Sedimentological characteristics and morphology of the aeolian sand dunes in the eastern part of the UAE, a case study from Ar Rub' Al Khali

El-Sayed, Mohamed I.

doi:10.1016/s0037-0738(98)00116-x

Cited by 57 publications

(36 citation statements)

References 21 publications

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“…Alsharhan et al (1998) proposed that a significant amount of the terrestrial input had come from further afield (southern Iraq/northern Saudi Arabia), based on evidence from granulometry and grain surface textures. The mineralogy of these samples also suggests a mixed metamorphic terrain, with some input from north of the Persian Gulf El-Sayed, 1999). This sediment could have reached the northern Emirates during times of low sea level, when the Gulf, a shallow tectonic depression formed in the late Tertiary in front of the rising Zagros Mountains (Uchupi et al, 1999), was empty.…”

Section: Sources Of Sand For the Northeastern Rub' Al Khalimentioning

confidence: 83%

Mapping the geochemistry of the northern Rub' Al Khali using multispectral remote sensing techniques

White

Goudie

Parker

et al. 2001

Earth Surf Processes Landf

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Spatial variations in sand sea geochemistry relate to mixing of different sediment sources and to variations in weathering. Due to problems of accessibility, adequate spatial coverage cannot be achieved using field surveys alone. However, maps of geochemical composition produced from remotely sensed data can be calibrated against limited field data and the results extrapolated over large, inaccessible areas. This technique is applied to part of the Rub' Al Khali in the northern United Arab Emirates. Trend surface analysis of the results suggests that the sand sea at this location can be modelled as an east-west mixing zone of two spectral components: terrestrial reddened quartz sands and marine carbonate sands. Optical dating of these sediments suggests that dune emplacement occurred rapidly around 10 ka BP, when sea level was rising rapidly. The spatial distribution of mineralogical components suggests that this phase of dune emplacement resulted from coastal dune sands being driven inland during marine transgression, thereby becoming mixed with rubified terrestrial sands.

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Section: Sources Of Sand For the Northeastern Rub' Al Khalimentioning

confidence: 83%

Mapping the geochemistry of the northern Rub' Al Khali using multispectral remote sensing techniques

White

Goudie

Parker

et al. 2001

Earth Surf Processes Landf

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“…In this study lf is used as a proxy for stability in the surrounding dune-fields, with values primarily controlled by the accretion of Fe-rich quartz during periods of dune remobilisation Preston et al, 2012), and may in turn be linked to variations in vegetation cover, precipitation, sediment supply and/or wind strength (Tsoar, 2005;Yizhaq et al, 2009). Reduced detrital input is also inferred by below average Al, Fe, and Ti values, which correspond to the abundance of quartz, feldspars and sheet silicates, all of which are common components of the dune sands in the northern Emirates (El-Sayed, 1999;Garzanti et al, 2003;Farrant et al, 2013Farrant et al, , 2015. It is proposed that these minerals are largely inert with respect to the lake system and thus can also be used to monitor stability in the surrounding dune-fields.…”

Section: 22mentioning

confidence: 99%

A multi-proxy analysis of the Holocene humid phase from the United Arab Emirates and its implications for southeast Arabia's Neolithic populations

Preston

Thomas

Goudie

et al. 2015

Quaternary International

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An early-to mid-Holocene humid phase has been identified in various Arabian geoarchives, although significant regional heterogeneity has been reported in the onset, duration and stability of this period. A multi-proxy lake and dune record from Wahalah in the United Arab Emirates (UAE) documents significant variations in hydrology, biological productivity and landscape stability during the first half of the Holocene. These data reveal that post-Last Glacial Maximum dune emplacement continued into the earliest part of the Holocene, with the onset of permanent lacustrine sedimentation at the site commencing ~8.5 ka cal. BP. A long-term shift towards more arid conditions is inferred between ~7.8 -5.9 ka cal. BP, with intermittent flooding of the basin and distinct phases of instability throughout the catchment area. This transition is linked to the southwards migration of the Intertropical Convergence Zone (ITCZ) and associated weakening of monsoon rains. A peak in landscape instability is recorded between ~5.9 -5.3 ka cal. BP and is marked by a pronounced increase in regional dune emplacement. These variations are considered alongside the record of human settlement raising important questions *Manuscript Click here to view linked References about the interactions between population demographics, climate and environment in southeast Arabia during the Neolithic.

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“…We have used a dry-sieve analysis to determine the particle size distribution [8], or grading, of the sample. To obtain a grading, the aggregate is shaken through a series of sieves, nested one above the other in order of increasing opening size.…”

Section: Grain Size Analysismentioning

confidence: 99%

Valorization of Algerian Sand for Photovoltaic Application

et al. 2016

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Extracting quartz from sand, as well as extracting silicon from quartz requires knowledge of the physical and chemical properties of quartz found in the sand. In this work the chemical composition, the crystallographic phase, crystal system, space group, unit cell parameters, the absorption bands, the granulometric analysis and the microscopic observations of quartz in the sand from Mostaganem (Algeria) region have been carried out using X-ray fluorescence, X-ray diffraction, infrared spectroscopy, sifting, optical and scanning electron microscopy in order to determine the rate and the nature the crystallinity of its various components and to discover a layer rich in silica, containing a sufficient reserve to feed a unit manufacturing pure silicon starting from silica. The study is driven by current economic importance of the silicon application in the field of photovoltaic solar cells. The X-ray fluorescence indicates that Mostaganem sand has got a very good purity (99.5% silica). The crystallographic parameters of Mostaganem sand have been determined through analysis of X-ray diffraction. The following parameters were found, hexagonal crystal system, space group P3221, unit cell parameters: a = b = 4.9030 Å, c = 5.3999 Å. The infrared absorption spectrum of studied sand exhibits absorption bands characterizing the SiO2 compound, due to Si-O-Si and Si-O aggregates and others. The granulometric analysis determines the percentage of the various fraction of the grain. The microscopy observation gives the shape of the grain. The results show finally that Mostaganem sand has got good proprieties for the photovoltaic application.

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Sedimentological characteristics and morphology of the aeolian sand dunes in the eastern part of the UAE, a case study from Ar Rub' Al Khali

Cited by 57 publications

References 21 publications

Mapping the geochemistry of the northern Rub' Al Khali using multispectral remote sensing techniques

Mapping the geochemistry of the northern Rub' Al Khali using multispectral remote sensing techniques

A multi-proxy analysis of the Holocene humid phase from the United Arab Emirates and its implications for southeast Arabia's Neolithic populations

Valorization of Algerian Sand for Photovoltaic Application

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