- A - Physics of the Earth's Interior
- B - Seismology
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C - Geomagnetism
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- D - Physics of the Atmosphere
- E - Hydrology
- P - Polar Research
- M - Miscellanea
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Online First
Magnetotellurics Data Application in Medium Enthalpy Geothermal Prospects
DOI: 10.25171/InstGeoph_PAS_Publs-2020-003
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Abstract:
The research is aimed at delineating the reservoir and defining the geothermal system of Lili-Sepporaki through the interpretation of magnetotellurics data. Lili-Sepporaki is an ande-sitic-trachytic volcanic rich geothermal prospect located in western Sulawesi Province, Indonesia. In essence, hydrothermal conditions affect the properties of rocks, such as resistivity, and this can be studied using magnetotellurics, a passive electromagnetic technique. Magnetotellurics data were processed and interpreted using Phoenix and WinGLink software programs. A total of five two-dimensional resistivity models and five elevation maps were produced, and these showed a general decrease in rocks’ resistivity with depth. The analysis found out that the reservoir stretches from the center, northwards. The reservoir substantially starts to be seen at a depth of 600 m below sea level and deepens towards the east and north-west. Another magnetotelluric survey should be carried out with more stations, mainly aimed at a three-dimensional inversion, to get a detailed geothermal model and also to study the dense, low resistive structure in the southeast.