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Sahputra, Rio
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ESTIMASI DEFORMASI INTERSEISMIC DI DAERAH PANTAI BENGKULU BAGIAN SELATAN DENGAN MENGGUNAKAN METODE SURVEY GPS GEODETIK Lubis, Ashar Muda; Wahyu, Mia; Sahputra, Rio; Samdara, Rida
Jurnal Geosaintek Vol. 7 No. 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Telah dilakukan pengamatan deformasi pada kawasan pesisir pantai dalam siklus interseismic dengan menggunakan Global Positioning System (GPS) pada lima titik pemantauan di wilayah Bengkulu bagian selatan. Pengamatan GPS dilakukan dalam kurun waktu 2019-2020 kecuali untuk stasiun DEYU pada kurun waktu 2014-2016. Pengolatan data GPS dilakukan dengan menggunakan software GAMIT/GLOBK. Hasil pengolahan berupa posisi harian GPS time series dalam komponen utara dan timur yang kemudian dilakukan linear fit untuk mendapatkan vektor pergeseran. Kecepatan pergerakan pada stasiun GPS berada 22,23-27,67 mm/tahun dengan error pengukuran < 2,5 mm/tahun. Dari hasil penelitian ini menunjukkan adanya aktivitas deformasi interseismic di wilayah pesisir Bengkulu bagian selatan dengan arah vektor pergeseran hasil pengamatan menuju ke arah timur laut. Vektor pergerakan interseismic yang teramati masih perlu dikoreksi terhadap rotasi Blok Sunda, sehingga vektor pergerakan interseismic yang diperoleh hanya berasal dari pergerakan zona subduksi Sumatera dan sesar Sumatra yang berguna sebagai input pada pemodelan potensi kegempaan di Sumatra khususnya di daerah Bengkulu.
IDENTIFICATION OF HYDROTHERMAL DISTRIBUTIONS USING THE WENNER-SCHLUMBERGER CONFIGURATION GEOELECTRIC METHOD IN LEMEU VILLAGE, LEBONG REGENCY, BENGKULU Kausari, Alfata; Rafly, Tegar Al; Muammar, Zaky; Refrizon, Refrizon; Halauddin, Halauddin; Suhendra, Suhendra; Sahputra, Rio; Raihana, Hana; Rahmat, Andre
Indonesian Physical Review Vol. 7 No. 3 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i3.332

Abstract

The hot spring pool, Lemeu Village, Lebong Regency, is one of the geothermal fields. This research aims to identify the study area's geothermal potential and lithology. This is illustrated by the correlation method of resistivity and electrical conductivity values of rocks based on geoelectric measurements. This research uses the Wenner-Schlumberger configuration geoelectric method, as many as four tracks spread around the hot spring hill with a length of 480 meters, which are used to see variations in resistivity values that can indicate the presence of hydrothermal potential. The result is a 2D Resistivity model processed with Res2DinvX32 software. Based on the interpretation results, the subsurface rock lithology in each track is relatively similar in color, texture, grain size, and composition because it is around the hill. The Hulusimpang formation consists of clay, silty sand, tuff, andesite, basalt, and granite. Hydrothermal is found on lines 2 and 4 with resistivity values of 7.3 and 10.1 Ωm at a depth of 26 meters. Geothermal potential in the research area is divided into several temperature categories; some have low, medium, and high temperatures. In the research area, tracks 1 and 3 have low temperatures.
Co-Authors Ashar Muda Lubis Halauddin Halauddin Kausari, Alfata Muammar, Zaky Rafly, Tegar Al Rahmat, Andre Raihana, Hana Refrizon Refrizon Rida Samdara Suhendra Suhendra Wahyu, Mia