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All Journal Jambura Geoscience Review Geosfera: Jurnal Penelitian Geografi JAGE
Alifia Widya Warapsari Badaru
Gorontalo State University
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Social Sciences

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Geologi Daerah Dimito dan Sekitarnya Kabupaten Boalemo Provinsi Gorontalo Alifia Widya Warapsari Badaru; Fitryane Lihawa; Intan Noviantari Manyoe
Jambura Geoscience Review Vol 1, No 1 (2019): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jgeosrev.v1i1.2034

Abstract

Administratively, the research area covers two districts, Wonosari Sub-district and Dulupi Sub-district, Boalemo District, Gorontalo Province. Based on the physiography of the Gorontalo region, the research area which is included in the southern mountain zone of Bone-Tilamuta-Modello generally consists of ancient volcano-sedimentary rock formations in Gorontalo, the Eocene-Oligocene. The purpose of this geological research is to discover the geological order that developed in the area of Dimito and surrounding are as covering several aspect such as geomorphology, stratigraphy, geological structure, and geological history. The result shows that the geomorphology of the research area divided into three geomorphic units, namely the units of the Alluvial Plain, Volcanic Hills, and Denudasional Hills. Stratigraphy of the research area divided into five types of units sorted from the early Miocene to the Holocene, i.e., Lava Basal Dimito (Early Eocene), Wackestone Dimito (Early Eocene), Andesit Kalidingin (Middle Miocene), Granodiorite Bualo (Middle Pliocene), and Alluvial Buaolo (Recen). Geological structures that work on the location of the research area relatively trend from northeast-southwest to northwest-southeast. Fault working on the location of the research area from the data processing consists of Normal Left Slip Fault Kalidingin and Lag Left Slip Fault Bualo.
Variasi Tekstur Serpentinisasi Lherzolit dan Harzburgit Ofiolit Banggai: Implikasi Petrogenesis dan Evolusi Mantel Alifia Widya Warapsari Badaru; Ni Luh Ananda Pusvita Sari; Mohamad Sayid Rahmat; Mohammad Ridho Paudi; Moh Fadlyansyah T
Geosfera: Jurnal Penelitian Geografi Vol 4, No 2 (2025): Geosfera : Jurnal Penelitian Geografi
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/geojpg.v4i2.37558

Abstract

Serpentinized ultramafic rocks from the Banggai Ophiolite Complex, part of the East Sulawesi Ophiolite Belt in Central Sulawesi, preserve important records of geodynamic history and fluid-rock interaction in oceanic lithosphere. This study analyzes mineral composition, serpentinization textures, and petrogenetic implications of three drill core samples from borehole NA2, Banggai Regency. The study aims to characterize lithological and serpentinization texture variations across different peridotite types. Petrographic analysis was performed on thin sections using polarizing light microscopy; rock classification used the Streckeisen ultramafic rock classification diagram. Two samples were identified as serpentinized lherzolite with olivine content 35-40%, orthopyroxene 14-15%, clinopyroxene 13-20%, and one sample as serpentinized harzburgite with very high orthopyroxene (38%) and very low clinopyroxene (5%). Three serpentinization textures were identified: mesh texture after olivine in all three samples, bastite texture after pyroxene in one lherzolite only, and cataclastic texture in the second lherzolite only. The heterogeneous texture distribution indicates local structural control on serpentinization rather than uniform pervasive alteration. Clinopyroxene depletion contrasts between lithologies reflect heterogeneous partial melting degrees within a single ophiolite mantle segment.
Identifikasi Sebaran Kadar Ni Menggunakan Metode Hand Auger Desa Molino, Kabupaten Morowali Utara, Sulawesi Tengah Moh Al-Fayedh; Muh Kasim; Ronal Hutagalung; Alifia Widya Warapsari Badaru
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.33756

Abstract

One of the regions in Indonesia with potential laterite nickel deposits is North Morowali, where the MTosu Formation, composed of Cretaceous-aged ultramafic rocks, is found. This study aims to identify the distribution of laterite and nickel content using data from Hand Auger analysis. The methods used include field observations, Hand Auger sampling, and geochemical analysis through X-Ray Fluorescence (XRF). The research area features two main geomorphological units: structural steep hills and structural gentle hills. Its stratigraphy consists of lherzolite and serpentinite units. The dominant geological structure trends northeast-southwest, following a linear pattern. Laterite distribution in the area is controlled by topography. Nickel content is categorized into three zones: high, medium, and low. XRF analysis of Hand Auger samples indicates that high nickel concentrations are located in the southwest and extend northeast across the study area.
Karakteristik Geomorfologi dan Proses Pembentukannya di Daerah Tilangobula, Kabupaten Bone Bolango Slamet Slamet; Yayu Indriati Arifin; Muh Kasim; Alifia Widya Warapsari Badaru
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.36988

Abstract

This study examines the geomorphological characteristics of Tilangobula Village in East Suwawa District, Bone Bolango Regency, Gorontalo Province, Indonesia, located within the tectonically active Limboto Zone. Through integrated field observations and geospatial analysis—including topographic maps, slope gradients, and drainage patterns—the research identifies structural hills as the dominant geomorphological unit, covering 2.356 km² with elevations ranging from 200 to 600 meters above sea level. The area exhibits two distinct drainage patterns (parallel and trellis) and variable slope gradients (2–140%). Morphogenetic analysis reveals the landscape has been shaped by both endogenic processes (notably oblique faulting, specifically a Normal Left Slip Fault) and exogenic factors (erosion of diorite and quartz diorite intrusions). The lithology comprises intrusive igneous rocks (diorite and quartz diorite), with structural features such as shear joints and faults further influencing the terrain. The findings highlight the interplay between tectonic forces and surface processes in forming the region’s unique structural hills, characterized by V-shaped valleys and steep slopes. This study provides critical baseline data for understanding understudied tectonic landscapes in eastern Indonesia and supports applications in regional geological research and land-use planning. The results underscore the importance of integrating morphographic, morphometric, and morphogenetic analyses to decipher complex geomorphological evolution in tectonically active regions.
Co-Authors Fitryane Lihawa Intan Noviantari Manyoe Moh Al-Fayedh Moh Fadlyansyah T Mohamad Sayid Rahmat Mohammad Ridho Paudi Muh Kasim Muh Kasim Ni Luh Ananda Pusvita Sari Ronal Hutagalung Slamet Slamet Yayu Indriati Arifin