气候变化领域集成服务门户(CCPortal): Polyphased mesozoic rifting from the Atlas to the north-west Africa paleomargin

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DOI	10.1016/j.earscirev.2021.103732
	Polyphased mesozoic rifting from the Atlas to the north-west Africa paleomargin
	Escosa F.O.; Leprêtre R.; Spina V.; Gimeno-Vives O.; Kergaravat C.; Mohn G.; Frizon de Lamotte D.
发表日期	2021
ISSN	0012-8303
卷号	220
英文摘要	Based on the interpretation of geological maps, seismic reflection and well data complemented with a bibliographic compilation and field work in the Rif, we investigate the factors that control the rift initiation, its development and the formation of oceanic crust in NW Africa. From SE to NW, we examine the Western Sahara Atlas, the Tendrara, the Guercif, and the Rif basins, to establish their geodynamic evolution in relation with the Mesozoic formation of the Central Atlantic and Maghrebian Tethys oceans, respectively. The Triassic extension was diffuse and developed over Lower Carboniferous horst-and-graben structures formed in the NW passive margin of Gondwana and involved in the subsequent late Carboniferous – early Permian Variscan orogenic system; suggesting that, at the onset of the Triassic rifting, the lithosphere was thermally re-equilibrated and replaced by more fertile lithospheric mantle. Afterwards, extension resumed in the Atlas system during middle to late Pliensbachian and finished during Toarcian. In the Rif and Guercif basins, the extension began later, mainly during the Toarcian, climaxing during Middle Jurassic times with the exhumation along low-angle extensional faults of CAMP gabbroic bodies and the final mantle exhumation during Upper Jurassic in the Rif. The study evidences the prominent role of the Variscan structural and thermal inheritance on the subsequent deformation events. Accordingly, the Paleozoic inverted basins and horsts localized the Triassic extension. From that, the opening of the Central Atlantic and Maghrebian Tethys oceans activated, respectively, the SE (Atlas) and NW (Tethys) rifted segments of the weakened continental crust where the Jurassic extension was gradually distributed. This led to the final formation of an oceanic domain in the NW paleomargin of Africa. © 2021 Elsevier B.V.
英文关键词	Initiation; Localization and development of rifts; NW Africa margin; Oceanic crust formation; Polyphased rift systems; Tectonic/thermal inheritance
语种	英语
scopus关键词	continental crust; continental margin; crustal structure; deformation mechanism; extensional tectonics; Mesozoic; rift zone; structural geology; Atlantic Ocean; Atlantic Ocean (Central); Maghreb; 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/209232
作者单位	Total SA, Centre Scientifique et Technique Jean Féger, Avenue Larribau, Pau, 64018, France; Université de Bourgogne Franche-Comté, Centre des Sciences de la Terre, UMR CNRS 6282 Biogéosciences, 6 Bd Gabriel, Dijon, 21000, France; CY Cergy Paris Université, Département Géosciences et Environnement (GEC), 1 rue Descartes, Neuville, Oise Cedex 95000, France
推荐引用方式 GB/T 7714	Escosa F.O.,Leprêtre R.,Spina V.,et al. Polyphased mesozoic rifting from the Atlas to the north-west Africa paleomargin[J],2021,220.
APA	Escosa F.O..,Leprêtre R..,Spina V..,Gimeno-Vives O..,Kergaravat C..,...&Frizon de Lamotte D..(2021).Polyphased mesozoic rifting from the Atlas to the north-west Africa paleomargin.EARTH-SCIENCE REVIEWS,220.
MLA	Escosa F.O.,et al."Polyphased mesozoic rifting from the Atlas to the north-west Africa paleomargin".EARTH-SCIENCE REVIEWS 220(2021).