气候变化领域集成服务门户(CCPortal): On the origin and consequences of crustal-scale extension between Africa and Sicily since Late Miocene: insights from the Kaboudia area, western Pelagian Sea

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DOI	10.1016/j.tecto.2020.228565
	On the origin and consequences of crustal-scale extension between Africa and Sicily since Late Miocene: insights from the Kaboudia area, western Pelagian Sea
	Arab M.; Maherssi C.E.; Granjeon D.; Roure F.; Déverchère J.; Cuilhé L.; Hassaim M.; Mouchot N.; Doublet S.; Khomsi S.
发表日期	2020
ISSN	00401951
卷号	795
英文摘要	The eastern Tunisian shelf is located between the Gulf of Hammamet and the Gulf of Gabes and belongs to the Pelagian domain which underwent a continuous NE-directed extension and crustal thinning since Late Miocene. This geodynamic process induced the formation of NW striking normal faults and associated grabens both in the Tunisian Atlas and the Pelagian domain, including the Sicily Channel rifting zone (SCRZ). In this study, we combine regional stratigraphy from seismic reflection profiles, focal mechanisms, space geodetic measurements (GNSS) and thermal indicators from well data to propose a backward tectonic reconstitution of the Pelagian domain. The thinning of the continental crust is demonstrated by gravity inversion integrating published seismic refraction profiles. By completing the interpretation of tectono-stratigraphic records, we highlight a northeastward propagation of extension prevailing within the Pelagian shelf from Messinian to Plio-Quaternary times. We suggest that extensional tectonics is explained by (1) eastward slab tearing between the African continental lithosphere and the Tethyan oceanic slab, allowing asthenospheric upwelling, and (2) forces arising from relative motions between Nubia and the Hyblean-Malta block. The decoupling of these domains since Late Miocene likely results from a combination of the NW-directed plate convergence, inherited rheological contrasts within the continental crust, and weakening arising from mantle flow induced by the Tethyan slab rollback and tearing. © 2020 Elsevier B.V.
关键词	Crustal thinning Kinematics NE extension Pelagian shelf Tectono-stratigraphic records
英文关键词	Lithology; Seismology; Stratigraphy; Structural geology; Tectonics; Continental crusts; Continental lithosphere; Extensional tectonics; Geodetic measurements; Geodynamic process; Seismic reflection profiles; Seismic refraction; Stratigraphic records; Geodynamics; data inversion; extensional tectonics; focal mechanism; Miocene; normal fault; rifting; tectonic evolution; tectonic setting; tectonophysics; tectonostratigraphy; Africa; Agrigento; Italy; Mediterranean Sea; Pelagi Islands; Sicily; Pelagia
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207707
作者单位	Sonatrach/Exploration Division, Avenue du 1er novembre Bat ‘C' BP 68, Boumerdes, Algeria; Numhyd a.r.l. Sonatrach/Etap JV Company, Lac Leman, Leman Center tower, Lac1, Tunis, Tunisia; IFP-Energies Nouvelles, Rueil-Malmaison, Paris, France; Univ Brest, CNRS, Lab Géosciences Océan, Plouzané, F-29280, France; Beicip Franlab, Rueil-Malmaison, Paris, France; King Abdulaziz university (KAU), Faculty of earth Sciences, Geoexploration Department, Jeddah, Saudi Arabia
推荐引用方式 GB/T 7714	Arab M.,Maherssi C.E.,Granjeon D.,et al. On the origin and consequences of crustal-scale extension between Africa and Sicily since Late Miocene: insights from the Kaboudia area, western Pelagian Sea[J],2020,795.
APA	Arab M..,Maherssi C.E..,Granjeon D..,Roure F..,Déverchère J..,...&Khomsi S..(2020).On the origin and consequences of crustal-scale extension between Africa and Sicily since Late Miocene: insights from the Kaboudia area, western Pelagian Sea.Tectonophysics,795.
MLA	Arab M.,et al."On the origin and consequences of crustal-scale extension between Africa and Sicily since Late Miocene: insights from the Kaboudia area, western Pelagian Sea".Tectonophysics 795(2020).