阿旺加措;郑有业;杨万涛;索朗欧珠;

• 1:长江三峡集团三峡建设管理有限公司
• 2:中国地质大学(武汉)资源学院
• 3:中国地质大学(北京)地球科学与资源学院
• 4:中国人民武装警察部队黄金第十支队

摘要(Abstract)：

为了解藏南柯月铅锌多金属矿床主要矿物的标型特征及成矿物质来源,在详细野外及室内工作基础上对柯月铅锌多金属矿床进行了矿物电子探针和S-Pb同位素测定。柯月铅锌多金属矿床硫化物种类较多,电子探针分析结果显示,硫化物伴随的Cu、Ag含量较高。闪锌矿具有层控矿床特征,方铅矿及黄铁矿的标型特征表明其与沉积改造作用相关,同时也受到了岩浆及火山作用的影响。S同位素δ~(34)SCDT为4.9‰~11.2‰,与日当组地层S源范围相近,Pb同位素显示~(206)Pb/~(204)Pb比值为18.53~19.78,平均为19.589;~(207)Pb/~(204)Pb比值为15.674~15.939,平均为15.848;~(208)Pb/~(204)Pb比值为38.618~40.559,平均为40.155,与附近扎西康矿床的Pb同位素呈线性排列且放射性成因Pb较高,模式年龄均为负值,落入了北喜马拉雅和高喜马拉雅变质结晶岩系的印度地盾端元内,指示来源于上地壳。综上认为柯月铅锌多金属矿床具有沉积改造型矿床的特征;日当组地层及围岩对成矿提供矿源初始物质并且与扎西康特大型矿床成矿物质来源相似。

关键词(KeyWords)： S-Pb同位素;矿物标型;成矿物质来源;藏南柯月

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局项目(1212011220664);; “973”国家重点基础研究发展计划(2011CB403100);; 教育部长江学者和创新团队发展计划项目(IRT1083)

作者(Author): 阿旺加措;郑有业;杨万涛;索朗欧珠;

Email:

DOI: 10.19509/j.cnki.dzkq.2017.0308

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