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All Journal Jurnal RISET Geologi dan Pertambangan Jurnal Teknik : Majalah Ilmiah Fakultas Teknik Unpak Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti JUARA: JURNAL WAHANA ABDIMAS SEJAHTERA Petro : Jurnal Ilmiah Teknik Perminyakan Journal of Geoscience Engineering and Energy (JOGEE) JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Jurnal Eksakta Kebumian
Fajar Hendrasto
Universitas Trisakti
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PENGGUNAAN SINAR INFRA MERAH UNTUK DETEKSI PANAS BUMI DAERAH SANGKANHURIP, KUNINGAN, JAWA BARAT Sumotarto, Untung; Hendrasto, Fajar; Anugrahadi, Afiat; Purwiyono, Taat Tri; Ashari, Wahyu Robiul
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Volume 9, Nomor 1, Januari 2024
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v9i1.16916

Abstract

Geothermal resources can be explored with aerial photographs followed by surveys and analysis of geological, geochemical and geophysical data as well as shallow drilling. This research was conducted to determine the potential of geothermal resources using a camera capable of capturing infrared rays from objects and photo targets.Geothermal exploration is generally carried out with an initial survey using remote imagery and aerial photography techniques. Taking photos using a tool equipped with a Thermal Infrared Sensor (TIRS), namely a camera equipped with Forward Looking InfraRed (FLIR).The initial survey in this study was conducted at five locations of geothermal springs in the Sangkanhurip area, Kuningan, West Java. From these five locations using FLIR cameras detected geothermal resources with hot spring temperatures between 30 to 40 degrees Celsius.To find out the types of rocks that exist, a geological survey was carried out to make a geological map. The data and information obtained are then analyzed to obtain a map that displays geology with surface temperature data in the study area.This map can be utilized by companies interested in exploring and producing geothermal energy for use as a source of energy for Geothermal Power Generation (PLTP). Further analysis can be carried out with the Geochemical Method for predicting subsurface temperature. This discovery fulfills the research objective of detecting geothermal resources using infrared rays.
PENENTUAN ZONA PROSPEK PANASPENENTUAN ZONA PROSPEK PANAS BUMI ‘‘AR‘‘ MENGGUNAKAN METODE DENSITAS SESAR DAN REKAHAN - DETERMINATION OF GEOTHERMAL PROSPECT ZONE ‘‘AR‘‘ USING FAULT AND FRACTURE DENSITY (FFD) METHOD Pramudito, Andaru; Hendrasto, Fajar; Setyorini, Dyah Ayu; Hariyadi, Nurkholis
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Volume 10, Nomor 1, Januari 2025
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v10i1.21971

Abstract

Geothermal exploration requires efficient and reliable methods for assessment of surface conditions. One such method is the Fault and Fracture Density (FFD) method, which involves the analysis of faults and fractures intensity within a geothermal area. The FFD method is widely used in geothermal exploration as it provides important information about the structural properties of a geothermal field. This method allows for the delineation of fault and fracture zones, which are crucial components of a geothermal system. These fault and fracture zones correspond to the reservoir of geothermal systems, as they provide pathways for fluid flow and heat transfer. The FFD method is particularly useful in the early-stage exploration of geothermal resources as it provides an estimation of geothermal prospect area distribution. The method calculates the intensity of faults and fractures within a given area. The FFD contour delineation as a geothermal prospect zone is in the contour range of 2-4 km/km2, which is located in the southeast and center of the "AR" geothermal field. This area has a highest lineament density intensity. The Way Wejak Fault, Watuwater Fault and Atalojo Fault are found on an FFD contour of 2-4 km/km2, this confirms that these three faults act as permeable zones where geothermal fluids come out from below to the surface which is related to the presence of geothermal manifestations along the faults which shows that these three faults are directly connected to the reservoir zone.
PEMANFAATAN ENERGI PANAS BUMI UNTUK RANCANG BANGUN DAN PEMASYARAKATAN ALAT PENGERING HASIL PERTANIAN DAN PERKEBUNAN Hendrasto, Fajar; Sumotarto, Untung; Meirawaty, Mira; Guntoro, Agus; Fakhmi, Nyco
JUARA: Jurnal Wahana Abdimas Sejahtera Volume 6, Nomor 1, Januari 2025
Publisher : Jurusan Teknik Lingkungan Fakultas Arsitektur Lanskap dan Teknologi Lingkungan, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/vaws9c37

Abstract

Indonesia has considerable potential for its 23.36 MW geothermal energy resource. The resource is utilized not only for indirect uses, such as electric power generation but also for direct uses, such as hot water pool purposes. Traditional drying, which relies on heat energy from the sun, can only be done during the day, and if it rains, drying is hampered. A continuous drying process can produce products with the water content that is not reduced efficiently. The use of geothermal energy can maintain the continuity of the drying process because the heat flow is stable and continuous compared to sunlight. An oven-shaped dryer by the FTKE Community Service Team (PkM) that uses the geothermal energy has been installed and introduced to the community in Ciparay Village, Pamijahan District, Bogor, Wes Java. This PkM Activity aims to provide examples and socialize geothermal energy-powered drying ovens for drying agricultural and plantation products. The method is to survey geothermal energy potential, conduct design work, and introduce a drying oven for agricultural products. This tool is hoped to help local communities dry agricultural and plantation products, such as tea leaves, grains, and various other agricultural and plantation products. With these result, it is hopes that this tool can be used by group of farmers and planters in other locations with geothermal energy resources. The PkM FTKE team has applied a similar drying tool in geothermal prospect areas in the Cisolok (Sukabumi), Batukuwung (Serang), and Ciseeng-Parung (Bogor). 
A REVIEW OF GEOPHYSICS STUDY OF GRAPHITE OCCURRENCES IN BALAI SEBUT COMPLEX, SANGGAU, WEST KALIMANTAN Maulana, Rizki Fajar; Sulyana, Deska; Meirawaty, Mira; Yuda, Himmes Fitra; Hendrasto, Fajar; Wijaya, Budi; Apriniyadi, Mohammad
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 1, FEBRUARI 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v6i1.22455

Abstract

Graphite is a non-metallic polymorph mineral formed by carbon. Graphite has become indispensable in the worldwide industry due to its widespread applications, such as industrial uses, energy transition, and even electricity. It is a critical anode element for lithium-ion batteries. Graphite has unique physical characteristics. It has a very low specific gravity and is an extraordinarily soft but highly conductive material. It is exceptionally heat-resistant, making it applicable in metallurgy and manufacturing. Due to all characteristics, graphite occurrences in Indonesia are slightly unknown. In contrast, there is a possibility, according to some Palaeozoic metamorphic host graphite in several parts of Indonesia. This study will enlighten early-step exploration of graphite potency in Balai Sebut, Sanggau Regency, and West Kalimantan. We combined airborne and ground geophysics using Active Directory Magnetotelluric (ADMT) tools to estimate graphite distribution on the surface and subsurface. We also did laboratory analysis to validate graphite content using petrography analysis, X-ray diffraction (XRD), and carbon analyzer (LECO) of some representative graphite-bearing rock from fieldwork. Graphite in the research area is exposed to the surface, like in Empiyang, whereas potential graphite in the Terati area lies 0-6 m below the subsurface. Petrographic analysis shows that graphite occurs as flake graphite that is characterized by widespread distribution with low thickness. Both LECO and XRD confirmed the occurrence of these graphite-bearing rocks, with the total amount of graphite ranging from 0.91‒1.58%. This research is expected to provide suggestions in the early stage of graphite exploration based on thematic cases as graphite occurrences in the Balai Sebut area.
MODEL KONSEPTUAL HIDROGEOLOGI LAPANGAN PANAS BUMI "XB" NUSA TENGGARA TIMUR MENGGUNAKAN METODE GEOKIMIA FLUIDA: HYDROGEOLOGICAL CONCEPTUAL MODEL OF "XB" GEOTHERMAL FIELD IN EAST NUSA TENGGARA USING FLUID GEOCHEMICAL METHOD Dwi Aldhi Putra, Dimas; Hendrasto, Fajar -; Hariyadi, Nurkholis; Fajar
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 2, AGUSTUS 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Daerah "XB" di Pulau Flores, Provinsi Nusa Tenggara Timur (NTT) memiliki potensi sumber daya panas bumi yang belum sepenuhnya dikembangkan. Untuk mengoptimalkan dan pengembangan sumber daya panas bumi tersebut dibutuhkan pemahaman tentang sistem panas bumi dan pembuatan model konseptual hidrogeologi berdasarkan atas data geologi dan data geokimia yang tersedia. Metode yang dilakukan dalam penelitian ini adalah menganalisis dan mengolah data-data sekunder yang berkaitan dengan geologi dan geokimia di daerah "XB". Data-data tersebut kemudian dianalisis dan diinterpretasikan untuk membentuk model konseptual hidrogeologi. Lapangan panas bumi "XB" memiliki 22 jenis sampel air yang terdiri atas mata air panas di daerah "XB" serta mata air hangat dan mata air dingin yang terdapat di daerah Lungar. Tipe mata air panas Lapangan "XB" terdiri atas dua jenis tipe air, yaitu air sulfat dan air bikarbonat. Hasil analisis geoindikator air yang terdiri atas rasio Na/K, rasio Na/Ca, dan rasio SO4/HCO3 terdapat pola zona upflow dan outflow. Zona upflow terdapat pada bagian timur laut dari Lapangan "XB" yaitu terletak di daerah Lungar dan Wewo. Sedangkan zona outflow terdapat di bagian barat daya Lapangan "XB", yaitu terletak di daerah Paka. Model konseptual hidrogeologi panas bumi memperlihatkan adanya sumber panas yang berasal dari magmatic fluid, yang mengeluarkan uap panas ke permukaan melalui proses konduksi antara air dan batuan dan muncul ke permukaan sebagai manifestasi berupa fumarol. Manifestasi fumarol tersebut terletak di daerah Lungar dan "XB" yang diinterpretasikan sebagai zona upflow. Aliran fluida yang mengalir secara lateral yang keluar dari celah-celah rekahan diinterpretasikan sebagai zona outflow, yang terdapat di daerah Paka, pada lokasi mata air hangat WKO2 dan WMT1. The "XB" area on Flores Island, East Nusa Tenggara (NTT) Province, has potential geothermal resources that have not been fully developed. To optimize and develop these geothermal resources, an understanding of the geothermal system is needed to create a hydrogeological conceptual model based on available geological and geochemical data. The method used in this research is to analyze and process secondary data related to geology and geochemistry in the "XB" area. These data were then analyzed and interpreted to form a hydrogeological conceptual model. The "XB" geothermal field has 22 types of water samples - hot springs in the "XB" area and warm springs, and cold springs in the Lungar area. The "XB" field hot spring type consists of two kinds of water: sulfate water and bicarbonate water. The results of water geoindicator analysis consisting of the ratio of Na/K, the ratio of Na/Ca, and the ratio of SO4/HCO3 obtained upflow and outflow zone patterns. The upflow zone is located in the northeastern part of the "XB" field, which is located in the Lungar and Wewo areas. Meanwhile, the outflow zone is located in the southwestern part of the "XB" field, which is located in the Paka area. The geothermal hydrogeological conceptual model shows a heat source originating from the magmatic fluid, which emits hot steam to the surface through a conduction process between water and rock and appears on the surface as a manifestation of fumaroles. The fumarole manifestations are located in the Lungar and "XB" areas, interpreted as upflow zones. The fluid flow that flows laterally out of the cracks from the fracture is interpreted as an outflow zone in the Paka area at the location of the WKO2 and WMT1 warm springs.
Co-Authors Adrian Febrianto Hanggoro Afiat Anugrahadi, Afiat Agus Guntoro Amri, Muhammad Adimas Arthur G.P. Nayoan Ashari, Wahyu Robiul Bambang Sunarwan Bambang Sunarwan Benyamin Benyamin Sapiie Budi Wijaya Budi Wijaya Denny Suwanda Djohor Dhimas R. Utomo Dwi Aldhi Putra, Dimas Dzaky Sotha Dzaky Sotha Eko Widianto Evan Reystephen Sammuel Evan Reystephen Sammuel Faiz Fazli Fajar Fakhmi Idzni Faza Fakhrudin Fakhmi, Nyco Fazli, Faiz Graniko Reza Utama Guntoro, Agus Hapsari Nurhaniya Hariyadi, Nurkholis Julius Leonardo Simamora Lambok Hutasoit Mahabbatan, Raizar Maulana, Rizki Fajar Meirawaty, Mira Mira Meirawaty Mira Meirawaty Mohammad Apriniyadi Muhammad Aisy Omar Nurkholis Hariyadi Pramudito, Andaru Purwiyono, Taat Tri Ramadhan Adhitama Ramadhan Adhitama Sekar Ayu Citrowati Setyorini, Dyah Ayu Sofyan Rachman Sulyana, Deska Sumotarto, Untung Syahril Badri Kusuma Syavitri, Dewi Thoriq Muzakki yudistian Untung Sumotarto Untung Sumotarto Untung Sumotarto Wahyu Robiul Wahyu Robiul Ashari Yuda, Himmes Fitra Yudistian Yunis Yudistian Yunis