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云南会泽铅锌矿床构造控矿及断裂构造岩稀土元素组成特征
CHARACTERISTICS OF ORE CONTROLLING STRUCTURES AND REE COMPOSITION OF FAULT ROCKS IN HUIZE LEAD ZINC DEPOSIT,YUNNAN
【摘要】 云南会泽超大型铅锌矿床是川滇黔铅锌成矿区大型富铅锌矿床的典型代表。本文在研究矿区成矿地质背景、划分断裂构造岩类型及构造体系的基础上 ,提出 NE构造带 (华夏系 )是会泽铅锌矿最主要的成矿构造体系 ,概括了构造控矿特征 ;以控矿断裂带中的构造岩、矿脉为主要研究对象 ,分析不同方向断裂构造岩的稀土元素组成特征 ,按其特征和配分模式 ,将构造岩 (矿石 )划分为 7种类型 :Eu富集 -开阔“W”型、Ce富集 - Eu弱亏损-平缓型、平缓型、HREE- L REE较富集 -开阔“V”字型、Eu强亏损 -下斜型、Eu亏损 -下斜型、Eu亏损 -平缓型 ,其中 NE向断裂带中的 Ce富集 - Eu弱亏损 -平缓型与 Eu富集 -平缓型模式的构造岩是成矿预测的微观标志之一。
【Abstract】 The large scale Huize Pb Zn deposit is a typical ore deposit occurred in the Sichuan Yunnan Guizhou Pb Zn mineralization district.On the basis of study on the geological background,classification of fault rocks and division of tectonic systems,the ore controlling characters were summarized and the ore forming tectonic system was proposed.The study of REE compositions in fault rocks occurred in faults with different directions showed that the fault rocks could be divided into 7 types:Eu excess with wide ″W″ pattern,Ce excess Eu depletion with gentle pattern,HREE LREE excess with wide ″V″ pattern,Eu strong depletion with inclined pattern,Eu depletion with inclined pattern and Eu depletion with gentle pattern.of the 7 types,fault rock in the northeast faults with Ce excess Eu depletion pattern and Eu excess with gentle pattern appeared to be the indicators for the Pb Zn minenlization prediction.
【Key words】 Ore controlling structures; REE composition; Fault rock; Lead zinc deposit; Huize,YunD;
- 【文献出处】 矿物岩石 ,Journal of Mineralogy and Petrology , 编辑部邮箱 ,2000年04期
- 【分类号】P613
- 【被引频次】91
- 【下载频次】867