The Board of Thor Mining Plc (“Thor” or the “Company”) (AIM, ASX: THR), is pleased to announce successful laboratory test work results for the extraction of copper from Kapunda Copper Project core samples, in partnership with Environmental Copper Recovery SA Pty Ltd (“ECR”).
· Up to 78% copper recovery within 2 days of bottle roll leach testing;
· Extraction agent (lixiviant) was glycine, a biodegradable amino acid, elsewhere used in the food and pharmaceutical industries;
· Other lixiviants scheduled for near-term testing;
· Testwork activities funded under the recently announced Australian Commonwealth Research Centre Project Grant (CRC-P).
Mick Billing, Executive Chairman, commented:
“Very pleasing initial recovery outcomes from the laboratory testwork on Kapunda core. While laboratory conditions are not a full simulation of field processing, it is a very positive result.”
“The success with glycine, a very benign substance, is an important step forward. Other lixiviants are also being trialled, and we look forward to these results when available.”
“Importantly, also, ECR will be well placed from this work to identify and assess many other projects for which ISR may be an economic extractive solution.”
“We look forward to providing further regular updates on this exciting venture.”
A series of bottle roll tests (standard recovery testwork technique for heap leaching and in-situ recovery projects) over seven days was conducted on four samples by Cooperative Research Centre partner CSIRO. The lixiviant used was glycine, an amino acid, typically used in food and pharmaceutical industries.
Sample testwork details Table A:
Core samples for the program were selected from the South Australia government core library, which hosts historical core from previous exploration programs.
A photo showing dissolved copper from each of these samples can be viewed via;
On 1 August 2017, Thor announced an agreement to earn up to 60% of a newly incorporated private Australian company, Environmental Copper Recovery SA Pty Ltd, initially via convertible loan notes of up to A$1.8 million, which will be used to fund field test work and feasibility activities at Kapunda over the next 3 years.
In turn ECR has entered into an agreement to earn, in two stages, up to 75% of the rights over metals which may be recovered via in-situ recovery (“ISR”) contained in the Kapunda deposit from Australian listed company, Terramin Australia Limited (“Terramin” ASX: “TZN”).
For detail of the In-situ Recovery process, investors are invited to view the ECR website; https://www.envirocopper.com.au/.
In February 2018 Thor announced an Inferred JORC Resource Estimate for the Kapunda project, containing 119,000 tonnes of contained copper considered amenable to In-situ Recovery techniques.
For detail of the Resource Estimate Announcement, investors are invited to view the Thor website: http://www.thormining.com/-/thor/lib/docs/asx%20releases/20180212%20ASX%20Kapunda%20Resource.pdf.
Subsequently, on 30 July 2018, the Company announced details of a CRC-P (Cooperative Research Centre) grant to the value of A$2.85 million from the Australian Commonwealth Government for the Kapunda In-Situ Copper and Gold Recovery Trial.
We look forward to providing further updates on this exciting project as news becomes available.
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