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All Journal Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT)
Eko Bayu Purwasatriya, Eko Bayu
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Physics Transportation

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Studi Potensi Sumberdaya Andesit Menggunakan Metode Geolistrik Di Daerah Kokap, Kabupaten Kulonprogo, Daerah Istimewa Yogyakarta Purwasatriya, Eko Bayu
Dinamika Rekayasa Vol 9, No 2 (2013): Dinamika Rekayasa - Agustus 2013
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2013.9.2.66

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.
Struktur Geologi Daerah Longsor di Gunung Pawinihan, Kabupaten Banjarnegara, Jawa Tengah Widagdo, Asmoro; Jati, Indra Permana; Waluyo, Gentur; Purwasatriya, Eko Bayu; Suwardi, Suwardi
Dinamika Rekayasa Vol 10, No 2 (2014): Dinamika Rekayasa - Agustus 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.2.81

Abstract

Fenomena longsor dapat terjadi dengan berbagai faktor pengontrol. Permasalahan yang di kaji dalam penelitian ini terutama adalah untuk mengetahui hubungan struktural antar lapisan batuan di daerah penelitian. Kondisi struktur dapat menjadi pemicu bagi fenomena longsor. Metode penelitian dilakukan dengan pengamatan dan pemetaan lapangan. Pengukuran struktur geologi berupa kedudukan lapisan batuan dan penentuan hubungan stratigrafis antar batuan dilakukan dilapangan. Pengukuran kelerengan topografi dilakukan di peta dan dilapangan. Daerah penelitian tersusun atas batu lempung dengan sisipan pasir karbonatan sebagai batuan yang tua dan juga tersusun atas breksi sebagai yang lebih muda. Batu lempung sebagai batuan yang mudah tererosi baik secara kimia maupun fisika. Erosi aktif pada batulempung memicu pergerakan masa breksi diatasnya. Hadirnya mata air pada kontak lempung-breksi juga memicu terjadinya longsor. Dengan demikian longsor di daerah penelitian dipicu oleh adanya kontak ketidakselarasan antara batuan breksi segar dan lapuk dengan batulempung di bawahnya.
Pembuatan Model Geologi Bawah Permukaan dengan Metode Geolistrik Dan Studi Stratigrafi pada Rembesan Gas DiJatilawang, Banyumas Purwasatriya, Eko Bayu; Waluyo, Gentur
Dinamika Rekayasa Vol 7, No 2 (2011): Dinamika Rekayasa - Agustus 2011
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2011.7.2.50

Abstract

Banyumas basin is oneof sedimentary basin inIndonesia whichhasn’t proven yet its economical hydrocarbonreserves, although there are several oil and gas seeps in this area which is indicate mature source rocks had been migrated. One of itsgas seep is located on Karanglewas village, Jatilawang, Banyumas which hadbeen flowing its gases since tens years ago. Geoelectrical method and Stratigraphic studyare the methods usedin this research to built a geological subsurface model of Jatilawang’s gas seep.Geoelectrical method isintent to finding the distribution of gas seep over the area and also to finding the direction of fault structure which can be act asa path for gases to flowing up. Stratigraphic study comprise of lithology description, strike and dip measurement, and study of other secondary geological data. Interpreted subsurfacegeological model showing that sandstone dominated bed of Halang Formation is filled by gases and become gas pockets near the surface. Fault direction also interpreted from correlation of these gas pockets and resulting directionof N 115° E and dip of fault plane is45°.Gas flowing through fault and probably the source comes from gas cap of Jatilawang’s anticline. Predicted location of gas cap is about 610 meters to the south, and depthabout 620 meters.
Studi Potensi Minyak Dangkal dengan Pendekatan Metode Statistik Berdasar Data Geologi Permukaan Di Cekungan Banyumas Purwasatriya, Eko Bayu; Waluyo, Gentur
Dinamika Rekayasa Vol 8, No 2 (2012): Dinamika Rekayasa - Agustus 2012
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2012.8.2.103

Abstract

Banyumas basin is part of South Java Fore Arc Basin. Tectonically, Banyumas basin also included in South Central Java Region, where the main structure are trending Northwest – Southeast and Northeast – Southwest. Stratigraphically, the formation sequence from the oldest to the youngest are : Gabon Formation, Pemali Formation, Kalipucang Formation, Rambatan Formation, Halang Formation, Tapak Formation and Alluvium & Volcanic deposits. Banyumas basin and surrounding area have several oil and gas seep. This seep indicating there are mature source rock that had been migrate to the surface. The factor required for existing of hydrocarbon is called petroleum systems, and the factor are : mature source rock, reservoir rock, cap rock/seal rock, trap and proper timing of migration. The study of shallow oil potential is a preliminary step to find the suitable exploration concept for Banyumas basin. This step is used after the discovery of shallow oil accidentally in about 90 meters depth in Tipar Village, Ajibarang sub-district. This study using the surface geological data and secondary data available and also scientific paper, related to Banyumas basin. Statistical method approaching is using the assumption of minimum probability (P10) to estimate the reserves potential of shallow oil that probably exist in Banyumas basin, and the result is the reserves potential about 2,181,937 barrels oil.
SESAR NAIK KALI JEBUG SEBAGAI INDIKASI PENGONTROL NAIKNYA BATUAN PRATERSIER DI KARANGSAMBUNG, KABUPATEN KEBUMEN-JAWA TENGAH Widagdo, Asmoro; Setijadi, Racmad; Purwasatriya, Eko Bayu; Suman, Huzaeli Latief; Aditama, Maulana Rizki; Laksono, FX Anjar Tri
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 2, No 1 (2020)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.103 KB)

Abstract

Kemunculan komplek batuan melang berumur pra-tersier di daerah Karangsambung, Jawa Tengah merupakan hal yang masih menjadi perdebatan dan telah melahirkan berbagai pendapat yang menjelaskannya. Struktur lipatanantiklin, sesar naik dan sesar mendatar yang dijumpai di sekitar daerah ini dapat menjadi penyebab kemunculan batuan tertua di Pulau Jawa ini. Penelitian ini dilakukan guna menjelaskan kontrol struktur geologi tertentu yang menyebabkan kemunculan batuan berumur Pra-Tersied di sekitar batuan berumur Tersier di Karangsambung. Penelitian ini dilakukan dengan melakukan kajian struktur geologi pada batas selatan batuan Pra-Tersier. Pemetaansebaran batuan Pra-Tersier dan Tersier serta pengukuran unsur struktur sesar dilakukan pada batas ini. Analisis dilakukan dengan membuat penampang geologi, analisis stereografis data sesar dan lipatan. Sesar Naik Kali Jebugdengan kedudukan N250E/40N pitch 70 ke arah NE telah mengontrol kemunculan batuan Pra-Tersier di Karangsambung. Sesar naik miring ke utara ini menjadi batas batuan Pra-Tersier dan Batuan Formasi Karangsambung yang berumur Eosen di selatan. Sesar ini dihasilkan oleh gaya utama berarah Utara-Selatan yang bekerja pada batuan dasar dan mengasilkan antiklin dan sinklin di daerah Karangsambung.
Early to Middle Miocene Dissectec Arc of Karangsambung Area: A Case Study of Waturanda and Penosogan Formations Provenance Safira, Faradhea; Purwasatriya, Eko Bayu; Gibran, Akhmad Khahlil
Journal of Earth and Marine Technology (JEMT) Vol 3, No 2 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v3i2.4535

Abstract

This study undertakes a comprehensive analysis of the geological conditions within a specific region, with a dual objective. Firstly, it aims to detail the geophysical attributes, structural aspects, and formation processes of the region. Secondly, it strives to establish a connection between the provenance, or origin, of the sedimentary materials in the region and its geological characteristics. The primary subjects of the research are the Waturanda and Penosogan Formations. These formations were selected due to their unique geological properties that offer insights into the geological history of the region. The primary method employed in the study was petrographic analysis. This technique, involving a microscopic examination of rocks, facilitated a detailed investigation into the rock samples from both formations, highlighting their mineralogical constitution and overall textures. The study also involved a thorough examination of the original rock or parent material of the Waturanda and Penosogan Formations. This analysis provided important information about their inherent geological attributes and formation processes. One of the key findings was the identification of the tectonic environment in which these formations were developed. The study revealed that the tectonic setting was a magmatic arc, specifically a dissected arc. This significant insight into the geological conditions has profound implications for understanding the geological evolution and history of the region, thereby enriching our knowledge of Earth's dynamic geological processes.
Co-Authors Aditama, Maulana Rizki Asmoro Widagdo, Asmoro Gentur Waluyo, Gentur Gibran, Akhmad Khahlil Indra Permana Jati, Indra Permana Laksono, FX Anjar Tri Nasution, Annio Indah Lestari Safira, Faradhea Setijadi, Racmad Suman, Huzaeli Latief