| 胡 鹏.印度尼西亚苏门答腊岛唐塞斑岩铜钼矿床成矿流体及成矿物质来源—来自氢、氧、硫和铅同位素证据[J].地质与勘探,2018,54(6):1202-1214 |
| 印度尼西亚苏门答腊岛唐塞斑岩铜钼矿床成矿流体及成矿物质来源—来自氢、氧、硫和铅同位素证据 |
| Sources of ore-forming fluids and materials of the Tangse porphyry Cu-Mo deposit in Sumatra Indonesia: Constraints from H, O, S and Pb isotopic geochemistry |
| 投稿时间：2018-06-19 修订日期：2018-11-22 |
| DOI：10.12134/j.dzykt.2018.06.013 |
| 中文关键词: 流体包裹体 同位素 成矿流体 成矿物质 唐塞 苏门答腊岛 |
| 英文关键词: fluid inclusions, isotopes, ore-forming material, ore-forming fluid, Tangse, Sumatra island |
| 基金项目:中国地质调查局印度尼西亚苏门答腊岛铜多金属资源潜力评价（编号：DD20160114）和湘西-鄂西成矿带神农架-花垣地区地质矿产调查二级项目（编号：DD20160029）资助 |
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| 中文摘要: |
| 唐塞斑岩铜钼矿床位于苏门答腊岛北部，是岛上规模最大的矿床。本文在系统的野外观察及室内岩相学观察的基础上，通过开展系统的流体包裹体的岩相学、显微测温及H、O、S、Pb同位素测试分析，查明该矿床的成矿流体特征，分析探讨其成矿物质来源。研究表明，含矿石英脉中主要发育气液两相包裹体，主成矿阶段流体为中高温（280~386℃）、中等盐度（11.46~15.27）wt%NaCleqv、中等密度（0.73~1.11g/cm3）的流体，成矿深度为7.17~9.59km，矿床形成于中等深度环境；矿石石英脉中石英的δ18OH2O值范围为4.6‰~6.3‰，含矿石英脉中石英的δ18DV-SMOW值范围为-64.9‰~-73.5‰，成矿流体主要为岩浆水，有一定量的大气降水混入。矿石中硫化物组成变化范围窄，为1.32‰~2.23‰，多数集中在1‰左右，且具有呈塔式分布特点，表明主要为岩浆硫源；矿石硫化物的206Pb/204Pb、207Pb/204Pb、208Pb/204Pb比值分别为18.767~19.032、15.689~15.899和38.683~39.159，具有显著的上地壳和地幔混合性质，表明成矿物质可能与大洋沉积物和洋壳的部分熔融有关。以上研究证明，唐塞矿床属于中-高温中等深度斑岩型铜钼矿床。 |
| 英文摘要: |
| The Tangse porphyry copper-molybdenum deposit is located in the northern part of Sumatra island and the northern part of Sumatra fault system, which is the largest deposit on the Sumatra island. Based on systematic geologic, petrographic and H-O-S-Pb isotope geochemical studies on hydrothermal minerals, this work discussed the origin of ore-forming fluid and materials and genesis of the Tangse deposit. Hydrogen and oxygen isotope analyses indicate that δ18OH2O of quartz from quartz vein of ores range from 4.6‰ to 6.3‰, δ18DV-SMOW of quartz ranges from﹣64.9‰ to﹣64.9‰, suggesting that the ore-forming fluid is mainly granite magmatic water, with certain amounts of meteoric water. The δ34S values of sulfide minerals range from 1.32‰ to 2.23‰. S isotopic histogram shows single peak distribution, indicating an origin of magma sulphur. Lead isotopic compositions of ore are basically constant, with 206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb ratios of sulfide ores of 18.767~19.032, 15.689~15.899 and 38.683~39.159, respectively, which shows that the ore-forming materials may be related to the partial melting of ocean sediments and ocean shells. This study proves that the Tangse deposit belongs to medium-high temperature and medium-depth porphyry copper-molybdenum deposit. |
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