Hidayatika, Akroma and Suharno, Suharno and Hesti, Hesti CONDUCTIVITY ZONE ON AUDIO-MAGNETOTELLURIC DATA (AMT) IN PARANGTRITIS AREA, BANTUL, YOGYAKARTA. In: Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri (SINTA 2019), 25 September 2019, Emersia Hotel Lampung. (In Press)

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Abstract

Parangtritis area has a high attraction for tourists and researchers. This area has high cliffs with steep slopes, large rivers, sand dunes, warm springs to adjacent beaches. Morphologycaly, existence of highly dissected structural mountains to the beach with sand dunes. From geological point of area Parangtritis is contact of Nglanggran Formation, Wonosari Formation, Merapi Volcano and Alluvial Sediment. This study uses the MT geophysical method. The MT electromagnetic geophysical method is capable of measuring rock resistivity and has a high efficiency, one of which is the Audio-Magneto Telluric or AMT method (Berktold, 1983). This method is able to describe subsurface lithology using a resistivity model that has penetration more than 1 km. The result generally consists of five layers; the first layer is a 37 Ohm-m thin resistive layer with a thickness of about 7 m associated with breccias; the second layer is a 9 Ohm-m conductive layer about 100 m thick possibly related to andesite lava that is altered and contaminated with sea water; the third layer is still a conductive layer but with a relatively higher type of resistivity (18 Ohm-m) with a thickness of about 180 m which is probably related to andesite lava changed; the fourth layer is a 9 Ohm-m conductive layer around 700 m thick which is probably still related to the changed andesite lava rock but it is uncertain whether or not it has been contaminated with sea water. Then, conductive zone is located in North-East of the research location.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	Q Science > QE Geology
Divisions:	Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User:	M.Eng Akroma Hidayatika
Date Deposited:	14 Nov 2019 10:53
Last Modified:	14 Nov 2019 10:53
URI:	http://repository.lppm.unila.ac.id/id/eprint/15489

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