Drilling Results
Hambledon Mining PLC
24 November 2005
HAMBLEDON MINING PLC
Drilling results and project progress
Hambledon Mining Plc ('Hambledon' or the 'Company), an AIM-listed mining and
exploration company developing precious metal deposits in Kazakhstan, announces
the results from the recent drilling programme and other progress with the
Sekisovskoye project.
Highlights:
•Drilling results show significant extensions within open pit area
•New zones identified in upper levels
•New lower level resource statement adds 2.4% to resource (upper levels
not yet updated for 2005 results)
•Two new mineralised areas, Glinka and Krugliachka, being acquired
•Environmental assessment for mill facility completed and submitted to the
state Environmental Protection Department
•Tailings location study and environmental assessment completed
•Processing plant preliminary design completed; upgrading of access roads
underway
Nick Bridgen, Chief Executive of Hambledon Mining Plc, commented:
'The very high rate of discovery at Sekisovskoye has continued. We are still
finding more gold and we expect to increase our resources further with the
additional underground drilling that will be carried out over winter.
Progress with the permitting process has been good and we are on track for
producing gold next year.
In addition, we also expect to be granted the adjacent territories to Tserkovka,
Glinka and Krugliachka, to add to our excellent expansion opportunities at
Sekisovskoye.'
24th November 2005
ENQUIRIES:
Hambledon Mining Plc Tel: 07791 327180
Nicholas Bridgen, Chief Executive
Bankside Consultants Tel: 0207 367 8888
Michael Spriggs / Michael Padley
2005 Drilling Review
The planned 2005 surface exploration diamond drilling programme for the
Sekisovskoye Project has been concluded and final assay results have been
received. Overall, 32 holes with an average depth of 115m and a maximum of 175m
were drilled to determine possible extensions to and continuity of the
mineralised zones and also for upgrading confidence levels by infill drilling.
In all, 3,392 samples, representing over 3.3 linear kilometres of core, were
fire assayed for gold with grades ranging from 0 to 90.4g/t.
The highlight of the programme was represented by Drillhole GEO131 that
intersected 20m of Orezone 2 at a grade 3 times greater than expected at 9.26g/
t, just 15m beneath the existing pit floor. Positive results from the extension
drilling show that fringe areas of the deposit have additional potential both
along the strike and dip.
A small number of intersections, where drillhole spacing was too wide for
accurate modelling, showed lower grades than expected though additional gold
zones continued to be found in this area. Geologically, this drilling was
important in helping to better define the breccia contact zones and was
successful in providing sufficient information for a complete update of Orezone
2, situated to the north of the main deposit.
The drilling was successful in locating additional gold zones. Exploration will
be continued by a new underground diamond drill rig which will shortly be
drilling from the 440m level, targeting both open pit and underground gold
occurrences.
Specifically, a number of drillhole intersections are highlighted below to
illustrate mineralisation trends identified from this year's drilling results:
• GEO108, situated near the limiting breccia contact zone, intersected a
possible dilation zone 33.7m wide from 31.5 to 65.2m at 2.37g/t. Although
this drillhole intersected the up dip limit of Orezone 6, the drilled
thickness was expected to be only 14m wide at a grade of 1.0g/t. As a
result, the contained gold is 5.7 times greater than estimated. In the same
hole, from 81.6 to 92.6m there is an unexpected 11m wide drilled
intersection at 2.65g/t and is an up dip extension of Orezone 6 at depth.
• GEO115 delineated an unexpected surface zone of mineralisation, from
surface down to 13m at 1.25g/t, situated 12m northwest beyond Orezone 2.
• GEO119, adjacent to GEO108, defined an up dip extension of Orezone 1.5, from
81.9m to 97.5m and representing 15.6m at 0.85g/t with a grade similar to
estimated grades but twice the expected the thickness.
• GEO126, situated in the south western area of the deposit, intersected 43m
of Orezone 1.3 at 1.43g/t, from 39.6m to 82.6m,and here the thickness was
only predicted to be 29m, though the mean sample grade is similar to the
estimate.
• GEO112 intersected the isolated Orezone 7, situated about 170m northwest
along strike from the main deposit, and here the intersection was twice the
thickness and twice the estimated grade for this zone, from 98.1m to 114.5m,
16.4m at 1.59g/t. Former Soviet underground exploration sampling also
discovered gold in this area, as did some former Soviet drillholes. This
hole illustrates very interesting potential for strike extensions to the
mineralisation.
• GEO118 intersections match the predicted grade and thickness of Orezone 6 at
this point, being 41.2m at 0.9g/t from 54.8m to 96.0m and, although overall
it is of relatively low grade, such mineralisation is ideal for open pit
exploitation.
• GEO117 intersected 7.4m at 5.1g/t centred at only 7m below surface, but
restricted to faulted diorite beyond the breccia contact. It is expected
that additional contact zones similar to this type of mineralisation will
be found.
Further planned exploration
The company has purchased an Atlas Copco Diamec 252 underground drill rig to
enable it to drill from the existing 440 (adit) level. Work to clean and prepare
this level is nearing completion. Further drilling will take place from the
existing 320 level, 120m below surface, when the existing shaft has been
equipped.
The successful results on extensions at Sekisovskoye have necessitated follow up
drilling to determine their limits. This is planned for spring next year.
New territories
The Company has sought to expand the exploration base into nearby prospects
which are similar to Sekisovskoye and may be treated in the same or expanded
treatment plant. Two further mineralised areas, Glinka and Krugliachka, covering
a combined area of approximately 10 square kilometres, have been identified
and a formal application has received a positive response.
Krugliachka lies 8 km to the northwest of Sekisovskoye and appears to have the
potential to be another deposit of the Sekisovskoye type, though exploration is
at an early stage. Grab samples on surface of up to 5 g/t gold were discovered
by former Soviet geologists who concluded that the site was worthy of further
exploration. They recommended trenching and shallow drilling in the hope of
discovering zones of secondary enrichment below the oxidised cap, similar to the
high grade area of Sekisovksoye that was mined in Soviet times.
Glinka lies some four kilometres to the north-east of Tserkovka where the local
population has mined kaolin clay. Samples taken from the kaolin pit walls
indicate the possible presence of payable gold-polymetalic mineralisation.
The Company has been informed by the Ministry of Energy and Mineral Resources
that these areas can be considered to be part of the Sekisovskoye-Tserkovka ore
trend and therefore will be granted as an extension of the Tserkovka area
without a tender. We are now awaiting the formal grant.
Resource statement
As reported earlier, analysis of new drilling results and of previous Soviet era
work has indicated that a significant halo of lower grade material exists around
the previously modelled high grade zones. On 30 September 2005 we announced the
results of an analysis of this low grade resource occurring in the upper levels,
potentially suitable for open pit mining. We have now completed a similar
modelling exercise for the lower levels, below the 250m elevation level (more
than 150m from surface). Whilst this material is subeconomic as a specific
target for underground exploitation, in conjunction with the associated
highergrade zones, such mineralisation could be economically mined using
cheaper, bulk mining techniques.. The marginal cost of mining this additional
width is likely to be low, meaning that quite low grade material may be a
significant contributor to profits.
The revised resource statement, including the lower grade material, modelled to
a cut off grade of 0.5 grammes per tonne, is shown below. No change has been
made to the resource statement for the upper levels for which an update was
issued in June 2005
Resource statement
JORC JORC Soviet Soviet Total
Indicated Inferred C2 P1 Resource
(ounces)
Sekisovskoye 1,020,245 371,379 _ 1,400,000 2,791,624
open-pit &
underground
Tserkovka _ _ 145,00 241,000 386,000
Feodulikha
Areas 4 & 5 _ _ _ 354,000 354,000
Total (ounces) 1,020,245 371,379 145,000 1,995,000 3,531,624
Troy oz = 31.10348g Silver included at a gold equivalent of 1:60
Open pit
GeoMine Solutions (Johannesburg) have completed pit optimisation, mine design
and ore scheduling to feasibility study standard. The results, based on the
geological model that was available at the time, have supported work done
in-house and previously announced and have given the directors confidence in the
work being carried out by TOO Sekisovskoye's local Kazakh open pit mine planning
team. The detailed plan will be further enhanced by drilling results already
received and by the underground drilling soon to be started.
Permitting
The Company already has permission in principle to build a process plant and to
start mining on a test basis. In order to do this, it has to submit a detailed
design of the proposed facilities and mine plan for approval. The advantage of
this is that construction can commence in advance of the much more onerous usual
procedure which will be carried out in parallel to enable full and sustained
production to take place in due course.
The most important first step in the usual process is the submission of the
Technical-Economic Basis ('TEO'). This might be compared with a western
feasibility study but must be prepared in a prescribed format and must be
approved by the relevant authorities. In the case of a mining project, it is
necessary to submit what is known as a 'TEO Conditions' which is similar to the
final TEO but is a preliminary step which includes a geological resource
estimate and financial models carried out at various cut-off grades. The purpose
of this is to show that the correct mining parameters, such as cut-off grades
and minimum mining thicknesses, have been selected for the more detailed final
TEO. A separate TEO is required for mining, treatment plant, tailings dam and
any other separable component, though the work undertaken for each of these is
also used in each of the others. The final TEO will then be submitted, including
the final resource calculation prepared using the parameters agreed after the
TEO Conditions submission.
Sekisovskoye has itself obtained licences permitting it to prepare its own
geological and financial parts of the TEO and to carry out various exploration
and production activities. Further licences will be acquired as the project
progresses. The geological resource estimates have been prepared and a draft of
the TEO Conditions has been completed. Initial discussions with the authorities
have already begun.
The final version of the environmental assessment for the milling facilities has
been issued and accepted by the Company. It has now been presented to the State
Environmental Protection Department for review along with the baseline study
completed earlier in the year.
Mill facilities and associated infrastructure
Metallurgical optimisation and variability testing have now been completed in
Australia and are consistent with previous test data. The processing facility
preliminary design has been completed using parameters obtained from the test
and engineering work carried out in Kazakhstan and Australia but adapted to
local regulatory requirements. Negotiations are underway with local design
institutes to complete the final design which will carry on to construction.
Upgrading of access roads will be completed this month. A large 1,350 square
metre former school building has been purchased in Sekisovskoye village and is
being renovated for use as offices and site storage. A grader, suitable for use
as part of the open pit mining fleet, has been ordered early so that it can be
used over winter for snow clearance purposes and preparation of the site for
construction to commence in early 2006.
A suitable second-hand but unused ball-mill has been located in the Ukraine and
is being inspected by the Company's engineers. A contract is being negotiated
for the purchase of a crushing plant which will be commissioned early to produce
material for construction purposes or for sale. An electrical transformer has
been installed to provide power for underground drilling and site construction.
About Hambledon Mining plc
Hambledon Mining plc is an AIM listed mining and exploration company which has
announced the development of an open-pit project at its Sekisovskoye deposit in
East Kazakhstan, prior to the development of the much larger underground
resources. Initial production from the open-pit is expected to be around 30,000
- 35,000 ounces per annum, rising to around 100,000 ounces when the higher grade
underground ore is processed.
The Company also holds the rights to and is exploring the adjacent Tserkovka
deposit. Any ore from these areas will be treated in an expanded plant at
Sekisovskoye.
This information is provided by RNS
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