湘中龙山金-锑矿床氧同位素异常的发现与找矿意义  

THE DISCOVERY OF OXYGEN ISOTOPIC ANOMALIES AND THEIR GEOLOGICAL SIGNIFICANCE FROM THE LONGSHAN Au-Sb DEPOSIT,CENTRAL HUNAN

作　　者：陈少华[1] 潘家永[1] 夏菲[1] 曹双林[1] 谢贵珍[1] 

机构地区：[1]东华理工学院,江西抚州344000

出　　处：《矿物学报》2005年第3期295-298,共4页Acta Mineralogica Sinica

基　　金：国家自然科学基金(批准号:40272080);国家973项目(G1999043210)

摘　　要：系统分析了龙山金-锑矿床矿石、蚀变围岩与未蚀变围岩的氧同位素组成,其变化范围分别为13.1‰～13.5‰、14.5‰～15.3‰与19.2‰～20.0‰,显示矿石与蚀变围岩中存在明显的氧同位素负异常.氧同位素负异常可以作为该区寻找隐伏矿体的一种新的手段,其矿石与蚀变围岩氧同位素负异常的形成是大气降水与围岩水/岩反应的结果.In this work we systematically measured the oxygen isotopic compositions of ores, altered wall rocks and unaltered wall rocks from the Longshan Au-Sb deposit. The results showed that the oxygen isotopic compositions of ores （13.1‰～13.5‰） and altered wall-reeks （14.5‰～15.3‰） are much lower than those of unaltered wall-reeks （19.2‰～20.0‰）. Negative oxygen isotopic anomalies of ores and altered wall-rocks might be caused by water-rock reaction, and negative oxygen isotopic anomalies could be used as a new approach to looking for deep-sited orebodies in this area.

关 键 词：金-锑矿床 氧同位素组成 负异常 找矿意义 龙山 

分 类 号：P597[天文地球—地球化学]