A bit of history1 Apr 2023 18:23
Anglo pulled out in the early 2000’s you can read about the reasons here:
https://www.nytimes.com/2002/01/25/business/mining-giant-set-to-depart-from-zambia.html
Essentially due to falling copper price and inherited poor mining infrastructure.
They were in a JV with Equinox Minerals exploring large swathes of the Copperbelt which included the Kabompo dome and the licenses of which Arc is now the majority owner. When Anglo pulled out of Zambia they terminated the JV giving Equinox a 100% interest in the licenses, but retained a net smelter payment of 1.5% and a ‘claw back option’ to buy back 70% of the interest in the event of a 3 million tonne copper resource being found (I wonder what happened to that?).
https://www.asx.com.au/asxpdf/20050615/pdf/3r6pd108lws5b.pdf
Equinox eventually went on to discover and develop the nearby Lumwana mine, the was bought by Barrick Gold in 2011 for US$7.4 billion. I guess at some stage they must have relinquished some of the exploration licenses in order to focus on Lumwana but I haven’t seen any evidence of what happened to them after that.
https://www.bbc.co.uk/news/business-13187997
A bit of an aside, I found these notes from Equinox Resouces from 2000, when they were drilling at Fwiji and Kalaba:
“The Fwiji and Kalaba prospects were the focus of exploration at Kabompo, where work included regional geochemical sampling, ground geophysics, re-sampling of historic core and two programs of drilling. North of the Kalaba Prospect work included ground geophysics (reconnaissance IP traversing), which has defined a low resistivity anomaly coincident with copper soil anomalism associated with a Lower Roan shale horizon. Re-sampling of several historic RST diamond holes drilled at Fwiji returned significant silver assays in addition to the known copper mineralisation, the best being MK627A :
13.60m (63.20 - 76.80m) at 39.8 g/t Ag. Further investigation of this silver mineralization is planned. A 64 hole (2000m) RAB drilling program was completed to test the shallower portions of the Fwiji prospect, in conjunction with an 8 hole (1077m) RC drill program testing the deeper down dip and down plunge extensions of this mineralisation. RST intersected copper mineralisation by diamond drilling in the 1970's with intercepts such as MK628, 10.60m of 1.25% Cu at Fwiji. The RAB results defined minor copper anomalism and an interesting zone of Upper Roan carbonate hosted copper-lead-zinc
mineralisation, with a best intercept of KAB00RA057 : 8m (20-28m) of 0.12% Cu, 1.28% Pb and 0.43% Zn. The RC drilling intersected visible sulphides, including copper sulphides in most holes and assay results are expected next Quarter.”