Abstract
Geothermal is associated with volcanic that still has heat energy below the surface. Indonesia is a country with geothermal energy reserves of around 40%. There are 256 potential geothermal areas and only 7 locations have been utilized. Gorontalo has several geothermal manifestations, such as Lombongo, Pangi, Libungo, and Hungayono. The purpose of this study was to study the geology of the geothermal manifestations of Pangi, East Suwawa District, Bone Bolango Regency, Gorontalo Province. The research method is divided into field observations, laboratory analysis, and studio analysis. The results of this research show that the geomorphology in the study area is divided into 3 units, namely the Fluvial Plain, the Volcanic Hills, and the Structural Use Landscape. Alluvial Deposition Unit, Volcanic Breccia Unit, Tuff Lapili Unit, Andesite Unit, Granodiorite Unit, and Porphyry Diorite Unit.
Highlights
Geothermal is associated with volcanic that still has heat energy below the surface
Berdasarkan analisis petrografi, mineral-mineral yang terdapat pada sayatan batuan Andesit (Gambar 6.a) adalah mineral Plagioklas (70%), Biotit (7%), Kuarsa (10%), K-Feldspar (10%), dan Mineral Opak (3%)
Mineral-mineral yang terdapat pada sayatan batuan Granodiorit (Gambar 6.b) adalah mineral Plagioklas (65%), Biotit (10%), Kuarsa (5%), Hornblende (10%), Piroksen (8%) dan Mineral Opak (2%)
Summary
Geothermal is associated with volcanic that still has heat energy below the surface. Indonesia is a country with geothermal energy reserves of around 40%. Berdasarkan data Badan Geologi (2009), terdapat 256 daerah potensi geothermal dan hanya 7 lokasi (2,64%) yang telah dimanfaatkan. Adanya aktivitas magmatisme ini menyebabkan Gorontalo memiliki beberapa titik manifestasi geothermal yang berada di Kabupaten Bone Bolango yakni Lombongo, Pangi, Pancuran, dan Hungayono (Badan Geologi, 2009). Tujuan dari penelitian ini ialah untuk mengetahui geologi daerah geothermal Pangi Kecamatan Suwawa Timur Kabupeten Bone Bolango Provinsi Gorontalo.
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