Transverse structures in the central part of the Red Sea and implications on early stages of oceanic accretion

Izzeldin, A.Y.

doi:10.1111/j.1365-246x.1989.tb05254.x

Cited by 27 publications

(28 citation statements)

References 12 publications

(14 reference statements)

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“…The Deeps are separated by shallower 'Inter-Trough Zones' where the sediment sequences from the flanks cover the axial trough (e.g. Tramontini and Davies, 1969;Searle and Ross, 1975;Izzeldin, 1989;Ligi et al, 2012;Augustin et al, 2014). North of 23.5°N the Deeps are more widely separated and basalt is only found in isolated places (Bannock, Mabahiss and Shaban Deeps; Bonatti et al, 1984;Pautot et al, 1984;Guennoc et al, 1988;Cochran, 2005, see also Fig.…”

Section: Geological Setting Of the Red Sea Riftmentioning

confidence: 95%

Hydrothermal activity at the ultraslow- to slow-spreading Red Sea Rift traced by chlorine in basalt

et al. 2015

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Section: Geological Setting Of the Red Sea Riftmentioning

confidence: 95%

Hydrothermal activity at the ultraslow- to slow-spreading Red Sea Rift traced by chlorine in basalt

et al. 2015

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“…1981), as well as four transform fault azimuths in the Red Sea (Izzeldin 1989), two slip vectors of earthquakes, and two spreading rates (Iueldin 1987) (see Table 1). …”

Section: Africa S O M a L I A A R A B I A A N D T H E A F A R Tripmentioning

confidence: 99%

“…The ARAB-AFRI relative motion was determined using the trends of left-lateral strike-slip faults arranged en kchelon within the Levant leaky transform zone (Garfunkel et al 1981) and one slip rate along the Levant Fault, based on the lengths of activc rhomb-grabens and the age of their sedimentary fill (Garfunkel ef ul. 1981), as well as four transform fault azimuths in the Red Sea (Izzeldin 1989), two slip vectors of earthquakes, and two spreading rates (Iueldin 1987) (see Table 1).…”

Section: Red Sea and The Levant Faultmentioning

confidence: 99%

The Somalia plate and the East African Rift System: present-day kinematics

Jestin

Huchon

Gaulier

1994

Geophysical Journal International

231

191

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S U M M A R YT h e motion of the Somalia plate relative t o the Nubia (Africa), Arabia and Antarctica platcs is re-evaluated using a new inversion method based o n a Monte Carlo technique and a least absolute value misfit criterion. A subset of the N U V E L 1 data set, with additional data along the Levant Fault and in the Red Sea is used. T h e results confirm that the motion of Arabia with respect to Africa is significantly different from the motion relative t o Somalia. It is further shown that the data along the SW Indian Ridge are compatible with a pole of relative motion between Africa and Somalia located close t o the hypothetical diffuse triple junction between the ridge and thc East African Rift. T h e resulting Africa-Somalia motion is then compatible with the geological structures and seismological data along the East African Rift system. Assuming a separate Somalia plate thus solves kinematic and geological problems around the Afar triple junction and along the East African Rift.

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“…The central Red Sea oceanic deeps also reach depths of greater than 2000 m and are floored by oceanic basalt [ Bicknell et al , 1986]. However, they are separated by “intertrough zones” which are shallower, broader, and covered with highly faulted sediments including both the Miocene evaporites and post‐Miocene pelagic sediments [ Searle and Ross , 1975; Izzeldin , 1989].…”

Section: Geological Setting Of the Red Sea Riftmentioning

confidence: 99%

Northern Red Sea: Nucleation of an oceanic spreading center within a continental rift

Cochran

2005

Geochem Geophys Geosyst

107

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[1] The northern Red Sea is an amagmatic continental rift in which an oceanic spreading center is beginning to develop. A new compilation of marine geophysical data permits delineation of the structure of the northern Red Sea and of the manner in which the transition from continental to oceanic extension is occurring in this rift. The margins of the northern Red Sea are formed by large, apparently active faults on the seaward edge of the narrow continental shelves. The morphology of the main trough is a series of terraces stepping down to an axial depression. The terraces are a subdued expression of the basement structure, which consists of a series of large rotated fault blocks. The axial depression is an often faultbounded axis of deep water that extends south from the Suez triple junction. The rift is segmented alongstrike by throughgoing accommodation zones spaced at 40-60 km intervals along the rift. In the main trough, accommodation zones truncate or offset rift-parallel bathymetric and gravity features. The axial depression consists of a series of discrete depressions offset from each other and separated by slightly shallower areas corresponding to accommodation zones. Within each segment, the axial depression deepens away from the accommodation zones toward a small deep, a few kilometers across and a few hundred meters deeper than the surrounding seafloor. A pair of small volcanoes is perched on top of the scarps bounding the axial depression on either side of the deep within each segment. The volcanoes are all normally magnetized and interpreted as very young. The crust is uniformly thin (5-8.5 km) throughout the main trough, implying extension evenly spread across the rift through much of its development. As extension recently became concentrated at the axis, melt began to be generated and is focused to a location within the segment where it ascends along faults bounding the axial depression to form the pair of volcanoes flanking the axis. A volcano is also found on the floor of the axial depression in one segment. This isolated volcano appears to be the first step in the development of the seafloor spreading cells that are observed in the central Red Sea. The individual cells then grow and coalesce to become a continuous spreading axis.Components: 17,282 words, 24 figures.

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Transverse structures in the central part of the Red Sea and implications on early stages of oceanic accretion

Cited by 27 publications

References 12 publications

Hydrothermal activity at the ultraslow- to slow-spreading Red Sea Rift traced by chlorine in basalt

Hydrothermal activity at the ultraslow- to slow-spreading Red Sea Rift traced by chlorine in basalt

The Somalia plate and the East African Rift System: present-day kinematics

Northern Red Sea: Nucleation of an oceanic spreading center within a continental rift

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