METALLOGENETIC AND GEOLOGICAL FEATURES OF WUFENG-WUXINGSHAN GOLD DEPOSIT IN JILIN PROVINCE

Wufeng-Wuxingshan gold deposit which occured in Mesozoic continental volcanic rock was a type of epi-hydrothermal deposit. The volcanic rock of Jingouling formation of Upper Jurassic system is the main source bed.Ore bodies are controlled by the ring and radiating fissures of the volcanic mechanism,the inner and outer contact zones of subvolcanic veins. Alkali-feldspar granite which intruded into the basal position of Jingouling formation provided the main thermal source for gold deposit Metallogenesis had mainly operated under low pressure-temperature, neutsal medium,weak oxidizing and ultra-stipergenesis conditions, Gold and silver relatively enriched in the following parts:that is①the upper part of the body;②the turning corner expanding part and the convergence of branchings of the ore vein;③strongly sericitized and adularized aItered rock;④containing fine-grained pyrite calciteqtiartz veins;⑤the concentric part of argentite.