TIDMALBA
RNS Number : 0371D
Alba Mineral Resources PLC
24 June 2021
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Alba Mineral Resources plc
("Alba" or the "Company")
Clogau Gold Mine Update
Sampling of Waste Rock Dump Returns Gold Grades up to 9.89
g/t
Alba Mineral Resources plc (AIM: ALBA) is pleased to report that
the assay results of the initial sampling of the waste rock dump at
the Clogau-St David's Gold Mine (the "Mine") have returned elevated
gold grades of up to 9.89 g/t.
Key Points
-- Gold grades of up to 9.89 g/t have been returned from the
assay laboratory, following analysis of the samples from the eight
pits dug by Alba
-- Average grades returned are up to 4.37 g/t for the fine
fractions and 3.80 g/t for the medium fractions
-- The waste rock dump is close to Alba's pilot processing plant
and could be mined at low cost, adding another route to near-term
gold production at Clogau-St David's Gold Mine
-- Given an estimated in-situ tonnage of approximately 15,000
tonnes for the waste rock dump about 33% of which is comprised of
the <20mm size fraction, this suggests that up to 5,000 tonnes
could be available for processing for gold.
Mark Austin, Alba's Chief Operating Officer, commented:
"These results entrench what we inherently believed in from the
start - that the finer size fractions would be relatively enriched
in gold content due to the 'free' nature of the gold within the
quartz veins. The waste rock dump is in close proximity to our
gravity plant and could be mined at low cost, thereby adding a
valuable adjunct to our production options, especially as the
potential tonnages involved are significant, running into the
thousands of tonnes at economic grades."
Details
The Company has received the assay results from the sampling of
the waste rock dump at Clogau St David's Gold Mine. The purpose of
the exercise was to establish if there was any gold enrichment
within the finer size fractions. The majority of the historical
underground development comprised on-vein reef drives, from which
stopes were developed. After blasting the development faces, the
larger pieces of vein quartz were selectively hand-sorted and sent
to the Mine's processing plant. A large proportion of the finer
material remained and was cleaned out of the development end and
sent to the waste rock dump.
The Waste Rock Dump is measured to cover 2833m (2) and to
contain approximately 15,000 tonnes of broken rock. This tonnage
estimate has been revised following a drone survey of the site.
Also, whereas the Company had previously reported it would dig nine
pits, in fact eight were dug. The sampling involved digging each
pit up to 5m deep and then screening the material to produce a
sample of grain size less than 20mm. Samples of approximately 60
kgs for each pit were then sent to an accredited laboratory where
they were screened to the following size fractions: Coarse:
20mm-5mm; Medium: 4.75mm-2.36mm; and Fine: <2mm.
Each size fraction was split into 5 samples and assayed
separately in order to give a representative average of the gold
deportment. Table 1 shows the notable assay results for individual
samples with grades above 1 g/t highlighted. Table 2 shows a
summary of the average gold grades split into the three size
fractions.
Table 1: Notable Assay Results, Sampling of Waste Rock Dump
Sample Grade Sample Grade Sample Grade Sample Grade Sample Grade
WT1 0.25 WT16 1.35 WT31 0.91 WT46 1.51 WT61 0.77
------ ------- ------ ------- ------ ------- ------ ------- ------
WT2 0.16 WT17 1.17 WT32 0.68 WT47 0.25 WT62 0.38
------ ------- ------ ------- ------ ------- ------ ------- ------
WT3 0.47 WT18 0.26 WT33 1.18 WT48 0.24 WT63 0.55
------ ------- ------ ------- ------ ------- ------ ------- ------
WT4 0.38 WT19 0.49 WT34 0.46 WT49 0.2
------ ------- ------ ------- ------ ------- ------ ------- ------
WT5 0.6 WT20 0.63 WT35 1 WT50 1.05
------ ------- ------ ------- ------ ------- ------ ------- ------
WT6 3.65 WT21 0.93 WT36 0.44 WT51 0.44
------ ------- ------ ------- ------ ------- ------ ------- ------
WT7 2.72 WT22 1.02 WT37 0.27 WT52 0.39
------ ------- ------ ------- ------ ------- ------ ------- ------
WT8 4.0 WT23 0.66 WT38 0.81 WT53 0.76
------ ------- ------ ------- ------ ------- ------ ------- ------
WT9 5.38 WT24 0.35 WT39 0.3 WT54 0.52
------ ------- ------ ------- ------ ------- ------ ------- ------
WT10 3.23 WT25 0.95 WT40 1.55 WT55 0.86
------ ------- ------ ------- ------ ------- ------ ------- ------
WT11 2.53 WT26 0.62 WT41 0.35 WT56 1.17
------ ------- ------ ------- ------ ------- ------ ------- ------
WT12 9.89 WT27 0.58 WT42 2.2 WT57 2.61
------ ------- ------ ------- ------ ------- ------ ------- ------
WT13 3.41 WT28 0.64 WT43 2.48 WT58 0.41
------ ------- ------ ------- ------ ------- ------ ------- ------
WT14 3.69 WT29 0.78 WT44 1.81 WT59 0.37
------ ------- ------ ------- ------ ------- ------ ------- ------
WT15 2.31 WT30 1.66 WT45 3.77 WT60 1.03
------ ------- ------ ------- ------ ------- ------ ------- ------
Table 2 - Average Gold assay results per size fraction (rows
represent individual pits)
Sample Size Fraction Mass Gold Grade g/t
%
Corse (20-5mm) Medium (4.75-2.36mm) Fine (<2mm) Corse Average Medium Average Fine Average
Sample Mass Sample Mass Sample Mass Au (g/t) Au (g/t) Au (g/t)
% % %
-------------------- ------------ ------------- -------------- ------------
39.26 23.16 37.58 0.37 3.80 4.37
-------------------- ------------ ------------- -------------- ------------
52.43 22.35 25.21 0.78 0.78 0.86
-------------------- ------------ ------------- -------------- ------------
55.86 18.07 26.07 0.03 0.25 0.75
-------------------- ------------ ------------- -------------- ------------
46.49 24.61 28.90 0.10 0.62 2.35
-------------------- ------------ ------------- -------------- ------------
54.24 18.64 27.12 0.17 0.44 1.18
-------------------- ------------ ------------- -------------- ------------
65.12 17.08 17.80 0.02 0.01 0.04
-------------------- ------------ ------------- -------------- ------------
56.13 17.17 26.70 0.07 0.13 0.62
-------------------- ------------ ------------- -------------- ------------
56.00 17.41 26.59 0.01 0.01 0.02
-------------------- ------------ ------------- -------------- ------------
52.88 20.05 27.07
-------------------- ------------ ------------- -------------- ------------
Table 2 shows that the Fine fraction (<2mm) has the highest
grade with averages reaching up to 4.37 g/t. As stated above,
individual samples within this size fraction reached up to 9.89
g/t. The highest average grade for the Medium (4.75mm - 2.36mm)
size fraction is 3.80 g/t. If extracted and screened to <20 mm
at the waste rock dump, mill head grades of 0.8 to 2.67 g/t (the
weighted average across the three size fractions) could be achieved
from follow up bulk sampling of material from the top three
sites.
These results are consistent with the gold being coarse in
nature and easily freed from its host rock. This supports the
decision of Alba to install a simple gravity processing plant to
capture the majority of the gold.
Measurements show that the sub-20mm size fraction constitutes up
to 33% of the total mass of the dump. Rudimentary measurements of
the dump indicate an in-situ tonnage of approximately 15,000
tonnes, which implies that up to 5,000 tonnes could be available
for processing for gold.
The waste rock dump sampling results show the spatial
variability of the dump (see Figure 1 in the PDF version of this
RNS) and have given the team a better understanding of how the dump
was constructed. This knowledge will be utilised by the Company
when mining the tip for processing.
Next Steps
The Company intends to focus near-term efforts initially on the
higher-grade zones at the Waste Rock Dump with a view to sampling
and excavating to the base of the dump, which will enable a more
accurate estimate to be made of overall tonnages and grades.
All activities and timelines in this announcement are subject to
the timely receipt of regulatory and other third-party consents and
to the timely availability of contractors, plant and equipment.
This announcement contains inside information for the purposes
of the UK Market Abuse Regulation and the Directors of the Company
are responsible for the release of this announcement.
Forward Looking Statements
This announcement contains forward-looking statements relating
to expected or anticipated future events and anticipated results
that are forward-looking in nature and, as a result, are subject to
certain risks and uncertainties, such as general economic, market
and business conditions, competition for qualified staff, the
regulatory process and actions, technical issues, new legislation,
uncertainties resulting from potential delays or changes in plans,
uncertainties resulting from working in a new political
jurisdiction, uncertainties regarding the results of exploration,
uncertainties regarding the timing and granting of prospecting
rights, uncertainties regarding the timing and granting of
regulatory and other third party consents and approvals,
uncertainties regarding the Company's or any third party's ability
to execute and implement future plans, and the occurrence of
unexpected events.
Without prejudice to the generality of the foregoing,
uncertainties also exist in connection with the ongoing Coronavirus
(COVID-19) pandemic which may result in further lockdown measures
and restrictions being imposed by Governments and other competent
regulatory bodies and agencies from time to time in response to the
pandemic, which measures and restrictions may prevent or inhibit
the Company from executing its work activities according to the
timelines set out in this announcement or indeed from executing its
work activities at all. The Coronavirus (COVID-19) pandemic may
also affect the Company's ability to execute its work activities
due to personnel and contractors testing positive for COVID-19 or
otherwise being required to self-isolate from time to time.
Actual results achieved may vary from the information provided
herein as a result of numerous known and unknown risks and
uncertainties and other factors.
Competent Person Declaration
The information in this release that relates to Exploration
Results has been reviewed by Mr Mark Austin. Mr Austin is a member
of SACNASP (Reg. No. 400235/06), Fellow of The Geological Society
and Fellow of the Geological Society of South Africa. He has a
B.Sc. Honours in Geology with 38 years' experience.
Mark Austin 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 targets, Exploration Results, Mineral
Resources and Ore Reserves', also known as the JORC Code. The JORC
code is a national reporting organisation that is aligned with
CRIRSCO. Mr Austin consents to the inclusion in the announcement of
the matters based on his information in the form and context in
which they appear.
Glossary
Development : activities (including shaft sinking and on-reef
and off-reef tunnelling) required to prepare for mining and
maintain a planned production level.
Reef: a gold-bearing horizon, at Clogau normally a quartz
vein/shear, that may contain economic levels of gold.
Sampling: taking small pieces of rock at intervals along exposed
mineralisation for assay (to determine the mineral content).
Tonne: one tonne is equal to 1 000 kilograms (also known as a
metric ton).
Waste : ore rock mined with an insufficient gold content to
justify processing.
For further information, please contact:
Alba Mineral Resources plc
George Frangeskides, Executive Chairman +44 20 3950 0725
Cairn Financial Advisers LLP (Nomad)
James Caithie / Liam Murray +44 20 7213 0880
ETX Capital (Broker)
Thomas Smith +44 20 7392 1494
Alba's Project and Investment Portfolio
Project (commodity) Location Ownership
Mining Projects
Amitsoq (graphite) Greenland 90%
----------- ----------
Clogau (gold) Wales 90%
----------- ----------
Gwynfynydd (gold) Wales 100%
----------- ----------
Inglefield (copper, cobalt,
gold) Greenland 100%
----------- ----------
Limerick (zinc-lead) Ireland 100%
----------- ----------
Melville Bay (iron ore) Greenland 51%
----------- ----------
TBS (ilmenite) Greenland 100%
----------- ----------
Oil & Gas Investments
Horse Hill (oil) England 11.765%
----------- ----------
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