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All Journal JGE (Jurnal Geofisika Eksplorasi) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal)
Annisa, Hiskia Ulinuha
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Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Education Physics

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DELINEATION OF ERUPTION PRODUCTS AND GEOTHERMAL PROSPECT ZONES IN MOUNT SLAMET, CENTRAL JAVA USING LANDSAT 8 AND GEOCHEMICAL DATA Annisa, Hiskia Ulinuha; Prasetya, Yogi Adi; Hadna, Zahra Nuraini; Maghfira, Puspita Dian
JGE (Jurnal Geofisika Eksplorasi) Vol. 11 No. 2 (2025)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v11i2.492

Abstract

Mount Slamet, located in Central Java, Indonesia, is one of the promising geothermal prospect areas due to its active volcanic system and distinct surface manifestations such as hot springs and altered grounds. This study aims to identify potential geothermal zones around Mount Slamet by integrating geochemical analysis and remote sensing data. Geochemical measurements from hot springs show temperatures ranging from 48–89 °C, pH values between 6.2–7.1, and elevated concentrations of SiO₂ (90–145 mg/L) and Cl⁻ (18–42 mg/L), indicating high-temperature fluid interaction. Remote sensing techniques, including thermal anomaly detection and alteration mineral mapping using multispectral and hyperspectral satellite imagery, were employed to delineate surface manifestations and hydrothermal alteration zones. The results indicate that the most prospective geothermal area is located in the southwestern part of Mount Slamet, characterized by strong thermal anomalies and geochemical signatures consistent with a high-enthalpy geothermal system. The integration of these methods provides a comprehensive assessment of geothermal potential, revealing key prospect areas with significant thermal anomalies and geochemical signatures indicative of a high-enthalpy geothermal system. These findings enhance understanding of Mount Slamet’s geothermal potential and offer valuable.
Analisis Kestabilan Lereng dengan Metode Kesetimbangan Batas di Tebing Sungai Klawing, Kecamatan Kaligondang, Kabupaten Purbalingga, Jawa Tengah Annisa, Hiskia Ulinuha; Yogi Adi Prasetya; Indra Permana Jati; Hanifah Hamna Lidia
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1469

Abstract

The Alluvium Formation on the hillside around the Klawing River, Kaligondang District, Purbalingga Regency, Central Java, experiences simultaneous landslides. This study examines the influence of lithology and erosion, which erodes the riverbanks, on the occurrence of landslides in the area. Field observations were conducted by determining the landslide position, identifying soil types, measuring slope geometry, determining slope layers, and collecting soil samples from each layer for further analysis. The Klawing River is highly prone to landslides due to its lithology, which is easily weathered and eroded, particularly in claystone and sandstone formations. Additionally, lateral erosion by the Klawing River erodes the slope foot, reducing the base support and increasing the potential for landslides. This research aims to analyze the slope safety factor in landslide-prone areas. The study focuses on the cliffs of the Klawing River, which are divided into three sections: upper, middle, and lower. Soil samples were collected and tested in the laboratory to determine parameters such as specific gravity, internal shear angle, and cohesion. Slope stability analysis was carried out using the Limit Equilibrium method (Morgenstern–Price) with the aid of Geostudio (Slope/W) software. The analysis results indicate the slope safety factor (SF) of the Klawing River, showing that the slope is in an unstable condition and highly susceptible to landslides.
Co-Authors Hadna, Zahra Nuraini Hanifah Hamna Lidia Indra Permana Jati Maghfira, Puspita Dian Prasetya, Yogi Adi Yogi Adi Prasetya