DOI: 10.1016/j.earscirev.2021.103622
论文题名: Mantle micro-block beneath the Indian Ocean and its implications on the continental rift-drift-collision of the Tethyan evolution
作者: Suo Y. ; Li S. ; Cao X. ; Liu Y. ; Zhu J. ; Li X. ; Somerville I.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2021
卷: 217 语种: 英语
中文关键词: Crustal thinning
; Indian Ocean
; Mantle micro-block
; Subduction kinematics
; Tethyan geodynamics
英文关键词: continental collision
; continental drift
; crustal thinning
; geodynamics
; mantle
; plate tectonics
; subduction
; tectonic evolution
; tectonic reconstruction
; Tethys
; Indian Ocean
; Tethys
英文摘要: A series of ancient Tethys ocean basins have been consumed beneath the Indian Ocean and are hard to observe due to their subduction below the southern Eurasian margin. The presence of the delaminated Gondwana fragments beneath the Indian Ocean also has long been suspected. These microplate tectonics lead to a fairly complex shallow crust and deep mantle configuration, which makes it difficult to reconstruct East Gondwana and discuss the geodynamics of continental rift-drift-collision in the Tethyan Realm. Lithospheric or crustal thinning due to the dehydration of the underlying stagnant slab is a good tracer of the subducted plate. Using the gravity-derived oceanic crust and Euler rotation method, we obtained an asymmetric crustal thickness across the Indian Ocean ridges. Areas of anomalous intra-plate crustal thinning were revealed and applied to track the possible subducted slabs. Then, combined with other geophysical data, two Meso-Tethyan slabs, one Neo-Tethyan slab, and two Indian slabs were delimited. From north to south, the slabs beneath India and the Northeast Indian Ocean constitute a south-dipping and step-shaped architecture. It requires a double subduction zone or a two-stage India-Eurasia collision model to be driven by the slab pull, which is still open for debate. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166515
Appears in Collections: 气候变化与战略
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作者单位: Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Lab of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; UCD School of Earth Sciences, University College Dublin, Belfield, Dublin 4, Ireland
Recommended Citation:
Suo Y.,Li S.,Cao X.,et al. Mantle micro-block beneath the Indian Ocean and its implications on the continental rift-drift-collision of the Tethyan evolution[J]. Earth Science Reviews,2021-01-01,217