SURVEI METODE SELF POTENTIAL MENGGUNAKAN ELEKTRODA POT BERPORI UNTUK MENDETEKSI ALIRAN FLUIDA PANAS BAWAH PERMUKAAN DI KAWASAN BATURADEN KABUPATEN BANYUMAS JAWA TENGAH

Abstract

Self Potential research has been done in the area of geothermal prospects
of Slamet Volcano, with locations is at around the hot water sources of Pancuran
Tujuh Baturaden, District of Banyumas, Central Java. Tools used in this study were
porous pot electrodes and digital milivoltmeter that have very high input impedance.
Dimension of research area are 24 x 24 square meters, with the number of
measurement points are 112 point. The electrode configuration used is the fixed
model that is by keeping one electrode fixed at the reference point, while the other
electrode moved at any interval in accordance with the direction of trajectory in the
research area. According to the results obtained is known that the highest potential
data obtained is -2.20 mV, the lowest data is -40.83 mV, and then the average data is
-16.40 mV. According to the contour map of iso-potential obtained is known that the
study area is a conductive zone, which probably contains of sulfide minerals in the
subsurface hot fluid. This is indicated by the low value of the measured self potential
(its value are negative). According to qualitative and quantitative interpretation, known
that the flow of subsurface hot fluid in following the change of research area
topography and self potential anomalies. The subsurface hot fluid in research area is
predicted flow from southern to northern.