From rifting to oceanic spreading in the Gulf of Aden: A synthesis

Leroy, Sylvie; Razin, Philippe; Bache, François; d’Acremont, Elia; Watremez, Louise; Robinet, Jean-Charles; Baurion, Céline; Denèle, Yoann; Bellahsen, Nicolas; Lucazeau, Francis; Rolandone, F.; Rouzo, S.; Kiel, Josep Serra i; Robin, Cécile; Guillocheau, François; Tiberi, Christel; Basuyau, C.; Beslier, Marie‐Odile; Ebinger, C. J.; Stuart, G. W.; Ahmed, Abdulhakim; Khanbari, Khaled; Ganad, I. Al; Clarens, Philippe de; Unternehr, Patrick; Toubi, K. Al; Lazki, A. Al

doi:10.1007/978-3-642-30609-9_20

Cited by 31 publications

(43 citation statements)

References 96 publications

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“…Fournier et al (2010) indicate that the age of the oceanic crust gets younger from east to west, with the age of emplacement of the spreading center (Sheba Ridge) varying from more than 20 Ma east of Socotra Island (north of Somalia) to less than 10 Ma at the longitude of the city of Aden. From Aden city to Afar there is an E-W propagator characterized by magnetic anomalies younger than 2.6 Ma (Leroy et al 2012). …”

Section: " "mentioning

confidence: 99%

“…On the other hand, there was communication " " between the Afar region and the Gulf of Aden through the open Indian Ocean in the east, such that the Late Miocene sea in the central Gulf of Aden had normal salinity and evaporites were not deposited. However, aridity was prevalent in the region from 10 to 5 Ma, and sabkha deposits are registered in some onshore rifts at the conjugate margins, e.g., Jiza-Qamar and Masilah basins in Oman, Berbera and Nogal grabens in Somalia (Leroy et al 2012).…”

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confidence: 99%

“…5). Cenozoic magmatism in Yemen and Saudi Arabia is inextricably linked to upwelling mantle plumes beneath Afar and to sea-floor spreading in the Gulf of Aden (with magnetic anomalies indicating ages 18 Ma; Leroy et al 2012) and the Red Sea (ages < 5 Ma). Surface uplift and extension of the Afro-Arabian plate and formation of the Gulf of Aden and the Red Sea were accompanied by widespread magmatism exceeding over > 1 million km 2 on the western Arabian plate, from Yemen in the south to Syria and Jordan in the north (Chazot et al 1998;Bosworth et al 2005).…”

Section: " "mentioning

confidence: 99%

“…These models suggest that oceanic crust is restricted to the axial graben where new crust is formed by diffuse extension (Cochran 1982) or by punctiform initiation of sea-floor spreading (Bonatti 1985). Some authors interpret that the early phases of oceanic crust development are probably related to oceanic propagators (Manighetti et al 1998;Mohriak 2001), whereas others assume a synchronous development of the rift basins along the margins (Leroy et al 2012).…”

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confidence: 99%

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Architecture of rifted continental margins and break-up evolution: insights from the South Atlantic, North Atlantic and Red Sea–Gulf of Aden conjugate margins

Mohriak

Leroy

2012

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To cite this version:Webster Ueipass Mohriak, Sylvie Leroy. Architecture of rifted continental margins and break-up evolution: insights from the South Atlantic, North Atlantic and Red Sea-Gulf of Aden conjugate margins. Special Publication -Geological Society of London, 2012, 369, pp.1-40. <10.1144/SP369.17>. !" " " ARCHITECTURE OF RIFTED CONTINENTAL MARGINS AND BREAKUP EVOLUTION: INSIGHTS FROM THE SOUTH ATLANTIC, NORTH ATLANTIC AND RED SEA -GULF OF ADEN CONJUGATE MARGINS

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Section: " "mentioning

confidence: 99%

Section: " "mentioning

confidence: 99%

Section: " "mentioning

confidence: 99%

mentioning

confidence: 99%

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Architecture of rifted continental margins and break-up evolution: insights from the South Atlantic, North Atlantic and Red Sea–Gulf of Aden conjugate margins

Mohriak

Leroy

2012

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“…The Gulf of Aden is a rifted margin between Africa and the Arabian Plate which separated at 34 Ma with the onset of seafloor spreading around 18 Ma (Leroy et al, 2012). Lucazeau et al (2010) reported high-quality heat flow measurements along eight seismic profiles near the margin of the Arabian Plate (near Dhofar), seven of which are aligned with the direction of spreading.…”

Section: Gulf Of Adenmentioning

confidence: 99%

The hydrothermal power of oceanic lithosphere

Grose

Afonso

2015

Solid Earth

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Abstract. We have estimated the power of ventilated hydrothermal heat transport, and its spatial distribution, using a set of recently developed plate models which highlight the effects of axial hydrothermal circulation and thermal insulation by oceanic crust. Testing lithospheric cooling models with these two effects, we estimate that global advective heat transport is about 6.6 TW, significantly lower than most previous estimates, and that the fraction of that extracted by vigorous circulation on the ridge axes ( < 1 My old) is about 50 % of the total, significantly higher than previous estimates. These new estimates originate from the thermally insulating properties of oceanic crust in relation to the mantle. Since the crust is relatively insulating, the effective properties of the lithosphere are "crust dominated" near ridge axes (a thermal blanketing effect yielding lower heat flow) and gradually approach mantle values over time. Thus, cooling models with crustal insulation predict low heat flow over young seafloor, implying that the difference of modeled and measured heat flow is due to the heat transport properties of the lithosphere, in addition to ventilated hydrothermal circulation as generally accepted. These estimates may bear on important problems in the physics and chemistry of the Earth because the magnitude of ventilated hydrothermal power affects chemical exchanges between the oceans and the lithosphere, thereby affecting both thermal and chemical budgets in the oceanic crust and lithosphere, the subduction factory, and the convective mantle.

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Incipient seafloor spreading segments: Insights from the Red Sea

Almalki

Betts

Aillères

2016

Geophysical Research Letters

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Crustal‐scale forward models of marine satellite potential field data suggest that the Red Sea comprises a single segment of ocean crust, which extends along ~60% of the Red Sea. The segment “tips” are bounded by continental crust, and there is no evidence for transforms at the segment terminations at the south. These observations indicate that ocean crust formation does not necessarily occur in response to wholesale tearing or “unzipping” of continental lithosphere nor is it necessarily controlled by preexisting transform faults. Ocean crust initiation occurs as a series of isolated segments that coalesce as the basin evolves. The recognition of this process in an orthogonal extension setting is comparable to spreading segmentation in modern ocean systems generated at a highly oblique convergent margin, suggesting that oceanic crust segmentation is not controlled by kinematic boundary conditions. The Red Sea may represent a combination of incipient type I and type II passive margins development.

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From rifting to oceanic spreading in the Gulf of Aden: A synthesis

Cited by 31 publications

References 96 publications

Architecture of rifted continental margins and break-up evolution: insights from the South Atlantic, North Atlantic and Red Sea–Gulf of Aden conjugate margins

Architecture of rifted continental margins and break-up evolution: insights from the South Atlantic, North Atlantic and Red Sea–Gulf of Aden conjugate margins

The hydrothermal power of oceanic lithosphere

Incipient seafloor spreading segments: Insights from the Red Sea

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