| 江西岩背斑岩锡矿蚀变分带及其主要蚀变岩的地球化学特征 |
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| 引用本文：.1994.Alteration zoning of the Yanbei porphyry tin deposit in Jiangxi province and geochemical haracteristics of its main altered rocks[J].Mineral Deposits,13(1):1~10 |
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| 基金项目:国家自然科学基金资助项目 |
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| 中文摘要:通过对野外11条勘探线剖面、72个钻孔岩心的地质编录和室内500多块薄片的系统观察，将岩背锡矿围岩蚀变自下而上划分为三个蚀变带，即黄玉石英化带、绿泥石黄玉石英化带和绢云母石英化带，并对各蚀变带主要蚀变岩进行了系统的岩石化学、微量元素和稀土元素的研究结果表明，蚀变岩氟含量很高，热液中氟的存在有利于Sn、W、Cu及REE的迁移和富集，含氟流体是导致蚀变岩Sn、W、Cu的富集和REE含量增加的主要因素。 |
| 中文关键词:蚀变分带 蚀变岩 地球化学特征 斑岩锡矿 岩背 |
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| Alteration zoning of the Yanbei porphyry tin deposit in Jiangxi province and geochemical haracteristics of its main altered rocks |
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| Abstract:The Yanbei porphyry tin deposit is situated in the Yanbei volcanic basin and within the Shicheng-Xunwu deep fault belt．Based on detailed field geological Work and systematic thin section observations, the authors have divided the wall rock alterations in the Yanbei tin deposit into three alteration zones, i.e. the topaz-quantification zone，the chlorite-topaz-quartzification zone and the sericite-quartzification zone,and have made systematic studies on major altered rocks in various alteration zones in the light of petrochemistry, trace elements and rare earth elements. The results show that the altered rocks contain very high F, that the existence of F in the hydrothermal solution was favorable for the migration and enrichment of Sn,W,Cu and REE,and that the F-bearing fluids must have been the main factor resulting in the enrichment of Sn,W and Cu in the altered rocks and the increase in REE content. |
| keywords:alteration zoning,altered rock,geochemical characteristics,porphyry tin deposit,Yanbei |
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