Bentuk Lahan Geomorfologi di Daerah Gunungapi Ambang, Bolaang Mongondow Timur
Sulawesi or Celebes is located in the central part of the Indonesian archipelago which has interesting geological potential to be developed. One of this interesting area is known as Ambang volcano area. Ambang volcano is one of the active volcanoes in North Sulawesi. Administratively, the research area is located in Bongkudai Baru Village, Modayag sub-district, East Bolaang Mongondow district, mapped at coordinates N 0°45'58.89'' and E 124°24'13.04''. This study is aimed to analyze volcanic geomorphological units using satellite imagery and surface geological mapping. The results showed that the geological conditions of the study area consist of 4 lithologies i.e volcanic breccia, andesite, agglomerate and sandstone rocks. Based on the morphographic and morphogenetic analysis of the study area which refers to the Van Zuidam and Verstapen 1985 classification, the study area is divided into five landforms i.e fumarole and solfatara ambang volcanic, ambang volcanic cone, plains and fluvial slope feet of ambang volcano, denudational hill ambang volcanoes and lake units.
Sumarjis, S. A., Arifin, Y. I., Hutagalung, R., Akase, N., & Manyoe, I. N. (2023). Bentuk Lahan Geomorfologi Di Daerah Gunungapi Ambang, Bolaang Mongondow Timur. Journal of Applied Geoscience and Engineering, 2(1), 46-56.
Kompleksitas Tatanan Geologi dan Hubungannya terhadap Sebaran Distribusi Potensi Mineralisasi di Prospek Gadung Sulawesi Tengah
Tatanan geologi dan tektonik yang kompleks menjadi penyebab keterdapatan banyak batuan intrusi untuk membentuk berbagai tipe cebakan mineralisasi pembawa mineral ekonomis. Prospek Daerah Gadung, Kabupaten Buol, Provinsi Sulawesi Tengah memiliki potensi yang besar karena kondisi geologinya yang kompleks, namun penelitian di daerah ini masih sangat kurang dan hanya menggunakan metode stream sediment dalam pengambilan data sehingganya diperlukan adanya penelitian yang terbaru dan detail. Metode yang dilakukan dalam menyelesaikan penelitian ini berupa metode pemetaan geologi semi detail dan channel sampling yang terdiri atas observasi litologi, struktur geologi hingga geomorfologi. Pengambilan sampel batuan untuk dianalisis petrografi dan mineragrafi sebagai data analisis pendukung. Satuan geomorfologi berupa pegunungan aliran lava Gadung dan perbukitan intrusi tinggi Gadung yang dimanfaatkan oleh penambang tradisional. Satuan litologi berupa vulkanik andesit, intrusi monsonit, intrusi monsodiorit, intrusi breksia, intrusi diorit porfiri, dan breksia hidrotermal yang paling banyak keterdapatan mineralisasi ekonomis. Struktur geologi berupa sesar naik dekstral Anoa dan sesar sinistral normal Ladelli yang menjadi jalan bagi intrusi naiknya fluida hidrotermal. Dari hasil penelitian dapat disimpulkan bahwa daerah ini memiliki potensi cebakan mineralisasi karena kehadiran bodi breksia hidrotermal yang besar dan keterdapatan kontrol struktur berupa dilatational jog, dan kehadiran kuarsa vein berupa mineralisasi sulfida pada litologi intrusi monsonit dimana litologi ini menjadi litologi yang mendominasi pada daerah penelitian.
Arifin, Y. I., Manyoe, I. N., Rompo, A. I., & Iswanto, D. Kompleksitas Tatanan Geologi Dan Hubungannya Terhadap Sebaran Distribusi Potensi Mineralisasi Di Prospek Gadung Sulawesi Tengah. Jurnal GEOSAPTA, 9(1), 63-70.
Geomorphological Study of the Talumopatu Geothermal Area Gorontalo Regency Gorontalo Province
Geomorphological research is urgently needed to be carried out in areas with geothermal potential such as in Talumopatu. Geomorphological analysis was chosen to complete the data in the early stages of the geothermal exploration of the study area. The purpose of this study was to determine the geomorphological characteristics of the study area. This study uses image interpretation methods and field excursions to observe the morphology of the study area. The stages of data processing use software applications based on Geographic Information Systems (GIS). The Geomorphological analysis consists of analysis of morphography, morphometry and morphogenesis. The analysis results are then compiled to produce a geomorphological map that refers to the van Zuidam classification. In accordance with the results of the analysis, it can be concluded that the geomorphological condition of the study area is divided into three parts, namely the Alluvial Plain Unit, Peneplains Unit, and Residual Hills Unit.
Hamim, R. H. P., Arifin, Y. I., & Manyoe, I. N. (2023). Geomorphological Study of the Talumopatu Geothermal Area Gorontalo Regency Gorontalo Province. In E3S Web of Conferences (Vol. 400, p. 01005). EDP Sciences.
Geology and Geophysics of Talumopatu Geothermal Manifestation Area of Mootilango District Gorontalo Regency Indonesia
The research aims to assess the geothermal potential and provide a better understanding of the geology and geophysics of the area. The study utilizes various methods, including geological mapping, geochemical analysis, and magnetic and electromagnetic data analysis, to gain insights into the subsurface structures and characteristics of the geothermal system. The study area can be divided into three geomorphological units: Alluvial Plain Unit, Near Plains Unit, and Isolated Hill Unit. The study area exhibits a stratigraphy consisting of three primary units: Talumopatu granite units, Talumopatu sandstone units, and alluvial deposit units. The subsurface lithologies of the Talumopatu manifestation area were analyzed using the Wenner – Alpha configuration ERT method, revealing two distinct lithologies. The first lithology consists of sandstones with a resistivity value ranging from 4.2 to 39.0 ohm.m and a thickness of 1.25 to 12.4 m, which act as a permeable layer capable of transmitting water. The second lithology is granite with a resistivity value ranging from 118 to 360 ohm.m and a thickness of 3.75 to 15.9 m. This information provides valuable insights into the subsurface characteristics of the area, including the presence of permeable layers and the geological composition of the lithologies.
Ayu, D., Arifin, Y. I., Zainuri, A., Manyoe, I. N., & Jahja, M. (2023). Geology and Geophysics of Talumopatu Geothermal Manifestation Area of Mootilango District, Gorontalo Regency, Indonesia. In E3S Web of Conferences (Vol. 400, p. 01013). EDP Sciences.
Lineament Extraction Analysis Using Digital Elevation Model (DEM) in Lahendong Geothermal Area, North Sulawesi
Sulawesi is located in the triple junction which makes it has a high complex tectonic setting implicated for the emergence of geothermal potential. Existing geological structure near the research area is only in the top-right of the research area which far from any of the hot spring points. This research aims to analyze the lineament extraction to find out the alleged structure and the density area to determine the permeability of the Lahendong geothermal area using National Digital Elevation Model (DEMNAS) data imagery. Digital Elevation Model (DEM) data is processed using Remote Sensing Photogrammetry application to produce lineament extraction. Lineament density map is carried out using a Geographic Information System (SIG) application and then processed to generate rosette diagram. Based on the lineament extraction and lineament density analysis result, we can interpret that the Lahendong geothermal area is dominated with high density, which is interpreted as good permeability. Lineaments in the Lahendong geothermal area is northwest-southeast and almost north-south. The extracted lineament is also providing the alleged structure in the research area.
Rauf, J., Kayambo, M. R., Nurjana, I., & Manyoe, I. N. (2023). Lineament Extraction Analysis Using Digital Elevation Model (DEM) in Lahendong Geothermal Area, North Sulawesi. In E3S Web of Conferences (Vol. 400, p. 01009). EDP Sciences.