西藏尼雄地区水系沉积物地球化学特征及异常分布规律  

Stream sediment geochemical characteristics and the anomly distribution pattern in Nixiong area,Tibet

作　　者：袁振国[1,2] 陈秋伶[3] 钟俊靖 何国建[2] 钟文[2] 

机构地区：[1]南京大学,南京210093 [2]江西省地质调查研究院,南昌330030 [3]江西省地矿局915地质大队,南昌330002

出　　处：《地质找矿论丛》2013年第4期620-628,共9页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局大调查项目"西藏尼雄地区地质矿产调查"(编号:1212011018006)资助

摘　　要：西藏尼雄地区位于拉达克—冈底斯—拉萨—腾冲陆块,区内已发现尼雄特大型富磁铁矿、日阿中型铜多金属矿等矿床。文章以1∶5万水系沉积物地球化学调查为基础,总结水系沉积物地球化学特征及分布规律。研究发现区内成矿作用与亲铜元素和铁族元素有关,二叠系昂杰组、拉噶组是区内金矿的有利地层,敌布错组是寻找银、锌、铅、镉矿产的最佳地层,所圈化探异常与已有矿(化)点区域套合较好。Nixiong area in Tibet is geotectonically located in the Ladakh-Gangdise-Lasa-Tengchong land- mass. In the area have been discovered Nixiong large sized rich magnetite deposit and Riar medium sized copper polymetallie deposit etc, Based on stream sediment geochemical survey at scale 1,5 0000 the geo- chemical characteristics and anomly distribution pattern are summarized. Cluster analysis of ore elements shows that mineralization in the area is related to chalcophile elements and iron group elements. Ore-bear ing coefficients of the main strata demonstrate that Permian Angjie formation-and Lage formation are the favorable ore host rocks and Dibucuo formation is the optimum horizon for further exploration of Ag, Zn, Cd, Pb mineral resources in the area. Systematic investigation of mineral resources in the area indicates that geochemical anomlies located are well coincided with the known ore （mineralization） occurrences.

关 键 词：尼雄地区 水系沉积物 地球化学特征 西藏自治区 

分 类 号：P632.3[天文地球—地质矿产勘探]