2024/12/12 by Mohammed Elgettafi, Samia Rochdane, Abdenabi Elmandour +3 · 1 voice
Earth and Planetary Sciences · #Geological and Geophysical Studies Worldwide #Groundwater and Isotope Geochemistry #Karst Systems and Hydrogeology
paper · doi:10.1016/j.ejrh.2024.102123
openalex publication_date 2024/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Study region Paleozoic, Triassic and Quaternary lateral aquifers have been the subject of detailed geochemistry study, in Oriental Haouz, Morocco. Study method Interpretations are based on the combination of major elements, Br, Li, and stable isotopes. In order to identify the origin of salinization , hydrochemical analysis were applied on forty groundwater samples, twenty of them are used for stable isotope measurement, three rivers, a sample from the natural spring in the south-western part and one rain water. New hydrochemical insights High values of Li are considered with regard to micaschists and evaporite formations. This is roughly consistent with Lithium’s origin from saline dissolution. Cl/Br ratios show that the initial sedimentary rocks which give the present micaschists were relatively rich in evaporitic minerals and the beginning with of metamorphism during the hercynian orogeny , the major elements originally present in low-grade phases, would preserved in medium-grade phases such as evaporite minerals. Consequently, these minerals were easily liberated via alteration of alterated Paleozoic micaschist strata. NO 3 2- does not only come from agricultural pollution but also from septic waste. Stable isotopes are segregated into two groups: Group1 coexists with high hydraulic parameters and is depleted of δ 18 O and δ 2 H; Group2 coexists with low hydraulic parameters, and is enriched with δ 18 O and δ 2 H. Thus, during precipitation events, waters infiltrate safely/sparingly, and evaporation did not/or occur following hydraulic parameters.