INTERPRETASI LAPISAN BATUAN BAWAH PERMUKAAN DI SEKITAR MANIFESTASI PANAS BUMI PARANGWEDANG KABUPATEN BANTUL YOGYAKARTA BERDASARKAN PENGUKURAN GEOLISTRIK DENGAN METODE RESISTIVITAS

EKA PURWITA SARI, NIM. 11620015 (2015) INTERPRETASI LAPISAN BATUAN BAWAH PERMUKAAN DI SEKITAR MANIFESTASI PANAS BUMI PARANGWEDANG KABUPATEN BANTUL YOGYAKARTA BERDASARKAN PENGUKURAN GEOLISTRIK DENGAN METODE RESISTIVITAS. Skripsi thesis, UIN SUNAN KALIJAGA YOGYAKARTA.

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Abstract

Geoelectric measurements have been carried out around the geothermal manifestations Parangwedang, Yogyakarta, which aims to determine the structure of the subsurface and the depth of the aquifer based on the value of resistivity (ρ) and temperature wells. Data collection was performed by using Syscal on a 4 point measurement with Schlumberger and 2 line configuration with a dipoledipole configuration. Measurement data were analyzed by two-dimensional modeling software RES2DINV to obtain resistivity values. Based on the results of the study, after the data is processed using software and software RES2DINV Progress obtained rock layers namely: At the top of the ground up at a depth of 0 to 1.71 m is topsoil (overburden) with a value of ρ (785 Ωm) is a sandy dunes. From the depths of 1,71- 5,13 m with a value of ρ (381- 785 Ωm) is a layer of sandy clay. From the depths of 5.13 to 8.72 m with a value of ρ (43,7- 186 Ωm) interpreted as sandstone and interpreted as a layer that can serve to store and drain the water, the aquifer could be called just that this aquifer is shallow to hold water surface. From a depth of 12.7 m with a value 5,72- ρ (5,02- 21.3 Ωm) is an aquifer system that contains a lot of water. Shallow aquifer located at a depth of 5.27 to 12.8 meters. Smur temperature data about the geothermal manifestations classified as moderate temperature.

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