云南宁蒗地区巴打湾沉积-构造改造型重晶石矿床地质特征  

GUANTIIAN EPITHERMAL VEIN PYRITE DEPOSIT: GEOCHEMISTRY AND MINERALIZATION

作　　者：胡受权[1,2] 郭文平[1,2] 

机构地区：[1]西南石油学院博士后流动站 [2]四川省自贡市盐业地质钻井大队

出　　处：《化工矿产地质》1997年第1期11-18,共8页Geology of Chemical Minerals

摘　　要：云南宁蒗地区巴打湾重晶石矿床是原生沉积重晶石矿受喜山期强烈的构造运动和岩浆活动的影响，在固相条件下改组和改造，重新富集而形成的。区内ＮＮＷ向构造带是主干控矿构造体系，它控制着改造型矿体的形态、产状及空间分布。改造型矿床的形成还受原矿性质控制。本区沉积构造改造型重晶石矿床特征具典型的纵向、横向、垂向三维空间分带变化规律。The Guantian pyrite deposit is explained by characteristics of fluid inclusions and isotope composition as a type of epithermal vien pyrite deposit with minerlizing pressure below 100 bar,fluid temperature below 220 240C, pH 4.4 5.8,Eh -0.5 and f O 2 below 10 -25 bar.Pyrite was caused by filling metasomatism,compared with other elements which owed their pricipitation to the mixture of different hydrothermal solutions in the course of migration. Meteoric water took a two fold role in mineralization.

关 键 词：重晶石矿床 地质特征 成矿规律 沉积成矿 

分 类 号：P619.251[天文地球—矿床学]