Lithospheric petrology beneath the northern part of the Arabian Plate in Syria: evidence from xenoliths in alkali basalts

Nasir, Sobhi; Safarjalani, Abdulrahman

doi:10.1016/s0899-5362(00)00013-0

Cited by 50 publications

(48 citation statements)

References 54 publications

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“…By analogy with neighbouring parts of Syria, this observation is interpreted (e.g. Best et al, 1990;Nasir and Safarjalani, 2000;al-Mishwat and Nasir, 2004) in terms of~40 km thick crust, with a high-density basal layer of mafic underplating at least 10 km thick. Using standard theory for heat flow through the crust (e.g.…”

Section: Uplift Modellingmentioning

confidence: 87%

Late Cenozoic regional uplift and localised crustal deformation within the northern Arabian Platform in southeast Turkey: Investigation of the Euphrates terrace staircase using multidisciplinary techniques

et al. 2012

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Section: Uplift Modellingmentioning

confidence: 87%

Late Cenozoic regional uplift and localised crustal deformation within the northern Arabian Platform in southeast Turkey: Investigation of the Euphrates terrace staircase using multidisciplinary techniques

et al. 2012

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“…Although the regions under consideration are not identical geologically and have slightly different thicknesses and compositions of the crust, their crustal structure and lithosphere composition (e.g., Gettings et al, 1986;Mechie et al, 1986;Nasir and Safarjalani, 2000) are too similar to account for heat-flow variations in the order of 50 mW m -2 . It is this broad similarity in lithosphere structure and composition that leads us to conclude that a value of 60 mW m -2 may not just express the conductive surface heat flow in southern Jordan, but typifies the Arabian Shield unaffected by younger geodynamic reactivation.…”

Section: Discussionmentioning

confidence: 99%

The surface heat flow of the Arabian Shield in Jordan

Förster

Masarweh

et al. 2007

Journal of Asian Earth Sciences

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“…Its origin is likely related to a zone of mantle decompression caused by the northward motion of the Arabian Plate with respect to Africa along the Aqaba-Dead Sea transform (Ilani et al 2001). Beneath the harrat, the continental crust is about 40 km thick and is made up primarily of granulitic (lower crustal) and granitic (upper crustal) rocks (McGuire and Bohannon 1989;Nasir and Safarjalani 2000;Al-Mishwat and Nasir 2004) with some sedimentary rocks at the top (Pellaton 1981). The upper mantle is formed of spinel and garnet peridotites (Kuo and Essene 1986;Al-Mishwat and Nasir 2004).…”

Section: Geological and Hydrological Background Tectonic Settingmentioning

confidence: 99%

The Al-Du’aythah volcanic cones, Al-Madinah City: implications for volcanic hazards in northern Harrat Rahat, Kingdom of Saudi Arabia

et al. 2015

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The basaltic Al-Du'aythah volcanic cones lie in the northern part of the extensive lava field of Harrat Rahat, and only 13 km from the centre of Al-Madinah City, in the Kingdom of Saudi Arabia. Historical records indicate they may have erupted in AD 641. The four cones are formed by deposits that record a transition from phreatomagmatic to magmatic explosions followed by minor lava effusion. Three cones display elongated tuff rings at the base, and two produced late-stage lava flows. The cones themselves are symmetrical and constructed mostly by the accumulation of ballistically ejected pyroclasts. Spherical bombs and lapilli (cannonball bombs/lapilli), occasionally with country-rock fragments inside (both cored and loaded bombs/lapilli) are common within the tuff ring deposits. LiDAR data show a total volume of 1,664×10 −6 km 3 for the four cones (418×10 −6 km 3 DRE). Whole-rock chemical analyses indicate alkali-basalt compositions (SiO 2 44.7-45.9 wt%), with little compositional variation and no relationship between chemistry and eruptive styles. Small differences in composition may reflect variations in fractional crystallisation of clinopyroxene and olivine. A magnetotelluric 2D cross-section shows that the cones are located adjacent to a buried sediment-filled alluvial channel along a NNW-SSE fault dipping to the east. The AlDu'aythah eruption was related to the ascent of magma through this structure, with the first phase of the eruption triggered by the interaction of the magma with water from the northern Harrat Rahat aquifer that exists in the AlMadinah basin. This initial water source was rapidly exhausted, while the eruption progressed roughly from north to south and from west to east, the latter motion probably along the fault-controlled feeding dyke. Our work draws attention to the existence of recent explosive phreatomagmatic eruptions in the Al-Madinah basin, which, despite the hyperarid climate of the area, must be considered a potential future eruption hazard.

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Lithospheric petrology beneath the northern part of the Arabian Plate in Syria: evidence from xenoliths in alkali basalts

Cited by 50 publications

References 54 publications

Late Cenozoic regional uplift and localised crustal deformation within the northern Arabian Platform in southeast Turkey: Investigation of the Euphrates terrace staircase using multidisciplinary techniques

Late Cenozoic regional uplift and localised crustal deformation within the northern Arabian Platform in southeast Turkey: Investigation of the Euphrates terrace staircase using multidisciplinary techniques

The surface heat flow of the Arabian Shield in Jordan

The Al-Du’aythah volcanic cones, Al-Madinah City: implications for volcanic hazards in northern Harrat Rahat, Kingdom of Saudi Arabia

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