Hydrogeochemical characterization and isotope investigations of a carbonate aquifer of the northern part of the United Arab Emirates

Murad, Ahmed; Garamoon, Hassan; Hussein, Saber; Al-Nuaimi, Hind S.

doi:10.1016/j.jseaes.2010.07.013

Cited by 21 publications

(7 citation statements)

References 16 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the coastal carbonate aquifer of the Daweijia area, NO 3 − concentrations are characterized by high values reaching 521 mg/L. The major ion geochemistry of groundwater in coastal carbonate aquifers has been used in conjunction with multiple environmental tracers (e.g., δ C) for defining the recharge patterns of karst aquifers (including recharge origin, amount and distribution) (Jones et al, 2000;Horst et al, 2008;Charideh and Rahman, 2007;Frot et al, 2007;Murad et al, 2011;Khaska et al, 2013), building hydrogeological conceptual models (Falcone et al, 2008;Frondini, 2008;Long et al, 2008;Cerar and Urbanc, 2013), assessing possible anthropogenic influences on groundwater Schiavo et al, 2006;El Yaoutia et al, 2009;Urresti-Estala et al, 2015) and estimating the residence time of younger groundwaters and flow rates (Katz, 2004;Horst et al, 2008;Ettayfi et al, 2012). In this study, we report the major chemical and δ H and CFC compositions of groundwater from the coastal aquifers in the Daweijia area of Dalian City, north-eastern China.…”

Section: Introductionmentioning

confidence: 99%

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Han

Cao

McCallum

et al. 2015

Science of The Total Environment

View full text Add to dashboard Cite

• Examine high nitrate contents in the coastal carbonate aquifer of northeast China • Estimate renewal rates and mean residence times of groundwater in coastal aquifers • Evaluate the relation between groundwater age distribution and nitrate transport • Propose potential pollution patterns of nitrate distribution in the coastal aquifer • Identify anthropogenic input mainly responsible for increasing groundwater salinity a b s t r a c t a r t i c l e i n f o H and CFCs methods were applied to provide a better understanding of the relationship between the distribution of groundwater mean residence time (MRT) and nitrate transport, and to identify sources of nitrate concentrations in the complex coastal aquifer systems. There is a relatively narrow range of isotopic composition (ranging from − 8.5 to − 7.0‰) in most groundwater. Generally higher tritium contents observed in the wet season relative to the dry season may result from rapid groundwater circulation in response to the rainfall through the preferential flow paths. In the well field, the relatively increased nitrate concentrations of groundwater, accompanied by the higher tritium contents in the wet season, indicate the nitrate pollution can be attributed to domestic wastes. The binary exponential and piston-flow mixing model (BEP) yielded feasible age distributions based on the conceptual model. The good inverse relationship between groundwater MRTs (92-467 years) and the NO 3 − concentrations in the shallow Quaternary aquifers indicates that elevated nitrate concentrations are attributable to more recent recharge for shallow groundwater. However, there is no significant relationship between the MRTs (8-411 years) and the NO 3 − concentrations existing in the carbonate aquifer system, due to the complex hydrogeological conditions, groundwater age distributions and the range of contaminant source areas. Nitrate in the groundwater system without denitrification effects could accumulate and be transported for tens of years, through the complex carbonate aquifer matrix and the successive inputs of nitrogen from various sources.

show abstract

Section: Introductionmentioning

confidence: 99%

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Han

Cao

McCallum

et al. 2015

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…By contrast, samples with clear evidence of dissolution and blocky cement precipitation yield negative δ 18 O values similar to the low‐latitude Pleistocene and Holocene freshwater diagenetic calcite found worldwide (Land & Epstein, 1970; Allan & Matthews, 1977; Budd & Land, 1990; Saller & Moore, 1991), and similar to the isotopic values of the UAE groundwater, which range from −0.6 to −3.9‰ (Murad, 2010; Murad et al ., 2011). This supports meteoric diagenesis being the prime factor to explain the variations in the δ 18 O values of the Ghayathi and Fuwayrit formations.…”

Section: Discussionmentioning

confidence: 99%

Lost in the wind: An integrated approach for the recognition of mixed clastic–carbonate continental aeolianites

et al. 2022

View full text Add to dashboard Cite

Aeolianites with a mixed clastic and carbonate detrital mineralogy are typical deposits of tropical coastal desert environments. These deposits are genetically related to transgressive–regressive cycles, with the shallow‐marine carbonate detrital component being deflated from the exposed seafloor during episodes of glacial sea‐level lowstands, transported and later accumulated onto more continental areas. A detailed investigation of the granulometric and petrographic properties of the Late Pleistocene to Holocene Ghayathi Formation in the United Arab Emirates provides a comprehensive numerical dataset that reveals the complex spatio‐temporal depositional and diagenetic evolution of a mixed siliciclastic–carbonate continental aeolianite. Fifty‐one thin sections and forty‐four rock samples of three sedimentary units (Madinat‐Zayed, Ghayathi and Fuwayrit formations) from the United Arab Emirates were analyzed for their grain‐size distribution, mineralogy and the bulk stable‐carbon and oxygen isotopic composition. Sorting, skewness and kurtosis of the grain‐size distributions provide evidence for a divergent aerodynamic behaviour between the carbonate and siliciclastic particles. The different grain‐size distributions between the inland and coastal sections of the Ghayathi Formation indicate that continental mixed clastic−carbonate aeolianites are affected by density‐driven selective transport and consequent traction sorting due to the nature of carbonate detritus. The transport decoupling of the different detrital components resulted in a ‘continental sorting’ effect, with the inland sections yielding layers characterized by a better sorted detritus than the coastal areas. All detritus originally composed of aragonite has been removed by dissolution during early meteoric diagenesis, with its shapes frequently preserved by micritic envelopes. The bulk stable‐isotope composition of the carbonate fraction reflects a decreasing degree of meteoric cementation from coastal to inland areas. The high complexity of the lateral and vertical distribution of the sedimentary, diagenetic and isotopic properties of continental mixed aeolianites, such as the Ghayathi Formation, highlights the problem of recognizing such deposits in the pre‐Quaternary sedimentary record.

show abstract

“…HCO3-is easily dissolve in water and usually originates from weathering of feldspars and ferro-magnesium minerals by carbonic acid (Monjerezi et al, 2012). As well, it comes from dissolution of carbonate rocks and water-rock interaction (Murad et al, 2011). The bicarbonates (HCO32-is the dominant anion and the contents vary from 213 to 320 mg/l with a mean of 268.42 mg/l.…”

Section: Major Cations and Anions:-mentioning

confidence: 99%

Hydrochemistry of Water Springs of the Travertine Aquifer of Guelma in North-East of Algeria.

Nouar¹,

Geroui²,

Toumi³

2016

IJAR

View full text Add to dashboard Cite

Hydrogeochemical characterization and isotope investigations of a carbonate aquifer of the northern part of the United Arab Emirates

Cited by 21 publications

References 16 publications

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Lost in the wind: An integrated approach for the recognition of mixed clastic–carbonate continental aeolianites

Hydrochemistry of Water Springs of the Travertine Aquifer of Guelma in North-East of Algeria.

Contact Info

Product

Resources

About