Abstract:
Research has been carried out to identify andesite rock layers using 2D geo-electrical method with
Schlumberger configuration in the Pengaron area, South Kalimantan. Measurements were made for five tracks
with a length of each track being 270 m. The purpose of this research is to model the cross section of 2D
resistivity values, determine the type of lithology, depth and thickness of andesite rocks in the study area. Based
on the results of data processing, three layers of rock types were obtained. The first layer is the top soil layer
with a resistivity value of 39–116 Ωm, the second layer is clay with a resistivity value of 143–298 Ωm and the
third layer is andesite rock with a resistivity value of 320–1,000 Ωm. The 2D interpretation results show that
andesite rocks have a resistivity value of 382–1,000 Ωm at a depth of 10-77 m and a thickness of 10–55 m.
Keywords: andesite rock, geoelectrical method, Schlumberger configuration, Pengaron area
