Marmota Ltd has drilled 10 aircore holes in an 89-hole program to test titanium-rich heavy mineral sands with up to 10.1pc titanium dioxide at Muckanippie in SA.. Marmota Ltd has drilled 10 aircore holes in an 89-hole program to test titanium-rich heavy mineral sands with up to 10.1pc titanium dioxide at Muckanippie in SA.. Business / Companies Sydney Morning Herald – Business