|||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
|
||||||
Ewoyaa Main |
3.5 |
39.7 |
1.37 |
31.8 |
1.10 |
11.5 |
0.40 |
|
||||||
Total |
3.5* |
39.7 |
1.37 |
31.8 |
1.10 |
11.5 |
0.40 |
|
||||||
|
|
|
|
|
|
|
|
|||||||
|
|
Indicated Mineral Resource |
|
|||||||||||
Deposit |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|
|||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
|
||||||
Ewoyaa Main |
6.5 |
40.8 |
2.66 |
31.6 |
2.06 |
11.9 |
0.78 |
|
||||||
Ewoyaa Northeast |
3.1 |
39.4 |
1.23 |
29.6 |
0.93 |
11.1 |
0.35 |
|
||||||
Ewoyaa South 1 |
0.4 |
42.1 |
0.16 |
29.3 |
0.11 |
11.7 |
0.04 |
|
||||||
Ewoyaa South 2 |
0.2 |
41.9 |
0.07 |
25.2 |
0.04 |
13.0 |
0.02 |
|
||||||
Total |
10.2* |
40.5 |
4.13 |
30.8 |
3.14 |
11.7 |
1.19 |
|
||||||
|
|
|
|
|
|
|
|
|||||||
|
|
Inferred Mineral Resource |
|
|||||||||||
Deposit |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|
|||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
|
||||||
Ewoyaa Main |
0.6 |
41.8 |
0.23 |
30.6 |
0.17 |
11.5 |
0.06 |
|
||||||
Ewoyaa Northeast |
0.4 |
39.5 |
0.15 |
30.5 |
0.11 |
13.0 |
0.05 |
|
||||||
Ewoyaa South 1 |
0.4 |
40.4 |
0.16 |
32.6 |
0.13 |
12.8 |
0.05 |
|
||||||
Ewoyaa South 2 |
0.7 |
38.8 |
0.27 |
31.7 |
0.22 |
12.6 |
0.09 |
|
||||||
Total |
2.0* |
40.1 |
0.81 |
31.4 |
0.63 |
12.4 |
0.25 |
|
||||||
|
|
|
|
|
|
|
|
|
||||||
|
|
Total Mineral Resource |
|
|||||||||||
Deposit |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|
|||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
|
||||||
Ewoyaa Main |
10.5 |
40.5 |
4.27 |
31.6 |
3.33 |
11.7 |
1.24 |
|
||||||
Ewoyaa Northeast |
3.5 |
39.4 |
1.38 |
29.7 |
1.04 |
11.3 |
0.40 |
|
||||||
Ewoyaa South 1 |
0.8 |
41.3 |
0.32 |
31.0 |
0.24 |
12.2 |
0.09 |
|
||||||
Ewoyaa South 2 |
0.9 |
39.4 |
0.35 |
30.4 |
0.27 |
12.7 |
0.11 |
|
||||||
Total |
15.7* |
40.2 |
6.31 |
31.1 |
4.87 |
11.7 |
1.84 |
|
||||||
NOTE: Based on the lithium Mineral Resource Estimate1 reported for the Project in February 2023 and confined to the Ewoyaa Main, Ewoyaa Northeast, Ewoyaa South-1 and Ewoyaa South-2 deposits. Total tonnage figures do not include tonnage of spodumene as indicated in the February 2023 Mineral Resource Estimate1 for the Project, nor minor accessory minerals.
The Feldspar MRE has been compiled under the supervision of Mr. Shaun Searle who is a director of Ashmore Advisory Pty Ltd and a Registered Member of the Australian Institute of Geoscientists. Mr. Searle has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity that he has undertaken to qualify as a Competent Person as defined in the JORC Code and a Qualified Person under the AIM Rules for Companies. Mr Searle consents to the inclusion of the information in relation to the Mineral Resource in the form and context in which it appears.
All Mineral Resources figures reported in the table above represent estimates at December 2023. Mineral Resource estimates are not precise calculations, being dependent on the interpretation of limited information on the location, shape and continuity of the occurrence and on the available sampling results. The totals contained in the above table have been rounded to reflect the relative uncertainty of the estimate. Rounding may cause some computational discrepancies.
Mineral Resources are reported in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (The Joint Ore Reserves Committee Code - JORC 2012 Edition).
Feldspar quality and its intended use is impacted by weathering; with fresh 'Primary' feldspar used for higher specification applications, as opposed to transition 'Weathered' material. Their estimated relative abundances, and concentrate grades are shown in Table 2.
To show the tonnage and grade distribution throughout the entire deposit, a bench breakdown has been prepared using a 10m bench height, shown in Figure 1, with a grade-tonnage curve for the classified resource shown in Figure 2.
Table 2: Material types, recoveries and concentrate grades (recoveries based on laboratory results)
|
|
Measured Mineral Resource |
|||||||||||||||
Type |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|||||||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
||||||||||
Primary |
3.5 |
39.7 |
1.37 |
31.8 |
1.10 |
11.5 |
0.40 |
||||||||||
Total |
3.5* |
39.7 |
1.37 |
31.8 |
1.10 |
11.5 |
0.40 |
||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
|
Indicated Mineral Resource |
|||||||||||||||
Type |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|||||||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
||||||||||
Weathered |
0.5 |
37.1 |
0.17 |
33.9 |
0.15 |
11.2 |
0.05 |
||||||||||
Primary |
9.8 |
40.6 |
3.96 |
30.6 |
2.99 |
11.7 |
1.14 |
||||||||||
Total |
10.2* |
40.5 |
4.13 |
30.8 |
3.14 |
11.7 |
1.19 |
||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
|
Inferred Mineral Resource |
|||||||||||||||
Type |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|||||||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
||||||||||
Weathered |
0.6 |
37.7 |
0.22 |
31.1 |
0.18 |
11.9 |
0.07 |
||||||||||
Primary |
1.4 |
41.0 |
0.59 |
31.4 |
0.45 |
12.6 |
0.18 |
||||||||||
Total |
2.0* |
40.1 |
0.81 |
31.4 |
0.63 |
12.4 |
0.25 |
||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
|
Total Mineral Resource |
|||||||||||||||
Type |
Tonnage |
Feldspar |
Quartz |
Muscovite |
|||||||||||||
|
Mt |
% |
Mt |
% |
Mt |
% |
Mt |
||||||||||
Weathered |
1.0 |
37.4 |
0.38 |
32.3 |
0.33 |
11.6 |
0.12 |
||||||||||
Primary |
14.7 |
40.4 |
5.93 |
31.0 |
4.54 |
11.7 |
1.72 |
||||||||||
Total |
15.7* |
40.2 |
6.31 |
31.1 |
4.87 |
11.7 |
1.84 |
||||||||||
NOTE: As per Table 1 above and in Competent Persons section at end of document.
Total tonnage figures do not include tonnage of spodumene as indicated in the February 2023 Mineral Resource Estimate1 for the Project, nor minor accessory minerals.
Figure 1: Ewoyaa bench tonnage - 10m bench elevation
Figure 2: Ewoyaa feldspar grade - tonnage curve for classified pegmatite resource
A plan view of the deposit areas is shown in Figure 3, with a long section shown in Figure 4 and cross-section within the Ewoyaa Main indicated category zone shown in Figure 5.
Figure 3: Plan View of Ewoyaa Feldspar MRE wireframes and drilling with prospect names
Figure 4: Long Section Z-Z' of Ewoyaa Main wireframes and drilling (View towards 300°; solid colours = Resource1 wireframes, wireframe edges = pegmatite wireframes)
Figure 5: Cross Section A-A' of Ewoyaa Block Model feldspar grades and drilling (with downhole lithium grade along drill hole trace)
The Feldspar MRE is based on a 0.5% reporting cut-off grade within a 0.4% Li2O wireframed pegmatite body. However, when assessing all pegmatite volumes (with no cut-offs applied), there is significant scope to increase the resource tonnage.
Table 3 below shows the overall resource tonnage and grade for the Ewoyaa Main, Ewoyaa Northeast, Ewoyaa South-1 and Ewoyaa South-2 deposits, inclusive of all pegmatite material. For example, the resource can be reported at a significantly larger tonnage by reducing the cut-off grade to 0.2% Li2O, giving an increased resource of 20.8Mt at 41.6% feldspar. However, as feldspar is primarily a by-product of the lithium mining operation, the mine plan will be tailored towards maximising lithium recovery.
Further studies will assess the potential benefits of increased production by reducing the cut-off grade or higher feed grade on overall Project economics, consistent with market price predictions and price trends realised by existing producers.
The Company will conduct further sodium assay analysis and normative mineralogical calculations for the remaining historic and current drill campaigns outside the Ewoyaa Main, Ewoyaa Northeast, Ewoyaa South-1 and Ewoyaa South-2 deposits, with the aim of increasing the current Feldspar MRE.
Table 3: Overall resource tonnage and grade for the deposit, inclusive all pegmatite material
Geology and Geological Interpretation
The Ewoyaa Lithium Project area lies within the Birimian Supergroup, a Proterozoic volcano-sedimentary basin located in Western Ghana. The Project area is underlain by three forms of metamorphosed schist; mica schist, staurolite schist and garnet schist. Several granitoids intrude the basin metasediments as small plugs. These granitoids range in composition from intermediate granodiorite (often medium-grained) to felsic leucogranites (coarse to pegmatoidal grain size), sometimes in close association with pegmatite veins and bodies.
Pegmatite intrusions generally occur as sub-vertical dykes with two dominant trends: either east-southeast (Ewoyaa Northeast) dipping sub-vertically northeast; or north-northeast (Ewoyaa Main) dipping sub-vertically to moderately to the east. Pegmatite thickness varies across the Project, with thinner mineralised units intersected at Ewoyaa Northeast and Ewoyaa South-2 between 10m and 20m; and thicker units intersected at Ewoyaa Main between 30 and 60m, and up to 100m at surface.
Drill Methods
The database contains data for the auger, reverse circulation ("RC") and diamond core ("DD") drilling conducted by the Company since 2018. The drilling was completed by the Company in six phases, commencing in April 2018. All the drilling was undertaken by GeoDrill (Ghana), using both RC and DD rigs.
Drilling at the deposit extends to a vertical depth of approximately 319m and the mineralisation was modelled from surface to a depth of approximately 330m below surface. The Feldspar MRE is based on good quality RC and DD drilling data. Drill hole spacing is predominantly 20m by 20m and 40m by 40m in the well-drilled portions of the Project and up to 80m by 80m to 100m by 100m across the breadth of the known mineralisation.
The RC drilling used a combination of 5.25' and 5.75' face sampling hammers. The DD used PQ and HQ (85mm and 63.5mm) diameter core barrels. The DD holes were completed from surface or as tails with PQ to maximise recovery in weathered zones, with reversion to HQ once ground conditions improved within fresh material.
In 2018, Phase 1 RC holes were completed on a nominal 100m by 50m grid pattern, targeting the Ewoyaa Main mineralised system. Phases 2 to 5 reduced the wide spacing to 80m by 40m and down to 40m by 40m in the well drilled portions of the Project. Phase 5 was a major infill drilling program down to 40m by 40m over most of the Project. Phase 6 included extensional drilling in areas of open mineralisation, as well as close spaced infill drilling in portions of the Ewoyaa deposit.
During Phase 1 and 2, RC drilling bulk samples and splits were collected at the rig for every metre interval drilled, the splits being undertaken using a riffle splitter. During Phase 3, Phase 4, Phase 5 and Phase 6, RC samples were split with a rig mounted cone spitter, which took duplicate samples for quality control purposes.
DD was cut with a core saw and selected half core samples was dispatched to Nagrom Laboratory in Australia for metallurgical test work.
Selected core intervals were cut to quarter core with a saw at one-metre intervals or to geological contacts; and since December 2018, were sent to Intertek Laboratory in Tarkwa, Ghana for sample preparation. Prior to that, samples were sent to SGS Laboratory in Tarkwa for sample preparation.
All Phase 1 samples were submitted to SGS Tarkwa for preparation (PRP100) and subsequently forwarded to SGS Johannesburg and later SGS Vancouver for analysis (ICP90A).
PRP100 - Samples <3kg are dried in trays, crush to 100% passing 2mm, split using a rotary splitter to 5kg and pulverised in a LM2 to a nominal 85% passing 75µm. Approximately 100g sub-sample is taken for assay. All the preparation equipment is flushed with barren material prior to the commencement of the job. Coarse reject material was kept in the original bag.
Since December 2018, samples have been submitted to Intertek Tarkwa (SP02/SP12) for sample preparation. Samples were weighed, dried and crushed to -2mm in a Boyd crusher with an 800-1,200g rotary split, producing a nominal 1,500g split crushed sample, which was subsequently pulverised in a LM2 ring mill. Samples were pulverised to a nominal 85% passing 75µm. All the preparation equipment was flushed with barren material prior to the commencement of the job. Coarse reject material was kept in the original bag. Lab sizing analysis was undertaken on a nominal 1:25 basis. Final pulverised samples (20g) were airfreighted to Intertek in Perth, Australia for assaying.
Sample Analysis Method
Since December 2018, samples were sent to Intertek Laboratory in Perth for analysis (FP6/MS/OES). FP6/MS/OES is an analysis for lithium and a suite of 21 other elements. Detection limits for lithium range between 5ppm and 20,000ppm. The sodium peroxide fusion (in nickel crucibles) is completed with hydrochloric acid to dissolve the sub-sample and is considered a total dissolution. Analysis is conducted by Inductively Coupled Plasma Mass Spectrometry ("ICP-MS").
Prior to December 2018, Phase 1 samples were submitted to SGS Johannesburg and later SGS Vancouver for analysis (ICP90A). ICP90 is a 28-element combination Na2O2 fusion with ICP-OES. ICP-MS was added to some submissions for additional trace element characterisation purposes.
All phase 1 SGS pulps were subsequently sent to Intertek Laboratory Perth for re-analysis (FP6/MS/OES) and included in the resource estimate.
During 2023, 8,793 pulps from the first four drilling campaigns were analysed for Na using four-acid digestion. The majority of these pulps were analysed as 2m composites of the original 1m interval pulps. These re-assayed pulps formed the basis for normative mineralogy calculations by Telemark.
Quality Control
Quality control data for major elements important for normative mineral calculations (Al, Si, K, Ca, Na, Li) were quantitatively reviewed to evaluate the accuracy and precision of the geochemical data. Data were taken from three client-inserted certified reference materials (CRM) produced by AMIS (AMIS0682, AMIS0683, AMIS0684) using a mix of sodium peroxide fusion and fusion XRF analyses completed by Intertek, Perth. Sodium data were added for selected samples in 2023 using a 4-acid digestion to allow for normative mineral estimation.
The three CRMs used were produced from material from the Ewoyaa lithium deposit and so are ideally matrix-matched for the mineralisation. In addition, field, coarse crush (preparation) and pulp duplicate data have been assessed to constrain the relative precision of the data using the average coefficient of variation ("CVAVG").
A total of 678 granodiorite blanks with low Li content (<50 ppm) were submitted with the drill samples and the major element data have also been assessed for possible cross contamination.
Normative Mineralogy and Mineralogical Model Validation
Normative mineralogy for samples contained within the Project has been calculated using a least-squares minimisation technique called MINSQ. The method requires major and trace element data, as well as a mineralogical model appropriate to the samples. MINSQ calculates a normative mineralogy for each sample that minimises the differences between the observed geochemistry and the predicted geochemistry for a given mineralogy. The purpose of the analysis is to estimate the amount of by-product quartz, feldspar and muscovite available from the mining of spodumene in mineralised pegmatites.
Minerals having overlapping compositions such as potassium feldspar and muscovite which are common in pegmatites require quantitative mineralogical data to determine whether a consistent ratio between different minerals having similar compositions can be applied to the data. A total of 65 samples were analysed by semi-quantitative XRD at Microanalysis Australia, Mount Lawley, Western Australia using a normalised reference intensity ratio method and used to validate model predictions from MINSQ.
Two mineralogical models were utilised based on whether the material was fresh or transitional to oxide material with the mineral kaolinite incorporated into the latter model as a replacement for anorthite. Minerals rarely identified in the XRD analyses, or which occur at low concentration and thus have low confidence in their identification, were excluded from the mineralogical model. Therefore, all lithium in the samples reports to the dominant lithium phase spodumene.
As a general observation, the visual agreement between the normative mineralogy and geochemistry is better in the fresh samples compared to transitional samples. This reflects the complexity added to the mineralogy by partially weathered samples, although overall the difference in deviation from the mean between samples within transitional and fresh is small, suggesting that the mineral models used are producing similar results for both material types.
Mineral Resource Classification Criteria
The Ewoyaa Lithium Project deposits show good continuity of the main mineralised units which allowed the drill hole intersections to be modelled into coherent, geologically robust domains. Consistency is evident in the thickness of the structure, and the distribution of grade appears to be reasonable along and across strike.
The Feldspar MRE was classified as a Measured, Indicated and Inferred Mineral Resource based on data quality, sample spacing, and lode continuity. The Measured Mineral Resource was defined within areas of close spaced RC and DD drilling of less than 20m by 20m, and where the continuity and predictability of the lode positions was good. Indicated Mineral Resource was defined within areas of close spaced RC and DD drilling of less than 40m by 40m, and where the continuity and predictability of the lode positions was good.
In addition, Indicated Mineral Resource was confined to the fresh rock. The Inferred Mineral Resource was assigned to transitional material, areas where drill hole spacing was greater than 40m by 40m, where small, isolated pods of mineralisation occur outside the main mineralised zones, and to geologically complex zones.
Estimation Methodology
A Surpac block model was created to encompass the extents of the known mineralisation. The block model was rotated on a bearing of 30°, with block dimensions of 10m NS by 10m EW by 5m vertical with sub-cells of 2.5m by 2.5m by 1.25m. The block size was selected based on results of Kriging Neighbourhood Analysis ("KNA") and also in consideration of two predominant mineralisation orientations of 30° and 100 to 120°.
The parent block size was selected based on KNA, while dimensions in other directions were selected to provide sufficient resolution to the block model in the across-strike and down-dip direction.
Bulk densities ranging between 1.7t/m3 and 2.78t/m3 were assigned in the block model dependent on lithology, mineralisation and weathering. These densities were applied based on 13,901 bulk density measurements conducted by the Company on 101 DD holes and 35 RC holes with diamond tails conducted across the breadth of the Project. The measurements were separated using weathering surfaces, geology and mineralisation solids, with averages assigned in the block model.
Cut-off Grade
The Statement of Mineral Resources has been constrained by the mineralisation solids and reported above a cut-off grade of 0.5% Li2O. The reporting cut-off grade is supported by a high-level Whittle optimisation.
Mining and Metallurgical Methods and Parameters
The Statement of Mineral Resources has been constrained by the mineralisation solids, reported at a cut-off grade of 0.5% Li2O. Whittle optimisations demonstrate reasonable prospects for eventual economic extraction.
Based on the Ewoyaa DFS (refer announcement of 29 June 2023), the Company could produce approximately 500,000 to 1,000,000 tonnes per annum of mixed potassium oxide (K2O) / sodium oxide (Na2O) feldspar as a by-product from spodumene concentrate to be sold for lithium purification. Initial test work assessed the quality of two size fractions derived from dense media separation ("DMS"); 2.6 SG oversize fraction with high total alkalis ("O/F") and 2.6 SG undersize fraction with lower alkalis ("U/F") but significant Li2O at approximately 0.70%, which is a strong flux.
Following examination of chemical and mineralogical composition, ceramic application trials were undertaken in Stoke-on-Trent (The Potteries) for vitreous hotelware, high-end earthenware and floor tiles. Samples were wet ground to the required particle size and incorporated into commercial recipes, substituting for standard feldspars and nepheline syenite. Each prepared body was factory fired and, in the case of vitreous hotelware and high-end earthenware, biscuit (not glazed), glazed and decorated pieces were produced.
In all cases, the trial firings produced acceptable ware, comparable to industry standards in all aspects, including contraction, water absorption, density, porosity, shape, colour and appearance. Good results were delivered at the vitreous hotelware factory (a world leading manufacturer of tableware for the international hospitality industry), where the Ewoyaa feldspars were substituted for Forshammer feldspar (produced in Sweden by Sibelco) (refer Figure 6).
Further geological, geotechnical, engineering and metallurgical studies are recommended to further define the feldspar mineralisation and marketable products.
Figure 6: Trial-fired ceramic plates and bowls, manufactured in biscuit (unglazed), glazed and decorated forms (left to right), comprising of trial standard, O/F sample and U/F sample (top to bottom). The trials, which deemed that no visual differences were detected between the trial standard and sample plates, successfully produced industry-accepted standard of ware across all aspects.
JORC Table 1, Section 1 (Sampling Techniques and Data) and Section 2 (Reporting of Exploration Results) are included in Appendix 1.
JORC Table 1, Section 3 (Estimation and Reporting of Mineral Resources) is included in Appendix 2.
End Notes
1 Ore Reserves, Mineral Resources and Production Targets
The information in this announcement that relates to Ore Reserves, Mineral Resources and Production Targets complies with the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code). The information in this announcement relating to the Mineral Resource Estimate ("MRE") of 35.3Mt @ 1.25% Li2O for Ewoyaa is extracted from the Company's announcement dated 1 February 2023, which is available at atlanticlithium.com.au. The MRE includes a total of 3.5Mt @ 1.37% Li2O in the Measured category, 24.5Mt @ 1.25% Li2O in the Indicated category and 7.4Mt @ 1.16% Li2O in the Inferred category. The Company confirms that all technical parameters underpinning the MRE continue to apply. Material assumptions for the Project have been revised on grant of the Mining Lease for the Project, announced by the Company on 20 October 2023. The Company is not aware of any new information or data that materially affects the information included in this announcement or the announcements dated 1 February 2023 and 20 October 2023.
Competent Persons
Information in this report relating to the exploration results is based on data reviewed by Mr Lennard Kolff (MEcon. Geol., BSc. Hons ARSM), Chief Geologist of the Company. Mr Kolff is a Member of the Australian Institute of Geoscientists who has in excess of 20 years' experience in mineral exploration and is a Qualified Person under the AIM Rules. Mr Kolff consents to the inclusion of the information in the form and context in which it appears.
Information in this report relating to Mineral Resources was compiled by Shaun Searle, a Member of the Australian Institute of Geoscientists. Mr Searle has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Mr Searle is a director of Ashmore. Ashmore and the Competent Person are independent of the Company and other than being paid fees for services in compiling this report, neither has any financial interest (direct or contingent) in the Company.
This announcement contains inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) 596/2014 as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 ("MAR"), and is disclosed in accordance with the Company's obligations under Article 17 of MAR.
Neil Herbert (Executive Chairman)
Amanda Harsas (Finance Director and Company Secretary)
www.atlanticlithium.com.au |
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IR@atlanticlithium.com.au |
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Tel: +61 2 8072 0640 |
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SP Angel Corporate Finance LLP Nominated Adviser Jeff Keating Charlie Bouverat Tel: +44 (0)20 3470 0470 |
Yellow Jersey PR Limited Charles Goodwin Bessie Elliot Tel: +44 (0)20 3004 9512
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About Atlantic Lithium
Atlantic Lithium is an AIM and ASX-listed lithium company advancing a portfolio of lithium projects in Ghana and Côte d'Ivoire through to production.
The Company's flagship project, the Ewoyaa Project in Ghana, is a significant lithium spodumene pegmatite discovery on track to become Ghana's first lithium-producing mine.
The Definitive Feasibility Study for the Project indicates the production of 3.6Mt of spodumene concentrate over a 12-year mine life, making it one of the top 10 largest spodumene concentrate mines in the world.
The Project, which was awarded a Mining Lease in October 2023, is being developed under a funding agreement with Piedmont Lithium Inc.
Atlantic Lithium holds 509km2 and 774km2 of tenure across Ghana and Côte d'Ivoire respectively, comprising significantly under-explored, highly prospective licences.
APPENDIX 1 - JORC Code (2012) Table 1, Sections 1 and 2
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections).
Criteria |
JORC Code Explanation |
Commentary |
Sampling techniques |
· Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. · Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. · Aspects of the determination of mineralisation that are Material to the Public Report. In cases where 'industry standard' work has been done this would be relatively simple (eg 'reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay'). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information. |
· RC drill holes were routinely sampled at 1m intervals with a nominal 3-6kg sub-sample split off for assay using a rig-mounted cone splitter at 1m intervals. · DD holes were quarter core sampled at 1m intervals or to geological contacts for geochemical analysis. · For assaying, splits from all prospective ore zones (i.e. logged pegmatites +/- interburden) were sent for assay. Outside of these zones, the splits were composited to 4m using a portable riffle splitter. · Holes without pegmatite were not assayed. · Approximately 5% of all samples submitted were standards and coarse blanks. Blanks were typically inserted with the interpreted ore zones after the drilling was completed. · Approximately 2.5% of samples submitted were duplicate samples collected after logging using a riffle splitter and sent to an umpire laboratory. This ensured zones of interest were duplicated and not missed during alternative routine splitting of the primary sample. · Prior to the December 2018 - SGS Tarkwa was used for sample preparation (PRP100) and subsequently forwarded to SGS Johannesburg for analysis; and later SGS Vancouver for analysis (ICP90A). · Post December 2018 to present - Intertek Tarkwa was used for sample preparation (SP02/SP12) and subsequently forwarded to Intertek Perth for analysis (FP6/MS/OES - 21 element combination Na2O2 fusion with combination OES/MS). · ALS Laboratory in Brisbane was used for the Company's initial due diligence work programs and was selected as the umpire laboratory since Phase 1. ALS conducts ME-ICP89, with a Sodium Peroxide Fusion. Detection limits for lithium are 0.01-10%. Sodium Peroxide fusion is considered a "total" assay technique for lithium. In addition, 22 additional elements assayed with Na2O2 fusion, and combination MS/ICP analysis. · During 2023, 8,793 pulps from the first four drilling campaigns were analysed for Na using four-acid digestion. The majority of these pulps were analysed as 2m composites of the original 1m interval pulps. |
Drilling techniques |
· Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). |
· Six phases of drilling were undertaken at the Project using RC and DD techniques. All the RC drilling used face sampling hammers. · Phase 1 and 2 programs used a 5.25 inch hammers while Phase 3 used a 5.75-inch hammer. Phase 5 and 6 programmes used 5.5 inch hammer for RC and diamond pre-collar drilling. · All DD holes were completed using PQ and HQ core from surface (85mm and 63.5mm). · All DD holes were drilled in conjunction with a Reflex ACT II tool; to provide an accurate determination of the bottom-of-hole orientation. · All fresh core was orientated to allow for geological, structural and geotechnical logging by a Company geologist. |
Drill sample recovery |
· Method of recording and assessing core and chip sample recoveries and results assessed. · Measures taken to maximise sample recovery and ensure representative nature of the samples. · Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. |
· A semi-quantitative estimate of sample recovery was completed for the vast majority of drilling. This involved weighing both the bulk samples and splits and calculating theoretical recoveries using assumed densities. Where samples were not weighed, qualitative descriptions of the sample size were recorded. Some sample loss was recorded in the collaring of the RC drill holes. · DD recoveries were measured and recorded. Recoveries in excess of 95.8% have been achieved for the DD drilling program. Drill sample recovery and quality is adequate for the drilling technique employed. · The DD twin program has identified a positive grade bias for lithium in the DD compared to the RC results. |
Logging |
· Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. · Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. · The total length and percentage of the relevant intersections logged. |
· All drill sample intervals were geologically logged by Company geologists. · Where appropriate, geological logging recorded the abundance of specific minerals, rock types and weathering using a standardised logging system that captured preliminary metallurgical domains. · All logging is qualitative, except for the systematic collection of magnetic susceptibility data which could be considered semi quantitative. · Strip logs have been generated for each drill hole to cross-check geochemical data with geological logging. · A small sample of washed RC drill material was retained in chip trays for future reference and validation of geological logging, and sample reject materials from the laboratory are stored at the Company's field office. · All drill holes have been logged and reviewed by Company technical staff. · The logging is of sufficient detail to support the current reporting of a Mineral Resource. |
Sub-sampling techniques and sample preparation |
· If core, whether cut or sawn and whether quarter, half or all core taken. · · If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. · For all sample types, the nature, quality and appropriateness of the sample preparation technique. · Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. · Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling. · Whether sample sizes are appropriate to the grain size of the material being sampled. |
· RC samples were cone split at the drill rig. For interpreted waste zones the 1 or 2m rig splits were later composited using a riffle splitter into 4m composite samples. · DD core was cut with a core saw and selected half core samples totalling 427.1kg dispatched to Nagrom Laboratory in Perth for preliminary metallurgical test work. · The other half of the core, including the bottom-of-hole orientation line, was retained for geological reference. · The remaining DD core was quarter cored for geochemical analysis. · Since December 2018, samples were submitted to Intertek Tarkwa (SP02/SP12) for sample preparation. Samples were weighed, dried and crushed to -2mm in a Boyd crusher with an 800-1,200g rotary split, producing a nominal 1,500g split crushed sample; which was subsequently pulverised in a LM2 ring mill. Samples were pulverised to a nominal 85% passing 75µm. All the preparation equipment was flushed with barren material prior to the commencement of the job. Coarse reject material was kept in the original bag. Lab sizing analysis was undertaken on a nominal 1:25 basis. Final pulverised samples (20g) were airfreighted to Intertek in Perth for assaying. · The vast majority of samples were drilled dry. Moisture content was logged qualitatively. All intersections of the water table were recorded in the database. · Field sample duplicates were taken to evaluate whether samples were representative and understand repeatability, with good repeatability. · Sample sizes and laboratory preparation techniques were appropriate and industry standard. |
Quality of assay data and laboratory tests |
· The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. · For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. · Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established. |
· Analysis for lithium and a suite of other elements for Phase 1 drilling was undertaken at SGS Johannesburg / Vancouver by ICP-OES after Sodium Peroxide Fusion. Detection limits for lithium (10ppm - 100,000ppm). Sodium Peroxide fusion is considered a "total" assay technique for lithium. · During 2023, 8,793 pulps from the first four drilling campaigns were analysed for Na using four-acid digestion at Intertek laboratory, Perth. The majority of these pulps were analysed as 2m composites of the original 1m interval lithium pulps. · Review of standards and blanks from the initial submission to Johannesburg identified failures (multiple standards reporting outside control limits). A decision was made to resubmit this batch and all subsequent batches to SGS Vancouver - a laboratory considered to have more experience with this method of analysis and sample type. · Results of analyses for field sample duplicates are consistent with the style of mineralisation and considered to be representative. Internal laboratory QAQC checks are reported by the laboratory, including sizing analysis to monitor preparation and internal laboratory QA/QC. These were reviewed and retained in the company drill hole database. · 155 samples were sent to an umpire laboratory (ALS) and/assayed using equivalent techniques, with results demonstrating good repeatability. · Atlantic Lithium's review of QAQC suggests the SGS Vancouver and Intertek Perth laboratories performed within acceptable limits. · No geophysical methods or hand-held XRF units have been used for determination of grades in the Mineral Resource. |
Verification of sampling and assaying |
· The verification of significant intersections by either independent or alternative company personnel. · The use of twinned holes. · Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. · Discuss any adjustment to assay data. |
· Significant intersections were visually field verified by company geologists and Shaun Searle of Ashmore during the 2019 site visit. · Drill hole data was compiled and digitally captured by Company geologists in the field. Where hand-written information was recorded, all hardcopy records were kept and archived after digitising. · Phase 1 and 2 drilling programs were captured on paper or locked excel templates and migrated to an MS Access database and then into Datashed (industry standard drill hole database management software). Since the Phase 3 drilling program data was captured using LogChief which has inbuilt data validation protocols. All analytical results were transferred digitally and loaded into the database by a Datashed consultant. · The data was audited, and any discrepancies checked by the Company personnel before being updated in the database. · Twin DD holes were drilled to verify results of the RC drilling programs. Results indicate a positive bias towards the DD method when compared to RC drilling for Li2O, and it was shown that there is severe iron contamination in the RC drilling process. · Reported drill hole intercepts were compiled by the Chief Geologist. · Adjustments to the original assay data included converting Li ppm to Li2O%. |
Location of data points |
· Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. · Specification of the grid system used. · Quality and adequacy of topographic control. |
· The collar locations were surveyed in WGS84 Zone 30 North using DGPS survey equipment, which is accurate to 0.11mm in both horizontal and vertical directions. All holes were surveyed by qualified surveyors. Once validated, the survey data was uploaded into Datashed. For the current resource upgrade, HHGPS collar positions were used. · RC drill holes were routinely down hole surveyed every 6m using a combination of EZ TRAC 1.5 (single shot) and Reflex Gyroscopic tools. · After the tenth drill hole, the survey method was changed to Reflex Gyro survey with 6m down hole data points measured during an end-of-hole survey. · All Phase 2 and 3 drill holes were surveyed initially using the Reflex Gyro tool, but later using the more efficient Reflex SPRINT tool. · All Phase 4 and 5 drill holes were surveyed with a Reflex SPRINT tool. · LiDAR survey completed by Southern Mapping to produce rectified colour images and a digital terrain model (DTM) over 32km2 · C206 Aircraft - mounted LiDAR Riegl Q780 Camera Hasselblad H5Dc with 50mm Fixfocus lens. · Coordinate system: WGS84 UTM30N with accuracy to ±0.04 · The topographic survey and photo mosaic output from the survey is accurate to 20mm. · Locational accuracy at collar and down the drill hole is considered appropriate for resource estimation purposes. |
Data spacing and distribution |
· Data spacing for reporting of Exploration Results. · Whether the data spacing, and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. · Whether sample compositing has been applied. |
· The RC holes were initially drilled on 100m spaced sections and 50m hole spacings orientated at 300° or 330° with dips ranging from -50° to -60°. Planned hole orientations/dips were occasionally adjusted due to pad and/or access constraints. · For Phase 2 and 3 programs, hole spacing was reduced to 80m spaced sections and 40m hole spacings orientated at 300° or 310°, while the Abonko, Kaampakrom and Ewoyaa NE trends were drilled at 220°, with dips of -50°. · Samples were composited to 1m and 2m intervals prior to estimation. |
Orientation of data in relation to geological structure |
· Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. · If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. |
· The drill line and drill hole orientation are oriented as close as practicable to perpendicular to the orientation of the general mineralised orientation. · Most of the drilling intersects the mineralisation at close to 90 degrees ensuring intersections are representative of true widths. It is possible that new geological interpretations and/or infill drilling requirements may result in changes to drill orientations on future programs. · No orientation-based sampling bias has been identified in the data. |
Sample security |
· The measures taken to ensure sample security. |
· Samples were stored on site prior to road transportation by Company personnel to the SGS preparation laboratory. · With the change of laboratory to Intertek, samples were picked up by the contractor and transported to the sample preparation facility in Takoradi. · For the Na analysis, stored pulps were retrieved from secure container storage at the project field site for compositing, re-packing and delivery to Intertek. |
Audits or reviews |
· The results of any audits or reviews of sampling techniques and data. |
· Prior to the drilling program, a third-party Project review was completed by an independent consultant experienced with the style of mineralisation. · In addition, Shaun Searle of Ashmore reviewed drilling and sampling procedures during the 2019 site visit and found that all procedures and practices conform to industry standards. |
Section 2 Reporting of Exploration Results
Criteria |
JORC Code Explanation |
Commentary |
Mineral tenement and land tenure status |
· Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. · The security of the tenure held at the time of reporting along with any known impediments to obtaining a license to operate in the area. |
· The Project covers two contiguous licences, the Mankessim (RL 3/55) and Mankessim South (PL3/109) licence. · The Mankessim licence is a joint-venture, with the licence in the name of the joint-venture party (Barari DV Ghana Limited). Document number: 0853652-18. · The Project occurs within a Mineral Prospecting licence and was renewed on the 27 July 2021 for a further three-year period, valid until 27 July 2024. · The Mankessim South licence is a wholly-owned subsidiary of Green Metals Resources. The Mineral Prospecting licence renewal was submitted in Nov 2022 for a further three-year period. · The tenement is in good standing with no known impediments. · Mining Lease granted in respect of the Project for a period of 15 years, effective 20 October 2023 until 19 October 2038, file number ML 3/239. |
Exploration done by other parties |
· Acknowledgment and appraisal of exploration by other parties. |
· Historical trenching and mapping were completed by the Ghana Geological survey during the 1960s. But for some poorly referenced historical maps, none of the technical data from this work was located. Many of the historical trenches were located, cleaned and re-logged. No historical drilling was completed. |
Geology |
· Deposit type, geological setting and style of mineralisation. |
· Pegmatite-hosted lithium deposits are the target for exploration. This style of mineralisation typically forms as dykes and sills intruding or in proximity to granite source rocks. · Surface geology within the Project area typically consists of sequences of staurolite and garnet-bearing pelitic schist and granite with lesser pegmatite and mafic intrusives. Outcrops are typically sparse and confined to ridge tops with colluvium and mottled laterite blanketing much of the undulating terrain making geological mapping challenging. The hills are often separated by broad, sandy drainages. · The Ewoyaa pegmatites contain relatively consistent amounts of spodumene (within the mineralised zones), quartz, albite, potassic feldspar ("k-feldspar") and muscovite mica, along with numerous other minerals in relatively minor amounts. |
Drill hole information |
· A summary of all information material to the under-standing of the exploration results including a tabulation of the following information for all Material drill holes: · easting and northing of the drill hole collar · elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collar · dip and azimuth of the hole · down hole length and interception depth · hole length · If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case. |
· Exploration results are not being reported. · All information has been included in the appendices. No drill hole information has been excluded. |
Data aggregation methods |
· In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (e.g. cutting of high grades) and cut-off grades are usually Material and should be stated. · Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. · The assumptions used for any reporting of metal equivalent values should be clearly stated. |
· Exploration results are not being reported. · Not applicable as a Mineral Resource is being reported. · No metal equivalent values are being reported. |
Relationship between mineralisation widths and intercept lengths |
· These relationships are particularly important in the reporting of Exploration Results. · If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. · If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (e.g. 'down hole length, true width not known'). |
· The drill line and drill hole orientation are oriented as close to 90 degrees to the orientation of the anticipated mineralised orientation as practicable. · The majority of the drilling intersects the mineralisation between 60 and 80 degrees. |
Diagrams |
· Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported. These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. |
· Relevant diagrams have been included within the Mineral Resource report main body of text. |
Balanced Reporting |
· Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. · Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. |
· All hole collars were surveyed WGS84 Zone 30 North grid using a differential GPS. All RC and DD holes were down-hole surveyed with a north-seeking gyroscopic tool. · Exploration results are not being reported. |
Other substantive exploration data |
· Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples - size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. |
· Results were estimated from drill hole assay data, with geological logging used to aid interpretation of mineralised contact positions. · Geological observations are included in the report. |
Further work |
· The nature and scale of planned further work (e.g. tests for lateral extensions or depth extensions or large- scale step-out drilling). · Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. |
· Follow up RC and DD drilling will be undertaken. · Further metallurgical test work may be required as the Project progresses through the study stages. · Drill spacing is currently considered adequate for the current level of interrogation of the Project. |
APPENDIX 2 - JORC Code (2012) Table 1, Section 3
Section 3 Estimation and Reporting of Mineral Resources
Criteria |
JORC Code Explanation |
Commentary |
Database integrity |
· Measures taken to ensure that data has not been corrupted by, for example, transcription or keying errors, between its initial collection and its use for Mineral Resource estimation purposes. · Data validation procedures used. |
· The database has been systematically audited by Atlantic Lithium geologists. · All drilling data has been verified as part of a continuous validation procedure. Once a drill hole is imported into the database a report of the collar, down-hole survey, geology, and assay data are produced. This is then checked by an Atlantic Lithium geologist and any corrections are completed by the database manager. |
Site visits |
· Comment on any site visits undertaken by the Competent Person and the outcome of those visits. · If no site visits have been undertaken indicate why this is the case. |
· A site visit was conducted by Shaun Searle of Ashmore during February 2019. Shaun inspected the deposit area, drill core/chips and outcrop. During this time, notes and photos were taken. Discussions were held with site personnel regarding drilling and sampling procedures. No major issues were encountered. |
Geological interpretation |
· Confidence in (or conversely, the uncertainty of) the geological interpretation of the mineral deposit. · Nature of the data used and of any assumptions made. · The effect, if any, of alternative interpretations on Mineral Resource estimation. · The use of geology in guiding and controlling Mineral Resource estimation. · The factors affecting continuity both of grade and geology. |
· The confidence in the geological interpretation is considered to be good and is based on visual confirmation in outcrop and within drill hole intersections. · Geochemistry and geological logging have been used to assist identification of lithology and mineralisation. · The Project area lies within the Birimian Supergroup, a Proterozoic volcano-sedimentary basin located in Western Ghana. The Project area is underlain by three forms of metamorphosed schist; mica schist, staurolite schist and garnet schist. Several granitoids intrude the basin metasediments as small plugs. These granitoids range in composition from intermediate granodiorite (often medium grained) to felsic leucogranites (coarse to pegmatoidal grain size), sometimes in close association with pegmatite veins and bodies. Pegmatite intrusions generally occur as sub-vertical dykes with two dominant trends: either east-northeast or north-northeast and dip sub-vertically to moderately southeast to east-southeast. Thickness varies across the Project, with thinner mineralised units intersected at Abonko and Kaampakrom between 4 to 12m; and thicker units intersected at Ewoyaa Main between 30 to 60m And up to 100m at surface. · Infill drilling has supported and refined the model and the current interpretation is considered robust. · Observations from the outcrop of mineralisation and host rocks; as well as infill drilling, confirm the geometry of the mineralisation. · Infill drilling has confirmed geological and grade continuity. |
Dimensions |
· The extent and variability of the Mineral Resource expressed as length (along strike or otherwise), plan width, and depth below surface to the upper and lower limits of the Mineral Resource. |
· The Project Mineral Resource area extends over a north-south strike length of 4,390m (from 577,380mN - 581,770mN), and includes the 360m vertical interval from 80mRL to -280mRL. |
Estimation and modelling techniques |
· The nature and appropriateness of the estimation technique(s) applied and key assumptions, including treatment of extreme grade values, domaining, interpolation parameters and maximum distance of extrapolation from data points. If a computer assisted estimation method was chosen include a description of computer software and parameters used. · The availability of check estimates, previous estimates and/or mine production records and whether the Mineral Resource estimate takes appropriate account of such data. · The assumptions made regarding recovery of by-products. · Estimation of deleterious elements or other non-grade variables of economic significance (eg sulphur for acid mine drainage characterisation). · In the case of block model interpolation, the block size in relation to the average sample spacing and the search employed. · Any assumptions behind modelling of selective mining units. · Any assumptions about correlation between variables. · Description of how the geological interpretation was used to control the resource estimates. · Discussion of basis for using or not using grade cutting or capping. · The process of validation, the checking process used, the comparison of model data to drill hole data, and use of reconciliation data if available. |
· Using parameters derived from modelled variograms, Ordinary Kriging ("OK") was used to estimate average block grades in three passes using Surpac software. Linear grade estimation was deemed suitable for the Cape Coast Mineral Resource due to the geological control on mineralisation. The extrapolation of the lodes along strike and down-dip has been limited to a distance of 40m. Zones of extrapolation are classified as Inferred Mineral Resource. · It is assumed that there are no by-products or deleterious elements as shown by metallurgical test work. · The Li2O (%), Fe (%), K (%), Al (%), Mn (%), Na (%) and Ti (ppm) grades; as well as spodumene (%), quartz (%), albite (%), k-feldspar (%) and muscovite (%) mineral contents were interpolated into the Surpac block model. · A Surpac block model was created to encompass the extents of the known mineralisation. The block model was rotated on a bearing of 30°, with block dimensions of 10m NS by 10m EW by 5m vertical with sub-cells of 2.5m by 2.5m by 1.25m. The parent block size dimension was selected on the results obtained from Kriging Neighbourhood Analysis and also in consideration of two predominant mineralisation orientations of 30° and 100 to 120°. · An orientated 'ellipsoid' search was used to select data and adjusted to account for the variations in lode orientations, however all other parameters were taken from the variography derived from Domains 1, 2, 3, 4, 7 and 8. Up to three passes were used for each domain. First pass had a range of 50m, with a minimum of 8 samples. For the second pass, the range was extended to 100m, with a minimum of 4 samples. For the third pass, the range was extended to 200m, with a minimum of 1 or 2 samples. A maximum of 16 samples was used for each pass with a maximum of 4 samples per hole. · No assumptions were made on selective mining units. · Correlation analysis was conducted on the domains at Ewoyaa Main. · The mineralisation was constrained by pegmatite geology wireframes and internal lithium bearing mineralisation wireframes prepared using a nominal 0.4% Li2O cut-off grade and a minimum down-hole length of 3m. The wireframes were used as hard boundaries for the interpolation. · Statistical analysis was carried out on data from 87 mineralised domains. Following a review of the population histograms and log probability plots and noting the low coefficient of variation statistics, it was determined that the application of high-grade cuts was not warranted. · Validation of the model included detailed visual validation, comparison of composite grades and block grades by strike panel and elevation. Validation plots showed good correlation between the composite grades and the block model grades. |
Moisture |
· Whether the tonnages are estimated on a dry basis or with natural moisture, and the method of determination of the moisture content. |
· Tonnages and grades were estimated on a dry in situ basis. |
Cut-off parameters |
· The basis of the adopted cut-off grade(s) or quality parameters applied. |
· The Statement of Mineral Resources has been constrained by the mineralisation solids and reported a cut-off grade of 0.5% Li2O. Whittle optimisations demonstrate reasonable prospects for eventual economic extraction. |
Mining factors or assumptions |
· Assumptions made regarding possible mining methods, minimum mining dimensions and internal (or, if applicable, external) mining dilution. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider potential mining methods, but the assumptions made regarding mining methods and parameters when estimating Mineral Resources may not always be rigorous. Where this is the case, this should be reported with an explanation of the basis of the mining assumptions made. |
· Ashmore has assumed that the deposit could be mined using open pit mining techniques. A high-level Whittle optimisation of the Mineral Resource supports this view. |
Metallurgical factors or assumptions |
· The basis for assumptions or predictions regarding metallurgical amenability. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider potential metallurgical methods, but the assumptions regarding metallurgical treatment processes and parameters made when reporting Mineral Resources may not always be rigorous. Where this is the case, this should be reported with an explanation of the basis of the metallurgical assumptions made. |
· Based on the ELP Feasibility Study, Atlantic Lithium could produce approximately 500,000 to 1,000,000 tonnes per annum of mixed K2O / Na2O feldspar as a by-product from spodumene concentrate which will be sold for lithium purification. The feldspar will be processed by dense media separation to produce two grades, 2.6 SG O/F with high total alkalis and 2.6 SG U/F with lower alkalis but significant Li2O at approximately 0.70%, which is a strong flux. · Following examination of chemical and mineralogical composition, ceramic application trials were undertaken in Stoke-on-Trent (The Potteries) for vitreous hotelware, high end earthenware and floor tiles. Samples were wet ground to the required particle size and incorporated into commercial recipes, substituting for standard feldpars and nepheline syenite. Each prepared body was factory fired and, in the case of vitreous hotelware and high-end earthenware, biscuit (not glazed), glazed and decorated pieces were produced. · In all cases the trial firings produced acceptable ware, comparable to the standards in all aspects, including contraction, water absorption, density, porosity, shape, colour and appearance. Results at the vitreous hotelware factory (a world leading manufacturer of tableware for the international hospitality industry) where the Atlantic Lithium feldspars substituted for Forshammer feldspar (mined in Sweden by Sibelco) were good. Provided Atlantic Lithium can consistently produce feldspar to the same or better quality than the samples provided, there is a very good potential to compete in local and international ceramic markets for tableware, including vitreous hotelware, earthen ware and floor tiles. |
Environmental factors or assumptions |
· Assumptions made regarding possible waste and process residue disposal options. It is always necessary as part of the process of determining reasonable prospects for eventual economic extraction to consider the potential environmental impacts of the mining and processing operation. While at this stage the determination of potential environmental impacts, particularly for a greenfields project, may not always be well advanced, the status of early consideration of these potential environmental impacts should be reported. Where these aspects have not been considered this should be reported with an explanation of the environmental assumptions made. |
· No assumptions have been made regarding environmental factors. Atlantic Lithium will work to mitigate environmental impacts as a result of any future mining or mineral processing. |
Bulk density |
· Whether assumed or determined. If assumed, the basis for the assumptions. If determined, the method used, whether wet or dry, the frequency of the measurements, the nature, size and representativeness of the samples. · The bulk density for bulk material must have been measured by methods that adequately account for void spaces (vugs, porosity, etc), moisture and differences between rock and alteration zones within the deposit. · Discuss assumptions for bulk density estimates used in the evaluation process of the different materials. |
· Bulk density measurements were completed on selected intervals of diamond core drilled at the deposit. The measurements were conducted at the Cape Coast core processing facility using the water immersion/Archimedes method. The weathered samples were coated in paraffin wax to account for porosity of the weathered samples. · A total of 13,901 measurements were conducted on the Cape Coast mineralisation, with samples obtained from oxide, transitional and fresh material. · Bulk densities ranging between 1.7t/m3 and 2.78t/m3 were assigned in the block model dependent on lithology, mineralisation and weathering. |
Classification |
· The basis for the classification of the Mineral Resources into varying confidence categories. · Whether appropriate account has been taken of all relevant factors (i.e. relative confidence in tonnage/grade estimations, reliability of input data, confidence in continuity of geology and metal values, quality, quantity and distribution of the data). · Whether the result appropriately reflects the Competent Person's view of the deposit. |
· The Mineral Resource estimate is reported here in compliance with the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves' by the Joint Ore Reserves Committee (JORC). The ELP feldspar Mineral Resource was classified as Measured, Indicated and Inferred Mineral Resource based on data quality, sample spacing, and lode continuity; with the same parameters used to classify the lithium Mineral Resource. The Measured Mineral Resource was confined to fresh rock within areas drilled at 20m by 15m along with robust continuity of geology and Li2O grade. The Indicated Mineral Resource was defined within areas of close spaced drilling of less than 40m by 40m, and where the continuity and predictability of the lode positions was good. In addition, Indicated Mineral Resource was classified in weathered rock overlying fresh Measured Mineral Resource. The Inferred Mineral Resource was assigned to transitional material, areas where drill hole spacing was greater than 40m by 40m, where small, isolated pods of mineralisation occur outside the main mineralised zones, and to geologically complex zones. · The input data is comprehensive in its coverage of the mineralisation and does not favour or misrepresent in-situ mineralisation. The definition of mineralised zones is based on high level geological understanding producing a robust model of mineralised domains. This model has been confirmed by infill drilling which supported the interpretation. Validation of the block model shows good correlation of the input data to the estimated grades. · The Mineral Resource estimate appropriately reflects the view of the Competent Person. |
Audits or reviews |
· The results of any audits or reviews of Mineral Resource estimates. |
· Internal audits have been completed by Ashmore which verified the technical inputs, methodology, parameters and results of the estimate. |
Discussion of relative accuracy/ confidence |
· Where appropriate a statement of the relative accuracy and confidence level in the Mineral Resource estimate using an approach or procedure deemed appropriate by the Competent Person. For example, the application of statistical or geostatistical procedures to quantify the relative accuracy of the resource within stated confidence limits, or, if such an approach is not deemed appropriate, a qualitative discussion of the factors that could affect the relative accuracy and confidence of the estimate. · The statement should specify whether it relates to global or local estimates, and, if local, state the relevant tonnages, which should be relevant to technical and economic evaluation. Documentation should include assumptions made and the procedures used. · These statements of relative accuracy and confidence of the estimate should be compared with production data, where available. |
· The geometry and continuity have been adequately interpreted to reflect the applied level of Indicated and Inferred Mineral Resource. The data quality is good, and the drill holes have detailed logs produced by qualified geologists. A recognised laboratory has been used for all analyses. · The Mineral Resource statement relates to global estimates of tonnes and grade. · No historical mining has occurred; therefore, reconciliation could not be conducted. |
APPENDIX 3
Glossary of Terms and Abbreviations
Assay Measure of valuable mineral content.
Block Model A three-dimensional structure into which parameters are interpolated during the resource estimation process.
Competent Person 'CP' Competent Person, as defined by the JORC Code. A 'Competent Person' is a minerals industry professional who is a Member or Fellow of The Australasian Institute of Mining and Metallurgy, or of the Australian Institute of Geoscientists, or of a 'Recognised Professional Organisation' (RPO), as included in a list available on the JORC and ASX websites. These organisations have enforceable disciplinary processes including the powers to suspend or expel a member. A Competent Person must have a minimum of five years relevant experience in the style of mineralisation or type of deposit under consideration and in the activity which that person is undertaking. If the Competent Person is preparing documentation on Exploration Results, the relevant experience must be in exploration. If the Competent Person is estimating, or supervising the estimation of Mineral Resources, the relevant experience must be in the estimation, assessment and evaluation of Mineral Resources. If the Competent Person is estimating, or supervising the estimation of Ore Reserves, the relevant experience must be in the estimation, assessment, evaluation and economic extraction of Ore Reserves.
Core A solid, cylindrical sample of rock typically produced by a rotating drill bit, but sometimes cut by percussive methods.
CVAVG The co-efficient of variation (CV) is a statistical measure of the relative dispersion of data points in a data series around the mean. It represents the ratio of the standard deviation to the mean.
CRM A Certified Reference Material ("CRM") represents a known grade composition control sample and is used to test and validate mineral samples extracted in mining and exploration projects during an assay process.
Cut - off grade The lowest grade of mineralized material that qualifies as ore in a given deposit; rock of the lowest assay included in an ore estimate.
DD Diamond core drilling
Deposit An occurrence of economically interesting minerals.
Dip The angle at which a bed, stratum, or vein is inclined from the horizontal, measured perpendicular to the strike and in the vertical plane.
DMS Dense medium separation
Drillhole Technically, a circular hole drilled by forces applied percussively and/or by rotation; loosely and commonly, the name applies to a circular hole drilled in any manner.
Drilling The operation of making deep holes with a drill for prospecting, exploration, or valuation.
Feldspar Any of a group of crystalline minerals that consist of silicates of aluminium with potassium, sodium, calcium, or barium and that are a basic part of nearly all crystalline rocks. Most common feldspars present at Ewoyaa include albite (sodium feldspar) and orthoclase (potassium feldspar).
Grade The relative quantity or the percentage of ore-mineral or metal content in an orebody.
Exploration The art and science of investigation for the location of undiscovered mineral deposits.
ICP ICP (Inductively Coupled Plasma) Spectroscopy is an analytical technique used to measure and identify elements within a sample matrix based on the ionization of the elements withing the sample.
ICP-MS Inductively coupled plasma mass spectrometry (ICP-MS) is an analytical technique used to measure and identify elements within a sample matrix based on the ionization of the elements withing the sample. ICP-MS uses an argon (Ar) plasma - the ICP - to convert the sample into ions that are then measured using a mass spectrometer - the MS.
Indicated Mineral Resource That part of a Mineral Resource for which quantity, grade (or quality), densities, shape and physical characteristics are estimated with sufficient confidence to allow the application of Modifying Factors in sufficient detail to support mine planning and evaluation of the economic viability of the deposit. Geological evidence is derived from adequately detailed and reliable exploration, sampling and testing gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes, and is sufficient to assume geological and grade (or quality) continuity between points of observation where data and samples are gathered. An Indicated Mineral Resource has a lower level of confidence than that applying to a Measured Mineral Resource and may only be converted to a Probable Ore Reserve.
Inferred Mineral Resource That part of a Mineral Resource for which quantity and grade (or quality) are estimated on the basis of limited geological evidence and sampling. Geological evidence is sufficient to imply but not verify geological and grade (or quality) continuity. It is based on exploration, sampling and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes. An Inferred Mineral Resource has a lower level of confidence than that applying to an Indicated Mineral Resource and must not be converted to an Ore Reserve. It is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.
JORC Code The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves, 2012 Edition, Prepared by the Joint Ore Reserves Committee of The Australasian Institute of Mining and Metallurgy, Australian Institute of Geoscientists and Minerals Council of Australia ("JORC").
Measured Mineral Resource That part of a Mineral Resource for which quantity, grade (or quality), densities, shape, and physical characteristics are estimated with confidence sufficient to allow the application of Modifying Factors to support detailed mine planning and final evaluation of the economic viability of the deposit. Geological evidence is derived from detailed and reliable exploration, sampling and testing gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes, and is sufficient to confirm geological and grade (or quality) continuity between points of observation where data and samples are gathered. A Measured Mineral Resource has a higher level of confidence than that applying to either an Indicated Mineral Resource or an Inferred Mineral Resource. It may be converted to a Proved Ore Reserve or under certain circumstances to a Probable Ore Reserve.
Mineral Resource A concentration or occurrence of solid material of economic interest in or on the Earth's crust in such form, grade (or quality), and quantity that there are reasonable prospects for eventual economic extraction. The location, quantity, grade (or quality), continuity and other geological characteristics of a Mineral Resource are known, estimated or interpreted from specific geological evidence and knowledge, including sampling. Mineral Resources are sub-divided, in order of increasing geological confidence, into Inferred, Indicated and Measured categories.
Mineralisation The process by which minerals are introduced into a rock. More generally, a term applied to accumulations of economic or related minerals in quantities ranging from weakly anomalous to economically recoverable.
MINSQ A least squares spreadsheet method for calculating mineral proportions from whole rock major element analyses.
Modifying Factors Considerations used to convert Mineral Resources to Ore Reserves. These include, but are not restricted to, mining, processing, metallurgical, infrastructure, economic, marketing, legal, environmental, social and governmental factors.
MRE Mineral Resource Estimate
Mt Million tonnes
Muscovite Often called 'white mica', muscovite is the lightest coloured mica mineral and one of the common rock forming minerals in pegmatites. Micas are characterized by a crystal structure consisting of aluminum silicate sheets weakly bound together by layers of positive ions (usually potassium, but sometimes sodium).
Normative mineralogy Normative mineralogy is a calculation of the composition of a rock sample that estimates the idealised mineralogy of a rock based on a quantitative chemical analysis according to the principles of geochemistry. Normative mineral calculations can be achieved via either the CIPW Norm or the Barth-Niggli Norm.
Ore The naturally occurring material from which a mineral or minerals of economic value can be extracted profitably or to satisfy social or political objectives. The term is generally but not always used to refer to metalliferous material and is often modified by the names of the valuable constituent.
Ore Reserves Is the economically mineable part of a Measured and/or Indicated Mineral Resource. It includes diluting materials and allowances for losses, which may occur when the material is mined or extracted and is defined by studies at Pre-Feasibility or Feasibility level as appropriate that include application of Modifying Factors. Such studies demonstrate that, at the time of reporting, extraction could reasonably be justified.
Ordinary Kriging Kriging is one of several methods that use a limited set of sampled data points to estimate the value of a variable over a continuous spatial field. Ordinary kriging is the most widely used kriging method. It serves to estimate a value at a point of a region for which a variogram is known, using data in the neighborhood of the estimation location. Ordinary kriging can also be used to estimate a block value.
Pegmatite A coarsely crystalline granite or other igneous rock with crystals several centimetres in length. Pegmatites are extreme igneous rocks that form during the final stage of a magma's crystallization. They are extreme because they contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks.
Quartz A mineral consisting of silicon dioxide occurring in colourless and transparent or coloured hexagonal crystals or in crystalline masses.
RC Reverse circulation drilling; a type of drilling used in minerals exploration and evaluation that uses compressed air and a percussion hammer to flush material cuttings out of the drill hole through hollow inner tubes to transport samples back to the surfacein a safe and efficient manner without contamination from the strata hole walls.
SG Specific gravity (symbol SG), another name for Relative density: the weight of a volume of fluid or solution as compared to the weight of the same volume of water.
Strike The course or bearing of the outcrop of an inclined bed, vein, or fault plane on a level surface; the direction of a horizontal line perpendicular to the direction of the dip.
Whittle Optimisation The Four-X Whittle Optimisation process uses the Lerchs-Grossmann algorithm to determine the optimal shape for an open pit in three dimensions. Based on the economic input parameters selected it can define a pit outline that has the highest possible total value, subject to the required pit slopes.
Wireframe Three dimensional solids representing geological/mineralogical domains.
XRF X-ray Fluorescence (XRF) is an analytical technique that uses the interaction of X-rays with a material to determine its elemental composition. XRF is suitable for solids, liquids and powders, and in most circumstances is non-destructive.
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