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.

Indexed in Sinta, S3.

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.

Indexed in Scopus.

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.

Indexed in Scopus.

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.

Indexed in Scopus.

Karya Murni is one of the areas in the northern arm of Sulawesi that has been tectonically influenced. Tectonic processes have implications for the formation of rocks and geological features that have the potential to be developed into geodiversity sites. The development of geological features as a geodiversity site in aspiring geopark Gorontalo can protect valuable geological features from frequent degradation. This research aims to analyze and conduct quantitative assessments of geological diversity in Karya Murni, Gorontalo. The research method used is field observation, laboratory analysis, and geodiversity assessment. Field observations included observing landform, collecting rock samples, and measuring geological structures. Field observations were also carried out to observe aspects of the geodiversity assessment which included science, education, tourism, and risk degradation. Laboratory analysis consists of geomorphological analysis, petrographic analysis, and geological structure data analysis. Geodiversity assessment uses the Geological Survey Center of Indonesia assessment. The results suggest that the geomorphology of the study area can be divided into four geomorphic units-the volcanic hills, denudational hills, Karst hills, and fluvial plain units. The stratigraphy of the research area is divided into four units from the age of the early Eocene to the Holocene-the andesite lava, volcanic breccia, reef limestone, and alluvial deposit units. The geological structure of the study area is a trending northeast–southwest to northwest–southeast. Active faults at the location of the study area consist of the Apitalawu normal fault. At recent states, generally geosites of the Karya Murni have moderate scientific values, the low educational and touristic values and high risk of degradation. The geodiversity potential of the research area can be utilized for further research and education.

Arifin, Y. I., Pattiro, W. M., Manyoe, I. N., Napu, S. S. S., & Sugawara, H. (2023). Analysis and quantitative assessment of geodiversity at Karya Murni, Gorontalo, Indonesia. Geo Journal of Tourism and Geosites, 48, 763-773.

Indexed in Scopus, Q1.