成矿带1∶20万水系沉积物地球化学分区的方法及地质意义:以西藏冈底斯铜多金属成矿带为例  

Geochemical Subdivisions in Metallogenic Belt with the 1∶200,000 Stream Sediments and Its Geological Significance: A Case Study in Gangdese Copper-polymetallic Metallogenic Belt

作　　者：王永华[1,2] 龚鹏[1] 龚敏[1] 马振东[1] 

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]成都地质矿产研究所,四川成都610081

出　　处：《现代地质》2010年第4期801-806,共6页Geoscience

基　　金：国土资源部地质调查项目"矿产资源地球化学模型建立与定量预测研究"(1212010733805)

摘　　要：以冈底斯铜多金属成矿带为例,阐述了利用1∶20万和1∶50万水系沉积物地球化学测量开展成矿区带地球化学分区的方法和思路,进一步对其地质意义进行了探讨。结果表明:小比例尺的水系沉积物地球化学数据具有地球化学分区示踪意义。总结出一套操作性强的地球化学分区方法,其方法具有指示找矿方向的实际意义,对区域构造单元划分具参考价值。地球化学分区为该区的找矿方向、成矿远景评价及基础地质调查奠定了基础。By taking Gangdese copper-polymetallic metallogenic belt as an example,methods and thoughts to carry out geochemical subdivisions in metallogenic belt scale using 1∶200,000 and 1∶500,000 stream sediments data are expounded,and further the geological significances are discussed.Results show that geochemical data of the small-scale stream sediments have tracer significance for geochemical subdivisions;therefore a set of operable geochemical subdivisions methods is summed up,which is beneficial for prospecting direction and referenced for tectonic subdivisions.In short,the geochemical subdivisions can guide for prospecting direction,mineral evaluation and basic geological survey.

关 键 词：小比例尺水系沉积物 冈底斯 铜多金属成矿带 地球化学分区 

分 类 号：P591[天文地球—地球化学]