江西横峰县葛源司铺一带叶家组地球化学特征及金矿含矿性分析  

Geochemical Characteristics and Gold Ore Potentiality Characteristics of the Yejia Formation in Geyuan-Sipu Area,Hengfeng County,Jiangxi Province

作　　者：凡秀君 陈益平[2] 江俊杰 刘杨 张宛 FAN Xiu-jun;CHEN Yi-ping;JIANG Jun-jie;LIU Yang;ZHANG Wan(Basic Geological Survey Institute of Jiangxi Geological Survey Institute,Nanchang 330030,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;Ecogeological Party,Geological Bureau of Jiangxi Province,Nanchang 330002,China)

机构地区：[1]江西省地质调查勘查院基础地质调查所,江西南昌330030 [2]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [3]江西省地质局生态地质大队,江西南昌330002

出　　处：《东华理工大学学报（自然科学版）》2022年第5期410-418,共9页Journal of East China University of Technology(Natural Science)

基　　金：中国地质调查局项目“江西省灵山地区矿产地质调查”(1212011220535)。

摘　　要：江西横峰县葛源司铺一带位于赣东北重要矿集区内,叶家组是赣东北地区金矿的重要赋存层位之一,研究其地球化学及含矿性特征可以扩大研究区金矿找矿前景。对叶家组岩性特征、水系沉积物地球化学特征、硫同位素特征及金矿含矿性进行了综合研究。研究表明,水系沉积物地球化学数据显示该地层出露区水系沉积物中Au平均含量为4.75×10^(-9),明显高于全区(2.62×10^(-9))和全省背景值(1.37×10^(-9)),Au在叶家组中的变异系数为3.98,说明Au的成矿可能性大。含矿流体中的δ^(34)S值为15.1‰~19.9‰,与海水硫或海相蒸发盐岩的硫同位素组成一致,说明金矿成矿元素来源于海底火山喷发的叶家组火山岩。通过综合分析区域地质特征、叶家组岩性特征及地球化学特征,初步圈定了大钨、云台山和赖家3处金矿找矿远景区。The Geyuan-Sibu belt in Hengfeng county is an important ore concentration area of northeast Jiangxi province.The stratum of Yejia Formation is one of the important ore-bearing stratum for gold deposits in northeast Jiangxi province.The study of geochemistry and ore-bearing characteristics of the Yejia Formation can enlarge the prospecting area for gold deposits in the study area.The lithologic,stream sediment geochemical,sulfur isotope characteristics and ore-bearing properties of the Yejia Formation are studied comprehensively,and some suggestions for the future work are put forward.The results show that the stream sediment geochemistry shows that the content of Au in the stream sediment of the outcrop area is 4.75×10^(-9),which is significantly higher than the background value of the whole region(2.62×10^(-9))and the whole province(1.37×10^(-9)).The variation coefficient of Au in the Yejia Formation is 3.98,indicating that the mineralization possibility of Au is high.Theδ^(34)S values in the ore-bearing vary from 15.1‰to 19.9‰,which are consistent with the sulfur isotopic composition of seawater or marine evaporite rocks,indicating that the ore-forming elements are derived from the Yejia Formation volcanic rocks erupted by submarine volcanoes.Finally,through the comprehensive analysis of regional geological,lithologic and geochemical characteristics of the Yejia Formation,three gold prospecting areas,namely Dawu,Yuntaishan and Laijia,have been delineated.

关 键 词：地球化学特征 含矿性 找矿方向 叶家组 横峰县 

分 类 号：P618.2[天文地球—矿床学]