Studi Potensi Sumberdaya Andesit Menggunakan Metode Geolistrik Di Daerah Kokap, Kabupaten Kulonprogo, Daerah Istimewa Yogyakarta
Abstract: The study of
andesite resources was carried out in Hargowilis village, Kokap sub-district,
Kulonprogo regency, Daerah Istimewa Yogyakarta province using geoelectrical
data with Schlumberger configuration, as much as 14 point which is spreading on
8 hectares area. Based on regional geological map of Yogyakarta area, study
area include on intrusive rock lithology’s unit compose of hipersten andesite
to augite-hornblende andesite and trachiandesite. Geoelectrical method is one
of geophysical method that used to observed geological condition in subsurface
based on rock’s electrical properties. Andesite is one type of igneous rock
which have contrast electrical properties with its surrounding rock, generally
sedimentary rocks, makes it suitable for geoelectrical method to identify the
presence of andesite in subsurface and also estimate its thickness to calculate
the resources. Geoelectrical configuration used is 1D Schlumberger
configuration where this method have advantage more accurate to calculate the
thickness of rock layer especially in shallow area. The result of geoelectrical
survey showing that it consist 2 layer of andesite, there are shallow layer and
deep layer. This result indicate that the igneous rock in study area not only
intrusion type, but also lava flow type. Resources potential of andesite both
shallow and deep layer are 5,072,354 tons and resources potential of shallow
andesite only is 3,162,566 tons.
Penulis: Eko Bayu Purwasatriya
Kode Jurnal: jptindustridd130557
