TIDMCAF
RNS Number : 4059C
China Africa Resources PLC
16 April 2013
China Africa Resources Plc
Maiden JORC resource at Berg Aukas Mine
China Africa Resources ("CAF" or the "Company"), the AIM listed
company focused on the development of the Berg Aukas zinc/lead
project in Northern Namibia, is pleased to announce the results of
an independent mineral resource estimate for the Company's 100%
owned Berg Aukas Zinc-Lead-Vanadium Project ("Berg Aukas") in
Namibia.
Highlights:
The JORC Indicated Mineral Resource, of which in excess of 95%
is situated between the 14 and 19 levels (approximately between
350m to 550m below surface, where the majority of historical
resources are located), is 1,264,800 tonnes @ 15.5% zinc, 3.8% lead
and 0.33% V(2) O(5) at a 3% Zn cut-off.
This JORC resource estimate verifies the historical
(non-compliant with current JORC reporting standards) resource
estimate from December 1977 (the "historical resource estimate") of
1,196,000 tonnes @ 15% zinc, 5.3% lead and 0.63% V(2) O(5) between
the 14 and 19 levels, as reported in the Berg Aukas Competent
Persons Report, 2011 ("2011 CPR")
Rod Webster, CEO of CAR commented:
"I am very pleased that the results of this resource estimate,
based on historical data and drilling undertaken by CAF in 2012,
verifies the historical mineral resources at the Berg Aukas Mine.
This is an exceptionally high grade zinc/lead deposit with much of
the significant infrastructure in place, including an 800m shaft
and underground development, which should allow rapid, and cost
effective, reopening of the Berg Aukas Mine".
HISTORICAL MINERAL RESOURCE
As reported in the 2011 CPR, the historical (non-JORC compliant)
resource estimate of December 1977 was 1,651,000 tonnes @ 17% Zn,
5% Pb and 0.6% V(2) O(5) . Approximately 75% of this resource
(1,196,000 tonnes @ 15% zinc, 5.3% lead and 0.63% V(2) O(5) ) is
situated between the 14 and 19 levels (approximately between 350m
to 550m below surface). It is this area which is the focus of the
Company's Berg Aukas feasibility study.
VERIFICATION DRILLING CAMPAIGN
In 2012 the Company undertook a diamond drilling campaign which
confirmed the exceptional grades and general distribution and
continuity of the mineralisation as defined by historical drillhole
data. A total of 11 holes, and four daughter holes, were completed
totalling 6,856m (see CAF RNS of 4(th) December 2012). The drilling
campaign was focused on the Hanging Wall Ore Body ("HWOB") between
the 14 and 19 levels where the majority of the remaining historical
resource is located.
See below for diagram of orebodies and levels:
http://www.rns-pdf.londonstockexchange.com/rns/4059C_-2013-4-15.pdf
The 2012 drilling campaign successfully verified the general
grade tenor, historical drilling results and historical
interpretation of the mineralisation, leading the calculation of a
maiden JORC compliant mineral resource estimate for the
mineralisation between the 14 and 19 levels.
In addition, the drilling campaign obtained representative
samples of the mineralisation for metallurgical testwork, currently
underway at Mintek laboratories in South Africa.
2013 JORC MINERAL RESOURCE
Coffey Mining (SA) Pty Ltd ("Coffey") undertook a mineral
resource estimate in accordance with the requirements of the JORC
Code. This included a site visit, data review and validation,
geological and geostatistical analysis, resource modelling and
mineral resource estimation.
All the resource reported is within the Indicated Category as
defined by the JORC Code. The stated resource is at a 3% Zn
cut-off, but in addition Coffey also calculated the resource at a
range of Zn cut-off grades:
Classification Cut-off Tonnes* Average Average Average
Grade Grade Grade Grade
(Zn%) (Zn (Pb %) (V(2)
%) O(5)
%)
---------------- -------- ---------- -------- -------- --------
Indicated 2.0 1,339,600 14.74 3.69 0.329
---------------- -------- ---------- -------- -------- --------
2.5 1,303,880 15.09 3.76 0.330
---------------- -------- ---------- -------- -------- --------
3.0 1,264,800 15.47 3.84 0.331
-------- ---------- -------- -------- --------
3.5 1,217,930 15.94 3.95 0.333
---------------- -------- ---------- -------- -------- --------
* Tonnages have been reduced by 15% to account for cavities
within the mineralisation which are too small to be modelled
separately.
Berg Aukas is constituted by two licences both of which are 100%
owned by CAF. The figures above therefore constitute the total
project resource and CAF's interest in the resources.
The historical drilling data contains only limited silver data.
While the 2012 drilling programme did intersect significant Ag
grades, including 138g/t Ag over 24m in drillhole BD-012A, there is
insufficient Ag data points in the database to estimate Ag with
sufficient confidence to be reportable under the JORC Code.
However, Ag was interpolated into the block model using the data
available and an average non-JORC compliant grade of approximately
40g/t silver was estimated where Ag data was available.
The resource remains open at depth but with insufficient
drilling below the 19 level to define a resource under the JORC
code. However, the historical resource estimate defines an
'indicated' resource (non-JORC compliant) of 246,000 tonnes @ 21%
Zn, 2% Pb and 0.36% V(2) O(5) below the 19 level.
In addition the same historical resource estimate (non-JORC
compliant) indicates that between the 8 and 14 levels (between
approximately 225m to 350m below surface) there is an additional
141,000 tonnes @ 29.5% Zn, 4.2% Pb and 0.8% V2O5, which may be
accessible from the existing underground infrastructure and No2
shaft.
BERG AUKAS MINE
The Berg Aukas underground mine operated from 1958 to 1978. The
first shaft was established in 1958 with a second shaft sunk in
1968. From 1967 to 1978 it is reported that 2.3 million tonnes of
material @ 15.0% zinc, 3.9% lead and 0.85% V(2) O(5) were hoisted
from the mine, of this 1.5 million tonnes of ore at 21.5% Zn,
5.5%Pb and 1.23% V(2) O(5) was milled.
The mine closed in 1978 and significant resources remain
un-exploited. The majority of the remaining resource is located in
areas of the mine where extensive development is in place,
providing good access to the orebody.
FEASIBILITY STUDY
Metallurgical testwork in the core recovered from the 2012
drilling campaign has commenced at Mintek in South Africa. Now the
resource estimate and orebody modelling is complete the mining
study will commence.
Competent Persons Statement
The information in this report has been reviewed and approved
for release by Ms Kathleen Body, Pr.Sci.Nat, who has over 18 years'
experience in mineral exploration and mineral resource estimation.
Ms Body is a Principal Consultant and full-time employee of Coffey
Mining (South Africa) (Pty) Ltd and contracted to China Africa
Resources PLC. She has sufficient experience in relation to the
style of mineralisation and type of deposit under consideration to
qualify as a Competent Person as defined by the "Australasian Code
for Reporting of Exploration Results, Mineral Resources and Ore
Reserves" (The JORC Code 2012 Edition). Ms Body has consented to
inclusion of this information in the form and context in which it
appears.
For further information please contact:
China Africa Resources Plc +44 (0) 20 7917 2989
Rod Webster, Chief Executive Officer
Nominated Adviser and Broker
RFC Ambrian Limited +44 (0) 20 3440 6800
Samantha Harrison, Jen Boorer
Glossary
Ag The chemical symbol for silver.
------------------- ------------------------------------------
Competent Persons' Competent Persons' Report, as
Report or CPR defined by the AIM Note for Mining
and Oil & Gas Companies - June
2009.
------------------- ------------------------------------------
Cut-Off A grade level below which the
material is not "ore" and considered
to be uneconomical to mine and
process. The minimum grade of
ore used to establish resources.
------------------- ------------------------------------------
Indicated Mineral An 'Indicated Mineral Resource'
Resource is that part of a Mineral Resource
for which tonnage, densities,
shape, physical characteristics,
grade and mineral content can
be estimated with a reasonable
level of confidence. It is based
on exploration, sampling and testing
information gathered through appropriate
techniques from locations such
as outcrops, trenches, pits, workings
and drillholes. The locations
are too widely or inappropriately
spaced to confirm geological and/or
grade continuity but are spaced
closely enough for continuity
to be assumed.
------------------- ------------------------------------------
Grade The metal content in percent.
------------------- ------------------------------------------
Mineral Resource A concentration [or occurrence]
of material of economic interest
in or on the Earth's crust in
such form, quality and quantity
that there are reasonable and
realistic prospects for eventual
economic extraction. The location,
quantity, grade, continuity and
other geological characteristics
of a Mineral Resource are known,
estimated from specific geological
evidence and knowledge, or interpreted
from a well constrained and portrayed
geological model. Mineral Resources
are subdivided, in order of increasing
confidence in respect of geoscientific
evidence, into Inferred, Indicated
and Measured categories.
------------------- ------------------------------------------
JORC The Joint Ore Reserves Committee:
The Australasian Code for Reporting
of Exploration Results, Mineral
Resources and Ore Reserves, as
published by the Joint Ore Reserves
Committee of The Australasian
Institute of Mining and Metallurgy,
Australian Institute of Geoscientists
and Minerals Council of Australia.
------------------- ------------------------------------------
Pb The chemical symbol for lead.
------------------- ------------------------------------------
V(2) O(5) The chemical symbol for vanadium
oxide.
------------------- ------------------------------------------
Zn The chemical symbol for zinc.
------------------- ------------------------------------------
This information is provided by RNS
The company news service from the London Stock Exchange
END
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