Geochronological evidence for existence of South Mongolian microcontinent——A zircon U-Pb age of grantoid gneisses from the Yagan-Onch Hayr-han metamorphic core complex  

作　　者：WANG Tao ZHENG Yadong G.E.Gehrels MU Zhiguo 

机构地区：[1]Department of Geology,Peking University,Beijing 100871,China [2]Department of Geology,University of Arizona,Tucson,Arizona,AZ85721,USA

出　　处：《Chinese Science Bulletin》2001年第23期2005-2008,共4页

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 49872072) ; the Postdoctoral Foundation of China, as well as U.S. National Science Foundation (Grant No. EAR-9903012).

摘　　要：A zircon U-Pb age of (916±16) Ma is measured for grantoid gneisses from the Yagan-Onch Hayrhan metamorphic core complex and represents the crystallization age of the grantoid magma. This age provides evidence for the existence of the South Mongolian microcontinent, which is consistent with the analysis of the regional geology.A zircon U-Pb age of (916±16) Ma is measured for grantoid gneisses from the Yagan-Onch Hayrhan metamorphic core complex and represents the crystallization age of the grantoid magma. This age provides evidence for the existence of the South Mongolian microcontinent, which is consistent with the analysis of the regional geology.

关 键 词：zircon U-PB age PROTEROZOIC gniesses SOUTH MONGOLIAN microcontinent. 

分 类 号：P597[天文地球—地球化学]