Proceedings World Geothermal Congress 2010 Bali, Indonesia, 25-29 April 2010 Controlled Source Magnetotelluric Survey of Mabini Geothermal Prospect, Mabini, Batangas, Philippines Rogelio A. Del Rosario, Jr. and Alejandro F. Oanes Geothermal & Coal Resources Development Division, Energy Resource Development Bureau, Department of Energy, Energy Center, Merritt Road, Fort Bonifacio, Taguig City, MM, Philippines
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[email protected] Keywords: Controlled Source Magnetotelluric, Mabini, Compared with other geothermal prospects in the country, Batangas, MBGP MBGP is potentially important not only because of its geothermal signatures (such as impressive surface thermal ABSTRACT manifestation, relatively high subsurface temperature, etc.) but also for its proximity to the port of Batangas, a potential Controlled Source Magnetotelluric (CSMT) survey was user of geothermal power. Area surveyed is within the conducted over the Mabini Geothermal Prospect (MBGP) municipality of Mabini. The area is bounded by Bauan on by Geothermal Division staff in 2000. The purpose of the the north, Batangas Bay on the east, Maricaban Island on survey is to characterize the geothermal system underneath the south and Balayan Bay on the west. The area is the prospect and to test the reliability of the newly repaired accessible from Batangas City via the well-paved national CSMT equipment from Japan. CSMT is frequency domain highway that links the town of Lemery, Bauan and Mabini. electromagnetic sounding system that utilizes horizontal dipole as an artificial signal source located 4-6 kilometer W e E s a t s away from the receiver. t B d B r a o a l t o a t a o d Volcanic Center a i n a c r Results of the survey show probable existence of n a r L o L M i i n geothermal resource beneath the Hulo Caldera Collapse.