Ni-Co Bearing Laterites from Halmahera Island (Indonesia)

Eastern Indonesia, including the island of Halmahera, is a region with high mineral potential, particularly Ni-Co, Au-Cu, and Ag ores, which are globally important critical source raw materials (CRMs). The research was conducted within framework scientific cooperation between Faculty Geology, University Warsaw (Poland), PT Halmahera Resources Percasa Ltd. (Jakarta, Indonesia) Between years 2009 2011, 42 boreholes were drilled using an impact system (up to 15 m below surface) 3 test pits 8 surface). presence laterite deposit containing Ni-Co mineralization identified on license area. resources estimated in accordance JORC Code, cut-off grade Ni ≥ 0.5%, equaling 185,510 t 17,747 Co, stock material amounting 14.8 million average content 1.00% 0.13% Co. ore has mixed character. To date, studies have shown dominance oxide ore, but saprolite composed magnesium silicates also significant amount. (limonite) bound goethite manganese minerals, while case silicate (saprolite) it occurs locally form veins as well zonally weathered serpentinites. Cobalt almost entirely related Mn minerals that occur lower zone. It been found both serpentinites harzburgites (and possibly lherzolite) parent rocks for deposit.