地质科技情报2018，Vol.37Issue(3)：44-50,7.DOI:10.19509/j.cnki.dzkq.2018.0306
青海多彩地区龙墨沟辉绿岩脉锆石U-Pb年代学及其地质意义
Zircon U-Pb Geochronology and Geological Implications of the Longmogou Diabase in Duocai Area, Qinghai Province
摘要
Abstract
The Duocai area is located in the northeastern margin of the Qiangtang terrane.In this area, Permian to Triassic magmatic rocks are widespread because of the subduction of Palaeo-Tethyan oceans and the final closure.We take the Longmogou diabase as the research object, and details the researches on its zircon U-Pb geochronology.The result shows that the diabase has crystalline age of (248.3±2.6) Ma and thus constrains its formation time to the Early Triassic.Cosidering previously published data, we suggest that the Longmogou diabase might have formed in a continental back-arc spreading environment of Longmucuo-Shuanghu ocean subduction.关键词
锆石U-Pb年代学/辉绿岩脉/龙木错-双湖洋/多彩地区/青海Key words
zircon U-Pb geochronology/diabase/Longmucuo-Shuanghu Ocean/Duocai area/Qinghai Province分类
天文与地球科学引用本文复制引用
刘晓阳,谭俊,王凤林,赵少卿,吴远安,李小亮..青海多彩地区龙墨沟辉绿岩脉锆石U-Pb年代学及其地质意义[J].地质科技情报,2018,37(3):44-50,7.基金项目
中国地质调查局项目"青海省多彩地区铜多金属矿整装勘查区关键基础地质研究"(科[2014]04-025-081) （科[2014]04-025-081）
