| 云南香格里拉红山铜矿石硫化物环带及地质意义 |
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| 引用本文： | 俎波,薛春纪,亚夏尔,王庆飞,梁华英,赵毅,刘铭涛.云南香格里拉红山铜矿石硫化物环带及地质意义[J].岩石学报,2013,29(4):1203-1213. |
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| 作者姓名： | 俎波 薛春纪 亚夏尔 王庆飞 梁华英 赵毅 刘铭涛 |
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| 作者单位： | 1. 地质过程与矿产资源国家重点实验室,中国地质大学地球科学与资源学院,北京100083
2. 中国科学院广州地球化学研究所,广州,510640 |
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| 基金项目： | 本文受国家重点基础研究发展计划(2009CB421005);国家自然科学基金(41072069、40930423、40772061)和高等学校学科创新引智计划(B07011)联合资助. |
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| 摘 要： | 云南香格里拉县红山铜矿是三江义敦岛弧带南端重要铜矿床,颇受关注,成因认识分歧大.矿区出露上三叠统板岩、变碎屑岩和灰岩夹中基性火山岩、火山碎屑岩以及少量侵入其中的中酸性和超基性岩脉、岩株,透镜状铜硫化物矿体产在顺层状矽卡岩体内或边部,成矿后断裂明显.矿石中普遍发育以黄铁矿为核部、黄铜矿为中间带、磁黄铁矿为边部带的硫化物环带,其中核部黄铁矿呈立方体自形-半自形晶,黄铜矿呈他形晶围绕黄铁矿沉淀,磁黄铁矿呈他形分布在黄铜矿外围,内带常被外带硫化物溶蚀交代.环带从内到外硫化物先后沉淀,矿物生成顺序为黄铁矿-黄铜矿-磁黄铁矿.环带中三种硫化物矿物的REE配分曲线和微量元素蛛网图极为相似,负Eu异常显著,富集U、Th、Zr、Hf,亏损Rb、Sr、Ba,与矿区超基性岩表现出较高相似性；环带从内到外,∑REE(0.17371×10-6、1.22626×10-6、5.25925×10-6)和微量元素含量依次升高,Co/Ni和Se/Te比值降低,指示矿石硫化物沉淀过程中,可能伴随热液体系内地壳物质不断增加.环带中硫化物矿物δ34SV-CDT=3.81‰～5.23‰,具有岩浆硫源特征,δ34SV-CDT边部带磁黄铁矿 (4.47‰)＜δ34SV-CDT中间带黄铜矿(4.58‰)＜ δ34SV-CDT核部黄铁矿(4.65‰),三种硫化物间没有达到同位素平衡分馏.红山铜矿石环带结构是岩浆热液为主成矿流体中黄铁矿、黄铜矿、磁黄铁矿先后晶出成因,伴随硫化物环带的形成,热液系统从早到晚H2S和O2逸度降低或pH升高过程.
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| 关 键 词： | 硫化物环带 微量元素 硫同位素 红山铜矿 云南香格里拉 |
| 收稿时间： | 2012/9/19 0:00:00 |
| 修稿时间： | 2013/1/18 0:00:00 |
Sulfide zonal texture and its geological significance of ores from the Hongshan copper deposit in Shangri-la, Yunnan Province, China |
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| ZU Bo,XUE ChunJi,YA XiaEr,WANG QingFei,LIANG HuaYing,ZHAO Yi and LIU MingTao.Sulfide zonal texture and its geological significance of ores from the Hongshan copper deposit in Shangri-la, Yunnan Province, China[J].Acta Petrologica Sinica,2013,29(4):1203-1213. |
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| Authors: | ZU Bo XUE ChunJi YA XiaEr WANG QingFei LIANG HuaYing ZHAO Yi and LIU MingTao |
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| Institution: | State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | |
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| Keywords: | Sulfide zonal texture Trace elements S isotope Hongshan copper deposit Shangri-la Yunnan Province |
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