贵州省三都—丹寨成矿带中卡林型金矿地球化学特征及成矿物质来源初探
Geochemical Characteristics and Metallogenic Materials Source of Carlin-Type Gcid Deposits in the Sandu-Danzhai Metallogenic Zone, Guizhou
查看参考文献32篇
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文摘
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为探讨三都—丹寨成矿带中卡林型金矿地球化学特征及成矿物质来源,总结了最近的研究成果以及相关数据,结果表明,三都—丹寨卡林型金矿中与成矿相关的方解石、萤石呈现中稀土富集型,方解石δ~(13)C_(PDB) =-1.61~-5.82‰, δ~(18)O_(SMOW) =13. 97?19.24‰,辉锑矿和雄黄δ~(34)S=14. 5‰~22. 37‰,辉锑矿和辰砂~(208)Pb/~(204)Pb = 37. 160?40. 330,~(207)Pb/~(204)Pb=15. 351 ?16.330,~(206)Pb/~(204)Pb=17. 101?20.080,表明三都—丹寨卡林型金矿成矿物质(碳、氧、硫、铅)可能主要来自该区地层,与黔西南卡林型金矿(成矿物质可能主要来自深部岩浆)有明显区别。其δD和δ~(18)O值显示成矿流体可能主要为卤水和变质流体组成的混合流体,并且到达浅部时混入了大气降水,成矿流体在其演化过程中,可能与有机质发生了同位素交换,或者发生过多期成矿作用。 |
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其他语种文摘
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To discuss geochemical characteristics and the source of ore-forming material of Sandu-Danzhai Carlin-type gold deposits,we collected data of Carlin-type gold deposits in the Sandu-Danzhai area,compared with deposits in the southwestern Guizhou province, and systematically summarized results of prior researches. It indicated that rnetallogenesis related calcite and fluorite in the Sandu-Danzhai ore belt are MREE enriched. The δ~(13) C_(PDB) and the δ~(18)O_(SMOW) values in calcites are —1. 61%~-5. 82‰ and 13. 97%0?9. 24%0, respectively. The δ~(34) S values of stibnite and realgar are 14. 5%0?22. 37%0 with an average of 18. 05%0. The lead isotope ratios, ~(208)Pb/~(204)Pb, ~(207)Pb/~(204)Pb and ~(206)Pb/~(204)Pb, of stibnite and cinnabar are 37. 160?40. 330,15. 351 ?16. 330 and 17. 101 ?20. 080,respectively, indicating that the metallogenic materials (C,O, S and Pb) may mainly come from the strata, which is obviously different from the Carlin-type gold deposits in southwestern Guizhou Province (whose might mainly come from the deep magma). The δD and δ~(18) O results indicates that the ore-forming fluids were primarily mixed brine-metamorphic fluids and atmospheric water might have infiltrated in at the shallow. The isotopes of the ore-forming fliud might have exchanged with organic matter during its evolution, or mutiperiodic mineralization happened. |
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来源
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矿物岩石地球化学通报
,2014,33(3):326-333 【核心库】
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DOI
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10.3969/j.issn.1007-2802.2014.03.006
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关键词
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卡林型金矿
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地球化学特征
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卡林型金矿对比
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排庭金矿床
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苗龙金矿床
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地址
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1.
中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵阳, 550002
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紫金矿业集团西北有限公司矿产地质勘察院, 乌鲁木齐, 830026
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贵州省地质矿产勘查开发局105地质大队, 贵阳, 550018
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贵州省有色地质勘查局一总队, 贵阳, 551400
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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地质学 |
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基金
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矿床地球化学国家重点实验室“十二五”项目群课题
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文献收藏号
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CSCD:5182489
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