Hydrogeochemistry in the Merida, Yucatan, (Mexico) groundwater: An analysis of major and trace elements [Hidrogeoquimica en el acuifero calcareo de Merida, Yucatan: Elementos traza]
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abstract
An analysis of major and trace elements (Fe(total), B, F-, Sr%2b2, Ba%2b2, I-, Br-) in the groundwater of the Merida (Yucatan, Mexico) aquifer was carried out. Water-rock interaction was leaned on trace elements and permitted to define major hydrogeochemical processes. Dissolved species were postulated to belong to three different sources: atmospheric water, seawater; a third major source was seawater that has reacted with the aquifer matrix. Dissolved oxygen concentrations controls Fetotal in the studied groundwater. The tendency of most of the analysed elements appearance shows that the saline end corresponds to marine water different to the current marine water, therefore the mixture is not caused by a process of saline intrusion as it has generally been supposed in the Peninsula. But rather the salted water that is in the underground is the one possibly caught during the immersions that it has suffered the Peninsula. Ca%2b2 and Mg%2b2 solubility controls permitted an understanding of carbonate geochemistry and the mixing processes between fresh and saline water.
