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All Journal JGE (Jurnal Geofisika Eksplorasi) International Journal of Hydrological and Environmental for Sustainability Sultra Journal of Mechanical Engineering
Nompo, Supardin
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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MODEL OF LATERITE NICKEL DEPOSITS BASED ON LGSO AND HGSO VALUES PT MITRA KARYA AGUNG LESTARI Asmiani, Nur; Thamsi, Alam Budiman; Nompo, Supardin; Bakri, Suryanto; Tukloy, Muh. Yusril Affandy; Harmitun, Harmitun
JGE (Jurnal Geofisika Eksplorasi) Vol 10, No 1 (2024)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v10i1.305

Abstract

The laterite nickel deposit model provides information about the form of laterite nickel deposits below the surface, which can be used as one of the considerations in the implementation of mining activities. The purpose of conducting this research is to determine the distribution model of nickel laterite deposits in 3 dimensions (3D) and to determine the amount of nickel laterite reserves based on high-grade saprolite ore (HGSO) and low-grade saprolite ore (LGSO) values in the DH Block. In this research, Inverse Distance Weighted (IDW) is used to estimate nickel laterite resources, which are applied using mining software Surpac 6.3.2 to produce a model in 3D form. The data used are laterite nickel content data (assay), x, y, and z coordinate data (collar), survey data, and lithology data. Based on IDW estimation results with a Cut Off Grade (COG) value of 1.3 in the DH Block of PT Mitra Karya Agung Lestari, High-Grade Saprolite Ore (HGSO) values were obtained at Ni content 1.7 and Low-Grade Saprolite Ore (LGSO) at Ni content 1.3, with a tonnage value of 111.994 tons of HGSO and 371.044 tons of LGSO.
Analysis of Reservoir Temperature Estimation using Major Elements in Sulili Geothermal Field, South Sulawesi, Indonesia: Implications for Geothermal Energy Forecasts Umar, Emi Prasetyawati; Wakila, Hardin; Aulia, Rizky Nurul; Pongkessu, Agriani; Nompo, Supardin; Jamaluddin, Jamaluddin
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 1 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i1.568

Abstract

Geothermal is a natural resource energy in the form of hot water or steam that forms in reservoirs within the earth through the heating of subsurface water by hot igneous rocks. Based on field surveys, the Sulili area shows characteristics of geothermal energy in the form of hot springs. The research aims to use the Na-K geothermometer to find out the temperature of the geothermal reservoir below the ground and the Na-K-Mg geothermometer to look into the type of fluid that is in the geothermal reservoir. The research employs the geochemical analysis method in conjunction with the Na-K geothermometer method. Reservoir subsurface temperature is estimated at EPU station 1 at 326.504°C, EPU station 2 at 473.369°C, and station EPU 3 at 456.508°C. According to the results, the hot springs at the three sites are chlorides with temperatures below ground that are part of the high-temperature geothermal system and are >225°C. The hot spring is in the immature water group. Based on the calculation, the Sulili Geothermal Field with an average reservoir temperature of 418°C is approximately 68.33 MWh. This is a simplified calculation, and actual energy output can vary based on several factors, including the specific characteristics of the geothermal reservoir and the efficiency of the power plant.
Analisis proksimat, ultimat, dan kadar sulfur dalam penentuan kualitas batubara pada formasi bobong Pulau Taliabu-Maluku Sardi, Bambang; Ripky, Moh; Marhum, Fitrawati; Nompo, Supardin; Arif, Muhammad
Sultra Journal of Mechanical Engineering Vol. 2 No. 1 (2023): Sultra Journal of Mechanical Engineering
Publisher : Program Studi Teknik Mesin, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Salah satu parameter utama yang menentukan suatu kegiatan pengolahan dan pemanfaatan bahan galian batubara adalah kualitas batubara. Di daerah penelitian terdapat singkapan batubara yang perlu dilakukan analisis proksimat, ultimat, dan kadar sulfur. Sampling dilakukan pada lapisan batubara pada Formasi Bobong yang tersingkap pada beberapa singkapan. Kemudian sampel A dan sampel B dianalisis di laboratorium. Hasil analisis di laboratorium yaitu analisis proksimat sampel A untuk moisture in air dried (6,54%), ash content  (11,86%), volatile matter  (43,56%)  dan fixed carbon (38,05%). Selain itu, hasil analisis ultimat seperti carbon (74,75%), hydrogen (6,87%), nitrogen (0,76%), oxygen (12,21%), dan kadar sulfur (4,41%), serta pengukuran sulfur total (5,40%). Dari hasil tersebut dapat disimpulkan bahwa batubara sampel A merupakan batubara kelas bituminus pada grup high volatile C bituminous coal (ASTM D 388). Sedangkan, hasil analisis sampel B yaitu moisture in air dried (12,23%), ash content  (13,60%), volatile matter (36,05%) dan fixed carbon (38,13%). Selain itu, untuk hasil rata-rata kandungan ultimat seperti carbon (70,70%.daf), hydrogen (6,22%), nitrogen (0,85%), oxygen (11,99 %), dan kadar sulfur (7,60%), serta pengukuran sulfur total (10,25%). Dari hasil tersebut dapat disimpulkan bahwa batubara pada sampel B termasuk dalam kelas sub-bituminous pada grup A sub-bituminous coal (ASTM D 388). Kedua sampel dari Formasi Bobong ini, jika ditinjau dari sulfur total menunjukkan kualitas batubara kurang baik untuk diperuntukkan sebagai bahan-bakar (steaming coal) menurut Polish Geological Institute (PGI).
MODEL OF LATERITE NICKEL DEPOSITS BASED ON LGSO AND HGSO VALUES PT MITRA KARYA AGUNG LESTARI Asmiani, Nur; Thamsi, Alam Budiman; Nompo, Supardin; Bakri, Suryanto; Tukloy, Muh. Yusril Affandy; Harmitun, Harmitun
JGE (Jurnal Geofisika Eksplorasi) Vol. 10 No. 1 (2024)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v10i1.305

Abstract

The laterite nickel deposit model provides information about the form of laterite nickel deposits below the surface, which can be used as one of the considerations in the implementation of mining activities. The purpose of conducting this research is to determine the distribution model of nickel laterite deposits in 3 dimensions (3D) and to determine the amount of nickel laterite reserves based on high-grade saprolite ore (HGSO) and low-grade saprolite ore (LGSO) values in the DH Block. In this research, Inverse Distance Weighted (IDW) is used to estimate nickel laterite resources, which are applied using mining software Surpac 6.3.2 to produce a model in 3D form. The data used are laterite nickel content data (assay), x, y, and z coordinate data (collar), survey data, and lithology data. Based on IDW estimation results with a Cut Off Grade (COG) value of 1.3 in the DH Block of PT Mitra Karya Agung Lestari, High-Grade Saprolite Ore (HGSO) values were obtained at Ni content > 1.7 and Low-Grade Saprolite Ore (LGSO) at Ni content > 1.3, with a tonnage value of 111.994 tons of HGSO and 371.044 tons of LGSO.
Co-Authors Alam Budiman Thamsi Aulia, Rizky Nurul Bakri, Suryanto Bambang Sardi Harmitun, Harmitun Jamaluddin Jamaluddin Marhum, Fitrawati Muhammad Arif Nur Asmiani Pongkessu, Agriani Prasetyawati Umar, Emi Ripky, Moh Tukloy, Muh. Yusril Affandy Wakila, Muhammad Hardin