RE: Massive8 Feb 2018 13:02
From the 1-8-17 RNS:
MB:
"Kapunda is not an exploration project where we hope to find mineralisation. The presence of copper is well documented with significant prior production, and substantial historical drilling. The opportunity at Kapunda is to test, at modest cost, the potential for insitu recovery to extract the copper mineralisation. While the characteristics of the deposit, determined from reviewing historical drilling results, appear suitable for this style of extraction, hydrogeological pump testing is required for validation."
Kapunda Copper Deposit
"On the edge of the town of Kapunda (90 minutes north of Adelaide) is the historic Kapunda Copper mine, the site of the birthplace of the Australian commercial copper mining history. Copper was mined from Kapunda for more than 30 years, until 1877 with tributors subsequently working it through to 1912.
The Kapunda copper deposit has been comprehensively drill tested over many years (Ref Figures 2 &3), however a JORC compliant resource estimate has not been published. The protocol for estimation, and reporting, of resources with potential for exploitation via insitu-recovery has a number of additional steps compared with conventional mining and processing, and this procedure is currently in progress..."
Copper In-situ Recovery
"ISR is a common extraction method in uranium production (more than 50% of current world uranium production is via ISR), and has also been successful, where conditions are suitable, in copper production, in the USA and Russia. ISR production of copper at the San Manuel mine in the USA lasted 15 years and amounted to over 250 million pounds of copper during its lifetime.
ISR uses solutions (lixiviants) pumped through boreholes into the mineralized body, to dissolve (leach) the metals followed by extraction from nearby boreholes (ref Figure. 4). It requires that the minerals be amenable to chemical recovery.."
GK.