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All Journal Jurnal Aplikasi Fisika Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geomine PROMINE Journal of Physics and Its Applications Jurnal Geosains dan Teknologi Jurnal GEOSAPTA JAGAT (Jurnal Geografi Aplikasi dan Teknologi) JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Ophiolite : Jurnal Geologi Terapan Jurnal Rekayasa Geofisika Indonesia Jurnal Rekayasa Geofisika Indonesia International Journal of Acta Material
Suryawan Asfar
Department Of Geological Engineering, Faculty Of Mathematics And Natural Sciences, Halu Oleo University, Bumi Tridharma Green Campus, Anduonohu, Kendari City, Southeast Sulawesi 93232, Indonesia.
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Other

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Metamorphic Fasies of Metamorphic Rocks in the Mekongga Complex, Loea Region, East Kolaka Regency, Southeast Sulawesi Province Sugiono; Hasria; S. Asfar; L. O. Ngkoimani; Muliddin
International Journal of Acta Material Vol. 2 No. 2 (2026): February 2026
Publisher : Faculty Mathematics and Natural Sciences, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62749/ijactmat.v2i2.28

Abstract

Metamorphic rocks in the study area are part of the Mekongga Metamorphic Complex which is Carbon age. It was interpreted as part of the Malihan complex in southeast sulawesi arm. Administratively located in the area of Loea, Kolaka Timur district, Southeast Sulawesi. Geographically located in coordinates 121°53'0"-121°54'30"(BT) and 04°04'0"- 04°05'30" (LS). The purpose of this research is to identify the types of rock and metamorphic facies present in the Loea area. The research sample is used for petrographic analysis to determine rock types and their mineral composition. The result of petrography analysis shows that the study consisted of metamorphic rocks, namely muscovite schist, muscovite-quartz schist, and graphite-quartz schist, has texture in schistose texture, a lepidoblastic mineral form, and mineral composition that consists of quartz, muscovite, biotite, chlorite, graphite, and opaque minerals. Mineralogical data of metamorphic rock indicate that the metamorphic facies in the research area is greenschist, with muscovite, chlorite, and quartz as its constituent minerals, formed at 300˚C-400˚C.
Detection of Altered Rock Zones by Applying the Essential Analyses of the Magnetic Method: A Case Study from the Lainea Geothermal Site, Southeast Sulawesi La Hamimu; Al Rubaiyn; Suryawan Asfar; Laode Ihksan Juarzan; Indrawati Indrawati
Journal of Physics and Its Applications Vol 8, No 2 (2026): May 2026
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v8i2.30681

Abstract

The essential analyses in the magnetic method are fundamental approaches of geophysical studies that should be commonly applied for interpreting the magnetic data. In this study, the essential analyses of the magnetic method incorporated several fundamental techniques such as analytic signal processing, upward continuation technique, horizontal gradient method (HGM), tilt angle derivative (TDR), and Euler deconvolution. These techniques were successfully applied to process the field data acquired from the Lainea geothermal site, South Konawe District, Southeast Sulawesi Province, Indonesia. The results of the magnetic data processing were then analyzed to characterize the anomaly sources. This analysis is applied to the total magnetic intensity (TMI). Based on the application of all essential stages in processing and analysis of magnetic data, it was found that signal analysis and Euler deconvolution were effective and efficient in analyzing the magnetic anomaly source. Furthermore, from the TMI map it can be verified that a positive anomaly trend corresponding to the main fault and formation distribution. The HGM implementation can accurately detect the edge boundary of the body anomaly in the form of the altered rock. Here, there are several magnetic lineation paths trending in the north-south (N-S), northeast-southwest (NE-SW), and northwest-southeast (NW-SE) directions. The combined results of TDR and Euler deconvolution can completely show the detection of edge and depth of the anomaly. In particular, the altered rock zones can be specifically found at Boroboro fault, Windo fault, Kaindi fault, Laindi fault, and Lainea fault. A contact anomaly indicating rock intrusion was detected at a depth of 1300–1500 m, which may be associated with the development of altered rock zones.
Co-Authors - Ernayanti Adi Pangestu Adriyansyah Adriyansyah Ahmad Londir Akhiruddin Akhiruddin Al Firman Al Rubaiyn Al Rubaiyn Ali Okto Ali Okto Arisona Arisona Ashri Al Mujaadilah Sadikin Asmawati Asmawati Asniar Asniar Dimas Bayu Zainuddin Erick S Ervan Rizqullah Tawakkal Erzam S. Hasan Golok Jaya, La Ode Muhammad Ham Karim Hasria Hasria Hasria Hasria Hasria Hasria Hasria Hasria Hasria Hasria Hasrul Hasrul Ido, Irfan Indrawati Indrawati Irawati Irawati Irfan Ade Hidayat Rantu Isran Naim Jahiddin Jahiddin Jahidin Jahidin Jahidin Jamhir Safani Jaya, Rio Irhan Mais Cendra Khalifa Akbar L M Iradat Salihin L O Ngkoimani L. O. Ngkoimani La Aba La Hamimu La Hamimu La Hamimu La Ode Andimbara La Ode Ngkoimani La Ode Ngkoimani La Ode Ngkoimani La Ode Ngkoimani La Ode Rusman La Ode Sahiddin Laode Ihksan Juarzan Laode Muhammad Farhan Laode Ngkoimani Laode Ngkoimani LO Ngkoimani LO. Ngkoimani Makkawaru, Andi Martono Masri Masri Mili, Marwan Zam Mirnayanti Karim Muhammad Arba Azzaman Muliddin Muliddin Peky Anggriawan Putri Bintang Restele, La Ode Reza Pasca Purniawan Misu Rika Yustika Risal Sepdiansar Sawaludin Sugiono Supriati Supriati Usmardin Usmardin Wahab