Deciphering the origin of the Cenozoic intracontinental rifting and volcanism in eastern China using integrated evidence from the Jianghan Basin

doi:10.1016/j.gr.2018.07.004

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Deciphering the origin of the Cenozoic intracontinental rifting and volcanism in eastern China using integrated evidence from the Jianghan Basin
	Wu, Lulu 1; Mei, Lianfu 1; Paton, Douglas A.2; Guo, Pengyuan 3; Liu, Yunsheng 4; Luo, Jin 4; Wang, Deliang 1; Li, Minghua 4; Zhang, Peng1 ; Wen, Hui 4
刊名	GONDWANA RESEARCH
	2018-12-01
卷号	64 页码:67-83
关键词	Intracontinental rifting Intracontinental volcanism Asthenospheric flow Jianghan Basin Eastern China
ISSN号	1342-937X
DOI	10.1016/j.gr.2018.07.004
通讯作者	Mei, Lianfu(lfmei@cug.edu.cn)
英文摘要	Intracontinental rifting and low-volume volcanism are a globally common phenomenon, yet the underlying driving mechanisms and whether they can be explained through classic plate tectonic concepts, remain hotly debated. A prominent example is the Cenozoic rift and volcanic province in eastern China. Using an integration of geological, geophysical and geochemical data, we unravel the spatial and temporal variations of the rifting and volcanism in the Jianghan Basin. Both rifting and volcanism in the Jianghan Basin show two intense-to-weak cycles (65-50 Ma and 50-26 Ma, respectively) with significant enhancement in activity during the late rift phase. Moreover, rifting and depocentres progressively migrated eastward. The Jianghan basalts all share an asthenospheric origin while the source of the late phase basalts is slightly more enriched and heterogenous in Nd-Hf isotopes than that of the early phase basalts. The late phase basalts also display a smaller extent of partial melting even under a thinner lithosphere, likely indicating a significant decrease of volatile content in the mantle source. Based on regional tectonic correlations, the main stages of tectonic evolution of the Jianghan Basin and eastern China are not synchronous with changes in Pacific plate motion, while they are coincident with India-Asia collision processes. These observations lead us to propose that the asthenospheric flow driven by India-Asia collision rather than the rollback of the subducted Pacific slab has caused the widespread rifting and volcanism in eastern China. The variations of rifting and volcanism ill the Jianghan Basin suggest a multiphase and eastward asthenospheric flow beneath eastern China driven by India-Asia collision, with an intense upwelling when passing through the North-South Gravity Lineament (NSGL). The much more intense rifting and volcanism during the late rift phase may indicate a much larger scale of volatile-poor asthenospheric flow than the early rift phase which could result in a more intense erosion of ancient enriched lithospheric mantle and the volatile content in the mantle source dropping sharply. This study provides an improved model based on our multidisciplinary observations for asthenospheric flow which may be an alternative driving mechanism for intracontinental rifting and low-volume volcanism in the regions where there are step changes in lithospheric thickness globally. (C) 2018 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
资助项目	Natural Science Foundation of Hubei Province[2016CFA084] ; Major National Science and Technology Programs, China[2016ZX05002-006] ; Scientific Research Project of China Petroleum and Chemical Corporation[P14111] ; National Natural Science Foundation of China (NSFC)[41776067]
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000454669700005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/155914]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Mei, Lianfu
作者单位	1.China Univ Geosci, Minist Educ, Key Lab Tecton & Petr Resources, Wuhan 430074, Hubei, Peoples R China 2.Univ Leeds, Basin Struct Grp, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.SINOPEC, Jianghan Oilfield Branch Co, Res Inst Explorat & Dev, Wuhan 430223, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wu, Lulu,Mei, Lianfu,Paton, Douglas A.,et al. Deciphering the origin of the Cenozoic intracontinental rifting and volcanism in eastern China using integrated evidence from the Jianghan Basin[J]. GONDWANA RESEARCH,2018,64:67-83.
APA	Wu, Lulu.,Mei, Lianfu.,Paton, Douglas A..,Guo, Pengyuan.,Liu, Yunsheng.,...&Wen, Hui.(2018).Deciphering the origin of the Cenozoic intracontinental rifting and volcanism in eastern China using integrated evidence from the Jianghan Basin.GONDWANA RESEARCH,64,67-83.
MLA	Wu, Lulu,et al."Deciphering the origin of the Cenozoic intracontinental rifting and volcanism in eastern China using integrated evidence from the Jianghan Basin".GONDWANA RESEARCH 64(2018):67-83.