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Yaouti*, F.E.; Mandour, A.E.; Khattach, D.; Benavente, J.; Kaufmann, O. |
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Salinization processes in the unconfined aquifer of Bou-Areg (NE Morocco): A geostatistical, geochemical, and tomographic study |
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Journal Article |
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2009 |
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Appl. Geochemistry |
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24 |
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1 |
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16-31 |
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CUT @ phaedon.kyriakidis @ Yaouti2009 |
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148 |
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Faye, S.; Maloszewski, P.; Stichler, W.; Trimborn, P.; Faye, S. C.; Gaye, C. |
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Title |
Groundwater salinization in the Saloum (Senegal) delta aquifer: minor elements and isotopic indicators |
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Journal Article |
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2005 |
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Science of The Total Environment |
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343 |
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1 |
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243-259 |
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Minor elements, Hydrochemistry, Sorption/desorption, Mixing model, Salinization |
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The hydrochemistry of minor elements bromide (Br), boron (B), strontium (Sr), environmental stable isotopes (18O and 2H) together with major-ion chemistry (chloride, sodium, calcium) has been used to constrain the source(s), relative age, and processes of salinization in the Continental Terminal (CT) aquifer in the Saloum (mid-west Senegal) region. Seventy-one groundwater wells which include 24 wells contaminated by saltwater and three sites along the hypersaline Saloum River were sampled to obtain additional information on the hydrochemical characteristics of the groundwater defined in previous studies. Use of Br against Cl confirms the Saloum River saline water intrusion up to a contribution of 7% into the aquifer. In addition to this recent intrusion, a relatively ancient intrusion of the Saloum River water which had reached at least as far as 20 km south from the source was evidenced. The high molar ratio values of Sr/Cl and Sr/Ca indicate an additional input of strontium presumably derived from carbonate precipitation/dissolution reactions and also via adsorption reactions. The variable B concentrations (7–650 μg/L) found in the groundwater samples were tested against the binary mixing model to evaluate the processes of salinization which are responsible for the investigated system. Sorption of B and depletion of Na occur as the Saloum river water intrudes the aquifer (salinization) in the northern part of the region, whereas B desorption and Na enrichment occur as the fresh groundwater flushing displaces the saline waters in the coastal strip (refreshening). In the central zone where ancient intrusion prevailed, the process of freshening of the saline groundwater is indicated by the changes in major-ion chemistry as well as B desorption and Na enrichment. In addition to these processes, stable isotopes reveal that mixing with recently infiltrating waters and evaporation contribute to the changes in isotopic signature. |
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0048-9697 |
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THL @ christoph.kuells @ Faye2005243 |
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173 |
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Ladouche, B.; Luc, A.; Nathalie, D. |
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Title |
Chemical and isotopic investigation of rainwater in Southern France (1996–2002): Potential use as input signal for karst functioning investigation |
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Journal Article |
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2009 |
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Journal of Hydrology |
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367 |
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1-2 |
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150-164 |
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Elsevier |
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0022-1694 |
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THL @ luqianxue.zhang @ Ladouche2009 |
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58 |
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Herut, B.; Starinsky, A.; Katz, A. |
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Title |
Strontium in rainwater from Israel: sources, isotopes and chemistry |
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1993 |
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Earth and Planetary Science Letters |
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120 |
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1-2 |
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77-84 |
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Eighteen ram samples from Israel have been analyzed for their chemical composmon and S7Sr/S6Sr ratios The Sr-Isotoplc rahos lie In the range 0 7078 and 0 7092, and the Sr concentrations vary from 1 × 10 -4 to 9 x 10 4 meq Sr/l.
Soluble salts in rainwater are inherited from three major natural sources, seaspray, Recent marine minerals and mineral dust eroded from rock outcrops and soft A mixing model is formulated to apply the chemical composmon of rain (CI and Sr 2+) and ~ts isotopic 87Sr/S6Sr ratio, for the identification and est~mahon of the Sr sources.
All the samples fall within the m~xing space predicted by the model for the three end members mentioned above The data indicate that the most important non-seaspray source contributing d~ssolved salts to the rams m Israel comprises a mixture of Senoman to Eocene chalk (and its weathering products) and Recent marine minerals, from local and imported sources.
Most of the samples (67%) contain 50% or more non-seaspray Sr 0 e, Sr dissolved from dust or Recent marine minerals), whereas 56% of the samples display 87Sr/86Sr ratios lower than 0 7090. The rest represent mixtures of seaspray and Recent marine minerals. |
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Elsevier |
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THL @ luqianxue.zhang @ herut1993strontium |
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95 |
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Karistineos, N.; Ioakim, C. |
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Palaeoenvironmental and palaeoclimatic evolution of the serres basin (N. Greece) during the miocene |
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1989 |
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Palaeogeography, Palaeoclimatology, Palaeoecology |
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70 |
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1-3 |
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275-285 |
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The palaeoenvironmental and palaeoclimatic evolution of the Serres basin from the end of mid-Miocene to the end of the Miocene is examined. Lignites were deposited over a thick sequence of conglomerates and sands. Fossils found in the lignites indicate a lacustrine environment with tropical-subtropical climatic conditions. The climate became progressively drier and only small lakes were reserved during the Messinian salinity crisis. Deposition of lake sediments finally ended with the world-wide Pliocene marine transgression. A correlation of the Serres basin with other lacustrine basins in the Aegean area is attempted. |
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Elsevier |
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0031-0182 |
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THL @ christoph.kuells @ Karistineos1989 |
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28 |
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