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新疆东天山阿奇山铅锌矿床成矿物质来源及矿床成因
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  • 英文篇名:Sources of ore-forming materials and genesis of Aqishan Pb-Zn deposit in East Tianshan Mountains, Xinjiang
  • 作者:邓莉明 ; 杨永强 ; 李智 ; 张小军
  • 英文作者:DENG LiMing;YANG YongQiang;LI Zhi;ZHANG XiaoJun;Xinjiang Uygur Autonomous Region Land and Resource Planning Research Institute;School of Earth Sciences and Resources, China University of Geosciences;Xinjiang Geological Survey Institute;
  • 关键词:地球化学 ; 硫、铅同位素 ; 成矿物质来源 ; 矿床成因 ; 阿奇山铅锌矿 ; 新疆东天山
  • 英文关键词:geochemistry;;sulfur and lead isotope;;source of ore forming material;;ore genesis;;Aqishan Pb-Zn deposit;;Xinjiang;;East Tianshan Mountains
  • 中文刊名:KCDZ
  • 英文刊名:Mineral Deposits
  • 机构:新疆维吾尔自治区国土资源规划研究院;中国地质大学地球科学与资源学院;新疆地质调查院;
  • 出版日期:2019-02-15
  • 出版单位:矿床地质
  • 年:2019
  • 期:v.38
  • 基金:覆盖区成矿成晕机理与找矿技术项目(编号:12120113088900)资助
  • 语种:中文;
  • 页:KCDZ201901011
  • 页数:12
  • CN:01
  • ISSN:11-1965/P
  • 分类号:161-172
摘要
阿奇山铅锌矿床位于新疆东天山成矿带西段,是近年来新发现的矿床。矿体赋存于下石炭统雅满苏组第四岩性段中,受地层控制,以细脉状和浸染状矿化类型为主。测试结果显示:矿石硫化物的δ~(34)S值分布在-1.6‰~-7.3‰之间,具塔式分布效应,估算成矿流体的总硫同位素值δ~(34)S∑S约为-4.15‰,具岩浆硫的特征。14件矿石围岩样品~(206)Pb/~(204)Pb、~(207)Pb/~(204)Pb和~(208)Pb/~(204)Pb值的变化范围分别为18.112~18.427、15.553~15.646和37.980~38.441;根据铅构造模式图解及参数综合分析,表明铅来自于壳幔物质混合。通过对阿奇山铅锌矿床地质特征、成矿物质来源研究,认为阿奇山铅锌矿床可能属于火山热液型矿床。
        The Aqishan Pb-Zn deposit was newly discovered in the East Tianshan metallogenic belt. The Pb-Zn orebodies are controlled by strata and hosted in the fourth member of Lower Carboniferous Yamansu Formation, with the major type being veinlet-disseminated and disseminated mineralization. The δ~(34) S values of sulfide minerals in the deposit range from~(-1).6‰ to-7.3‰ and exhibit a tower distribution. Estimated δ~(34) S∑Svalues of the ore-forming hydrothermal system are around-4.15‰, suggesting characteristics of sulfur from magmatic source. The206 Pb/204 Pb,207 Pb/204 Pb and208 Pb/204 Pb ratios of 14 samples from orebody and wall rocks vary in ranges of 18.112~18.427, 15.553~15.646 and37.980~38.441. Based on tectonic pattern and related parameters of lead isotope, the authors hold that the lead of the ore was mainly derived from mixture of crust materials. An analysis of geological features and source of ore-forming materials shows that he Aqishan Pb-Zn deposit may belong to the volcanic hydrothermal ore deposit.
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