| 滇西北衙金多金属矿床流体包裹体研究 |
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| 引用本文： | 肖晓牛,喻学惠,莫宣学,杨贵来,李勇,黄行凯.滇西北衙金多金属矿床流体包裹体研究[J].地学前缘,2009,16(2):250. |
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| 作者姓名： | 肖晓牛 喻学惠 莫宣学 杨贵来 李勇 黄行凯 |
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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;岩石圈构造、深部过程及探测技术教育部重点实验室;云南省地矿资源股份有限公司; |
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| 基金项目： | 国家重点基础研究发展计划“973”项目(2004CB412603) |
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| 摘 要： | 北衙金多金属矿是与滇西新生代富碱斑岩有关的典型代表之一。通过对矿区石英脉、富碱斑岩中的石英斑晶以及方解石脉中流体包裹体的类型、特征、温度、盐度、成矿压力以及流体包裹体中气液相成分分析和包裹体的激光拉曼探针分析,探讨了流体性质、来源。研究表明,该区存在高温高盐度流体、中高温高盐度流体、中低温低盐度流体3种流体。流体总体属于NaCl-H2O体系,均一温度范围在132～550℃(个别大于550℃),盐度范围在1.9%～61.1%(NaCleq)。高盐度流体不是由热水溶液的不混溶作用或沸腾作用形成的,而是由中酸性岩浆在深部岩浆房中通过结晶分异作用形成,和/或在浅成条件下于岩浆结晶的最后阶段从浅部岩浆中直接出溶形成的。红泥塘、南大坪两矿段石英斑晶中金属子矿物特别是黄铜矿的发现,暗示早期来自岩浆的热液流体金属含量较高,形成于大气降水与岩浆热液混合之前。上述特征表明北衙地区富碱斑岩具有巨大成矿潜力。
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| 关 键 词： | 流体包裹体 黄铜矿子矿物 岩浆热液 富碱斑岩 滇西北衙 |
A study of fluid inclusions from Beiya gold-polymetallic deposit in Western Yunnan |
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| Xiao Xiaoniu,Yu Xuehui,Mo Xuanxue,Yang Guilai,Li Yong,Huang Xingkai.State Key Laboratory of Geological Processes , Mineral Resources,Key Laboratory of Lithosphere Tectonics , Lithoprobing Technology of Ministry of Education,China University of Geosciences,Beijing ,China .Yunnan Geology & Mineral Resources Co.LTD,Kunming ,China.A study of fluid inclusions from Beiya gold-polymetallic deposit in Western Yunnan[J].Earth Science Frontiers,2009,16(2):250. |
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| Authors: | Xiao Xiaoniu Yu Xuehui Mo Xuanxue Yang Guilai Li Yong Huang XingkaiState Key Laboratory of Geological Processes Mineral Resources Key Laboratory of Lithosphere Tectonics Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing China Yunnan Geology & Mineral Resources CoLTD Kunming China |
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| Institution: | Xiao Xiaoniu1,Yu Xuehui1,Mo Xuanxue1,Yang Guilai1,2,Li Yong1,Huang Xingkai11.State Key Laboratory of Geological Processes , Mineral Resources,Key Laboratory of Lithosphere Tectonics , Lithoprobing Technology of Ministry of Education,China University of Geosciences,Beijing 100083,China 2.Yunnan Geology & Mineral Resources Co.LTD,Kunming 650215,China |
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| Abstract: | The Beiya gold-polymetallic deposit is one of the typical deposits related to the alkali-rich intrusion of the Cenozoic period in western Yunnan. This paper studies the fluid inclusions from quartz vein,quartz porphyroblast of alkali-rich porphyry and calcite vein in the mining area. We investigated their types,temperatures,salinities,densities,pressures,the analytical data of liquids and gases,and the results of Laser Raman Microprobe Analysis. Based on above study,we made further discussions on the charac... |
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| Keywords: | fluid inclusion chalcopyrite magmatic hydrothermal fluids alkali-rich porphyry Beiya in Western Yunnan |
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