METALLOGENIC MECHANISM OF GOLD METALLOGENIC SERIES IN LATE PALEOZOIC TULASU VOLCANIC BASIN OF WESTERN TIANSHAN

In Late Paleozoic Tulasu volcanic basin of Western Tianshan, the Axi gold deposit, Yiermande-Jilande gold deposit and Tawuerbieke gold deposit were formed in different types, because of the differences in volcanic products, structure, fluid and mineralization environment. These deposits composed a metallogenic series, with relativity, distinction and regularity in metallogenic mechanism. In this area, the kaolinite-barite type (silicated rock type) of gold deposits were formed in the early stage of volcanism; while the adularia-sericite type, in the late stage; the porphyry type, in post-volcanism activity.