Bulletin of the Geological Society of Malaysia, Volume 19, April 1986, pp. 587 – 595
1Department of Geological Sciences, Chiang Mai University, Thailand
2Special Energy Division, Energy Technology Department, Electricity Generating Authority of Thailand.
Abstract: The energy spectrum of the San Kampaeng total magnetic field is cut off at the frequency higher than 0.0015 cycle/metre for each magnetic profile to remove a near surface magnetic noise. These filtered magnetic data arc plotted as a contour magnetic map for magnetic interpretation. The contour map gives excellent results on which a geological interpretation can be based. The map shows magnetic bodies which are postulated to be a heat source of the San Kampaeng geothermal area. A major fault structure is also revealed by this magnetic contour map. This major fault is along the direction of magnetic bodies trending north-south. The results prove the existence of a fault, adjacent to the east of the massive limestone hills, which may have direct implication to the present position of the San Kampaeng Volcanics.