陕西华县西沟钼矿地质、地球化学特征及其对矿床成因的制约  

Geological and Geochemical Characteristics of the Xigou Mo Deposit in Huaxian County,Shaanxi Province: Constraint for Its Metallogenesis

作　　者：代军治 钱壮志[2] 高菊生[1] 李伍义 高毅 李长卫 DAI Jun-zhi1,2, QIAN Zhuang-zhi2, GAO Ju-sheng1, LI Wu-yi3, GAO Yi3, LI Chang-wei3(1. Northwest Geological and Mining Group Co. Ltd. for Nonferrous Metals, Xi＇an 710054, China ; 2. Chang＇ an University Xi＇an 710054, China; 3.No. 712 General Party Co. Ltd. of Northwest Mining and Geology for Nonferrous Metals, Xianyang Shaanxi 712000, China)

机构地区：[1]西北有色地质矿业集团有限公司,西安710054 [2]长安大学,西安710054 [3]西北有色七一二总队有限公司,陕西咸阳712000

出　　处：《矿物岩石地球化学通报》2018年第4期705-713,共9页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：西北有色地质矿业集团博士后项目(西色地发[2016]46号)

摘　　要：为了研究西沟钼矿床的成矿物质来源及矿床成因,对西沟钼矿床进行了地质、地球化学及稳定同位素研究。结果表明,西沟钼矿床的矿体主要以石英-方解石脉、石英脉类分布于太华岩群内,少量长石-石英脉型,辉钼矿、方铅矿、黄铁矿是主要矿石矿物,方解石和石英是主要的脉石矿物;含矿方解石具有较高的Sr、Ba和稀土含量,稀土元素及其特征值具火成碳酸岩组分特征,与黄龙铺矿田碳酸岩脉型钼矿床相似;成矿物质和成矿流体主要来源于深源或上地幔,成矿过程中有少量壳源物质或地下水参与。研究认为西沟矿床为石英-碳酸岩脉型钼铅矿床。In order to discuss the source of metallogenic materials and metallogenesis of the Xigou Mo deposit,the geology,geochemistry and stable isotopes have been studied in this paper. The results show that the Xigou Mo orebodies occur as major quartz and quartz-calcite veins and minor feldspar-quartz veins hosted in the Taihua group. Molybdenite,galena and pyrite are the main sulfide minerals. Calcite and quartz are the main gangue minerals. The ore-bearing calcite has relative high contents of Sr,Ba and REE,with similar REE contents and parameters of the carbonatite and characteristics of the Mo deposits of carbonatite-dyke type in the Huanglongpu Mo ore-field. The ore-forming materials and fluids are mainly come from deep source or upper mantle. Only minor crust-derived materials and meteoric water are involved in the mineralization. It I believed that the Xigou deposit is a quartz-carbonatite-dyke type Mo-Pb deposit.

关 键 词：西沟钼矿床 方解石 稀土元素 碳、氧同位素 幔源物质 

分 类 号：P618.65[天文地球—矿床学]