DELINEATION OF RESISTIVITY VALUE IN GEOTHERMAL TAMBANG SAWAH USING MAGNETOTELLURIC METHOD

  • Andre Rahmat Al Ansory Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Hana Raihana Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Vinki Loverly Pritama Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Welly Saputri Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Faritz Bagda Maghribi Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Muchammad Farid Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Arif Ismul Hadi Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Halauddin Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Budi Harlianto Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
  • Nanang Sugianto Program Studi Geofisika, Jurusan Fisika, Universitas Bengkulu
Keywords: Geothermal, Magnetotelluric, resistivity, reservoir, caprock, hot rock, Tambang Sawah

Abstract

The subsurface structure of the geothermal field in Desa Tambang Sawah has been mapped. This research aims to delineate the resistivity values in the area of Tambang Sawah Village, Lebong Regency, Bengkulu Province based on magnetotelluric measurements which can later identify low, medium, and high resistivity values to interpret geothermal in the research area.  The magnetotelluric (MT) method with electrical and magnetic sensors is used to collect data in the field. There are two electrical sensors in horizontal direction (Ex, Ey) and three magnetic sensors in horizontal direction. (Hx, Hy) and vertical (Hz).  The results obtained from this study are that resistivity values of 20-50 ohm.m are considered as reservoirs, while resistivity of 0.26-0.8 ohm.m is considered as caprock, and resistivity greater than 300 ohm.m is considered as hot rock.

Downloads

Download data is not yet available.

References

Andini, D., Lepong, P., Natalisanto, A.I., 2020. Identifikasi Kawasan Zona Panas Bumi (Geothermal) Di Daerah X Menggunakan Metode Magnetotellurik. J. Geosains Kutai Basin 3, 1–8.

Arief, R., Sukandar, M., Putra, C., 2018. Penelitian geologi medis daerah Lebong Tambang Kabupaten Lebong, Provinsi Bengkulu. Bid. Miner. 1–32.

Bemmelen, R.W.V.A.N., 1969. THE ALPINE LOOP OF THE TETHYS ZONE. tectonophysiscs 8, 107–113.

Fitrida, S.M., Sampurno, J., Ivansyah, O., Kholid, M., 2015. Identifikasi Struktur Bawah Permukaan Bebrdasarkan Metode Magnetotelirik di Kawasan Panas Bumi Wapsalit Kabupaten Buru Provinsi Maluku. POSITRON V.

Gafoer, s., T.C. Amin., & R.P., 2007. Peta geologi lembar Bengkulu, Sumatera [Peta] = Geological map of the Bengkulu quadrangle, Sumatera / oleh S. Gafoer, T.C. Amin dan R. Pardede. Bandung : Pusat Penelitian dan Pengembangan Geologi, 2007.

Hana Raihana, Jesika Erni Elfrita Sinaga, Adinda Gusti Cahyani, Halauddin, Suhendra, Anggiat Hutauruk, N.S., 2023. Identification of Alteration Zones Based on Resistivity and Induced Polarization Geoelectric Survey. Jambura Geosci. Rev. 5, 119–126. https://doi.org/10.34312/jgeosrev.v5i2.17931

Hendra, G., 2013. Metoda Magnetotellurik 1–17.

Iqbal, M., Wachisbu, M., 2015. Pemodelan Data Magnetotelurik Dengan Remote Reference Untuk Eksplorasi Cekungan Migas Studi Kasus : Lapangan Em-4 Dosen Pembimbing Remote Reference For Oil And Gas Basin Exploration Case Study : Em-4 Field.

Iskandar, Z., 2008. Petrogenesis batuan vulkanik daerah tambang emas Lebong Tandai , Provinsi Bengkulu , berdasarkan karakter geokimianya. Indones. J. Geosci. 3, 57–73.

Kasbani, 2009. TIPE SISTEM PANAS BUMI DI INDONESIA DAN ESTIMASI POTENSI ENERGINYA. PMG – Badan Geol.

Mukazairo, D.S.E., Refrizon, R., Sugianto, N., 2020. Peta Anomali Magnetik Daerah Mineralisasi Emas Di Desa Tambang Sawah Kecamatan Lebong Utara Berdasarkan Pengukuran Magnetik. Newton-Maxwell J. Phys. 1, 19–24. https://doi.org/10.33369/nmj.v1i1.14292

Putra, ilham dharmawan, Nasution, reza ade firdaus, Harijoko, A., 2017. Aplikasi Landsat 8 Oli/Tirs Dalam Mengidentifikasi Altrasi Hidrotermal Skala Regional : Studi Kasus Daerah Rejang Lebong dan Sekitarnya, Provinsi Bengkulu. kebumian 2, 56–63.

Ramdhani, F., Setiawan, A., Raharjo, imam b., A, L., 2017. Pemodelan 2 dimensi data magnetotellurik berdasarkan analisis phase tensor dalam penentuan geoelectrical strike dan dimensionalitas data di Lapangan Panas Bumi “ X .” youngster Phys. jaournal 6, 205–212.

Rosenkjær, G.K., 2011. Electromagnetic methods in geothermal exploration. 1D and 3D inversion of TEM and MT data from a synthetic geothermal area and the Hengill geothermal area, SW Iceland. Faculty of Earth Sciences School of Engineering and Natural Sciences University of Iceland.

Salam, R.A., Harmoko, U., 2017. Pemodelan 2D Sistem Pana Bumi Daerah Garut Bagian Timur Menggunakan Metode Magnetotelurik. Youngster Phys. J. 6, 143–150.

Sri, Setiawan, I., Fiqih, F.M., Fauzi, A.I., 2009. Batuan volkanik.

Sugianto, A., A.W, A.K., 2012. Survei Magnetotellurik Daerah Pana Bumi Kepahiang Kabupaten Kepahiang, Bengkulu [WWW Document]. Pus. Sumber Daya Geol.

Suparno, S., 2009. Energi Panas Bumi. A present from the heart of the earth. Univ. Indones. Depok 13–26.

Taufiquddin, 2014. Identifikasi Struktur Bawah Permukaan Daerah Panas Bumi Dengan Metode Gravity (Studi Kasus di Daerah Sumber Air Panas Desa Lombang Kecamatan Batang-Batang Kabupaten Sumenep).

Wulandari, J.C., Gaffar, E.Z., Zulaikah, S., P, N.A., 2017. Penentuan Struktur Litologi Daerah Panasbumi Probolinggo Menggunakan Metode Magnetotelurik (MT).

Published
2023-11-29
Section
Buletin Sumber Daya Geologi