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马强等,PRECAMBRIAN RESEARCH,2021

发表时间:2021-11-25编辑:王德珲点击:

 

Precambrian crust growth and reworking of the eastern Yangtze Craton: insights from xenocrystic zircons in the lamprophyres from the Middle-Lower Yangtze Belt, China

作者

Zhang, ST (Zhang, Shitao)   Ma, Q (Ma, Qiang)   Chen, HY (Chen, Huayong)   Long, XP (Long, Xiaoping)   Chu, GB (Chu, Gaobin)   Cheng, JM (Cheng, Jiamin)   Xia, XP (Xia, Xiaoping)   Li, RC (Li, Rucao)  

(由 Clarivate 提供)

 

355  

文献号

106121

DOI

10.1016/j.precamres.2021.106121

出版时间

APR 2021

文献类型

Letter

摘要

Continental mafic igneous rocks and their xenocrysts provide information on the evolution of deep continent. Here we present new in situ U-Pb and Hf-O isotopes data for xenocrystic zircons discovered from the Late Mesozoic ultrapotassic to K-rich lamprophyres (150 similar to 140 Ma) in the eastern Yangtze Craton to address the poorly understood yet critical issue about the nature, age and evolution of the regional continental crust. The zircon xenocrysts define episodic distribution of Precambrian ages at 2.61 similar to 2.50 Ga, 2.47 similar to 1.63 Ga, 1.13 similar to 1.00 Ga and 0.88 similar to 0.73 Ga, with two-stage model ages of Hf isotopes ranging from 3.19 to 1.61 Ga. The presence of Archean and Paleoproterozoic xenocrystic zircons reveal that the deep crust is probably older than the surface exposures (<= 1.0 Ga) and the Archean-Paleoproterozoic crustal materials maybe widespread in the eastern Yangtze Craton. Hf-O isotopes of the studied Paleoproterozoic and Neopmterozoic xenocrystic zircons, as well as other contemporary xenocrystic zircons from late Mesozoic igneous rocks in the literatures, record the important crust growth and reworking in the eastern Yangtze Craton. The lamprophyres and their xenocrysts provide an important proxy archive of the history of deep continental crust in the eastern Yangtze Craton.

关键词

 

作者信息

通讯作者地址

Chen, Huayong    

(通讯作者)

Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China    

通讯作者地址

Ma, Qiang    

(通讯作者)

China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Sch Earth Sci, Wuhan 430074, Peoples R China    

通讯作者地址

Ma, Qiang    

(通讯作者)

CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China    

通讯作者地址

Chen, Huayong    

(通讯作者)

Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China    

 

电子邮件地址

maqiang@cug.edu.cn   huayongchen@gig.ac.cn  

类别/分类

研究方向

Geology

基金资助