| Abstract |
Sati Vicente Geothermal Prospect is located at the Eastern part of El Salvador. Pleistocene and Holocene Andesite Basalt pyroclastics and lavas are widespread all area around. Emanations of gases and deposits of clay minerals are present on two hydrothermal manifestation Zones on the north slope of Chichontepec Volcano. Acid sulfate-chloride waters discharge through the manifestations and alkali sodium-bicarbonate waters have been identified in the lower parts of the area. A temperature of 250 'C measured in a well 1346 deep (SV-I) corresponds with the presence of epidote hydrothermal mineral and is consistent with gas geothermometry. Residual gravity anomaly indicates the North and South up throw blocks of a graben, WE direction, 8 Km wide and a maximum depth of about 800 m. A low density body is indicated by the residual gravity data underneath the Chichontepec Volcano and is inferred to be high porosity concealed products of Pleistocene volcanic events. Two outflows, to the North and the East of the hydrothermal manifestations, are indicated by the resistivity traversing data. 1 D Interpretation of the resistivity sounding data show that the vertical resistivity structure of this area consists of mostly 3 layers. Due to a masking effect of a thick low resistivity stratum, a deep hot reservoir intersected by the geothermal well SV-1 does not show any low resistivity signal. |