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Cobre in Botswana is WhyAfrica’s Pick Of The Week

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Cobre’s Ngami Copper Project in the Kalahari Copper Belt (KCB) of Botswana is WhyAfrica’s Pick Of The Week. In picture is Cobre’s exploration drill rig when WhyAfrica visited the Ngami site during our 2022 WhyAfrica Road Trip. Image credit: Leon Louw for WhyAfrica

Cobre in Botswana is WhyAfrica’s Pick Of The Week

Cobre in Botswana is WhyAfrica’s Pick Of The Week

Cobre’s Ngami Copper Project in the KCB of Botswana is WhyAfrica’s Pick Of The Week.

Last week Australian listed Cobre announced that the company had successfully completed the first phase of hydrogeological test work on the Ngami Copper Project (NCP) in the Kalahari Copper Belt (KCB) in Botswana.

The programme was carried out to determine the viability of an In-Situ Copper Recovery (ISCR) process for extraction of copper-silver from strike.

ISCR a gamechanger?

According to Adam Wooldridge, Cobre’s CEO, the ISCR extraction method for copper-silver beneficiation could be a game changer in the KCB.

“Having our desktop work successfully validated with in-field tests marks a pivotal advancement in our journey to developing the ISCR project potential. Given the scale of the target, proving up a low cost, environmentally friendly extraction method for copper-silver beneficiation will be a game changer for the company, local communities, and greater Kalahari Copper Belt,” says Wooldridge.

An enhanced permeability zone

According to Cobre, initial short-term hydraulic tests conducted on recently completed production and monitoring wells have verified the presence of an enhanced permeability zone within a representative portion of the copper mineralised compartment.

“This zone is bounded by low permeability footwall and hanging wall competent “seal” rocks.

“In addition, production well PW001, drilled down the main mineralised fracture zone, has intersected (open-ended) 78m at 0.59% Copper from 187 to 265m, demonstrating the continuity and depth extent of copper mineralisation at the target.

Second phase of injection tests to commence

According to Wooldridge a second phase of long-term pumping and injection tests designed to evaluate aquifer characteristics over a greater distance for longer period will now commence.

“The results represent a considerable milestone for the company, providing demonstrable support for the potential to inject a leaching fluid into the orebody.”

Pumping test design and objectives

The next test phase entails conducting a series of pumping and injection tests utilising a specific production well.

The pumping test aims to evaluate aquifer characteristics, including permeability and storage properties, while the injection test seeks to determine the aquifer’s water-receiving capacity.

Throughout these tests, the monitoring of groundwater levels in surrounding monitoring wells will offer insights into fluid movement within the mineralised compartment, as well as lateral movement through the footwall and hanging wall competent “seal” rocks.

The results obtained will provide valuable insights into aquifer permeability, anisotropy, extent, and preferential groundwater flow directions. This comprehensive understanding of the hydrogeological system will help assess the viability of an in-situ recovery program.

WSP Australia have been engaged to provide oversight and modelling of the pumping-injection test results.

Cobre in Botswana is WhyAfrica’s Pick Of The Week

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Cobre in Botswana is WhyAfrica’s Pick Of The Week

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