The geology of the platinoid deposits assocated with mafic intrusive rocks on the southwestern margin of the Yangtze platform, southwestern China

The traditional platinoid mineral resources are referred to as the platinoid mineral resources associated with the mineralization of mafic magmas. The continental rifting during the Variscan orogeny within the supercrustal deep-seated fault zones on the southwestern margin of the Yangtze platform, southwestern China was (responsible) for the upwelling and emplacement of the mafic (tholeiitic) magmas from the upper mantle. The (platinum)-(bearing) basic and ultrabasic intrusive complexes are thus believed to be the products originated from the tholeiitic magmatic differentiation in the supercrustal (deep)-(seated) fault zones and continental rifts during extensional stages, and consist dominantly of the following types:peridotite type, olivine (pyroxenite)-(gabbro) type, (peridotite)-(pyroxenite)-(gabbro) type, olivine (pyroxenite)-(pyroxenite)-(gabbro)-(syenite) type, (peridotite)-(olivine) (pyroxenite)-(pyroxenite) type. The spatial distribution of the platinum deposits is apparently constrained by the (deep)-(seated) faults. Main mineralization types of the platinoid deposits in the study area include the late magmatic (segregation)-(liquation)-(hydrothermal) and (segregation)-(hydrothermal) types.