陕西山阳夏家店金矿床地质与流体地球化学  

Geological and Geochemical Characteristics of Fluid Inclusion in Xiajiadian Gold Deposit,Shaanxi Province

作　　者：高菊生 朱华平[2] 原连肖 任涛 李剑斌 

机构地区：[1]西北有色地质勘查局713总队,陕西商州726000 [2]西北有色地质研究院,陕西西安710054

出　　处：《西北地质》2007年第3期68-74,共7页Northwestern Geology

基　　金：中国地质调查局地质调查项目(编号:200110200101)

摘　　要：夏家店金矿是在东秦岭震旦系与寒武系界面新发现和勘查的金矿床,主要为含金角砾岩型。研究认为夏家店金矿的硅化与区内的断裂构造期次关系紧密。矿石矿物中石英流体包裹体的成分富含Cl-和SO24-;成矿流体体系属CO2-H2O-XCl-XSO4(X代表阳离子)型。成矿温度有两个峰值,其一为240～360oC,集中于240～280oC;其二为120～240oC,集中于180～220oC,两期蚀变特征相协调。氢氧同位素组成反映了成矿流体主体是来自于富δ18OHO的变质水。The Xiajiadian gold deposit is a newly-discovered ore deposit occurring in the contact between Sinian and Cambrian strata The major ore type is gold-bearing breccia. Also, the silicification relating to the gold mineralization is closely related to the regional multi-phased faulting. This paper discusses the processes of mineralization for the deposit through study of fluid inclusion in minerals and O and H isotopes geochemistry. The fluid inclusion contents in quartz of ore-forming minerals are rich in CI^- and SO^2-,4 and the ore-forming fluid belong to CO2-H2O-XC1-XSO4 （X means positive ion） The inclusion composition reflects that orogenic processes provided ore-forming fluids for the gold mineralization. H and O isotopic composition shows that ore forming fluid is metamorphic water rich in δ^18OH2O.

关 键 词：流体包裹体 H、0同位素 夏家店金矿 陕西 

分 类 号：P618.51[天文地球—矿床学] P595[天文地球—地质学]