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

DOI	10.1007/s11631-021-00458-2
	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
通讯作者	Zeng, YY (corresponding author), Lanzhou Resources & Environm Voc Tech Coll, Lanzhou 730000, Peoples R China.
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2021
卷号	40 期号:2 页码:199-211
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 (SO42-, 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 (similar to 164.0 to 160.9 Ma), dry (similar to 160.9 to 159.6 Ma), semi-dry (similar to 159.6 to 156.8 Ma). A similar warming climate scenario also occurred in eastern Tethys during the Callovian-Oxfordian transition (similar to 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 degrees N) and the Suowa formation (20.7 + 4.1/-3.7 degrees 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
收录类别	ESCI
WOS记录号	WOS:000621264500001
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352717
作者单位	[Zeng, Yongyao; Gao, Lei; Zhao, Wenqing] Lanzhou Resources & Environm Voc Tech Coll, Lanzhou 730000, Peoples R 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):199-211.
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.ACTA GEOCHIMICA,40(2),199-211.
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".ACTA GEOCHIMICA 40.2(2021):199-211.