| 大坪超大型金矿床铅和硫同位素组成特征及其地质意义 |
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| 引用本文： | 袁士松,葛良胜,郭晓东,朝银银,张岱. 大坪超大型金矿床铅和硫同位素组成特征及其地质意义[J]. 桂林工学院学报, 2011, 31(1): 11-18 |
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| 作者姓名： | 袁士松 葛良胜 郭晓东 朝银银 张岱 |
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| 作者单位： | 中国人民武装警察部队黄金地质研究所;中国地质大学地球科学与资源学院;中国地质科学院地质研究所; |
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| 基金项目： | 国家“十一五”科技支撑项目(2006BAB01B10); 中国地质调查局国土资源大调查项目(200410200036) |
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| 摘 要： | 云南大坪超大型金矿床是哀牢山金矿带内最具代表性的金矿床之一,矿体赋存于海西期桃家寨闪长岩体内,矿石类型以石英脉型为主,与金伴生的是以黄铁矿、方铅矿为主的各种硫化物。本文对该矿床主成矿阶段石英脉型矿石中方铅矿的铅、硫同位素地球化学特征开展了系统研究,结果表明：大坪金矿床主成矿阶段铅同位素具有较窄的206Pb/204Pb值和相对较高的207Pb/204Pb值及208Pb/204Pb值,但变化范围不大,分布于正常铅范围。通过计算获得相关特征参数,利用铅构造模式图及相关图解综合分析,表明矿石铅为壳幔混合铅;硫同位素组成变化范围为-4.9‰-9.2‰,平均值为3.12‰,偏离陨石硫的范围,而与基性岩类的硫同位素组成非常接近,表明硫主要来源于深部,反映了地幔硫遭受地壳物质混入后的硫同位素组成。该矿床的成矿物质为深部幔源物质混合了壳源物质。
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| 关 键 词： | 铅同位素 硫同位素 金矿床 成矿物质 大坪 云南 |
Lead and Sulfur Isotope Characteristics and Geological Implication of Daping Gold Deposit |
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| YUAN Shi-song,GE Liang-sheng,GUO Xiao-dong,CHAO Yin-yin,ZHAN Dai. Lead and Sulfur Isotope Characteristics and Geological Implication of Daping Gold Deposit[J]. Journal of Guilin University of Technology, 2011, 31(1): 11-18 |
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| Authors: | YUAN Shi-song GE Liang-sheng GUO Xiao-dong CHAO Yin-yin ZHAN Dai |
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| Affiliation: | YUAN Shi-song1,2,GE Liang-sheng1,3,GUO Xiao-dong1,CHAO Yin-yin1,ZHAN Dai1(1.Institute of Gold Geology,Chinese Peoples Armed Police Force,Langfang 065000,China,2.School of Earth Science and Resources,China University of Geosciences,Beijing 100083,3.Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China) |
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| Abstract: | Daping gold deposit,located in the southern Yunnan,is representative gold deposit in Ailao Mountain gold belt.The ore bodies are hosted in Hercynian Taojiazhai diorite body.The ore is mainly quartz vein-type,with a variety of sulfide like,pyrite and galena.The geochemical characters of Pb and S isotope of galena are studied.The quartz-vein-type ores formed in main mineralization stage show that the Pb isotope has a relatively narrow ratio of 206Pb/204Pb and a relatively high ratio of 207Pb/204Pb and ratio o... |
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| Keywords: | lead isotope gold deposit metal sources Daping Yunnan |
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