Complex evolution of the lower crust beneath the southeastern North China Craton: The Junan xenoliths and xenocrysts: Comment

被引:0
|
作者
Yuan, Ya-Juan
Xia, Bin [1 ]
机构
[1] Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510275, Guangdong, Peoples R China
关键词
Sulu UHP terrane; Zircon geochronology; Hf isotopes; Lithospheric structure; Yangtze craton; SULU UHPM BELT; TANLU FAULT; COLLISION; SUBDUCTION; EASTERN; BLOCKS; MANTLE; HF;
D O I
10.1016/j.lithos.2015.02.026
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The Junan granulite xenoliths and xenocrysts have a distinct overlap in U-Pb ages and Lu-Hf isotopic compositions with the Precambrian basement of the Yangtze craton. We thus believe that the Junan granulite cannot be derived from the North China lower crust. Moreover, broad deep seismic and magnetotelluric probing across the Sulu UHP terrane indicates the former is well coupled with the lower crust of the Yangtze craton. Therefore, we suggest that the Junan granulites are most likely to have been derived from the Yangtze Precambrian basement and their zircon U-Pb-Lu-Hf isotope systematics are more likely to indicate the complex evolution of the Precambrian lower crust along the northern margin of the Yangtze craton. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:93 / 95
页数:3
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