Artikel

31 Mei 2026

Sumatra has more than 20 geothermal areas the associated with Sumatra Fault System and volcanic system along Barisan Range. Grao Sakti is a geothermal area in Renah Kemumu, Jangkat District, Merangin Regency, Jambi, such a characteristic. Geochemical data is a part of early geothermal exploration for identification fluid type, estimating temperature geothermal reservoir, and assessment geothermal system. We used two geothermal fluids manifestation sample for geochemical analyzed. These three methods for determining fluids geothermal characteristic, including of geothermal fluids type, geothermal of partial chemical equilibrium, and solute geotermometers. Geothermal manifestation is consist of geyser and hot spring with temperature about 66.8°C - 91.5°C. The result analysis Cl-SO4-HCO3 to show chloride fluid type, as indicated of fluid geothermal reservoir. Geothermal fluid of Na-K-Mg on partial chemical equilibrium as clue geothermal fluids of boiling condition. Solute geotermometers used to approach silica geotermometer about 146.50°C - 72.24°C, while solute sodium-potassium geothermometer about 203.19°C - 206.18°C. Geothermal fluids of geochemical analysis as ........

31 Mei 2026

Using hydrogen as an energy source still needs improvement, especially in storing hydrogen. Zeolite is a material with a large surface area and high porosity. When NaOH is added to natural zeolite Bogor, it breaks down into microporous (2 nm) and mesoporous (2–50 nm) zeolite. This zeolite with two different sizes of pores is called hierarchical zeolite. The wet impregnation method mixed Ni with zeolite using Ni(NO3).6H2O, which lets H2 adsorb through a spillover mechanism. The characterization of the materials was analyzed using a Particle Size Analyzer (PSA), X-ray diffraction (XRD), and a Surface Area Analyzer (SAA). Temperature-programmed desorption-H2 (TPD-H2) determined the adsorption capacity for H2 gas. The adsorption capacity of H2 for different adsorption times (30, 45, 60, 75, and 90 min) was 0.1745, 0.3620, 0.7624, 0.2333, and 0.1802wt%, respectively. The highest adsorption capacity is 0.7624 wt.% with 60 min of adsorption time. When Ni metal was added to zeolite, it blocked or clogged the pores, lowering the adsorption capacity to 0.1405 wt.% and making H2 adsorption less efficient. ........

31 Mei 2026

The Dikit fault segment is part of Sumatran Fault Zone on Grao Sakti, Merangin Regency, Jambi, Indonesia. It has been subjected of scientific research interest for decaded. The geothermal manifestations appears along fault segmented and structural features are the principal displacement zone and related to strike slip fault zone. This fault segmented is related strike slip fault zone, where flowing Grao stream. This paper aim to understanding releasing bend structure process the related strike slip fault zone of Dikit fault segmented. Structural element measurement was employed to determine the orientation of structural and the dynamics of the structures. Each structural element measured attempt to analyzed for understanding the structural evolustion of Dikit fault segment. The integration to structural element measured and structural analysis to generate of structural model the releasing bend structure of Dikit fault segment. The stratigraphy is composed of Oligo-Miocene Andesitic Lava-Volcanic Breccia, Pleistocene Granitic Intrusion, and Old Masurai Volcanic Dacitic Lava. The results of research area show that fault orientation of approximately in NW - SE ........

31 Mei 2026

Air terjun Muara Karing termasuk ke dalam kawasan Geopark Merangin yang menjadi tujuan wisata alam. Di Kawasan Air Terjun Muara Karing, perifiton yang menempel pada substrat batuan menjadi produsen dalam ekosistem lotik. Beradaptasi dengan lingkungan air yang deras, perifiton mampu bertahan di dasar berbatu yang melimpah di Kawasan Air Terjun Muara Karing Geopark Merangin. Penelitian ini akan mengeksplorasi kelimpahan perifiton pada substrat batu di Air Terjun Muara Karing untuk memberikan informasi tentang keanekaragaman biologi di kawasan tersebut. Penelitian ini dilaksanakan pada Oktober 2022-Juni 2023 dengan metode purposive sampling. Data mengenai kelimpahan perifiton dan faktor-faktor abiotik perairan telah dirangkum dalam tabel untuk menunjukkan nilai-nilai di tiap stasiun. Kemudian, data ini dianalisis secara deskriptif. Secara keseluruhan kelimpahan perifiton yang didapatkan yaitu sebanyak 2.505 individu /125cm2 dari ketiga stasiun dengan uraian secara berurutan yaitu 1.554; 461; dan 490 individu /125cm2. Diperoleh 17 jenis perifiton yang termasuk ke dalam dua kelas, yaitu Bacillariophyceae (99,72%) dan Zygnematophyceae (0,28%). ........