东沟坝多金属矿床喷流沉积成矿特征的稀土元素地球化学示踪

丁振举 姚书振 刘丛强 周宗桂 杨明国. 东沟坝多金属矿床喷流沉积成矿特征的稀土元素地球化学示踪[J]. 岩石学报, 2003, 19(4): 792-798.
引用本文: 丁振举 姚书振 刘丛强 周宗桂 杨明国. 东沟坝多金属矿床喷流沉积成矿特征的稀土元素地球化学示踪[J]. 岩石学报, 2003, 19(4): 792-798.
DING ZhenJu,YAO ShuZhen,LIU CongQiang,ZHOU ZongGui and YANG MingGuo Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China. The characteristics of exhalation-sedimentary deposit of Donggouba polymetal deposit: evidence from ore'''' s REE composition.[J]. Acta Petrologica Sinica, 2003, 19(4): 792-798.
Citation: DING ZhenJu,YAO ShuZhen,LIU CongQiang,ZHOU ZongGui and YANG MingGuo Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China. The characteristics of exhalation-sedimentary deposit of Donggouba polymetal deposit: evidence from ore'''' s REE composition.[J]. Acta Petrologica Sinica, 2003, 19(4): 792-798.

东沟坝多金属矿床喷流沉积成矿特征的稀土元素地球化学示踪

  • 基金项目:

    受国家科技部攀登计划项目(95-预-39)、国土资源部"九五"地质科技攻关项目(95-02002)和中科院矿床地球化学开放实验室基金资助

The characteristics of exhalation-sedimentary deposit of Donggouba polymetal deposit: evidence from ore'''' s REE composition.

  • 为了进一步研究东沟坝矿床的喷流沉积成矿特征,对东沟坝矿床矿石及围岩的稀土元素进行了ICP-MS测定。东沟坝矿床矿石普遍显示明显的Eu正异常和弱的Ce负异常,说明成矿热液为温度较高(250℃及其以上)、相对还原的流体。Eu正异常和弱Ce负异常同时在矿石中发育,说明矿石沉淀时较高温度的热流体与少量的海水发生了对流混合。根据矿石与围岩的稀土配分模式的相似性及矿石铅、硫同位素组成特征,推断成矿金属元素主要来自赋矿围岩。根据矿石中大量发育重晶石和矿石普遍具有的LREE富集、明显的Eu正异常和弱Ce负异常的事实,推断同生成矿流体中大量SO4^2-的出现与岩浆脱气作用有关。
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出版历程
修回日期:  2002-11-26
刊出日期:  2003-11-30

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