RHA Tungsten Project Exploration Update Zimbabwe
Premier African Minerals Limited / Ticker: PREM / Index: AIM / Sector: Mining
17 April 2013
Premier African Minerals Limited (`Premier' or `the Company')
New near surface, high grade tungsten mineralised quartz veins identified at
RHA Tungsten Project,Zimbabwe
Update on the Zulu Project option
RHA
Premier African Minerals Limited, the AIM quoted multi-commodity natural
resource company with mineral projects located in Western and Southern Africa,
announces a further positive exploration update at its flagship RHA Tungsten
Project, located in the prospective Kamativi Tin Belt in north-west Zimbabwe
(`RHA' or `the Project'). The Company believes that the Project has the
potential to be developed into a low capital and operating cost tungsten mine
in the near term.
The announcement made on 18 February 2013 reported assay results from a
sampling programme where the entire core from each of the boreholes was split
into 3 m long samples of core. The most recent sample programme (that reported
here) focussed on careful and detailed sample collection respecting changes in
geology and in particular sampling of the mineralised quartz veins.
Overview
* Significant tungsten oxide (`WO3') intersections in 68 of 198 of these
samples.
* Nine samples reported values of more than 50 kg/t WO3. Of these, three were
over 100 kg/t WO3.
* Confirmed three highly mineralised quartz veins in the hanging wall of the
existing lode system and uncovered a previously unknown well-mineralised
lode located under the north face of the hill.
* Tungsten mineralisation identified in the form of coarse wolframite
crystals, hosted within narrow quartz veins of between 5 cm and 30 cm wide.
* Targeted trenching programme currently underway to define the surface
expression of the high-grade veins in the hanging wall of the existing lode
system.
* 3D datamine model being updated in light of results. A concept mine
technical and economic study is underway.
* SAMREC compliant resource statement on target for H1 2013.
Exploration Update
Premier commenced a 1,302 m diamond drilling (`DD') programme in January 2012,
which consisted of five holes (DD002 - DD006) inclined at -45 degrees. In an
initial round of sampling, a quarter of core was sampled over 3 m intervals for
the full length of each borehole and analysed for WO3, copper (`Cu'), tin
(`Sn') and tantalum (`Ta') at the SGS laboratories in Johannesburg.
The positive results received from the first round of sampling (see press
release 18 February 2013) prompted Premier to conduct a further detailed
logging and sampling of the drill core during Q4 2012. Intervals where assay
results returned tungsten values over 0.15% WO3 were the primary target of this
campaign. 198 samples were taken excluding blanks, duplicates and Certified
Reference Materials. The relative density of each sample has been determined by
means of a Density Scale.
These results further confirm the presence of numerous quartz veins that are
highly mineralised with tungsten wolframite. Note: the widths reported are
intersection widths and not the true widths. These results are tabulated below.
Table 3: Individual Veins from DD002.
Vein From(m) To(m) Width (m) W(%) WO3(%) WO3 (kg/t)
A 14.55 14.83 0.28 0.64 0.81 8.07
B 50.64 50.93 0.29 0.15 0.19 1.89
C 51.41 51.79 0.38 5.96 7.52 75.16
D 53.83 54.08 0.25 8.61 10.86 108.57
E 54.88 55.50 0.62 2.54 3.20 32.03
F 55.72 56.03 0.31 1.65 2.08 20.81
G 56.18 56.57 0.39 1.31 1.65 16.52
H 206.14 206.34 0.20 0.07 0.09 0.88
I 207.08 207.38 0.30 0.10 0.13 1.26
J 208.14 208.50 0.36 0.09 0.11 1.13
K 210.65 210.97 0.32 0.39 0.49 4.92
Veins B,C,D,E,F and G fall within a newly identified lode, while the deeper
H,I,J and K veins fall within the known strike extension of Lodes 6 and 7.
Veins B to G are of potential economic interest and further work is planned to
explore them.
Table 4: Individual Veins from DD003.
Vein From(m) To(m) Width (m_ W(%) WO3(%) WO3 (kg/t)
A 71.91 72.16 0.25 1.56 1.97 19.67
B 74.89 75.26 0.37 0.28 0.35 3.53
C 75.95 76.15 0.20 1.19 1.50 15.01
C 76.15 76.30 0.15 2.77 3.49 34.93
C 76.30 76.79 0.49 0.4 0.50 5.04
D 77.32 77.58 0.26 0.67 0.84 8.45
E 77.87 78.18 0.31 0.69 0.87 8.70
F 79.44 79.94 0.50 1.35 1.70 17.02
F 79.94 80.28 0.34 0.47 0.59 5.93
G 82.55 82.93 0.38 0.76 0.96 9.58
H 84.26 84.57 0.31 0.06 0.08 0.76
Veins A to H fall within the strike extension to the east of Veins B to F in
DD003. These veins are also of potential economic interest.
Table 5: Individual Veins from DD004.
Vein From(m) To(m) Width (m) W(%) WO3(%) WO3 (kg/t)
A 98.81 99.00 0.19 9.05 11.41 114.12
B 109.99 110.15 0.16 0.21 0.26 2.65
C 112.35 112.58 0.23 1.61 2.03 20.30
D 112.78 112.98 0.20 4.02 5.07 50.69
E 114.85 115.07 0.22 2.05 2.59 25.85
F 115.41 115.65 0.24 0.89 1.12 11.22
Veins B to F fall on the strike extension of veins noted in boreholes 2 and 3
above and are potentially of economic interest. Vein A is located on the
hanging wall; its correlation with other veins is not certain.
Table 6: Individual Veins from DD005.
Vein From(m) To(m) Width (m) W(%) WO3(%) WO3 (kg/t)
A 166.33 166.58 0.25 4.36 5.50 54.98
B 167.25 167.48 0.23 0.17 0.21 2.14
C 167.73 168.05 0.32 0.28 0.35 3.53
D 168.30 168.52 0.22 0.29 0.37 3.66
E 172.37 172.64 0.27 0.16 0.20 2.02
F 173.23 173.42 0.19 4.99 6.29 62.92
G 176.32 176.60 0.28 3.65 4.60 46.03
H 183.57 184.00 0.43 0.24 0.30 3.03
I 185.12 185.50 0.38 2.04 2.57 25.72
I 185.50 185.75 0.25 2.28 2.88 28.75
J 207.43 207.65 0.22 5.77 7.28 72.76
K 211.69 212.00 0.31 0.19 0.24 2.40
L 213.71 214.00 0.29 0.41 0.52 5.17
This sequence of veins marks a series of vein intersections through the depth
extensions of the known lodes that were mined historically at RHA. The veins'
economic significance will become clearer when Premier update the 3D Datamine
model, which is currently being constructed.
Table 7: Individual Veins from DD006.
Vein From(m) To(m) Width (m) W(%) WO3(%) WO3 (kg/t)
A 29.38 29.50 0.12 10.2 12.86 128.62
B 61.07 61.20 0.13 4.57 5.76 57.63
These vein intersections confirm the existence of previously unrecognised high
grade veins in the hanging wall of the known lode mineralisation. The surface
expression of these veins is the subject of a targeted trenching programme that
is currently underway.
Importantly, the detailed geological logging has revealed that the tungsten
mineralisation is in the form of very coarse wolframite crystals, hosted within
narrow quartz veins. These veins are between 5 cm and 30 cm in width and with
few exceptions are hosted within quartz-tourmaline schist bands that make up
the known lodes.
Techno-economic study
Premier has commissioned mining consultants, CAE Mining of Johannesburg to
construct a 3D Datamine model using information derived from historic plans and
sections, and the results of the historic Falconbridge channel sampling work
undertaken at RHA. This work is now at an advanced stage and the results of
Premier's first round of sampling have been modelled. The analytical results
from Premier's latest round of detailed sampling will be evaluated and included
into the 3D Datamine model. The completed model will be used as the basis for a
concept mine technical and economic study which the Company has commenced.
Further Information on RHA
Premier's RHA project covers 1,800 ha land holding and is located approximately
20 km south-east of Hwange and 270 km north of Bulawayo in the prospective
multi-commodity Kamativi Tin Belt in north-west Zimbabwe. The Project has
excellent infrastructure with electrical power available from a ZESA power
line, industrial water available from the mine dam and domestic water available
from a borehole. Furthermore, the project has easy access via the main
Bulawayo-Victoria Falls tar road and 25 km of gravel road to the mine.
Intermittent small scale mining has been conducted at RHA and the adjacent Tung
mine (which Premier has an option to acquire) 5 km away. Between 1931 and 1979
the mines jointly produced 1,247 tonnes of wolframite concentrate at an average
concentrate grade of 65% WO3.
RHA occupies a low ridge approximately 850 m long and 300 m wide standing about
120 m above its surroundings. Historic mine workings are in the form of adits,
open pits, caved stopes, trenches, roads and rock dumps that occupy the
surface. Tailings dumps are located on the north and south sides of the ridge.
Previous mine development was almost entirely carried out during the 1930s
where the mine was developed on 30 m levels from 945 m to 845 m, by means of
horizontal adits into the sides of the ridge and a single vertical shaft down
to the 845 m level. Some open pitting also occurred on the western part of the
deposit.
During the mid to late 1970s Falconbridge Ltd (which is now part of Xstrata),
trading as Blanket Mines in Zimbabwe, carried out underground geological
mapping and extensive channel sampling on the accessible parts of the
underground workings, principally on the 926, 895 and 859 levels. Exploration
work was curtailed due to the political and security situation prevailing in
the country at that time.
At RHA, the known mineralised lodes and veins occur within an envelope that
extends over a strike of approximately 400 m with a maximum width of 150 m. The
lodes are thought to converge to the east of the property. The lodes strike
approximately northeast-southwest paralleling the regional trend of Kamativi
Inlier. The host country-rock comprises high-grade, strongly foliated biotite
schists and paragneisses of the Precambrian Dete Inlier belonging to the
Tshontada Formation. The formation trends northeast on a regional scale,
paralleling the trend of the Kamativi Inlier, and dips steeply to the
northwest.
The tungsten mineralisation occurs in quartz veins and shear zones, within a
sequence of quartz-tourmaline and pelitic schists that may be associated with
granite intrusions. High metamorphic grades with localised partial melting are
also evident. The schists also show that extreme deformation has occurred and
mylonite bands are common. The association of quartz veins with tourmaline
schists form distinct lodes which were exploited by historic mining at RHA.
These lodes are steeply dipping to the northwest at 80o to90o. Seven lodes were
exploited in the past.
The tungsten mineral of primary economic interest is wolframite (Fe,MnWO4),
with minor amounts of scheelite (CaWO4). The only other mineral of possible
economic significance is chalcopyrite (CuFeS2). The wolframite occurs as
euhedral crystals, laths and clusters that may be up to 50 mm by 30 mm in size.
This very coarse grain size is characteristic of the quartz vein-hosted
tungsten mineralisation.
Qualified Person
The technical information contained in this announcement has been prepared and
reviewed by Robert Ingram BSc, C.Eng., Pr.Nat.Sci., FGSSA, MSEG, and Professor
Alexander du Plessis PrEng, BSc(Eng), MSc(Eng), CertEng, FSAIMM, who are the
appointed consultants to Premier African Minerals Limited. Mr Ingram is
registered with The South African Counsil for Natural Scientific Professions
(SACNASP) Registration Number 400057/92, and Professor du Plessis with the
Engineering Council of South Africa (ECSA) Registration Number 950232. They are
satisfied with the accuracy and precision of this release by Premier African
Minerals Limited.
Zulu Project option
Premier exercised its option to acquire the Zulu Project prior to Admission on
10 December 2012 and intended to complete this transaction shortly thereafter.
Background on the transaction is included in the Admission Document. Completion
has been delayed for technical reasons but once these have been resolved the
transaction will proceed. Shareholders will be updated in due course.
Enquiries:
Pamela Hueston Premier African Minerals Tel: +44 (0) 755 778 3855
Limited
Tony Rawlinson Cairn Financial Advisers LLP Tel: +44 (0) 207 148 7900
(Nominated Adviser)
Jerry Keen Shore Capital Stockbrokers Tel: +44 (0) 207 408 4090
Limited
Edward Mansfield Shore Capital Stockbrokers Tel: +44 (0) 207 408 4090
Limited
Felicity Edwards St Brides Media & Finance Ltd Tel: +44 (0) 20 7236 1177
Notes
Premier African Minerals Limited is a multi-commodity exploration and
development company focussed in Southern and West Africa. The Company has a
diverse portfolio of multi-commodity projects which includes tungsten,
phosphate, rare earth elements (`REE'), gold, lithium, tantalum, uranium and
clays, in Zimbabwe and Togo, at various stages of development. Premier plans to
utilise the strengths of its proven Board and management team, which is highly
experienced in developing resource projects in Africa, to fulfil its strategy
of developing and targeting projects which offer near term value uplift either
through exploration, strategic alliances or commercial opportunities.
The Company has two flagship projects in NW Zimbabwe (tungsten and REE) which
offer near-term resource and future production potential. The RHA Tungsten
Project is described herein, and Premier's second priority project in Zimbabwe
is the Katete REE project, which again has the potential to be developed as an
open pit mine. The project, which spans 3,750 ha, has returned a peak result
from trenching of 14.6% TREO. Premier is targeting to delineate a
Code-compliant resource statement in H1 2013.
In Togo, the Company has prioritised a further two projects for exploration:
the Southern Togo Phosphate Project and the Dapaong Gold project. The Southern
Togo project, which has excellent infrastructure being only 35km from the Port
of Lome, has a conceptual exploration target of 75Mt at 32% Pâ‚‚Oâ‚…. Additionally,
it recently secured the exploration permits for its Dapaong gold project in
northern Togo where there has been significant artisanal activity illustrating
the prospectivity of the unexplored area.
Premier also has a pipeline portfolio of projects which further de-risks the
Company's exposure and it is assessing new opportunities that complement its
investment criteria to drive the Company forward and build a leading
multi-commodity exploration and development company in Africa.