Karakteristik Kondisi Geologi Daerah Lamo, Kecamatan Pagimana, Kabupaten Banggai, Provinsi Sulawesi Tengah.

Ariyanto Pakaya; Yayu Indriati Arifin; Ninasafitri Ninasafitri

doi:10.37905/jrpi.v3i2.38576

Karakteristik Kondisi Geologi Daerah Lamo, Kecamatan Pagimana, Kabupaten Banggai, Provinsi Sulawesi Tengah.

Ariyanto Pakaya, Yayu Indriati Arifin, Ninasafitri Ninasafitri

Abstract

The East Arm of Sulawesi is an active tectonic zone formed by the collision between the Banggai-Sula microcontinent fragments and the East Sulawesi Ophiolite Complex. This research was conducted in Lamo Village and its surrounding areas, Pagimana District, Banggai Regency, to identify detailed geomorphological, lithostratigraphic, and structural geology characteristics, which currently remain limited. The research methods include field mapping, morphometric analysis using DEMNAS data and structural kinematic analysis using stereographic projection. The results indicate that the geomorphology of the study area is divided into two units: the Structural Hills Unit (slope 2–50%) and the Coastal Plain Unit (slope 0–2%). Lithostratigraphically, the study area consists of a Peridotite Unit covering 23.81 km² and an Alluvial Unit covering 1.83 km². Structural analysis of the Peridotite Unit reveals a high intensity of extension joints with a maximum principal stress (σ1) oriented at 127°/71° (NW–SE).

Keywords

Ophiolite, Peridotite, Extension Joint, Lamo Village, Sulawesi East Arm.

Full Text:

PDF

References

Anderson, E. M., 1951. The dynamics of faulting and dyke formation with applications to Britain. Oliver and Boyd.

Angelier, J. (1984). Tectonic analysis of fault slip data sets. Journal of Geophysical Research, 89(B7), 5835–5848.

Badan Informasi Geospasial. (2025). Seamless Digital Elevation Model (DEMNAS) Indonesia. https://tanahair.indonesia.go.id/demnas

Hall, R., & Wilson, M. E. J. (2000). Neogene sutures in eastern Indonesia. Journal of Asian Earth Sciences, 18(6), 781–808. https://doi.org/10.1016/S1367-9120(00)00040-7.

Howard, A. D. (1967). Drainage analysis in geologic interpretation: a summation. AAPG Bulletin, 51(11), 2246-2259.

Isbram, M. R., Rudyawan, A., & Patria, A. (2025). The uplift rate of Sulawesi East Arm and the activity of Batui Fault using a tectonic geomorphology approach in the Luwuk Area. Journal of Tectonics and Structural Geology, 12(1), 45-60.

Kadarusman, A., Miyashita, S., Maruyama, S., Parkinson, C. D., & Ishikawa, A. (2004). Petrology, geochemistry and paleogeographic reconstruction of the East Sulawesi Ophiolite, Indonesia. Tectonophysics, 392(1-4), 55-83.

Jaya, R. I. M. C., Masri, Juarsan, L. I., Haraty, S. R., Pramadana, R., & Hasria. (2024). Paragenesis Serpentin pada Batuan Ultramafik Kompleks Ofiolit Daerah Baula - Pomalaa, Sulawesi Tenggara. Jurnal Geologi dan Sumberdaya Mineral, 25(2), 95-106. http://dx.doi.org/10.33332/jgsm.geologi.v25i2.761Maulana, A. (2015). Characteristic and origin of rodingite from ultramafic–mafic complex of East Sulawesi Ophiolite. Indonesian Journal on Geoscience, 2(3), 145–155.

Maulana, A., Imai, A., van Leeuwen, T., Koike, K., Watanabe, K., Yonezu, K., & Boyce, A. J. (2016). Origin and geodynamic setting of Late Cenozoic ultra-potassic magmatism in Central Sulawesi, Indonesia. Journal of Asian Earth Sciences, 124, 102-125. https://doi.org/10.1016/j.jseaes.2016.04.018

Monnier, C., Girardeau, J., Maury, R. C., & Cotten, J. (1995). Back-arc basin origin for the Helmahera Ophiolite (Eastern Indonesia). Geology, 23(9), 851-854.

Parkinson, C. (1998). Emplacement of the East Sulawesi Ophiolite: evidence from associated structural and metamorphic rocks. Geological Society, London, Special Publications, 129(1), 121-136.

Peacock, S. M. (1993). The importance of blueschist clogite dehydration reactions in subducting oceanic crust. Geological Society of America Bulletin, 105(5), 684–694.

Pusat Studi Gempa Nasional (Pusgen). (2017). Peta Sumber dan Bahaya Gempa Indonesia Tahun 2017. Kementerian Pekerjaan Umum dan Perumahan Rakyat.

Puspita, R., Ninasafitri, & Ente, M. R. (2022). Characteristics of Ultramafik Rock and Nickel Laterite Distribution in Siuna Area, Pagimana, Banggai, Central Sulawesi. Jurnal Geocelebes, 6(1), 93-107. https://doi.org/10.20956/geocelebes.v6i1.18523.

Rudyawan, A., & Hall, R. (2012). Structural assessment of the North Sulawesi offshore and its implication for hydrocarbon potential. Proceedings of Indonesian Petroleum Association, 36th Annual Convention.

Rusmana. (1993). Peta Geologi Lembar Luwuk, Sulawesi, Skala 1:250.000. Pusat Penelitian dan Pengembangan Geologi.

Silver, E. A., McCaffrey, R., Joyodiwiryo, Y., & Stevens, S. (1983). Ophiolite emplacement by collision between the Sula Platform and the Sulawesi island arc, Indonesia. Journal of Geophysical Research: Solid Earth, 88(B11), 9419–9435.

Travis, R. B. (1955). Classification of rocks. Quarterly of the Colorado School of Mines, 50(1), 1-98.

Wakita, K. (2000). Cretaceous accretionary–collision complexes in central Indonesia. Journal of Asian Earth Sciences, 18(6), 739–749.

Zuidam, R. V. (1985). Aerial photo-interpretation in terrain analysis and geomorphologic mapping. Smits Publishers.

DOI: https://doi.org/10.37905/jrpi.v3i2.38576

Refbacks

There are currently no refbacks.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Editorial Office of Jurnal Riset dan Pengabdian Interdisipliner:

Department of Earth Science and Technology, Universitas Negeri Gorontalo

Jl. Prof. Dr. Ing. B. J. Habibie, Moutong, Tilongkabila, Kabupaten Bone Bolango 96119, Gorontalo, Indonesia.

Tel. 085839510899, 082194349519 (Call/SMS/WA)

E-mail: [email protected]

Jurnal Riset dan Pengabdian Interdisipliner (E-ISSN: 3064-6111) is licensed under a Creative Commons Attribution 4.0 International License.

Username
Password
Remember me