Transition from continental rifting to oceanic spreading in the northern Red Sea area

Abstract Lithosphere extension, which plays an essential role in plate tectonics, occurs both in continents (as rift systems) and oceans (spreading along mid-oceanic ridges). The northern Red Sea area is a unique natural geodynamic laboratory, where the ongoing transition from continental rifting to...

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Autores principales:	Sami El Khrepy, Ivan Koulakov, Taras Gerya, Nassir Al-Arifi, Mamdouh S. Alajmi, Ayman N. Qadrouh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ab6adb34c47a4a60a05dd17b90cb2667
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spelling	oai:doaj.org-article:ab6adb34c47a4a60a05dd17b90cb26672021-12-02T13:30:50ZTransition from continental rifting to oceanic spreading in the northern Red Sea area10.1038/s41598-021-84952-w2045-2322https://doaj.org/article/ab6adb34c47a4a60a05dd17b90cb26672021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84952-whttps://doaj.org/toc/2045-2322Abstract Lithosphere extension, which plays an essential role in plate tectonics, occurs both in continents (as rift systems) and oceans (spreading along mid-oceanic ridges). The northern Red Sea area is a unique natural geodynamic laboratory, where the ongoing transition from continental rifting to oceanic spreading can be observed. Here, we analyze travel time data from a merged catalogue provided by the Egyptian and Saudi Arabian seismic networks to build a three-dimensional model of seismic velocities in the crust and uppermost mantle beneath the northern Red Sea and surroundings. The derived structures clearly reveal a high-velocity anomaly coinciding with the Red Sea basin and a narrow low-velocity anomaly centered along the rift axis. We interpret these structures as a transition of lithospheric extension from continental rifting to oceanic spreading. The transitional lithosphere is manifested by a dominantly positive seismic anomaly indicating the presence of a 50–70-km-thick and 200–300-km-wide cold lithosphere. Along the forming oceanic ridge axis, an elongated low-velocity anomaly marks a narrow localized nascent spreading zone that disrupts the transitional lithosphere. Along the eastern margins of the Red Sea, several low-velocity anomalies may represent crustal zone of massive Cenozoic basaltic magmatism.Sami El KhrepyIvan KoulakovTaras GeryaNassir Al-ArifiMamdouh S. AlajmiAyman N. QadrouhNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sami El Khrepy Ivan Koulakov Taras Gerya Nassir Al-Arifi Mamdouh S. Alajmi Ayman N. Qadrouh Transition from continental rifting to oceanic spreading in the northern Red Sea area
description	Abstract Lithosphere extension, which plays an essential role in plate tectonics, occurs both in continents (as rift systems) and oceans (spreading along mid-oceanic ridges). The northern Red Sea area is a unique natural geodynamic laboratory, where the ongoing transition from continental rifting to oceanic spreading can be observed. Here, we analyze travel time data from a merged catalogue provided by the Egyptian and Saudi Arabian seismic networks to build a three-dimensional model of seismic velocities in the crust and uppermost mantle beneath the northern Red Sea and surroundings. The derived structures clearly reveal a high-velocity anomaly coinciding with the Red Sea basin and a narrow low-velocity anomaly centered along the rift axis. We interpret these structures as a transition of lithospheric extension from continental rifting to oceanic spreading. The transitional lithosphere is manifested by a dominantly positive seismic anomaly indicating the presence of a 50–70-km-thick and 200–300-km-wide cold lithosphere. Along the forming oceanic ridge axis, an elongated low-velocity anomaly marks a narrow localized nascent spreading zone that disrupts the transitional lithosphere. Along the eastern margins of the Red Sea, several low-velocity anomalies may represent crustal zone of massive Cenozoic basaltic magmatism.
format	article
author	Sami El Khrepy Ivan Koulakov Taras Gerya Nassir Al-Arifi Mamdouh S. Alajmi Ayman N. Qadrouh
author_facet	Sami El Khrepy Ivan Koulakov Taras Gerya Nassir Al-Arifi Mamdouh S. Alajmi Ayman N. Qadrouh
author_sort	Sami El Khrepy
title	Transition from continental rifting to oceanic spreading in the northern Red Sea area
title_short	Transition from continental rifting to oceanic spreading in the northern Red Sea area
title_full	Transition from continental rifting to oceanic spreading in the northern Red Sea area
title_fullStr	Transition from continental rifting to oceanic spreading in the northern Red Sea area
title_full_unstemmed	Transition from continental rifting to oceanic spreading in the northern Red Sea area
title_sort	transition from continental rifting to oceanic spreading in the northern red sea area
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ab6adb34c47a4a60a05dd17b90cb2667
work_keys_str_mv	AT samielkhrepy transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea AT ivankoulakov transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea AT tarasgerya transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea AT nassiralarifi transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea AT mamdouhsalajmi transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea AT aymannqadrouh transitionfromcontinentalriftingtooceanicspreadinginthenorthernredseaarea
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Transition from continental rifting to oceanic spreading in the northern Red Sea area

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