摘要
耀岭河群石门沟组的变质火山岩是有利产金的层位。金的成矿温度约210°～230℃,盐度4.2～12.3wt％。金矿成矿作用经三个阶级的流体活动。成矿流体的组成,以岩浆水和变质水为主,其次是大气降水,化学类型为K^+～Na^+—Ca^(++)—Mg^(++)—F^-—Cl^-型。同位素特征反映成矿物质来自地壳深部。成矿物质以金硫(氯)络合物形式迁移,部分金呈硅质凝胶迁移。金矿床(点)的产出受构造控制。
The metavolcanic rocks in Shimengou Formation of Yaolinghe Group bear gold ore, which are formed at 210—230℃ with salinity of 4.2—12.3 wt% and have undergone three stages of fluid activities. The ore—forming fluid is mainly composed of magmatic water and metamorphic water with minor atmospheric water, whose chemical type is of K^-—Na^+—Ca^(++)—Mg^(++)—F^-—Cl^-. Its isotopic values reflect that most of the ore—forming materials migrate from the deep crust in Au—S complex, and others migrate in siliceous gel. The occurence of gold ore is controlled by structure.
出处
《湖北地质》
1994年第1期50-57,88,共9页
基金
地矿部八五期间秭巴重点攻关项目二级课题(85-01-018-08)部分内容阶段性成果
关键词
耀岭河群
变火山岩
金矿
成矿流体
Yaolinghe Group, Metavolcanic rocks, Gold ore, Ore—forming fluid
