摘要
墨江金矿的同位土地球化学特征、成矿元素组合和包裹体成分表明：成矿物质主要未源于金厂蚀变起基性岩体，成矿热液是深源流体、岩浆水和大气降水混合的产物。成矿期深部富矿化剂流体沿断裂上升并与地下水混合，从侵入体及围岩中淋滤出了成矿物质。在迁移过程中，随着地球化学条件的改变，金在有利部位沉淀富集形成矿床。墨江金矿床底混合热液改造型矿床。
The isotope geochemical characteristics, ore-forming elements association and the composition of fluid inclusions of the Mojiang gold deposit show that the metallogenic material mainly comes from altered ultrabasic rocks, and the ore-forming solution is derived from fluids at depth and magmatic water mixed with meteoric water. The ore-forming process could be described as follows: in the mineralization process gold was leached from the intrusive body and its surrounding rocks by circulating water mixed with mineralizer-rich fluids along the fault at depth, and then the gold in the fluids was precipitated in favorable locations with changing geochemical condition. It is a deposit of the mixed hydrothermal-reworked type.
出处
《地质地球化学》
CSCD
北大核心
1998年第4期15-20,共6页
Geology-Geochemistry
基金
国家自然科学基金
关键词
成矿流体
矿床成因
金矿床
同位素地球化学
isotope geochemistry
material source
ore fluid
metallogenic model
Yunnan
