PENGARUH ROTASI TERHADAP PEMODELAN 2D PADA DATA MAGNETOTELURIK UNTUK EKSPLORASI PANASBUMI DAERAH ???SK???

Geothermal exploration currently used Magnetotelluric method but Magnetotelluric data often distorted due to different directions from stretch of tool with the direction of strike on the field, so it should be rotated.This research was conducted at 40 measurement points were rotated by 2250 with TM mode and inversion modeling is used 1-D and 2-D inversion. The influence of rotation in data modeling affects the result of resistivity values in both of the 1-D and 2-D models, difference its because the rotation direction can affect the impedance values and then affect the resistivity value and then skindepth. But for rotated data based on the structure direction can be provide a clearer picture of the structure which is located close to the surface by overlaying the manifestation data of hot water and gravity data. The results show the interpretation of the Caprock is located in 1000 meters depth from surface in zone of resistivity values <10 ohm-m, the reservoir layer contained in resistivity zones 10-70 ohm-m at a depth 1000-2000 meters and resistivity zone of the heat source is > 200 ohm-m at depths > 2000 meters