Recognition of Diagenetic Dolomite and Chemical Surface Features of the Quartz Grains in Coastal Sabkha Sediments of the Hypersaline Shuaiba Lagoon, Eastern Red Sea Coast, Saudi Arabia

Al-Washmi, Hamad A.; Gheith, A.

doi:10.4197/mar.14-1.8

Cited by 6 publications

(6 citation statements)

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“…The mineralogical composition of the SHL and MJL bottom sediments supplemented with data from previous work [16] show that the mineralogical composition consists mainly of carbonate minerals, particularly high Mg-calcite (HMC), aragonite, low Mg-calcite and traces of dolomite.…”

Section: Mineralogical Compositionmentioning

confidence: 77%

“…Earlier studies [6,16] suggested that the bottom of the SHL experiences stagnation and anoxic conditions particularly in areas that are enriched in organic matter. They attributed the stagnant conditions to the limited water exchange with the Red Sea and the hypersalinity because of arid climate.…”

Section: Lagoonal Bottom Conditionsmentioning

confidence: 99%

“…Pyrite if present in the bottom sediments of Al-Shuaiba Lagoon has been attributed to the presence of dysoxic to anoxic bottom conditions [16]. However, pyrite can be formed under both anoxic and oxic conditions.…”

Section: Lagoonal Bottom Conditionsmentioning

confidence: 99%

“…The two lagoons show variable morphologies and connection with the Red Sea producing different hydraulic circulation within the two lagoons and consequently different physical and biogeochemical processes, dispersal patterns and composition of bottom sediments. The lagoons were previously studied for their sedimentological and micropaleontological attributes [15][16][17][18][19]. The geochemistry of the environmentally sensitive elements in the bottom sediments of the two lagoons were involved to establish a geochemical background for the Red Sea coastal lagoons [11].…”

Section: Introductionmentioning

confidence: 99%

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Controlling factors on the geochemistry of Al-Shuaiba and Al-Mejarma coastal lagoons, Red Sea, Saudi Arabia

Basaham¹,

Ghandour²,

Haredy³

2019

Open Geosciences

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Geochemical and mineralogical analyses of bottom sediments collected from Al-Shuaiba (SHL) and Al-Mejarma (MJL) coastal lagoons, Red Sea were carried out. Mineralogically, the sediments consist mainly of carbonate minerals particularly aragonite, high and low Mg-calcite and traces of dolomite admixed with non-carbonate minerals including quartz, k-feldspars, plagioclase and traces of amphiboles, mica and clay minerals. The spatial distribution of major and trace elements at the bottom of the lagoons indicates two groups of elements. The first, less significant, is of terrigenous origin concentrates mainly in the shoreward direction. This group includes the silicates (Al2O3-Fe2O3-SiO2), Feldspars (K2O-Rb-Ba) and heavy minerals (V-Cr-Zr, TiO2-Y-Nb) related elements. The second most dominant group is the carbonate related elements (CaO-Sr) that concentrates in the seaward direction. The two lagoons are not affected by urbanization or anthropogenic impact, and hence the siliciclastic elements are related to the terrigenous influx mainly by aeolian transportation. The carbonate related elements are mainly of biogenic origin related to calcareous skeletal remains. The elemental distribution in the bottom sediments of the MJL is more homogeneous than those in the SHL reflecting the bottom conditions that are mainly controlled by lagoon morphology, hydrodynamic and the water circulation between the lagoon and the sea. Geochemical data show no obvious enrichment of Al-normalized redox-sensitive trace elements V and Cr suggesting that there is no variation in the bottom redox conditions in contrast with other previous studies. The information in this work is an important tool for biogeochemical and biological research projects in the Red Sea coastal lagoons.

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Section: Mineralogical Compositionmentioning

confidence: 77%

Section: Lagoonal Bottom Conditionsmentioning

confidence: 99%

Section: Lagoonal Bottom Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Controlling factors on the geochemistry of Al-Shuaiba and Al-Mejarma coastal lagoons, Red Sea, Saudi Arabia

Basaham¹,

Ghandour²,

Haredy³

2019

Open Geosciences

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“…Many studies (e.g., Ahmed and Sultan, 1992;Al-Washmi and Gheith, 2003;Hariri, 2008;and Al-Barakati, 2010) have dealt with the Shuaiba Lagoon in regard to its meteorology and water circulation, diagenesis of sediments and microfossils, but no attention has been paid to its environmental characteristics. Ahmed and Sultan (1992) reported that the exchange of water between Shuaiba Lagoon and the Red Sea was mainly forced by the local winds, whereas seasonal mean sea level variations did not have a significant effect on the flushing of this lagoon.…”

Section: Introductionmentioning

confidence: 99%

Present Environmental Status of the Shuaiba Lagoon, Red Sea Coast, Saudi Arabia

Abu-Zied¹,

Bantan²,

Mamoney³

2011

mar

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Shuaiba Lagoon is located about 80 km south of Jeddah city, Saudi Arabia. Its environmental characteristics were determined. The macro-fauna and flora were also sampled and identified. Extreme values for salinity (60‰) and water temperature (33°C) were recorded and that may be due to its shallowness and small volume and occurrence under arid warm climate. Lagoon water pH was low (8.3), likely, as a result of re-mineralization of organic matters. These extreme variables exerted probably a stressful natural environment on the calcareous macro-fauna (molluscs and corals) as indicated by dominance of gastropod Cerithidea pliculosa and pelecypod Mytilus edulis in the lagoon. Corals could not tolerate these conditions so they were only recorded close to the inner-and outside inlet of the lagoon. On the contrary, these environmental conditions are probably favorable for mangroves, seagrasses and macro-algae (and Cyanophytes) as indicated by their proliferation in the lagoon.

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Lagoon Sediments of the Eastern Red Sea: Distribution Processes, Pathways and Patterns

Rasul

2015

Springer Earth System Sciences

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Recognition of Diagenetic Dolomite and Chemical Surface Features of the Quartz Grains in Coastal Sabkha Sediments of the Hypersaline Shuaiba Lagoon, Eastern Red Sea Coast, Saudi Arabia

Cited by 6 publications

References 0 publications

Controlling factors on the geochemistry of Al-Shuaiba and Al-Mejarma coastal lagoons, Red Sea, Saudi Arabia

Controlling factors on the geochemistry of Al-Shuaiba and Al-Mejarma coastal lagoons, Red Sea, Saudi Arabia

Present Environmental Status of the Shuaiba Lagoon, Red Sea Coast, Saudi Arabia

Lagoon Sediments of the Eastern Red Sea: Distribution Processes, Pathways and Patterns

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