蒙古国查夫铅锌矿锆石U-Pb年代学、岩石地球化学及构造意义
Zircon U-Pb chronology,petrogeochemistry and tectonic implications of the Tsav lead-zinc deposit in Mongolia
王宏明1
作者信息
- 1. 内蒙古煤炭地质勘查(集团)四七二有限公司,内蒙古 通辽 028000
- 折叠
摘要
通过岩石地球化学研究,蒙古国查夫铅锌矿侵入岩石体为过铝质、高钾钙碱性系列,主体为S型花岗岩,且存在I型花岗岩,反映了岩浆活动的多样性.同时,成矿岩体富集 Rb、Ba、Th、U、K 和 Pb 等大离子亲石元素(LILE),亏损Nb、Ta、Ti等高场强元素(HFSE),显示出岛弧岩浆作用的特征.构造识别认为研究区内花岗岩形成于岛弧、陆缘弧环境,与大陆碰撞造山、后造山构造作用相关,形成年龄为(238±4)Ma(MSWD=3.8),形成时代属中三叠世.
Abstract
According to petrogeochemical studies,the rocks of Tsav lead-zinc ore in Mongolia are peraluminous and high potassium calc-alkaline series,with S-type granite and I-type granite as the main body,reflecting the diversity of magmation.Meanwhile,the ore-forming rock mass is rich in Rb,Ba,Th,U,K,Pb and other large ion lithophile elements(LILE),but poor in Nb,Ta,Ti and other high field strength elements(HFSE),which showed the features of island arc magmatism.Tectonic identification suggested that the granites in the study area were formed in the environment of island arc and continental margin arc,related to continental collision orogeny and postorogenic tectonics,and were formed in the Middle Triassic at the age of(238±4)Ma(MSWD=3.8).
关键词
蒙古国查夫铅锌矿/U-Pb年代学/地球化学/构造环境Key words
Tsav lead-zinc deposit in Mongolia/U-Pb chronology/geochemistry/tectonic environment引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据