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。
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).
作者
王宏明
WANG Hongming(Inner Mongolia Coal Geological Exploration(Group)472 Co.,Ltd.,Tongliao 028000,Inner Mongolia,China)
出处
《资源信息与工程》
2024年第1期22-25,29,共5页
Resource Information and Engineering
关键词
蒙古国查夫铅锌矿
U-PB年代学
地球化学
构造环境
Tsav lead-zinc deposit in Mongolia
U-Pb chronology
geochemistry
tectonic environment
