摘要
根据收集到的国内外若干金矿床流体包裹体成分数据，结合Ｃｌ在热水溶液和花岗质熔体之间分配系数的最新实验成果，认为金矿床流体包裹体的高盐度〔ｗ（ＮａＣｌ）＞３０％〕和高ｗ（Ｋ＋）／ｗ（Ｎａ＋）比值（＞１）可以作为判别成矿流体主要为岩浆来源的辅助标志；以河南西峡石板沟金矿床为例，据流体包裹体成分特征，提出该矿床的形成与矿区两类不同时代侵入的花岗岩类岩石具有成因联系，成矿物质主要源自晋宁期侵位的甘沟岩体，而成矿流体则主要由华力西期侵位的石塘山花岗岩岩浆中出溶的岩浆热液构成。
Available fluid inclusion composition data from some gold deposits home and abroad and the experimental results on the partitioning of Cl between aqueous fluid and granite melt have shown that highly saline fluid [w(NaCl)>30%] and highly w(K+)/w(Na+) ratio (>1) may be regarded as a supplementary sign discriminating oreforming fluid with a magmatic origin.Applying the suggestion to the study of fluid inclusions in Shibangou gold deposit,Xixia,Henan Province,it is suggested that two magma bodies intruded in different orogenic phases in the area appear to be genetically related with Au mineralization,most oreforming metals may be mainly derived from Gangou pluton intruded in Jinning orogenic phase (797 Ma) as an orehosted rock,and the oreforming fluid may be dominantly composed of magmatic fluid exsolved from Shitangshan granite magma intruded in Variscan orogenic phase (268 Ma).
出处
《地质科技情报》
CAS
CSCD
北大核心
1998年第S1期68-72,共5页
Geological Science and Technology Information
基金
地质矿产部定向科研基金
国家自然科学基金
关键词
流体包裹体成分
岩浆热液
金矿床成矿流体
石板沟
河南西峡
fluid inclusion composition,magmatic hydrothermal solution,oreforming fluid of Au deposits,Shibangou,Xixia in Henan Province
