摘要
本文主要研究了胶东金青顶和邓格庄金矿床蚀变体系的氧、硅同位素组成、硫化物矿物的硫同位素组成，方解石的碳、氧、锶、钐、钕同位素组成，结果表明金矿床早阶段成矿热液中水以非大气降水为主，晚阶段成矿热液中大气降水增加；成矿物质来源于地壳。推断金矿床由地壳物质在燕山期大规模低程度熔融出的富Ｋ、Ｎａ的流体交代改造岩石并汲取成矿元素形成的矿化热液和岩浆热液共同作用形成。
This paper has studied the isotopic compositions of oxygen and silica in altered system，the sulfur in sulphur minerals and the carbon，rubidium ，samarium and neodymium in calaiteof Jingqingding－Denggezhuang gold deposits，The results indicated that water in early min-eralized hydrothermal fluid is non－meteroic mainly, meteroic water increases in late mineral-ization stage，mineralizing materials is derived from the crust．It’s deduced that K－and Na－riched fluid by large scale and low－degree melting of the crust rework rock and leacheedmineralizing elements to form mineralized hydrothermal fluid which deposited gold with mag-matic fluid at Yanshan period.
关键词
金矿床
同位素组成
改造作用
gold deposit isotopic composition reworking process Jiaodong
