Conceptual Model of the Berlin Geothermal Field, El Salvador

Abstract

A correlation between geological, geovulcanological, geochemical, hydrological and geophysical studies, drilling results and well measurements are interpreted in this report.

The heat source of the Berlin geothermal system is associated with chamber magma, located under two concentric calderas. The outer caldera is open to the North. Two aquifers and their seal cap have been revealed. The first one is a 300" C reservoir, NaCl composition. The second one 200?C calls intermediate aquifer. Hydrothermal alteration agrees geothermometry and temperature measurements. Natural recharge is mainly through the calderas. An infiltration of 2.5 m3h exists into the system. The upflow is trough the borders of the inner caldera. The system is open to the NNW flowing along a local graben. The outj7ow probably has a hydraulic barrier to the Worth. It is a miring of the NaCl hot reservoir, intermediate aquifer and meteoric water: Discharge zone is not complete understanding.