The noble-metal mineralization of the Kaalamo igneous complex located in Karelia is identified as syngenetic and epigenetic types which differ in the physic-chemical parameters (Ò, Ð, logfS2) of conditions of formation and mineralogical and geochemical characteristics. Both types of ore were found to contain over 40 noble-metal phases dominated by the minerals of the Pd-Bi-Te system. The composition of its minerals for a syngenetic type of mineralization is dominated by tellurium and for a epigenetic type bismuth. The main prospecting signs of noble-metal mineralization are abundant clusters of sulphides (chalcopyrite, pyrrhotite) in metapyroxenites, contact zones of metapyroxenites with other igneous differentiates and and carbonaceous shales and the occurrence of shear-zones and low-temperature metasomatic rocks.
minsoc.ru
Presentations
NEW !!! 
minsoc.ru ()