Operations

Geology

High-grade nickel sulphide deposits at Lanfranchi occur as ribbon like shoots at the base of high magnesium komatiite lava flows or channels.

The shoots and high-magnesium lava flows occupy channel structures developed in the underlying Lunnon (footwall) basalt. Above the high-magnesium komatiite flows is a thick sequence of progressively less magnesium-rich komatiite flows. Ten channel structures are recognised at Lanfranchi of which six have been mined historically.