Interpretasi Sistem Panas Bumi Suwawa Berdasarkan Sudut Pandang Tektonik Dan Anomali Gravitasi
DOI:
https://doi.org/10.29303/goescienceed.v7i1.1719Keywords:
geothermalgravity, tectonics, seismic tomography, satelliteAbstract
The Suwawa geothermal prospect is one of the areas officially designated as a Geothermal Working Area (WKP) in Gorontalo Province, Indonesia. Despite its WKP status, the Suwawa geothermal prospect has not been comprehensively studied from a regional perspective. Previous studies have not conclusively explained the geothermal heat source and the controlling tectonic framework within the Suwawa WKP. Understanding the heat source and tectonic conditions is essential for the effective development of a geothermal working area. This paper applies seismic tomography and satellite gravity methods to elucidate the characteristics of the geothermal system in the Suwawa WKP. Seismic tomography is employed to interpret large-scale tectonic correlations, while satellite gravity data are utilized to assist in identifying potential geothermal heat sources. The seismic tomography results indicate that the tectonic setting influencing the Suwawa WKP is associated with an extensional zone in Teluk Gorontalo. Meanwhile, satellite gravity anomalies suggest that the geothermal heat source in the Suwawa WKP is likely related to a basin structure. These findings imply that the geothermal system in the Suwawa WKP is associated with lithospheric thinning processes.
References
Aki, K., Christoffersson A., & Husebye, E.S. (1977). Determination of Three-Dimensional Seismic Structure of Lithosphere. Journal of Geophysical Research, 82(2), 277–317.
Allen, P. A., & Allen, J. R. (2005). Basin Analysis Principles and Applications Second Edition. History in Blackwell Science (Vol. 2). Blackwell Publishing.
Apandi, T. & Bachri, S. (1997). Peta Geologi Lembar Kotamobagu, skala 1 : 250.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.
Bachri, S., Sukido, & Ratman, N. (1993). Peta Geologi Lembar Tilamuta, Sulawesi, skala 1: 250.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.
Budiati, M. R., Toyokuni, G., Okada, T., & Matsuzawa, T. (2019). Crustal Thickness Beneath Central Indonesia by The Cross-correlation Analysis of Seismic Ambient Noise. Japan Geoscience Union Meeting 2019, 2, 2019.
Direktorat Panas Bumi. (2017). Buku Potensi Panas Bumi Indonesia Jilid 2. Jakarta: Direktorat Jenderal Energi Baru, Terbarukan dan Konservasi Energi, Direktorat Panas Bumi.
Hall, R., & Wilson, M. E. J. (2000). Neogene sutures in eastern Indonesia. Journal of Asian Earth Sciences, 18, 781–808.
Hall, R., & Spakman, W. (2015). Mantle structure and tectonic history of SE Asia. Tectonophysics, 658, 14–45.
Moeck, I. S. (2014). Catalog of Geothermal Play Types Based on Geologic Controls. Renewable and Sustainable Energy Reviews, 37, 867–882.
Nerem R.S., Klosko, S.M., & Pavlis, N.K. (1996). Applications of Global Gravity Field Models in Geodesy and Oceanography. International Association of Geodesy Symposia, vol 116. Springer, Berlin, Heidelberg.
Nyakundi, E. R., Githiri, J. G., & Ambusso, W. J. (2017). Geophysical Investigation of Geothermal Potential of the Gilgil Area, Nakuru County, Kenya Using Gravity. Journal of Geology and Geophysics, 6, 2.
Raharjo, I.B. (2012). Geophysical Signatures of Volcano-Hosted Geothermal Systems, [Ph.D. Thesis], The University of Utah. Retrieved from https://files01.core.ac.uk/download/pdf/276265165.pdf
Rawlinson, N. (2008). Fast Marching Tomography Package:Instruction Manual. Research School of Earth Sciences. Australian National University.
Reid, A. B., & Thurston, J. B. (2014). The Structural Index in Gravity and Magnetic Interpretation: Errors, Uses, and Abuses. Geophysics, 79. 61-J66.
Rezky, Y., Hasan, A. R., & Dirasutisna, S. (2005). Penyelidikan Geologi Daerah Panas Bumi Suwawa Kabupaten Bone Bolango – Gorontalo. Pemaparan Hasil Kegiatan Lapangan Subdit Panas Bumi 2005, 1–12.
Rizkiani, D. N., & Rustadi. (2019). Interpretasi Sistem Panas Bumi Suwawa Berdasarkan Data Gaya Berat. Jurnal Geofisika Eksplorasi, 5(2).
Siebert, L., Simkin, T.S., & Kimberly, P. (2010). Volcanoes of the World: Third Edition (3rd ed.). Oakland: University of California Press.
Smith W. H. F., & Sandwell, D. T. (1997). Global Seafloor Topography from Satellite Altimetry And Ship Depth Soundings. Science. Volume: 277. 1957-1962.
Smith, W. H., & Sandwell, D. T. (2004). Conventional bathymetry, bathymetry from space, and geodetic altimetry. Oceanography, 17 (1). 8-23.
Sukamto, R. (1975). The Structure of Sulawesi In the Light of Plate Tectonics. Regional Conference on Geology and Mineral Resources of Southeast Asia, Association of Indonesian Geologist. Jakarta.
Suryanto, S., Sastranegara, R.M.T., Untoro, A.R., Affif, N.N., Effendi, R., Raharjo, I.B. & Suryantini. (2021). "Integrated Geoscience Data to Identify Heat Source Beneath Umeh Volcanic Complex in Tompaso Geothermal Field". IOP Conference Series: Earth and Environmental Science, Volume 732, ITB International Geothermal Workshop 10-13 August 2020, Bandung, Indonesia
