Abstract

The study area is located inside the Valles-San Luis Potosi platform, which belongs to the Sierra Madre Oriental (SMO), whose mountain portion, formed by anticlines and synclines, has a North-South preferential orientation and a very important system of faults and fractures with East-West orientation that control the groundwater flow into the Gulf of Mexico. In order to demonstrate the hydraulic connectivity of the East-West system of faults and fractures, inverse modeling was applied to four sections. Other performed tests in possible connections between fractures were not able to reproduce these processes, which are interpretated as non-hydraulic connection points. Two main types of water were identified: one with calcium bicarbonate because of the interaction with carbonate rocks such as limestone, and other with calcium sulfate that is related with a process of water-rock interaction, mainly from evaporite

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