气候变化领域集成服务门户(CCPortal): Paleo-Tethys subduction induced slab-drag opening the Neo-Tethys: Evidence from an Iranian segment of Gondwana

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DOI	10.1016/j.earscirev.2021.103788
	Paleo-Tethys subduction induced slab-drag opening the Neo-Tethys: Evidence from an Iranian segment of Gondwana
	Wan B.; Chu Y.; Chen L.; Liang X.; Zhang Z.; Ao S.; Talebian M.
发表日期	2021
ISSN	0012-8265
卷号	221
英文摘要	The Iranian plateau has a more straightforward relationship between the Paleo-Tethys and Neo-Tethys, than other regions in the Tethyan realm and is an ideal place to test the genetic connection of how the Paleo-Tethys affected the Neo-Tethys. Moreover, there is no consensus on how Paleo-Tethyan evolution influenced the Neo-Tethyan Wilson cycle. We studied the petrology, geochemistry, and metamorphic age of an eclogite suite at Rasht in northern Iran from the Paleo-Tethyan suture. The eclogitic protolith was a typical mid-ocean-ridge basalt and achieved its peak metamorphic condition of 2.7 GPa and 590 °C at 353 ± 8.9 Ma. Reconstructed pressure-temperature-time path of the eclogite-facies rocks suggests that the eclogitic protolith entered the trench at 356 ± 8.9 Ma. Mid-oceanic ridge rocks formed at ~380 Ma at the Rasht region and other places along the Alborz Mountain strike. A ~ 25 million years (Myr) period from the birth of oceanic crust to subduction at Rasht region implies that the mid-ocean-ridge was close to the trench. We propose that the Paleo-Tethyan mid-ocean-ridge was trench-parallelly subducted beneath the Eurasian boundary in northern Iran. This ridge-subduction propagated from east to west between 380 and 355 Ma. 47–27 Myr after ridge consumption, subduction of the remaining Paleo-Tethyan oceanic crust exerted a continuous extensional stress of ~0.1 GPa on the passive margin of Gondwana since the late Carboniferous. The drag-force eventually detached the Central Iranian Block from Gondwana, and opened the Neo-Tethyan ocean during the middle-late Permian. © 2021 Elsevier B.V.
英文关键词	Continental break-up; Paleo-Tethyan Ocean-ridge subduction; Slab-drag; Tethyan dynamics
语种	英语
scopus关键词	Tethys
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209194
作者单位	State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029, China; Geological Survey of Iran, Azadi Square, Meraj Blvd, Tehran, Iran
推荐引用方式 GB/T 7714	Wan B.,Chu Y.,Chen L.,et al. Paleo-Tethys subduction induced slab-drag opening the Neo-Tethys: Evidence from an Iranian segment of Gondwana[J],2021,221.
APA	Wan B..,Chu Y..,Chen L..,Liang X..,Zhang Z..,...&Talebian M..(2021).Paleo-Tethys subduction induced slab-drag opening the Neo-Tethys: Evidence from an Iranian segment of Gondwana.EARTH-SCIENCE REVIEWS,221.
MLA	Wan B.,et al."Paleo-Tethys subduction induced slab-drag opening the Neo-Tethys: Evidence from an Iranian segment of Gondwana".EARTH-SCIENCE REVIEWS 221(2021).