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All Journal Jurnal IPTEK PROMINE Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal GEOSAPTA Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Widiatmoko, Fajar Rizki
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Geological Mapping of the Longkeyang and Surrounding Regions, Bodeh District, Pemalang Regency, Central Java Firmansyah, Irwan; Candra, Adi; Widiatmoko, Fajar Rizki
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
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.2021.v2i1.2166

Abstract

Geological mapping is one of the important things as part of a field study to obtain geological knowledge. This is due to the need for a geologist who is required to be able to understand the geological conditions of an area, one of which is by conducting mapping activities in the field. In conducting this research activity, it is divided into two stages, namely the field stage and the laboratory stage. The purpose of this research is to determine the characteristics and geological conditions, identify resource potentials and potential geological disasters in the research area. Based on the analysis, it was found that the geomorphological units of the study area were divided into 4 (four), namely the Mount Ketos Homocline Hills Unit, the Polaga River Anticline Valley Unit, the Sarangkadu Cycline Hills Unit, and the Mount Lanji Intrusion Hills Unit. The geology of the study area consists of three rock units in order from oldest to youngest, namely the claystone-sandstone unit and the sandstone-claystone unit and the diorite intrusion unit. The geological structure of the pinnacle area is in the form of folds and faults, namely, Polaga River Anticlines, Sarangkadu Synclines, Polaga River Right Shear Fault, Polaga River Left Shear Fault. The geological history of the study area begins with the deposition of claystone-sandstone units during the Middle Miocene in the Upper Bathyal environment. Furthermore, after the claystone-sandstone units were deposited, during the Middle Miocene – Late Miocene in the Deep Neuritic environment, sandstone-claystone units were deposited with a turbidity deposition mechanism. As well as the geological resource potential of the research area in the form of utilization of river deposits in the form of chunks of igneous rock, river sand deposits and indications of the presence of gold. Meanwhile, the potential for geological disasters in the form of landslides.
Geological Mapping of Gunungbatu and Surrounding Areas, Bodeh District, Pemalang Regency, Central Java Widiatmoko, Fajar Rizki; Aziz, Mochammad; Firmansyah, Irwan
Journal of Earth and Marine Technology (JEMT) Vol 2, No 1 (2021)
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.2021.v2i1.2167

Abstract

Mapping is the activity of collecting data from an area to be mapped, in the context of geology mapping means collecting data that includes descriptions of rocks, rock structures, rock positions, structure measurements (plunge/trend, pitch, microfold), rock thickness measurements, rock sampling and sketches. landscape, covering an area to be mapped. Research in the area of Gunungbatu and its surroundings, Bodeh District, Pemalang Regency, Central Java Province with the aim of knowing and knowing that it is in the research area by reconstructing the history of formation or geomorphological history, merely tectonic history in space and time, reconstructing geological history based on micropaleontological analysis. Based on the analysis carried out, it was found that the geomorphological units of the study area were divided into 5, namely the Gunungbatu Syncline Hills Unit, the Kali Bodas Anticline Valley Unit, the Girimulya Syncline Hills Unit, the Cenggiri Homocline Hills Unit and the Kebubung Homocline Valley Unit. The geology of the study area consists of two unofficial rock units in order from oldest to youngest, namely the claystone-sandstone unit and the sandstone-claystone unit. The geological structures of the pinpoint folds and faults are Mount Ketos Syncline, Kali Bodas Anticline, Gapura Syncline, Pertapan Igir Syncline, Cenggiri River Rising Fault, Kebubung Dextral Fault, and Girimulya Dextral Fault. The geological history of the research area begins with the book Unit of Claystone in the Middle Miocene Environment in Upper Bathyal. Furthermore, after the claystone-sandstone units were deposited, during the Middle Miocene – Late Miocene in the Deep Neritic Environment, the sandstone-claystone units were deposited with a turbidite mechanism. As well as the geological resource potential of the research area in the form of river utilization in the form of chunks of igneous rock, river sand deposits and gold seepage. Meanwhile, the potential for geological disasters in the form of landslides.
Petrografi dan Estimasi Sumberdaya Andesit pada WIUP Eksplorasi Daerah Rajekwesi, Kec. Kendit, Kab. Situbondo, Jawa Timur Widiatmoko, Fajar Rizki; Fanani, Yazid; Irwanto, Muhammad Agus; Suryawan, I Wayan Koko; Sari, Mega Mutiara; Putri, Ratih Hardini Kusuma
Geosapta Vol 8, No 2 (2022): JULI 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jg.v8i2.13438

Abstract

Kabupaten Situbondo memiliki banyak potensi sumber daya batuan, salah satunya adalah sumber daya berupa batuan andesit. Keterdapatan batuan andesit berasal dari produk gunungapi berjenis batuan beku yang terbentuk oleh aktivitas vulkanik intermediet dengan tipe magma andesitic. Penelitian ini dilakukan di wilayah IUP Eksplorasi Daerah Rajekwesi, Kecamatan Kendit, Kabupaten Situbondo untuk mengetahui kondisi geologi, petrografi batuan, dan volume sumberdaya dari batuan andesit yang terdapat dalam WIUP Eksplorasi. Berdasarkan hasil pemetaan geologi dan analisis petrografi menunjukkan bahwa Satuan Lava Kendit di daerah WIUP hadir seluas 100%, merupakan produk lava dari Gunungapi Ringgit, berisi batuan beku andesit dan sedikit tanah sebagai produk ubahan pelapukan dari batuan tersebut. Lebih detail lagi ditunjukkan dari hasil sampel batuan yang dianalisis menggunakan analisis petrografi terdapat kehadiran mineral plagioklas, kuarsa, feldspar dengan total komposisi 60% yang menunjukkan bahwa sampel tersebut berjenis batu andesit. Estimasi volume sumberdaya mengacu pada tiga jenis sumberdaya yaitu tereka, terunjuk, dan terukur. Berdasarkan hasil perhitungan sumberdaya didapatkan volume sumberdaya batu andesit tereka sebesar 267.555.503 Ton, terunjuk sebesar 23.129.687 Ton, dan sumberdaya terukur sebesar 1.227.962 Ton
Cumulative Environmental Impact of Humans’ (Agro-Busines) Activities Warner, Jeffrey; Widiatmoko, Fajar Rizki; Wang, Tsai-Ping
Journal of Earth and Marine Technology (JEMT) Vol 2, No 2 (2022)
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.2022.v2i2.2863

Abstract

This study analyzed the wastewater discharge of a four-region area comprised of agro-businesses (i.e. vegetable as well as commercial animal farms) and an adjacent urban area. Each region is respectively using a five-kilometer-long human-made irrigation system that collectively concludes at (and is injecting wastewater into) a major river leading to the Pacific Ocean. Using research methodology involving scientific measurements taken at strategic points located throughout this irrigation system, we deductively isolated which region in this overall area is the most significant respective contributor to the amassed wastewater. We hypothesized that the agro-business area involving commercial animal farming would be the most significant contributor. While we discovered that this is partly correct, the urban area is discharging the most concentrated levels of waste, including raw sewage.We do suspect that Taiwan’s environmental pollution regulations are beingviolated.However, further analysis involving wastewater volume, soil analysis, agro-business, and urban social construction identification, as well as the identifying of relevant environmental protection laws is still needed. This would best capacitate activism efforts toward lobbying government ornon-government organizations for potential environmental violations related to the intervention.
Penyusunan Zonasi Kawasan Pertambangan Di Kabupaten Magetan Berdasarkan Aplikasi Sistem Informasi Geografis Dengan Metode Pertampalan Fanani, Yazid; Widiatmoko, Fajar Rizki; Al Fakih, Salahudin; Suryawan, I Wayan Koko; Sari, Mega Mutiara
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Program Studi Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2774

Abstract

Magetan has resources mineral potential of non-metallic minerals and rocks. The mineral variety is a mineral which relates to the people livelihood because it necessary for infrastructure development. There is no mining area zoning until now and it can be used to optimize the management and utilization of potential resources. In Magetan, mining area zoning was carried out by giving weights and assessments to the determining parameters which was conducted by patch method and it utilized Geographic Information System. So, the result of mining area zoning could be grouped into three zones. They were a zone could be granted a mining permit, a zone could be granted a conditional mining permit and a zone could not be granted a mining permit. Determining parameters for mining area zoning were land height, disaster vulnerability, groundwater, river borders, lakes and irrigation buildings, springs, forests and protected areas, agricultural land and cultivation areas, settlements, cultural heritage, tourism and district strategic areas, and land slope. The result of potential resources identification was carried out by analyzing Magetan geological map which was obtained potential resources, like andesite, pumice breccia, sandstone, siltstone and basalt. The zoning of Magetan mining area is a zone could bne granted a mining permit and the area was 9,914.507 Ha or about 14% in a percentage of the area, a zone could be granted a conditional mining permit covering an area of 20,748.29 Ha or about 30% and a zone unable to be granted a mining permit covering an area of 39,296.08 Ha or about 56% of the total area of Magetan.
Interpretasi Struktur Geologi Berdasarkan Fault Fracture Density (FFD) dan Implikasinya Terhadap Potensi Likuefaksi di Daerah Kalibening, Kabupaten Banjarnegara, Jawa Tengah Sunan, Huzaely Latief; Gibran, Akhmad Khahlil; Aditama, Maulana Rizki; Iswahyudi, Sachrul; Widiatmoko, Fajar Rizki; Widagdo, Asmoro; Laksono, FX Anjar Tri
EKSPLORIUM Vol. 42 No. 1 (2021): MEI 2021
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2021.42.1.6129

Abstract

The existence of geological structures is often associated with landslides and earthquakes. The Kalibening area is an interesting location for research on that purpose. This area is composed of Pleistocene and Recent rocks units. Based on its stratigraphy, the rocks in the area are truncated by fault structure. It means that the fault in the area is categorized as an active fault. The high morphology and a basin existence on its center indicate that the area formation was controlled by faults. The research is carried out to determine the trend of the geological structures that control the study area. To determine the trend of the geological structure, a structural mapping method of Fault Fracture Density (FFD) map combined with the Bouguer anomaly residual map and hillshade lineaments map is used. In general, the most important thing in the study of structural geology is the geometry of the structural elements. The conceptual model of geological structures is subsequently used to analyze the liquefaction potential of the study area. The interpretation of the structures shows the existence of dextral strike-slip fault followed by companion faults and pull-apart basin that is inferred as the result of normal faulting in the strike-slip mechanism. The dextral strike-slip fault produces a basin filled with loose sediment that is prone to liquefaction in the event of an earthquake and ground motion. This study concludes that the Kalibening area is prone to liquefaction due to the existence of the movement of dextral strike-slip fault, loose sediments that dominate the study area, and shallow groundwater table.
Co-Authors Adi Candra, Adi Aditama, Maulana Rizki Akhmad Zamroni Al Fakih, Salahudin Asmoro Widagdo, Asmoro Atawolo, Yuliano Eldianto Avellyn Shinthya Sari Budiarto Budiarto Chornelis, willy Marta Dedi Kusnadi Fadlin Fadlin Fanani, Yazid Firmansyah, Irwan Gibran, Akhmad Khahlil Hadi, Abu Anas Hadi, Mochammad Nur Haryanto, Suis Edi Hidayatulloh, Cahyadi Kamal Irwanto, Muhammad Agus Laksono, FX Anjar Tri Mahmud, Daniel Maulana, Alfian Maulina, Afifah Nurul Mochammad Aziz, Mochammad Pratama, Donny Rusdian Putri, Ratih Hardini Kusuma Sachrul Iswahyudi Sari, Avellyn Shintia Sari, Mega Mutiara Siamashari, Muhammad Abdurrozak Sunan, Huzaely Latief Suryawan, I Wayan Koko Thar, Ines Adnan Usman Usman Wang, Tsai-Ping Warner, Jeffrey