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王伟等,GEOLOGY,2021

发表时间:2021-11-26编辑:王德珲点击:

Fragmentation of South China from greater India during the Rodinia-Gondwana transition

作者

Wang, W (Wang, Wei) Cawood, PA (Cawood, Peter A.) Pandit, MK (Pandit, Manoj K.) Xia, XP (Xia, Xiaoping) Raveggi, M (Raveggi, Massimo) Zhao, JH (Zhao, Junhong) Zheng, JP (Zheng, Jianping) Qi, L (Qi, Liang)

(由 Clarivate 提供)

49

2

228-232

DOI

10.1130/G48308.1

出版时间

FEB 1 2021

文献类型

Article

摘要

Late Tonian to Cambrian sedimentary sequences in northwestern India and South China provide vital evidence for modeling their paleogeographic linkage, including their juxtaposition and subsequent separation during the transition from the Rodinia to the Gondwana supercontinents. Similarities in lithostratigraphy and detrital zircon U-Pb-Hf-O isotopic characteristics in the late Tonian sedimentary units from both regions underline a common provenance. A substantial decrease in zircon delta O-18 values from super- to sub-mantle compositions and simultaneous increase in the zircon epsilon(Hf(t)) values in South China and northwestern India for the 800-700 Ma time window suggest a common Neoproterozoic extensional magmatic event, corresponding with the Rodinia breakup. A distinct change in sedimentary provenance is noted during the Cryogenian period. Sedimentation along the northwestern margin of India for the remainder of the Neoproterozoic encompasses large volumes of clastic detritus dominated by old zircon ages, derived inboard from the Indian craton. In contrast, contemporaneous sedimentary units in the Yangtze region of South China are dominated by Neoproterozoic zircons. The detrital zircon age data underline a close paleogeographic linkage between northwestern India and South China (Yangtze and Cathaysia regions) in the Rodinia supercontinent configuration and argue for their separation through continental rifting during the Cryogenian. Northwestern India developed into a passive margin, whereas the South China block partially rifted, rotated, and migrated dextrally along the Gondwana margin toward northeastern India and Western Australia, such that the Cathaysia block continued to receive detritus from Gondwana continental regions.

关键词

作者信息

通讯作者地址

Wang, Wei

(通讯作者)

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

所属机构

China University of Geosciences

通讯作者地址

Wang, Wei

(通讯作者)

Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic 3800, Australia

电子邮件地址

wwz@cug.edu.cn

类别/分类

研究方向

Geology

基金资助