干旱区生态环境知识资源中心(Arid): Paleoclimate evolution and aridification mechanism of the eastern Tethys during the Callovian-Oxfordian:evidence from geochemical records of the Qiangtang Basin,Tibetan Plateau

Arid

	Paleoclimate evolution and aridification mechanism of the eastern Tethys during the Callovian-Oxfordian:evidence from geochemical records of the Qiangtang Basin,Tibetan Plateau
	Zeng Yongyao; Gao Lei; Zhao Wenqing
来源期刊	中国地球化学学报
ISSN	2096-0956
出版年	2021
卷号	40 期号:2 页码:2096-0956
英文摘要	Global climate during the Jurassic has been commonly described as a uniform greenhouse climate for a long time.However,the climate scenario of a cool episode during the Callovian-Oxfordian transition following by a warming trend during the Oxfordian(163.53 to 157.4 Ma)is documented in many localities of the western Tethys.It is still unclear if a correlatable climate scenario also occurred in the eastern Tethys during the same time interval.In this study,a detailed geochemical analysis on the 1060 m thick successions(the Xiali and Suowa formations)from the Yanshiping section of the Qiangtang Basin,located in the eastern Tethys margin during the Callovian-Oxfordian periods,was performed.To reveal the climate evolution of the basin,carbonate content and soluble salt concentrations(SO_4~(2-),Cl-)were chosen as climatic indices.The results show that the overall climate patterns during the deposition of the Xiali and Suowa formations can be divided into three stages:relatively humid(~ 164.0 to 160.9 Ma),dry(~ 160.9 to 159.6 Ma),semi-dry(~ 159.6 to 156.8 Ma).A similar warming climate scenario also occurred in eastern Tethys during the Callovian-Oxfordian transition(~ 160.9 to 159.6 Ma).Besides,we clarify that the Jurassic True polar wander(TPW),the motion of the lithosphere and mantle with respect to Earth's spin axis,inducing climatic shifts were responsible for the aridification of the Qiangtang Basin during the Callovian-Oxfordian transition with a review of the paleolatitude of the Xiali formation(19.7 + 2.8/-2.6° N)and the Suowa formation(20.7 + 4.1/-3.7° N).It is because the TPW rotations shifted the East Asia blocks(the North and South China,Qiangtang,and Qaidam blocks)from the humid zone to the tropical/subtropical arid zone and triggered the remarkable aridification during the Middle-Late Jurassic(ca.165-155 Ma).
英文关键词	Qiangtang basin The Callovian-Oxfordian Geochemistry Paleolatitude Paleoclimate
类型	Article
语种	英语
国家	中国
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:6942109
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354554
作者单位	Zeng Yongyao, Lanzhou Resources and Environment Voc-Tech College, Lanzhou, Gansu 730000, China.; Gao Lei, Lanzhou Resources and Environment Voc-Tech College, Lanzhou, Gansu 730000, China.; Zhao Wenqing, Lanzhou Resources and Environment Voc-Tech College, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Zeng Yongyao,Gao Lei,Zhao Wenqing. Paleoclimate evolution and aridification mechanism of the eastern Tethys during the Callovian-Oxfordian:evidence from geochemical records of the Qiangtang Basin,Tibetan Plateau[J],2021,40(2):2096-0956.
APA	Zeng Yongyao,Gao Lei,&Zhao Wenqing.(2021).Paleoclimate evolution and aridification mechanism of the eastern Tethys during the Callovian-Oxfordian:evidence from geochemical records of the Qiangtang Basin,Tibetan Plateau.中国地球化学学报,40(2),2096-0956.
MLA	Zeng Yongyao,et al."Paleoclimate evolution and aridification mechanism of the eastern Tethys during the Callovian-Oxfordian:evidence from geochemical records of the Qiangtang Basin,Tibetan Plateau".中国地球化学学报 40.2(2021):2096-0956.