| 新疆伽师砂岩型铜矿床地质及S、Pb同位素地球化学 |
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| 引用本文： | 王思程,薛春纪,李志丹.新疆伽师砂岩型铜矿床地质及S、Pb同位素地球化学[J].现代地质,2011,25(2). |
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| 作者姓名： | 王思程 薛春纪 李志丹 |
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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;造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京,100871
2. 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 |
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| 基金项目： | 国家科技支撑计划项目，高等学校学科创新引智计划项目，长江学者和创新团队发展计划项目 |
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| 摘 要： | 西南天山新生代山前盆地中的伽师铜矿是新疆近年发现和开发的一个重要的砂岩型铜矿,矿体产于古近系灰白色含岩屑钙质细砂岩中,呈与地层整合的板状、层状。矿石中硫化物主要为辉铜矿,矿体深部出现斑铜矿,极少量黄铁矿、闪锌矿等,硫化物多交代砂岩中胶结物或碎屑颗粒形成胶结结构,矿石发育稀疏浸染状、团块状、结核状等多种构造。矿石的硫同位素3δ4SV-CDT在-33.4‰~-24.6‰之间。矿石的铅同位素组成206Pb/204Pb=18.376~18.607、207Pb/204Pb=15.612~15.655、208Pb/204Pb=38.475~38.747。铜的硫化物矿化表现为含铜盆地流体(地下水)交代砂岩而沉淀,铜矿体形成于古近系细砂岩成岩晚期,矿石硫来源于细菌还原硫酸盐,矿石铅同位素组成指示成矿金属元素来自沉积盆地周围的蚀源区。
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| 关 键 词： | 矿床地质 S、Pb同位素 砂岩型铜矿 伽师铜矿 新疆 |
Geology and S-, Pb-isotopic Geochemistry of the Jiashi Sandstone-type Copper Deposit, Xinjiang, China |
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| WANG Si-cheng,XUE Chun-ji,LI Zhi-dan.Geology and S-, Pb-isotopic Geochemistry of the Jiashi Sandstone-type Copper Deposit, Xinjiang, China[J].Geoscience——Journal of Graduate School,China University of Geosciences,2011,25(2). |
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| Authors: | WANG Si-cheng XUE Chun-ji LI Zhi-dan |
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| Institution: | WANG Si-cheng1,2,XUE Chun-ji1,LI Zhi-dan1(1.State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences and Resources,China Universityof Geosciences,Beijing 100083,China,2.Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,School of Earth and Space Sciences,Peking University,Beijing 100871,China) |
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| Abstract: | The Jiashi copper deposit,located in Cenozoic piedmont basin system of southwestern Tianshan in Xinjiang,is an important sandstone-type copper deposit which has been discovered and mined recently.The ore bodies are tabular or stratiform in shape and occur in Neogene light-grey detritus-bearing calc-sandstone.The sulfide minerals in the ores are mainly chalcocite,fewer pyrite and sphalerite.Bornites occur at the deep part of the ore bodies.The ore shows disseminated,lumpish and nodular structures,and the sul... |
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| Keywords: | ore geology S-and Pb-isotopes sandstone-type copper deposit Jiashi copper deposit Xinjiang |
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