Identification of subsurface structures in the geothermal manifestation area of mountain pusuk buhit samosir district, north Sumatra province using gravity method

Sihombing, Sakkiel; Dewi, Ira Kusuma; Adi Martha, Agustya

doi:10.30499/ijg.2024.447355.1582

Identification of subsurface structures in the geothermal manifestation area of mountain pusuk buhit samosir district, north Sumatra province using gravity method

مقالات آماده انتشار

نوع مقاله : مقاله پژوهشی‌

نویسندگان

Sakkiel Sihombing ¹

ira kusuma dewi ²

agustya adi martha ³

¹ Jurusan Teknik Geofisika, Fakultas sains dan teknologi, universitas Jambi, Jambi, Indonesia

² Department of Geophysucal Engineering, Faculty of Science and technology, Jambi University, Jambi, Indonesia

³ Research and Innovation National Agency

10.30499/ijg.2024.447355.1582

چکیده

Mount Pusuk Buhit is an active volcano around Lake Toba which has a height of 1980 meters above sea level. On Mount Pusuk Buhit there are geothermal manifestations in the form of hot water flows and fumaroles. What was carried out in this research was the identification of subsurface structures in geothermal manifestation areas using the GGMPlus satellite image gravity method. Based on the Sidikalang geological map sheet, in this study there are 5 types of rock formations, namely the Pusuk Buhit Formation (Qvpb), Kluet Formation (Puk), Kualu Formation (Mtks), Alluvium Formation (Qh) and Toba Tufa Formation (Qvt). Bouger anomaly values in this study ranged from -7.8 mGal to 6.0 mGal, low anomalies ranged from -7.8 mGal to -1.4 mGal. Moderate anomalies range from -1.0 mGal to 0.4 mGal. Meanwhile, the anomaly height in this study area ranges from 0.9 mGal to 6.0 mGal. The geothermal manifestation area on Mount Pusuk Buhit is located at a low anomaly. The depth of the residue map in this study is 520 meters while the regional depth is 1992 meters. From the results of this research, 22 faults were identified, namely 14 normal faults and 8 areverse faults. At this research location, the slicing results pass through 2 faults that are visible or detected on the surface based on the geological map of the research area. Slicing A passes through 1 fault while slicing B passes through 2 faults.

کلیدواژه‌ها

Gravity Method

Satellite Imagery

Geothermal

Geological Structure

موضوعات