TIDMTHR
RNS Number : 0515V
Thor Mining PLC
09 December 2021
9 December 2021
Thor Mining PLC
Commencement of Copper Recovery Trials
Kapunda Copper ISR Project, South Australia
The directors of Thor Mining Plc ("Thor") (AIM, ASX: THR, OTCQB:
THORF) are pleased to advise that a tracer test and in-situ
lixiviant trials have commenced at the Kapunda Copper ISR Project
in South Australia.
EnviroCopper Ltd ("EnviroCopper" or "ECL"), in which Thor holds
a 30% equity interest, has completed the installation of test well
arrays and has commenced in-situ recovery trials ("ISR"), including
tracer and push pull test work. These tests are the final
hydrometallurgical assessments before ECL commences Site
Environmental Lixiviant Trials (SELT).
The purpose of lixiviant trials, or 'push pull tests', is to
assess the solubility of copper mineralisation, and therefore
copper recovery, using a specially designed solution called a
lixiviant under in-situ conditions. The trial is to be undertaken
in two stages. The first stage involves injecting and extracting a
tracer solution (Sodium Bromide - NaBr) from the same well to
demonstrate hydraulic connectivity between wells and the
environmental monitor well network. This is followed by injecting
and extracting lixiviant from the same well to test copper
solubility from the mineralisation.
The trials are anticipated to take three to four weeks.
Nicole Galloway Warland, Managing Director of Thor Mining,
commented:
"These in-situ lixiviant trials are a critical step in the
assessment of the ISR process in determining the copper solubility
hence recovery from the Kapunda copper mineralisation.
This is a significant milestone for the Kapunda ISR Project,
which Thor is delighted to be a part of.
I would also like to congratulate and acknowledge the efforts of
the ECL team on winning this year's award for Innovation and
Collaboration in the Resources Sector by the Department of Energy
and Mining, South Australia for the Kapunda Copper ISR
Project."
https://www.energymining.sa.gov.au/premiers_awards_in_energy_and_mining
About Kapunda and EnviroCopper
The Kapunda ISR Copper Project is located approximately 90
kilometres north north-east of Adelaide in South Australia (Figure
1).
Thor holds a 30% interest in EnviroCopper, which in turn holds
rights to earn up to a 75% interest in the mineral rights over
metals which may be recovered via ISR contained in the Kapunda
deposit from Australian listed company, Terramin Australia Limited
("Terramin" ASX:TZN) (AIM:THR Announcement 11 November 2020).
For detail of the ISR process, investors are invited to view the
EnviroCopper website:
https://www.envirocopper.com.au/
Figure 1: The Tenement & Prospect Location Plan may be
viewed by the following link:
https://www.thormining.com/sites/thormining/media/maps/17-007-1b-kapunda-alford-location.jpg
Lixiviant Trials - Push Pull Test
The purpose of lixiviant trials is to test the solubility of
copper mineralisation using a lixiviant under in-situ conditions.
The trial involves injecting and extracting tracer and/or lixiviant
from the same well. Details of tasks/stages are as follows:
1. The installation of test well array and well house, which is
now completed (Figure 2 and 3):
o One push-pull well screened across mineralisation
o Two observation wells - oriented along main line of lithology/structure
o Compliance monitoring wells located down gradient - nominally
25 to 50m from push pull well, screened across the same interval as
injection and extraction wells
2. Well connectivity 'tracer' test using sodium bromide (NaBr).
The tracer test is designed to demonstrate hydraulically the
connectivity between the tracer test well and the observation and
monitoring wells. The tracer test has commenced, with monitoring
every 2 hours and is anticipated to be completed within 24-48
hours.
3. A lixiviant injection and extraction 'push pull' test
including the installation of a well house (Figure 3). This is
designed to test the solubility of copper in lixiviant under
in-situ conditions.
o Drain lixiviant to injection well under gravity. Maintain
water level in well at least 2m below ground surface
o Allow lixiviant to react with rock. 12 hourly samples for pH and copper.
o Reaction is complete when parameters are stable. Estimated to take up to 14 days.
4. Well rehabilitation. Restore Groundwater to baseline conditions
o Extract lixiviant from well until water quality returns to
baseline conditions. Water is disposed of offsite at an approved
EPA facility.
Key outcomes anticipated from lixiviant trials:
1. Hydraulic connectivity between wells
2. Copper solubility and recovery
3. Establish lixiviant and time parameters for design of the
Site Environmental Lixiviant Trials (SELT).
The trials are anticipated to take three to four weeks to
complete.
Figure 2 : Lixiviant Push Pull Layout may be viewed by the
following link:
https://www.thormining.com/sites/thormining/media/maps/push-pull-layout.png
Figure 3 : Photos of well house may be viewed by the following
link:
https://www.thormining.com/sites/thormining/media/maps/wellhouse.jpg
Next Step
Based on the results of the lixiviant trials, the Site
Environmental Lixiviant Trials will be designed and permitted.
A scoping study is currently underway for the Kapunda ISR
project including the optimal copper processing options and
saleable copper product.
This announcement is authorised for release to the market by the
Board of Directors.
- Ends -
For further information on the Company, please visit
www.thormining.com or contact the following:
Thor Mining PLC
Nicole Galloway Warland, Managing Director Tel: +61 (8) 7324 1935
Ray Ridge, CFO / Company Secretary Tel: +61 (8) 7324 1935
WH Ireland Limited (Nominated Adviser and Tel: +44 (0) 207 220 1666
Joint Broker)
Jessica Cave / Darshan Patel / Megan Liddell
Jasper Berry (Corporate Broking)
SI Capital Limited (Joint Broker) Tel: +44 (0) 1483 413
500
Nick Emerson
Yellow Jersey (Financial PR) thor@yellowjerseypr.com
Sarah Hollins / Henry Wilkinson Tel: +44 (0) 20 3004 9512
Competent Persons Report
The information in this report that relates to Exploration
Results and the Estimation and Reporting of Mineral Resource
Estimation is based on information compiled by Nicole Galloway
Warland, who holds a BSc Applied geology (HONS) and who is a Member
of The Australian Institute of Geoscientists. Ms Galloway Warland
is an employee of Thor Mining PLC. She has sufficient experience
which is relevant to the style of mineralisation and type of
deposit under consideration and to the activity which she is
undertaking 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'. Nicole Galloway
Warland consents to the inclusion in the report of the matters
based on her information in the form and context in which it
appears.
Forward Looking Statements
This document may contain certain forward-looking statements.
Forward-looking statements include, but are not limited to,
statements concerning Thor Mining PLC current expectations,
estimates and projections about the industry in which Thor
operates, and beliefs and assumptions regarding Thor's future
performance. When used in this document, words such as
"anticipate", "could", "plan", "estimate", "expects", "seeks",
"intends", "may", "potential", "should", and similar expressions
are forward-looking statements. Although Thor believes that its
expectations reflected in these forward-looking statements are
reasonable, such statements are subject to known and unknown risks,
uncertainties and other factors, some of which are beyond the
control of Thor and no assurance can be given that actual results
will be consistent with these forward-looking statements
Updates on the Company's activities are regularly posted on
Thor's website www.thormining.com , which includes a facility to
register to receive these updates by email, and on the Company's
twitter page @ThorMining.
About Thor Mining PLC
Thor Mining PLC (AIM, ASX: THR; OTCQB: THORF) is a diversified
resource company quoted on the AIM Market of the London Stock
Exchange, ASX in Australia and OTCQB Market in the United
States.
The Company is advancing its diversified portfolio of precious,
base, energy and strategic metal projects across USA and Australia.
Its focus is on progressing its copper, gold, uranium and vanadium
projects, while seeking investment/JV opportunities to develop its
tungsten assets.
Thor owns 100% of the Ragged Range Project, comprising 92 km(2)
of exploration licences with highly encouraging early-stage gold
and nickel results in the Pilbara region of Western Australia, for
which drilling is currently underway.
At Alford East in South Australia, Thor is earning an 80%
interest in copper-gold deposits considered amenable to extraction
via In Situ Recovery techniques (ISR). In January 2021, Thor has
announced an Inferred Mineral Resource Estimate of 177,000 tonnes
contained copper & 71,000 oz gold(1).
Thor also holds a 30% interest in Australian copper development
company EnviroCopper Limited, which in turn holds rights to earn up
to a 75% interest in the mineral rights and claims over the
resource on the portion of the historic Kapunda copper mine and the
Alford West copper project, both situated in South Australia, and
both considered amenable to recovery by way of ISR.(2)(3)
Thor holds 100% interest in two private companies with mineral
claims in the US states of Colorado and Utah with historical
high-grade uranium and vanadium drilling and production
results.
Thor holds 100% of the advanced Molyhil tungsten project,
including measured, indicated and inferred resources , in the
Northern Territory of Australia, which was awarded Major Project
Status by the Northern Territory government in July 2020. Diamond
drilling is currently underway to test potential extension to
mineralisation.
Adjacent to Molyhil, at Bonya, Thor holds a 40% interest in
deposits of tungsten, copper, and vanadium, including Inferred
resource estimates for the Bonya copper deposit, and the White
Violet and Samarkand tungsten deposits.
Notes
(1)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20210127-maiden-copper.gold-estimate-alford-east-sa.pdf
(2)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20172018/20180222-clarification-kapunda-copper-resource-estimate.pdf
(3)
www.thormining.com/sites/thormining/media/aim-report/20190815-initial-copper-resource-estimate---moonta-project---rns---london-stock-exchange.pdf
(4)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20210408-molyhil-mineral-resource-estimate-updated.pdf
(5)
www.thormining.com/sites/thormining/media/pdf/asx-announcements/20200129-mineral-resource-estimates---bonya-tungsten--copper.pdf
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END
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