Abstract
Hydrochemical and isotopic data are used to examine the decisive processes controlling groundwater chemistry and to reveal sources of groundwater. Groundwater from Axum area shows distinctive chemical and isotopic variation suggesting spatial diversity of the aquifer and different geochemical evolution. Individual compositions appear to be controlled by the type of host rock and intensity of water-rock interaction. Weathering of silicates and to lesser extent of calcite containing veins as well as ion-exchange explains most of the observed spatial variability in groundwater composition. The δ2HVSMOW and δ18OVSMOW values of the groundwaters indicate a meteoric origin. The δ13CVPDB values of dissolved inorganic carbon (DIC) range from −12 to +1‰ revealing magmatic CO2 and soil CO2 as predominant sources for DIC.
Originalsprache | englisch |
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Titel | Water-Rock Interaction |
Herausgeber (Verlag) | CRC Press |
Seiten | 47-50 |
Seitenumfang | 4 |
ISBN (elektronisch) | 9781439862995 |
ISBN (Print) | 9780415604260 |
Publikationsstatus | Veröffentlicht - 1 Jan. 2010 |
ASJC Scopus subject areas
- Allgemeine Umweltwissenschaft
- Allgemeine Erdkunde und Planetologie