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| 川西龙门山地区元古代VMS铜矿床:硫化物微量元素和硫同位素证据 | |
| 引用本文： | 杨钻云,邱仁轩,秦术凯,仲世新,张羽洋.川西龙门山地区元古代VMS铜矿床:硫化物微量元素和硫同位素证据[J].地质科技情报,2009,28(4). |
| 作者姓名： | 杨钻云 邱仁轩 秦术凯 仲世新 张羽洋 |
| 作者单位： | 1. 四川冶金地质勘查局六0六大队,四川,彭州,611930;成都理工大学沉积研究院,成都,610059 2. 四川冶金地质勘查局六0六大队,四川,彭州,611930 3. 贵州省有色地质矿产勘查院,贵阳,550003 |
| 基金项目： | 四川冶金地质勘查局项目 |
| 摘 要： | 川西龙门山地区元古宙变质火山碎屑岩系中发育一系列块状黄铁矿型铜矿床,含矿围岩形成于岛弧构造环境.矿石中黄铁矿占金属矿物总质量分数的90%左右,黄铜矿质量分数为0.8%~3.0%,闪锌矿为1%~4%.矿石主要元素为Fe、S、Zn、Cu、Mn等,其次为Ag、Au、Pb、Se、Cd、Ga、Ti、V、Co等元素,全区各矿层矿石中δ(34S)分布范围为 -1.5‰~+15.9‰,平均为 +7.6‰,N(32S)/N(34S)值为22,据此推断成矿物质应来自地壳深部,与洋壳俯冲作用有关.主要金属硫化物及其微量元素和硫同位素组成特征表明矿床类型为火山成因块状硫化物矿床,即VMS矿床. |
| 关 键 词： | VMS铜矿床 硫同位素 微量元素 |
The Proterozoic VMS Copper Deposit in Longmen Mountain Area of Chuanxi:Evidence from Sulphide Trace Element and Sulfur Isotope |
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| YANG Zuan-yun,QIU Ren-xuan,QIN Shu-kai,ZHONG Shi-xin,ZHANG Yu-yang.The Proterozoic VMS Copper Deposit in Longmen Mountain Area of Chuanxi:Evidence from Sulphide Trace Element and Sulfur Isotope[J].Geological Science and Technology Information,2009,28(4). | |
| Authors: | YANG Zuan-yun QIU Ren-xuan QIN Shu-kai ZHONG Shi-xin ZHANG Yu-yang |
| Institution: | 1.The 606 Team of Sichuan Metallurgy Geology Exploration Bureau;Pengzhou Sichuan611930;China;2.Institute of Sedimentary;Chengdu University of Technology;Chengdu610059;3.Guizhou Nonferrous Metal Geology Mine Perambulation Bureau;Guiyang 550003;China |
| Abstract: | A series of blocklike pyritic copper deposits are developed in the epimetamorphic athrogenic rock in Longmen Mountain of Chuanxi area(western Sichuan),where ore-bearing rocks are formed in island arc tectonic environment. The pyrite amounts to nearly 90% of whole metallic minerals, with the content of chalcopyrite varing from 0.8% to 3% and sphalerite from 1%-4%. The main elements of mineral are Fe, S,Z, Cu, and Mn, and sub-elements are Ag, Au, Pb, Se, Cd, Ga, Ti, V, Co, etc. The ratio of δ(34S) spreading each layer ranges from -1.5‰ to +15.9‰ with the average occupation +7.6‰ and the ratio of 32S/34S 22. It can be concluded from the finding above that the elements are mainly sourced the deep earth's crust, about the subduction area of the oceanic crust.The main metallic sulphide and its trace elements and sulfur isotope formation character show that the mineral belongs to massive sulfide deposit formed by volcano--the VSM. |
| Keywords: | VSM copper deposit sulfur isotope trace element |
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