广东大宝山铜多金属矿床伴生碲铋矿物特征及其指示意义  

Characteristics of associated Te-Bi-minerals and its indicative significance of Dabaoshan copper polymetallic deposit in Guangdong Province

作　　者：邓明华 方贵聪 赵如意 陈远荣 张宏 吴家旭 黄振男 杨蕊嘉 莫连 DENG Minghua;FANG Guicong;ZHAO Ruyi;CHEN Yuanrong;ZHANG Hong;WU Jiaxu;HUANG Zhennan;YANG Ruijia;MO Lian(Guangxi Key Laboratory of Hidden Metal Mineral Exploration,College of Earth Sciences,Guilin University of Technology,Guilin 541006,Guangxi,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,Jiangxi,China;The Nuclear Geological Brigade No.305,Guangxi Zhuang Autonomous Region,Liuzhou 545005,Guangxi,China)

机构地区：[1]桂林理工大学地球科学学院,广西隐伏金属矿产勘查重点实验室,广西桂林541006 [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]广西壮族自治区三〇五核地质大队,广西柳州545005

出　　处：《矿产与地质》2022年第5期962-970,共9页Mineral Resources and Geology

基　　金：国家重点研发计划项目(2021YFC2900100);广西自然科学基金项目(2022GXNSFFA035025、2020GXNSFAA159154)共同资助。

摘　　要：铋、碲金属元素作为广东大宝山铜多金属矿床中的两种重要伴生矿化组分,其赋存状态及成因研究较为薄弱。通过野外系统地质采样、详细岩矿鉴定和电子探针成分分析,查明了铋、碲元素在该矿床中主要呈独立矿物赋存于金属硫化物内部、裂隙或边缘,形成的碲铋矿物种类丰富,主要包括自然铋、硫碲铋矿B、叶碲铋矿、辉铋矿、碲银矿、碲铋矿、辉碲铋矿、赫碲铋矿、萨硫碲铋铅矿和应硫碲铋矿等。自然铋的矿物颗粒结晶粗大,形成环境相对稳定,是Bi的主要赋存形式之一,且常常出现自然铋和辉铋矿共存。Bi主要来源于燕山期中酸性岩浆热液和部分围岩中矿化元素的活化,Te的来源与深部岩浆活动或地幔物质有着密切关系。燕山期岩浆热液携带了大量含矿流体上升,当高温热液演化到中温时,Bi、Te金属元素便逐渐富集、沉淀而成矿。Bi and Te are two important metal elements associated with the mineralization in the Dabaoshan copper polymetallic deposit, Guangdong Province. The study on their occurrence and genesis are relatively weak. Based on systematic sampling in the field, detailed microscopic identification and electronic probe composition analysis, it is found that Bi and Te are mainly independent minerals in the deposit, which occur in the interior, cracks or edges of metallic sulfides. The Te-Bi minerals are various in species, including bismuth, joseite B, pilsenite, bismuthinite, hessite, tetradymite, tellurobismuthite, hedleyite, saddlebackite and ingodite, etc. The mineral crystal of bismuth is coarse and the formation environment is relatively stable, which is one of the main occurrence forms of Bi, and bismuth and bismuthinite coexist usually. Bi is mainly derived from Yanshanian intermediate-acid magmatic intrusion and the activation of mineralized elements in some part of surrounding rocks. The source of Te is closely related to the deep magmatic activity or mantle source. The Yanshanian magmatic hydrothermal fluid has carried a large number of ore-bearing fluids to rise. When the high temperature hydrothermal hydrothermal fluid evolves to the middle temperature, Bi and Te metal elements will be gradually enriched, precipitated and mineralized.

关 键 词：大宝山矿床 碲铋矿物 成因矿物学 电子探针 广东 

分 类 号：P618.69[天文地球—矿床学] P618.83[天文地球—地质学]