蚀变岩岩石质量平衡及主要成分变异序列——以河南西峡石板沟金矿热液蚀变岩为例  

Major composition variation sequences and rock mass balance of altered rocks:As evidenced by hydrothermal altered rocks of Shibangou gold deposit in Xixia, Henan

作　　者：魏俊浩[1] 刘丛强[2] 张德会[1] 王思源[1] 刘伟[1] 

机构地区：[1]中国地质大学,武汉430074 [2]中国科学院地球化学研究所,贵阳550002

出　　处：《地球化学》1999年第5期479-486,共8页Geochimica

基　　金：国家杰出青年科学家基金!( 编号:049625304);国家科技部"九五"攀登预选项目!( 编号:95预备39)

摘　　要：河南西峡石板沟金矿为一典型的蚀变岩型金矿， 近ＮＷ 向的剪切带为主要控矿因素。近矿蚀变岩类型主要有硅化、黄铁矿化、绢云母化、钾长石化，且具有分带特征。按照蚀变分带进行了系统的岩石学和岩石化学采样， 研究了蚀变岩的岩石质量平衡、体积变化（ｆｖ ＝ ９７ ．２４％ ～７１．６３％ ） 和主成分变异，讨论了活泼元素和惰性元素在岩石蚀变过程中的变化规律，建立了主成分变异序列。Shibangou gold deposit in Xixia, Henan, is a typical altered rock type gold deposit. Shear zones in near NW direction is the key ore controlling structures. Alteration types near the ore bodies, such as silification, pyritization, sericitization, K feldspar alteration, have zoning features. Petrological and petrochemical samples of altered rocks near the ore bodies have been collected systematically based on alteration zoning. Mass balance, volume change (fv=97.24%～71.63%) and major element variation sequences of altered rocks have been researched. Varied laws of mobile, non mobile elements in the process of rock alteration have been discussed in this paper.

关 键 词：蚀变岩 岩石质量平衡 主成分变异 河南 金矿床 

分 类 号：P618.510.4[天文地球—矿床学] P595[天文地球—地质学]