Electrical Resistivity Surveys, Ascension Island, South Atlantic Ocean

Jump to: navigation, search


OpenEI Reference LibraryAdd to library

Journal Article: Electrical Resistivity Surveys, Ascension Island, South Atlantic Ocean

Abstract
Reconnaissance electrical resistivity surveys, completed on Ascension Island as one part of an integrated geothermal exploration program, define a 5 km2 area of low resistivity within the central part of the island. Dipole-dipole lines help to define the vertical resistivity structure and suggest the incursion of seawater beneath much of the area surveyed. A zone of 5-10 Ωm indicated by numerical modeling suggests possible alteration and geothermal brines that may have mixed with seawater, above a geothermal reservoir. Temperature gradients in shallow drillholes and a deep exploration well indicate the presence of a deep geothermal system in this area.

Authors 
Howard P. Ross, Dale J. Green and Claron E. Mackelprang








Published Journal 
Geothermics, Date Not Provided





DOI 
10.1016/0375-6505(96)00012-0


 

Citation

Howard P. Ross,Dale J. Green,Claron E. Mackelprang. . Electrical Resistivity Surveys, Ascension Island, South Atlantic Ocean. Geothermics. (!) .