The self-potential method in the geothermal exploration of Greece

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:80271

Apostolopoulos, G V; Louis, J; Lagios, E ^[1]

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1. Univ. of Athens (Greece)

Self Potential (SP) anomalies are generated by flows of fluid, heat and ions in the Earth (Corwin, 1990). SP investigations were used to locate and delineate sources associated with such flows in three (3) areas of geothermal interest, Lesvos Island, Loutra Hypatis (Central Greece) and Nisyros Island. A combination of geophysical methods, with the SP being the controlling one, has been applied in these areas. The SP method suffers by a variety of noise. A procedure is been suggested to minimize it, by means of monitoring the electrode polarization effects and telluric activity. The interpretation on SP maps is preferred rather than of SP profiles. The Fitterman`s model (1984) was used for the SP interpretation and the results were satisfactory. The geothermal fluid circulation zones determined by the SP interpretation in combination with the data acquired by other geophysical methods, give an integrated presentation of a geothermal system. Since SP and VLF anomalies are generated by the same source, the corresponding results are tested between each other. The activity of geothermal zones affects the conductivity of the surrounding medium and that can be detected by d.c. resistivity and AMT methods. The geothermal zones can be related to various interfaces or tectonic features detected by the gravity method.

• OSTI ID: 80271
• Report Number(s): CONF-941015--
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
DATA ANALYSIS
EXPLORATION
GEOTHERMAL SYSTEMS
GREECE
SP LOGGING