摘要
西藏蒙亚啊铅锌矿床位于隆格尔—念青唐古拉断隆带东段,是冈底斯北带内的一个典型的矽卡岩矿床。对矿区内出露的矽卡岩、粉砂岩、斑岩岩体作全岩及微量元素分析表明:常量元素方面,样品中花岗斑岩呈高Si、中-高Al、低Ti的特征。所测矽卡岩样品中Ca含量远大于Mg、Mn以及K+Na的含量,该区矽卡岩主要由钙铁榴石组成;微量元素方面,矽卡岩样品的微量元素含量普遍低于岩体及粉砂岩样品且金属元素含量差异较大;稀土元素方面,所测样品均具有轻稀土富集,Ce负异常的特征,说明部分元素富集存在一定的成因联系。
Mengya'a Pb-Zn deposit is located in the eastern section of Longgeer-Nianqingtanggula thifted range.It is a typical skarn-type deposit in the northern Gangdise orogen belt.Based on the analysis result of constant elements and trace elements of skarn rock,siltstone,porphyry exposed in the mining area,it is shown that for the major element characteristics,the content of Si in granite porphyry is relatively higher,the content of Al is in medium-scale and the content of Ti is relatively lower.The content of Ca of skarn rocks is much higher than those of Mg,Mn and K+Na.The content of trace elements in skarn samples is lower than those of porphyry samples and siltstone samples in general and the differentiation of metallic elements is obvious as well.All the samples are richful in LREE and the Ce anomaly presents a negative feature.Therefore,there is a genetic relation among the lead and zinc elements with the enrichment of a part of other chemical elements in the wall rocks.
作者
赖翔
陈翠华
涂宗林
张燕
宋志娇
辜鹰
陈宵杰
杨德平
LAI Xiang;CHEH Cuihua;TU Zonglin;ZHANG Yan;SONG Zhijiao;GU Ying;CHEN Xiaojie;YANG Deping(Chengdu University of Technology,Chengdu 610059,Sichuan,China;The 403 Geological Team of Sichuan Bureau of Geologyand Mineral Resources Development,Emeishan 614200,Sichuan,China)
出处
《矿产与地质》
2017年第6期1063-1071,共9页
Mineral Resources and Geology
基金
四川省教育厅项目(编号:SZX040)
中国地质调查项目(编号:12120113036200)
国家自然科学基金项目(编号:41372093)共同资助
