| 胶东玲珑金矿区碲化物形成条件及其对金富集过程的约束SCIEI北大核心CSCD |
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| 引用本文： | 冯岳川,邱昆峰,王大钊,沙五金,李爽.胶东玲珑金矿区碲化物形成条件及其对金富集过程的约束SCIEI北大核心CSCD[J].岩石学报,2022,38(1):63-77. |
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| 作者姓名： | 冯岳川 邱昆峰 王大钊 沙五金 李爽 |
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| 作者单位： | 中国地质大学(北京)地球科学与资源学院, 地质过程与矿产资源国家重点实验室, 北京 100083;山东省地质科学研究院, 自然资源部金矿成矿过程与资源利用重点实验室, 山东省金属矿产成矿地质过程与资源利用重点实验室, 济南 250013;东华理工大学, 核资源与环境国家重点实验室, 南昌 330013 |
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| 基金项目： | 本文受国家自然科学基金项目（42130801、42072087）、国家重点研发计划（2019YFA0708603）、北京市科技新星计划（Z201100006820097）、高等学校学科创新引智计划（BP0719021）和自然资源部金矿成矿过程与资源利用重点实验室和山东省金属矿产成矿地质过程与综合利用重点实验室开放课题（KFKT201802）联合资助 |
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| 摘 要： | 胶东地区探明金储量超过5000t,是我国最重要的金矿集区。玲珑金矿区位于胶东西北部招-平断裂北段,具有典型含金石英脉矿床的特征。矿区部分矿段产出富碲铋化物的明金矿石,是研究富碲铋化物金矿床成因和金超级富集机制的理想对象。通过显微岩相学观察、扫描电镜及电子探针分析,首次对胶东玲珑金矿区富碲铋化物明金矿石的矿物组合和形成机制进行了较为详细的研究。玲珑金矿区含明金矿石中的金矿物主要为含银自然金,成色整体较高,平均为894。共发现了五种与自然金共生的碲化物,分别是辉碲铋矿、碲铋矿、碲银矿、碲铋银矿和碲镍矿,其中辉碲铋矿含量最多。通过矿物共生组合研究及物理化学条件分析,确定成矿流体的碲逸度范围为-12.6
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| 关 键 词： | 碲化物 自然金 富集机制 玲珑金矿区 胶东金成矿省 |
| 收稿时间： | 2021/8/21 0:00:00 |
| 修稿时间： | 2021/11/29 0:00:00 |
Forming conditions of tellurides and their constraints on gold enrichment in Linglong gold district, Jiaodong gold province |
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| FENG YueChuan,QIU KunFeng,WANG DaZhao,SHA WuJin,LI Shuang.Forming conditions of tellurides and their constraints on gold enrichment in Linglong gold district, Jiaodong gold province[J].Acta Petrologica Sinica,2022,38(1):63-77. |
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| Authors: | FENG YueChuan QIU KunFeng WANG DaZhao SHA WuJin LI Shuang |
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| Institution: | School of Earth Science and Resources, State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;Shandong Institute of Geological Sciences, MNR Key Laboratory of Gold Mineralization Processes and Resources Utilization, Key Laboratory of Metallogenic-Geologic Processes and Comprehensive Utilization of Minerals Resources in Shandong Province, Jinan 250013, China;State Key Laboratory of Nuclear Resource and Environment, East China University of Technology, Nanchang 330013, China |
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| Abstract: | Jiaodong gold province has proved gold reserves of more than 5000t, which is the most important gold concentration area in China. Linglong gold district is located in the northern section of Zhao-Ping fault in the northwest of Jiaodong Peninsula, and it has the typical characteristics of a gold-bearing quartz vein deposit. Some of the ore sections in this mining area produce tellurium-bismuth enriched gold ore, therefore, it is an ideal object to study the relationship of the genesis of ore deposits and the extreme enrichment mechanism of gold with the enriched tellurium-bismuth. Through microscopic observation, scanning electron microscope analysis (SEM) and electron probe micro-analysis (EPMA), the mineral assemblages and formation mechanism of tellurium-bismuth enriched gold ore in Linglong gold district were studied in detail for the first time. The gold minerals in Linglong mining area are mainly silver-bearing native gold, and the gold fineness is high with an average of 894. Five kinds of tellurides co-occurring with native gold have been found, namely, tetradymite, tellurobismuthite, hessite, volynskite and melonite, among which the tetradymite is the most abundant. According to the study of mineral assemblages and analysis of physical and chemical conditions, the range of tellurium fugacity in the ore-forming fluid is determined to be -12.6 < logfTe2 < -9.1, while the sulfur fugacity range of -13.6 < logfS2 < -9.6. The enrichment of tellurium and bismuth indicates they are formed by a deep mantle source, and to be more specifically, the tellurium and bismuth may have been derived from the subduction of the paleo-Pacific plate. The rich concentration of large grains of native gold in Linglong gold district is closely related to tellurium and bismuth, and the precipitation of silver telluride improves the fineness of native gold. |
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| Keywords: | Tellurides Native gold Enrichment mechanism Linglong gold district Jiaodong gold province |
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