| 陕西小秦岭镰子沟碲金矿床物质组成特征及矿质沉淀机理研究 |
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| 引用本文： | 王雷,刘家军,朱文兵,代鸿章,刘冲昊,刘华南.陕西小秦岭镰子沟碲金矿床物质组成特征及矿质沉淀机理研究[J].矿床地质,2016,35(3):456-474. |
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| 作者姓名： | 王雷 刘家军 朱文兵 代鸿章 刘冲昊 刘华南 |
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| 作者单位： | 中国地质大学地质过程与矿产资源国家重点实验室,北京 100083;中国地质大学地球科学与资源学院,北京 100083 |
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| 基金项目： | 本文系国家自然科学基金(编号:41573036)、高等学校博士学科点专项科研基金(编号:20130022110001)和国家重点基础研究发展规划(编号:2014CB440903)的部分研究成果 |
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| 摘 要： | 镰子沟金矿床是小秦岭驾鹿金矿田内的一个重要金矿床,赋存于太古宇太华群秦仓沟组深变质片麻岩系中,矿石主要为石英脉型。通过显微镜下观察和电子探针分析,确认矿石中存在碲金矿、斜方碲金矿、碲金银矿、碲银矿、碲铅矿、碲镍矿、自然碲等大量含碲矿物。在石英、黄铁矿裂隙中,也存在大量自然金颗粒,它们与硫化物、碲化物共生。结合不同成矿阶段的成矿温压条件和矿物组合研究,构建了该矿床的热力学相平衡关系图,限定了碲化物与其他矿物稳定存在的物理化学条件:即在成矿Ⅱ阶段,f(O2)约为10~(-34.00)~10~(-31.00),f(H2S)约为10~(-1.42)~10~(-0.9),pH值约为6.0~6.8(300℃)。在成矿Ⅲ阶段,f(S2)的范围约在10~(-16.56)~10~(-12.30)之间,而f(Te_2)的范围约在10~(-13.70)~10~(-9.44)(200℃)。碲化物一般晚于硫化物形成,并且高的f(Te_2)值和f(Te_2)/f(S_2)比值是控制碲化物形成的关键因素。
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| 关 键 词： | 地质学 矿物学 金矿 碲化物 矿质沉淀 镰子沟 小秦岭 |
| 收稿时间： | 2015/6/14 0:00:00 |
| 修稿时间： | 2016/3/20 0:00:00 |
Mineral association and mechanism of mineral precipitation of Lianzigou gold-telluride deposit in Xiaoqinling gold orefield, Shaanxi Province |
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| WANG Lei,LIU JiaJun,ZHU WenBing,DAI HongZhang,LIU ChongHao and LIU HuaNan.Mineral association and mechanism of mineral precipitation of Lianzigou gold-telluride deposit in Xiaoqinling gold orefield, Shaanxi Province[J].Mineral Deposits,2016,35(3):456-474. |
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| Authors: | WANG Lei LIU JiaJun ZHU WenBing DAI HongZhang LIU ChongHao and LIU HuaNan |
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| Institution: | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China,State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China,State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China,State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China,State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China and State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | |
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| Keywords: | geology mineralogy gold deposit tellurides precipitation mechanism Lianzigou Xiaoqinling |
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