气候变化领域集成服务门户(CCPortal): Structure of the Offshore Obducted Oman Margin: Emplacement of Semail Ophiolite and Role of Tectonic Inheritance

CCPortal

DOI	10.1029/2020JB020187
	Structure of the Offshore Obducted Oman Margin: Emplacement of Semail Ophiolite and Role of Tectonic Inheritance
	Ninkabou D.; Agard P.; Nielsen C.; Smit J.; Gorini C.; Rodriguez M.; Haq B.; Chamot-Rooke N.; Weidle C.; Ducassou C.
发表日期	2021
ISSN	21699313
卷号	126 期号:2
英文摘要	The northern Oman margin is a key area for understanding the emplacement of the Semail Ophiolite and obduction processes in general. This study uses a grid of 2D-multichannel seismic lines tied to well data to characterize the offshore domain of the Semail Ophiolite and reappraises the obduction and post-obduction history of the Oman margin. West of Muscat, in the Sohar basin, the late Cretaceous to Paleogene tectonic mega-sequence records syn- to late-obduction stages and the deposition of erosional products of the autochthonous Arabian sediments, including a major mass transport complex. Syn-obduction thrusting is documented in this sector only, as a major fault emplacing a distal basement high (likely volcanic) onto Campanian sediments over >10 km. To the east, the Hatat and Tiwi basins are characterized by a less-copious Maastrichtian-Paleogene sequence. These basins developed above a domain characterized by the northern equivalent of the Saih Hatat dome and later extensional faults. This sector distinctively records the extensional phase associated with the exhumation and erosion of the subducted continental margin. The dichotomy between the two sectors is linked due to a structural high located offshore, in the continuation of the Semail Gap transfer fault. We propose that this transfer fault, coincident with a major Pan-African structure, affected the architecture of the passive margin during both rifting of the Neotethys and later ophiolite emplacement, that is, during (continental) subduction and obduction. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	obduction; offshore; ophiolite; sedimentary record; subduction
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187393
作者单位	Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France; Total SA, CSTJF, Pau, France; Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; Laboratoire de Géologie, Ecole Normale Supérieure, PSL Research, UMR CNRS 8538, Paris, France; Smithsonian Institution, Department of Paleobiology, Washington, DC, United States; Institute of Geosciences, Kiel University, Kiel, Germany; Department of Applied Geosciences, German University of Technology, Halban, Oman
推荐引用方式 GB/T 7714	Ninkabou D.,Agard P.,Nielsen C.,et al. Structure of the Offshore Obducted Oman Margin: Emplacement of Semail Ophiolite and Role of Tectonic Inheritance[J],2021,126(2).
APA	Ninkabou D..,Agard P..,Nielsen C..,Smit J..,Gorini C..,...&Ducassou C..(2021).Structure of the Offshore Obducted Oman Margin: Emplacement of Semail Ophiolite and Role of Tectonic Inheritance.Journal of Geophysical Research: Solid Earth,126(2).
MLA	Ninkabou D.,et al."Structure of the Offshore Obducted Oman Margin: Emplacement of Semail Ophiolite and Role of Tectonic Inheritance".Journal of Geophysical Research: Solid Earth 126.2(2021).