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Syndeposition and epigenetic modification of the strata-bound Pb–Zn–Cu deposits associated with carbonate rocks in western Kunlun, Xinjiang, China
Zhengwei Zhang; Nengping Shen; Jiantang Peng; Xiangrong Yang; Guangyong Feng; Fu Yu; Lingjie Zhou; Yujiao Li; Chengquan Wu
2014
发表期刊Ore Geology Reviews
卷号62页码:227-244
摘要

Lead–zinc–copper (Pb–Zn–Cu) deposits in the western Kunlun Orogen of China are mostly distributed along the Keziletao–Kusilafu fault zones in the Palaeozoic clastic–carbonate rocks, which formed in a late Palaeozoic subsidence belt at the south-west margin of the Tarim platform. Geological and geochemical studies were conducted on these deposits including detailed field observation, petrographic study, and geochemical and isotopic analyses of sulfur, lead, strontium, rhenium–osmium, and argon isotopes, as well as fluid inclusion geochemistry. The characteristics of the deposits include: (1) Except for the Tiekelike Pb–Cu deposit associated with mid-Devonian rocks, all of the other deposits were developed in the lower layers of the early Carboniferous strata. These strata mostly comprise sedimentary dolomitic limestone, sandy limestone, black limestone, and calcareous shale. (2) The ore bodies are stratiform and host veins. The stratiform ores are coeval with host rocks (yielding ore-forming ages of 331–337 Ma), while the vein ore bodies are mostly massive deposits formed at 206–235 Ma. The isotopic compositions of the sulfur and lead reveal that the ore-forming elements originated from various sources. (3) The mineralization in cements of brecciated ore is a veinlet type, while in the breccias it is a disseminated type. The stratoid, disseminated, and framboidal structures of the ore reveal the synsedimentary ore-formation. However, the veins, mesh-veins, and massive structures indicate late stage hydrothermal mineralization. (4) The principal metallic minerals include sphalerite, galena, and pyrite, while the secondary oxide minerals include variable distributions of cerussite, anglesite and limonite. The gangue minerals include dolomite, calcite, quartz, sericite, and gypsum, with minor chert and barite. (5) The original host rocks likely experienced dolomitization, calcitization, and minor silicification. The ore deposits underwent hydrothermal alterations, sub-greenschist facies metamorphism, and brecciation. The ore deposits may have initially formed via syndeposition in a subsidence belt along the southwest margin of the late Paleozoic Tarim platform; these deposits were further modified during later hydrothermal alteration and orogenesis during the Triassic period.

关键词Western Kunlun lead–zinc–copper Strata-bound Ore Deposit syndeposition epigenetic Modification
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9362
专题矿床地球化学国家重点实验室
作者单位1.State Key Laboratory of Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 46 Guanshui Road, Guiyang 550002, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Zhengwei Zhang,Nengping Shen,Jiantang Peng,等. Syndeposition and epigenetic modification of the strata-bound Pb–Zn–Cu deposits associated with carbonate rocks in western Kunlun, Xinjiang, China[J]. Ore Geology Reviews,2014,62:227-244.
APA Zhengwei Zhang.,Nengping Shen.,Jiantang Peng.,Xiangrong Yang.,Guangyong Feng.,...&Chengquan Wu.(2014).Syndeposition and epigenetic modification of the strata-bound Pb–Zn–Cu deposits associated with carbonate rocks in western Kunlun, Xinjiang, China.Ore Geology Reviews,62,227-244.
MLA Zhengwei Zhang,et al."Syndeposition and epigenetic modification of the strata-bound Pb–Zn–Cu deposits associated with carbonate rocks in western Kunlun, Xinjiang, China".Ore Geology Reviews 62(2014):227-244.
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