DOI: 10.5937/jaes0-38014
This is an open access article distributed under the CC BY 4.0
Volume 21 article 1050 pages: 59-69
Seulawah Agam is one of the volcanic areas in Aceh province, Indonesia, which planned for a powerplant constriction with an energy capacity expected to be approximately 230 MWe. This volcano has seven manifestations in the form of craters, hot water, and heated soil. The hydrothermal system in this volcano is controlled by a fault system which acts as a medium for the entry and exit of fluids. Therefore, understanding the local geology is required for geothermal power plant development, especially for the determination area for injection and production wells. In this research, we use the Very Low-Frequency Electromagnetic (VLF-EM) methods combined with electrical resistivity tomography data on the Ie Jue manifestation area to determine the shallow structure related to the manifestation. The VLF was made for 4 profiles with 700 m length for each VLF-EM profile and 300 m for electrical resistivity lines. We utilized the Karous Hjelt filter for qualitative interpretation, while Occam's algorithm was applied for 2D inversion of data for quantitative analysis of VLF-EM data. Based on the current density model, several vertical conductive anomalies can be well demonstrated at a distance of 300-400 m from the four VLF profiles. The conductive anomaly can also be seen in the resistivity data from the electrical resistivity. The results of the Occam model show that the depth of faults and fractures is seen at 30 m depth with low resistivity (below 100 Ωm). This anomaly is generally associated with outcrops in the field, such as fumarole and warm ground on the east side of the manifestation area. In addition, the 2D inversion model of VLF also shows the contrast of several fracture zones as a place for fluid to enter and exit the Seulawah volcano. Therefore, based on our result, it can be summed up that this method is effectively applied to geothermal in high terrain areas such as in Indonesia and can be used to suggest safe locations for injection wells and production of geothermal drilling.
The authors acknowledge and appreciate the contributions of the Geophysical Engineering students for assisting the acquisition of VLF-EM and electrical resistivity data in Ie Jue. The research is fully funded by Calon Professor 2022 research grant from Universitas Syiah Kuala with a No: 068/UN l1.2.1/PT.0l.03/PNBP/2022. The authors also thanks to Fernando A Monteiro Santos for providing the codes of PrepVLF and Inv2DVLF.
1. Hochstein, M. P., Sudarman, S. (2008). History of geothermal exploration in Indonesia from 1970 to 2000. Geothermics, vol. 37, no. 3, 220–266, DOI: 10.1016/j.geothermics.2008.01.001
2. Yanis, M., Ismail, N., Abdullah, F.(2022). Shallow Structure Fault and Fracture Mapping in Jaboi Volcano, Indonesia, Using VLF–EM and Electrical Resistivity Methods. Natural Resources Research, vol. 31, no. 1, 335– 352, DOI: 10.1007/s11053-021-09966-7.
3. Yanis, M., Novari, I., Zaini, N., Marwan., Pembonan, A.Y., Nizamuddin. (2020). OLI and TIRS Sensor Platforms for Detection the Geothermal Prospecting in Peut Sagoe Volcano, Aceh Province, Indonesia. International Conference on Electrical Engineering and Informatics (ICELTICs), p. 1-6.
4. Marwan., Yanis, M., Idroes, R., Ismail. (2019). 2D inversion and static shift of MT and TEM data for imaging the geothermal resources of Seulawah Agam Volcano, Indonesia. International Journal of GEOMATE, vol. 17, no. 62, 173-180, DOI: 1021660/2019.62.11724.
5. Zaini, N., Yanis, m., Marwan., Isa, M., Van Der Meer, F. (2021). Assessing Of Land Surface Temperature At The Seulawah Agam Volcano Area Using The Landsat Series Imagery. Journal of Physics: Conference Series, P.0122021.
6. Marwan., Yanis, M., Nugraha, G.S., Zainal, M., Arahman, N., Idroes, R., Dharma, D.B., Saputra, D., Gunawan, P. (2021). Mapping of Fault and Hydrothermal System beneath the Seulawah Volcano Inferred from a Magnetotellurics Structure. Energies, vol. 14, no. 19, 6091, DOI: 10.3390/en14196091.
7. Marwan., Yanis, M., Zainal, M., Nugraha, G.S. (2020). Application Of QR Codes As A New Communication Technology And Interactive Tourist Guide In Jaboi, Sabang. IOP Conference Series: Materials Science and Engineering, p. 012025.
8. Idroes, R., Yusuf, M., Saiful., Alatas, M., Subhan., Lala, A., Muslem., Suhendra, R., Idroes, G.M., Marwan., Mahlia, T.M.I. (2019). Geochemistry Exploration and Geothermometry Application in the North Zone of Seulawah Agam, Aceh Besar District, Indonesia. Energies, vol. 12, no. 23, 4442, DOI: 10.3390/en12234442.
9. Zhang, L., Jiang, P., Wang, Z., Xu, R. (2017). Convective heat transfer of supercritical CO2 in a rock fracture for enhanced geothermal systems. Applied Thermal Engineering, vol. 115, 923–936, DOI: 10.1016/j.applthermaleng.2017.01.013.
10. Ebrahimi, A., Sundararajan, N., Babu, V.R. (2019). A Comparative Study For The Source Depth Estimation Of Very Low Frequency Electromagnetic (VLF-EM) Signals. Journal of Applied Geophysics, vol.162, 174-183, DOI: 10.1016/j.jappgeo.2019.01.007.
11. Drahor, M. G., Berge, M. A. (2006). Geophysical investigations of the Seferihisar geothermal area, Western Anatolia, Turkey. Geothermics, vol. 35, no. 3,302–320, DOI: 10.1016/j.geothermics.2006.04.001.
12. Özürlan, G., Sahin, M.H. (2006). Integrated Geophysical Investigations In The Hisar Geothermal Field, Demirci, Western Turkey. Geothermics, vol. 35, no. 2, 110–122, DOI: 10.1016/J.GEOTHERMICS.2005.11.004.
13. Lin, M.J., Jeng, Y. (2010). Application Of The VLF-EM Method With EEMD To The Study Of A Mud Volcano In Southern Taiwan. Geomorphology, vol. 119, no. 1–2, 97–110, DOI : 10.1016/J.GEOMORPH.2010.02.021.
14. Niculescu, B.M., Andrei, G. (2019). Using Vertical Electrical Soundings To Characterize Seawater Intrusions In The Southern Area Of Romanian Black Sea Coastline. Acta Geophysica, vol. 67, no. 6, 1845–1863, DOI: 10.1007/s11600-019-00341-y.
15. Chabaane, A., Redhaounia, B., Gabtni, H. (2017). Combined Application of Vertical Electrical Sounding And 2D Electrical Resistivity Imaging For Geothermal Groundwater Characterization: Hammam Sayala Hot Spring Case Study (NW Tunisia). Journal of African Earth Sciences, vol. 134, 292–298, DOI: 10.1016/j.jafrearsci.2017.07.003.
16. Marwan., Idroes,R., Yanis, M., Idroes, G.M., Syahriza. (2021). A Low-Cost UAV Based Application For Identify and Mapping a Geothermal Feature in Ie Jue Manifestation, Seulawah Volcano, Indonesia. International Journal of GEOMATE, vol. 20, no. 80, 135–142, DOI: 10.21660/2021.80.j2044.
17. Yanis, M., Abdullah, F., Zaini, N., Ismail, N. (2021). The Northernmost Part Of The Great Sumatran Fault Map And Images Derived From Gravity Anomaly. Acta Geophysica, vol. 69, no. 3, 795–807, DOI: 10.1007/s11600-021-00567-9.
18. Yanis, M., Abdullah, F., Yenny A., Zainal, M., Abubakar M., Ismail, N. (2020). Continuity of Great Sumatran Fault in the Marine Area revealed by 3D Inversion of Gravity Data. Jurnal Teknologi, vol. 83, no. 1, 145–155, DOI: 10.11113/jurnalteknologi.v83.14824.
19. Sieh, K., Natawidjaja, D. (2000). Neotectonics Of The Sumatran Fault, Indonesia. Journal of Geophysical Research: Solid Earth, vol. 105, no. B12, 28295–28326, DOI : 10.1029/2000JB900120.
20. Rizal, M., Ismail, N., Yanis, M., Zainal, M., Surbakti, M.S. The 2d Resistivity Modelling On North Sumatran Fault Structure By Using Magnetotelluric Data. Iop Conference Series: Earth And Environmental Science, p. 012036.
21. Ismail, N., Yanis, M., Idris, S., Abdullah, F., Hanafiah, B. (2017). Near-Surface Fault Structuresof the Seulimuem Segment Based on Electrical Resistivity Model. Journal of Physics: Conference Series, p. 012016.
22. Bennett, M.R., Doyle P. (Geology On Your Doorstep). Geology Society, p. 270.
23. Yanis, M., Marwan., Paembonan, A.Y., Yudhyantoro, Y., Rusydy., Idris, S., Asrillah. (2022). Geophysical and Geotechnical Approaches in Developing Subsurface Model for Gas Power Plant Foundation. Indian Geotechnical Journal, vol.52, 237-247, DOI: 10.1007/s40098-021-00559-y.
24. Yanis, M., Bakar, M.A., Ismail, N. (2017). The Use of VLF-EM and Electromagnetic Induction Methods for Mapping the Ancient Fort of Kuta Lubok as Tsunami Heritage i. 23rd European Meeting of Environmental and Engineering Geophysics, p. 1-5.
25. Karous, M., Hjelt, S.E. (1983). Linear Filtering of VLF Dip-Angle Measurements. Geophysical Prospecting, vol. 31, no. 5, 782–794, DOI: 10.1111/j.1365- 2478.1983.tb01085.x.
26. Yanis, M., Zainal, M., Marwan, Ismail, N. (2019). Delineation of Buried Paleochannel Using EM Induction in Eastern Banda Aceh, Indonesia. 81st EAGE Conference and Exhibition 2019, p. 1-5.
27. Majumdar, R.K. Majumdar, N., Mukherjee, A.L. (2000). Geoelectric investigations in Bakreswar geothermal area, West Bengal, India. Journal of Applied Geophysics, vol. 45, 187-202, DOI : 10.1016/S0926-9851(00)00028-8.
28. Sungkono., Husein, A., Prasetyo, H., Bahri, A.S., Santos, F.A.M., Santosa, B.J. (2014). The VLF-EM Imaging Of Potential Collapse On The LUSI Embankment. Journal of Applied Geophysics, vol. 109, 218–232, DOI: 10.1016/j.jappgeo.2014.08.004.
29. Idris, S., Syukri, M., Surbakti, M.S., Marwan., Muchlis., Rusydy, I., Aflah, N. (2018). Analysis Of Shallow Subsurface Structure At Geothermal Area Of Ie Jue Using Resistivity Method. Jurnal Natural, vol. 18, no.1, 18-21, DOI: 10.24815/JN.V18I1.9676.
30. Ismail, N., Nadra, U., Yanis, M. (2021). Understanding Volcano Activity Using 2D Simulation Models of MT Data. The 2nd SEA-STEM International Conference, p. 129–132.
31. Santos, F.A.M, Mateus, A., Figureas, J., Golcanves, M.A. (2006). Mapping Groundwater Contamination Around A Landfill Facility Using The Vlf-Em Method - A Case Study. Journal of Applied Geophysics, vol. 60, no.2, 115-125, DOI: 10.1016/j.jappgeo.2006.01.002
32. Nasruddin, M., Alhamid, I.Y., Surachman, A.A., Sugiyono, Aditya, H.B., Mahlia, T.M.I. (2016). Potential of geothermal energy for electricity generation in Indonesia: A review. Renewable and Sustainable Energy Reviews, p. 733-740.
33. Singarimbun, A., Gaffar, E.Z., Tofani, P. (2017). Modeling Of Reservoir Structure By Using Magnetotelluric Method In The Area Of Mt. Argopuro, East Java, Indonesia. Journal of Engineering and Technological Sciences, vol. 49, no. 6, 833–847, DOI: 10.5614/j.eng.technol.sci.2017.49.6.9.
34. Vargemezis, G., 3D Geoelectrical Model Of Geothermal Spring Mechanism Derived From VLF Measurements: A Case Study From Aggistro (Northern Greece). 2014. Geothermics, vol. 51, 1–8, DOI: 10.1016/j.geothermics.2013.09.001.
35. Sharma, S.P., Baranwal, V.C. (2005). Baranwal,“Delineation Of Groundwater-Bearing Fracture Zones In A Hard Rock Area Integrating Very Low Frequency Electromagnetic And Resistivity Data. Journal of Applied Geophysics, vol. 57, no.2, 155-156, DOI: 10.1016/j.jappgeo.2004.10.003.
36. Marwan, Asrillah, Yanis, M., Furumoto, Y. (2019). Lithological Identification Of Devastated Area By Pidie Jaya Earthquake Through Poisson’s Ratio Analysis. International Journal of GEOMATE, vol. 17, no. 63, 210–216, DOI: 10.21660/2019.63.77489.