TIDMGSCU
RNS Number : 5914A
Great Southern Copper PLC
23 January 2024
THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION AS STIPULATED
UNDER THE UK VERSION OF THE MARKET ABUSE REGULATION NO 596/2014
WHICH IS PART OF ENGLISH LAW BY VIRTUE OF THE EUROPEAN (WITHDRAWAL)
ACT 2018, AS AMED. ON PUBLICATION OF THIS ANNOUNCEMENT VIA A
REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO
BE IN THE PUBLIC DOMAIN.
23 January 2024
Great Southern Copper plc
("GSC" or the "Company")
Scout Drilling Completed at Abundante Prospect, Especularita
Visible copper mineralisation identified in four holes at
Abundante and drill programme commences at Teresita, targeting
high-grade copper-gold ("Cu-Au") vein breccia system
Great Southern Copper plc (LSE: GSCU), the company focused on
copper-gold and lithium exploration in Chile, is pleased to
announce that the scout drilling programme at the Abundante
prospect has been completed and drilling has commenced at the
Teresita prospect. Both prospects are within the Company's
Especularita Cu-Au project located in the coastal metallogenic belt
of northern Chile.
Highlights:
-- Six scout reverse circulation ("RC") holes completed for a
total of 484m at Abundante, targeting breccia-hosted high-grade
copper mineralisation
-- Copper mineralisation visually identified in four holes targeting the breccia
-- All RC samples for the Abundante programme have been despatched for assaying
-- Scout drilling has commenced at Teresita targeting high-grade Au-Cu vein breccias
Six RC drill holes have been completed at the historical
Abundante copper mine where rock chip samples collected by the
Company from mine walls and waste dumps returned values up to 3.39%
Cu and 0.15g/t Au in tourmaline breccia(1,2) . A total of 445 drill
chip samples were collected and have been sent to ALS Laboratories
for assay.
The scout drilling programme has now progressed to the Teresita
prospect where RC holes are targeting high-grade Au-Cu
mineralisation associated with quartz-carbonate vein-breccias. The
Teresita quartz-carbonate vein-breccia system has a cumulative
strike length over 5km and rock chip samples have returned grades
up to 13.7g/t Au(3) and 7.22% Cu(4) .
Sam Garrett, Chief Executive Officer of Great Southern Copper,
said: "Preliminary target-concept drilling is now completed for the
Abundante mine prospect where the Company is targeting high-grade
copper associated with tourmaline breccia. All of the drill chip
samples are at the laboratory and we look forward to updating the
market on the results when they become available. The drilling has
provided an effective first-pass test of the target with copper
mineralisation visible in all holes targeting the breccia and, once
assays are received, we will be in a position to plan the next
phase of work.
"We are also excited to now have begun our second scout RC
drilling programme at Especularita, with drilling underway at the
Teresita prospect. The Teresita high-grade Au-Cu vein-breccia
system is a very extensive and exciting target and these holes are
designed to validate the mineralisation style and provide key
information for any proposed follow-up drill programmes."
Abundante scout drilling programme:
Copper mineralisation at the historical Abundante mine is
observed in outcrop as coarse, blebby disseminations associated
with tourmaline-quartz matrix in-filling the fragments of intrusive
breccia. Rock chip samples collected by the Company from the
exposed mine walls and mine dump material have returned assay
grades up to 3.39% Cu and 0.15g/t Au(1) .
Holes ESP23RC001 - 004 all tested the breccia to a depth of
approximately 50 - 100m below surface. Visible oxide and sulphide
copper was variably identified in cuttings from holes RC001, 002,
003 and 004 (Figure 1). Hole RC005 tested the potential for
horizontal strike extension of the breccia to the north and holes
ESP23RC006 and the bottom half of hole 004 tested a magnetic low
anomaly to the east of the outcropping breccia. Disseminated
sulphide (pyrite-chalcopyrite) mineralisation with associated
quartz veinlets has been noted in the chips for the deeper
holes.
Of particular interest are holes RC002 and hole RC004 that both
intersected continuous breccia with visible Cu mineralisation over
10 and 31 metres respectively, before ending in old mine workings
in the case of RC002 and crossing the east bounding fault in the
case of RC004. Copper mineralisation may therefore remain open at
depth.
All samples for the Abundante drill programme comprising 445
drill chip samples plus 80 control samples have been despatched to
ALS laboratories for preparation and assaying.
Figure 1 : Representative RC drill cuttings (chips) from hole
ESP23 RC002, 28-29m, showing abundant copper oxides in tourmaline
matrix breccia. Coin is approximately 2cm in diameter.
Teresita scout drilling programme:
Gold-copper mineralisation at Teresita is associated with a
swarm of structurally-controlled, anastomosing quartz-carbonate
veins and vein-breccias which are mapped over a cumulative strike
length of up to 5km, although the structures have the potential to
be open further along strike. The veins are hosted in diorite and
additional veins may occur where outcrop is obscured by shallow
scree cover. Disseminated chalcopyrite mineralisation (with gold)
is preferentially hosted in quartz vein material which has been
variably overprinted and disrupted (brecciated) by later
carbonate.
Drilling of the first hole at Teresita, ESP24RC007, is currently
in progress targeting high-grade assays from surface rock chip
samples of the Central Vein. Subsequent holes are also planned to
test the Gato Negro and Grossa veins.
Sampling and assaying of RC chip samples:
The RC drilling method employed at Especularita generates
between 35 - 40kg of rock cuttings, or "chips", per metre.
Representative samples for each metre of the cuttings are collected
in large, individually numbered plastic bags, which are then
weighed and transferred to a riffle splitter where they are
separated (or split), and homogenised, three times into two
duplicate samples of approximately 5kg each. GSC personnel then
ticket and label one of the +/-5kg samples using preprinted ticket
books.
Finally, standard reference materials (SRM's or Standards),
blanks, and duplicate samples are inserted into the sample sequence
for the purpose of quality assurance / quality control. The second
+/-5kg sample is used for geological description and stored for
reference. An additional reference selection of cuttings for each
metre is also retained in labelled boxes as a record of the geology
of the drill hole.
At the completion of each hole the representative 5kg samples
are transported as a batch from the field and delivered by Company
employees to ALS Laboratories in Santago or La Serena where they
are prepared for analysis (weighed, dried, crushed and pulverised).
A subsequent 200g split of each sample pulp is then forwarded to
the ALS geochemical laboratory in Lima, Peru, where samples are
assayed for gold (30g fire assay with ICP-AES finish, ALS code
AU-ICP21) and 48 major, base and trace elements by ICP-MS following
a four-acid digest (ALS code ME-MS61).
RC drilling was selected for this initial proof-of-concept stage
as it is faster and cheaper than diamond drilling and allows for
the rapid testing of more targets for the same cost.
Cautionary Note:
The Company cautions that any reported observations of the
occurrence of visible copper in RC drilling chip samples does not
infer any assumptions as to the copper grade of those samples.
Visual estimations of grade are unreliable and are not compliant
with JORC standards. The Company will make full disclosure of
anomalous copper grades once assay results have been received and
validated.
References:
1. RNS 2962G (18 July 2023): Samples up to 3.39% Cu from Abundante Prospect.
2. RNS 6990V (05 December 2023): Scout RC drilling due to commence at Especularita.
3. RNS 5675F (11 July 2023): High grade Cu-Au in rock chip samples from Teresita.
4. RNS 2146H (22 Nov 2022): Early exploration at Especularita
identifies multiple copper targets and completion of drilling at
San Lorenzo.
Enquiries:
Great Southern Copper plc
Sam Garrett, Chief Executive Officer +44 (0) 20 4582 3500
---------------------
SI Capital Limited
---------------------
Nick Emerson +44 (0) 1483 413500
---------------------
Gracechurch Group
---------------------
Harry Chathli, Alexis Gore, Henry
Gamble +44 (0) 20 4582 3500
---------------------
Notes for Editors:
About Great Southern Copper
Great Southern Copper PLC is a UK-listed mineral exploration
company focused on the discovery of copper-gold and lithium
deposits in Chile. The Company has the option to acquire rights to
100% of two projects in the under-explored coastal belt of Chile
that are prospective for large scale copper-gold deposits. In
addition, the Company has the option to acquire rights to 100% of a
lithium project located in the Salar de Atacama district of Chile.
Chile is a globally significant mining jurisdiction being the
world's largest copper producer and the second-largest producer of
lithium.
The two, early-stage Cu-Au projects comprise the San Lorenzo and
Especularita Projects, both located in the coastal metallogenic
belt of Chile which hosts significant copper mines and deposits,
including Teck's Carmen de Andacollo copper mine, and boasts
excellent access to infrastructure such as roads, power and ports.
Significant historical small-scale and artisanal workings for both
copper and gold are readily evident in both exploration project
areas.
The Company's Monti Lithium project is strategically located in
the pre-Andean region of Salar de Atacama which is Chile's premier
lithium-producing region with well-established lithium mining
operations and infrastructure.
Great Southern Copper is strategically positioned to support the
global market for copper and lithium - both critical battery metals
in the clean energy transition around the world. The Company is
actively engaged in exploration and evaluation work programmes
targeting both large tonnage, low to medium grade Cu-Au and Li
deposits as well as high-grade Cu-Au deposits.
Further information on the Company is available on the Company's
website: https://gscplc.com
Competent Person Statement
The information in this announcement that relates to exploration
results is based on and fairly represents information reviewed or
compiled by Mr Sam Garrett, a Competent Person who is a Member of
the Australian Institute of Geoscientists and a Fellow of the
Society of Economic Geologists. Mr Garrett is the CEO and a
shareholder of Great Southern Copper PLC. Mr Garrett has sufficient
experience that is relevant to the styles of mineralisation and
types 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 Garrett has
provided his prior written consent to the inclusion in this
announcement of the matters based on information in the form and
context in which it appears.
This announcement includes information that relates to
Exploration Results prepared and first disclosed under the JORC
Code (2012) and extracted from the Company's previous LSE
announcements as noted, and the Company's Prospectus dated 20
December 2021. Copies of these announcements are available from the
LSE Announcements page of the Company's website:
www.gscplc.com.
The Company confirms that it is not aware of any new information
or data that materially affects the information included within the
Prospectus dated 20 December 2021.
Forward Looking and Cautionary Statements
Some statements in this announcement regarding estimates or
future events are forward-looking statements. They include
indications of, and guidance on, future earnings, cash flow, costs
and financial performance. Forward-looking statements include, but
are not limited to, statements preceded by words such as "planned",
"expected", "projected", "estimated", "may", "scheduled",
"intends", "anticipates", "believes", "potential", "predict",
"foresee", "proposed", "aim", "target", "opportunity", "could",
"nominal", "conceptual" and similar expressions. Forward-looking
statements, opinions and estimates included in this report are
based on assumptions and contingencies which are subject to change
without notice, as are statements about market and industry trends,
which are based on interpretations of current market conditions.
Forward-looking statements are provided as a general guide only and
should not be relied on as a guarantee of future performance.
Forward-looking statements may be affected by a range of variables
that could cause actual results to differ from estimated or
anticipated results and may cause the Company's actual performance
and financial results in future periods to materially differ from
any projections of future performance or results expressed or
implied by such forward-looking statements. So, there can be no
assurance that actual outcomes will not materially differ from
these forward-looking statements.
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