四川甘孜甲基卡锂矿地质—地球化学特征和找矿标志  

A geological-geochemical prospecting model of the Jiajika lithium deposit int Garze,Sichuan

作　　者：肖瑞卿[1] 赵春[1] 付小方[1] 郝雪峰[1] 袁蔺平 潘蒙[1] 唐屹[1] 王伟 XIAO Rui-Qing;ZHAO Chun;FU Xiao-Fang;HAO Xue-Feng;YUAN Lin-Ping;PAN Meng;TANG Yi;WANG Wei(Sichuan Institute of Geological Survey,Chengdu 610081,China;Chengdu Mining Company of Sichuan,Chengdu 610081,China)

机构地区：[1]四川省地质调查院,四川成都610081 [2]四川省矿产责任有限公司,四川成都610081

出　　处：《物探与化探》2018年第6期1156-1165,共10页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划"深地资源勘查开采"重点专项"甲基卡及外围锂能源金属矿产基地深部探测技术示范"(2017YFC0602702);中国地质调查局项目"四川三稀资源综合研究与重点评价"(12120112208014);四川省国土资源厅项目"四川康定甲基卡海子北锂矿普查"(川国土资函[2015]55号)

摘　　要：通过对四川甘孜州甲基卡新三(X03)号脉锂矿地质矿产特征及所处区域、矿区的地球化学特征分析,初步总结了甲基卡锂矿的地质—地球化学特征和标志,以期为甲基卡矿田外围及同类型矿床的找矿提供技术示范。工作区内地层仅出露三叠系和第四系,且第四系覆盖达80%以上,找矿难度较大。锂(Li)、铍(Be)、铷(Rb)、铯(Cs)等稀有金属元素比重较小,化学活性强,尤其是锂易被粘土矿物吸附,故在土壤中锂含量增高,易形成次生晕,通过开展大比例尺土壤地球化学找矿工作,能迅速缩小找矿范围,圈定靶区,为发现稀有金属矿床起到重要的作用。The Jiajika lithium deposit is located in the Songpan-Garze orogenic belt of the Tibetan Plateau,lying in the middle part of the central fold-nappe zone of the Yajiang passive continental margin as well as the Yajiang tectonic-magmatic dome-like metamorphic body group.In this paper,the geological-geochemical prospecting model of the Jiajika lithium deposit is summarized,providing a demonstration for the prospecting of the periphery and the same type deposits in the Jiajika orefield.The exposed strata in this area are only Triassic and Quaternary sediments,and the Quaternary cover is more than 80%,which increases the difficulty to explore REE ore deposits.Lithium(Li),beryllium(Be),rubidium(Rb),cesium(Cs)and other rare metal elements possess a relatively small proportion with strong chemical activities,and lithium especially tends to be adsorbed on clay minerals,resulting in increasing lithium content in soil and easily forming secondary halos.By carrying out large-scale geochemical prospecting in subscale soil,the prospecting range can be rapidly reduced and the target areas can be delineated,which plays an important role in the discovery of rare metal deposits.

关 键 词：甲基卡 稀有金属 土壤地球化学 找矿标志 

分 类 号：P632[天文地球—地质矿产勘探]