广东信宜东田金矿床稀土元素地球化学研究  

Rare Earth Elements Geochemistry of Dongtian Gold Deposit in Western Guangdong

作　　者：曹建劲[1] 

机构地区：[1]中山大学地球科学系

出　　处：《中国稀土学报》2004年第2期275-279,共5页Journal of the Chinese Society of Rare Earths

基　　金：中国科学院知识创新工程(KZCX2-102);国家自然科学基金(40273027)联合资助项目

摘　　要：云开隆起区分布有众多的金、银、钨、锡、铅、锌、钼、铁等金属矿床,是两广地区重要的成矿区之一。本文选择分布于隆起区腹部的信宜东田金矿床作为研究对象,对比研究该矿床含金石英脉、蚀变片麻岩型矿石、加里东期片麻状黑云母花岗岩、燕山晚期花岗斑岩的稀土元素分配模式,以及ΣREE,LREE,HREE,LREE/HREE,δEu,δCe,NLa/Yb,NLa/Sm等参数。结果表明含金石英脉与蚀变片麻岩型矿石的成矿物质来源相同,均来源于区内广泛分布的片麻状黑云母花岗岩,成矿时代应为加里东期。Yunkai plifted area is one of the important metallogenic areas in Guangdong and Guangxi Provinces, in which many gold, silver, tungsten, tin, lead, zinc, molybdenum, and iron deposits have been found.Dongtian gold deposit in the middle of Yunkai uplifted area, western Guangdong Province, is chosen as an example of those deposits. Comparative studies on the chondrite-normalized RE patterns and ΣRE, LRE/HRE, δ_(Eu), δ_(Ce), N_(La/Yb), and N_(La/Sm) of auriferous quartz veins, altered gneiss-type gold ores, Caledonian gneissic biotite granite, and Late Yanshanian granite porphyry were made. The results indicate that the source of the metallogenic materials of the auriferous quartz veins and the altered gneiss-type gold ores are the same, and both of them come from the gneissic biotite granite.Metallogenic epoch of the deposit is estimated to be Caledonian period.

关 键 词：地球化学 金矿 稀土 

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