豫西龙门店Ag-Pb-Zn矿床地球化学特征及成因分析  

Characteristics of geochemistry and genesis of Longmengdian Ag-Pb-Zn Deposit, Western Henan Province

作　　者：邵拥军[1,2] 陈星霖[1,2] 李永峰 刘清泉 张建东[1,2] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,湖南长沙410083 [2]中南大学地球科学与信息物理学院,湖南长沙410083 [3]河南省有色金属地质矿产局,河南郑州450052

出　　处：《中南大学学报（自然科学版）》2015年第1期171-179,共9页Journal of Central South University:Science and Technology

基　　金：中南大学国家杰出青年基金培育专项(2011JQ023);教育部有色金属成矿预测教育部重点实验室资助项目(2008)~~

摘　　要：对龙门店Ag-Pb-Zn矿床的成矿地质背景、微量元素特征、稀土元素特征以及C-O,S和Pb同位素特征进行研究,结合矿床地质特征、成矿作用、成矿环境及成矿时代,对矿床成因进行探讨。研究结果表明:本区矿石富集轻稀土元素、亏损重稀土元素,稀土元素含量与岩体及地层含量相当;岩体与围岩中成矿元素Ag,Au,Cu,Pb与Zn均表现出富集的特征,反映成矿物质来源具有复杂性;本区成矿流体主要来源于岩浆水,后期有大气降水加入;本区成矿物质主要来源于岩浆,地层提供了部分物质,龙门店矿床的形成与岩浆活动密切相关,其成因为与早白垩世重熔型花岗岩浆活动有关的浅成中低温热液型银铅锌矿床。The Geological background and the characteristics of trace element, REE elements and C-O, S, Pb isotopes were studied. And the genesis of Longmendian Ag-Pb-Zn deposit was discussed based on the geological characteristics of the deposit, mineralization, mineralization environment and metallogenic epoch. The results show that the content of REE elements of ores is consistent with that of intrusion and strata, enriched in light rare earth elements, depleted in heavy rare earth elements. Intrusion and wall rock are enriched in Ag, Au, Cu, Pb and Zn, which indicates that the source of ore-forming material is complex. The ore-forming fluid root comes from magmatic water, the later stage is mixture of magmatic water and precipitated water. S and Pb isotopes indicate that the metallogenic material mainly derives from magmatic events, partly from strata. The deposit formation is closely related to magmatism. The deposit genesis is epi-mesotheo-morphic Ag-Pb-Zn deposit related to remelting-type ganite magmatism of early Cretaceous.

关 键 词：成矿地质背景 矿床地球化学特征 稳定同位素特征 矿床成因 龙门店Ag-Pb-Zn矿床 

分 类 号：P611.1[天文地球—矿床学] P597.2[天文地球—地质学]