晋东北支家地银矿床成矿特征及成因分析

支家地矿床是以银为主，伴生铅、锌的大型独立银矿床。矿体呈脉状、透镜状产于燕山期石英斑岩体边部的隐爆角砾岩中，受隐爆角砾岩及其下部的断裂构造控制。根据矿石的同位素特征和包裹体特征可知，成矿热液主要为岩浆热液，并有地层热液的混入，热液的盐度较低，成矿压力不大，且成矿是在中低温、弱碱性、弱还原条件下进行的。矿床属与次火山岩隐爆作用有关的浅成低温热液银（ 多金属） 矿床

METALLOGENIC FEATURES AND GENESIS OF THE ZHIJIADI SILVER DEPOSIT IN NORTHEASTERN SHANXI

Zhijiadi is a large independent silver deposit. The orebodies, as veins and lenses, occur in the cryptoexplosion breccia on he margin of quartz porphyry. Based on the isotope and fluid inclusion geochemistry, it is suggested that the fluid was derived from magma and mixing of water from strata. It was formed at low salinity and pressure. The metallogenic conditions are summarised as medium-low temperature, weak alkalinity, and weak reduction. It is an epithermal one related to subvolcanic rocks.