白城晚二叠世二长花岗岩地质特征、年代学及其地质意义  

The geological features,chronology and geological significance of Late Permian adamellite in Baicheng area

作　　者：张宁[1] 张建泽[1] 聂立军[1] ZHANG Ning;ZHANG Jian-ze;NIE Li-jun(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,Jilin,China)

机构地区：[1]吉林省区域地质矿产调查所,吉林长春130022

出　　处：《吉林地质》2020年第3期39-44,共6页Jilin Geology

基　　金：吉林省1∶5万大三家子(K51E004023)幅区域地质调查(DD20190042-5),所属二级项目辽东-吉中地区区域地质调查。

摘　　要：本文通过对白城地区那金-岭下-瓦房一带出露的二长花岗岩进行年代学和地球化学研究,并探讨了其成因及形成的构造背景。研究表明,白城那金岭下岩体主要岩石类型为二长花岗岩。本次工作取得单点测年数据为(275±4.6)Ma、(254±3.0)Ma,形成于晚二叠世。为过铝质钙碱性系列,认为与古亚洲洋闭合同碰撞造山密切相关。In this paper,based on the chronological and geochemical studies of adamellite in the Najin-Lingxia-Wafang area in Baicheng,the genesis and structural background of its formation are discussed.Studies have shown that the main rock type of the Najin-Lingxia rocks in Baicheng area is adamellite.The single-point dating data obtained in this work are(275±4.6)Ma and(254±3.0)Ma,which were formed in the Late Permian.It is peraluminescent calcium alkaline series,which is believed to be closely related to syn-collisional orogeny during closure of the ancient Asian Ocean.

关 键 词：白城地区 晚二叠世 同碰撞造山 

分 类 号：P536[天文地球—古生物学与地层学]