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Magnetotelluric investigation for imaging the subsurface geoelectrical feature of the prospective Sembalun-Propok geothermal zone, Indonesia
Febriani F.a, Widarto D.S.b, Gaffar E.Z.a, Nasution A.c, Grandis H.c, Anggono T.a, Syuhada S.a
a Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan, 15314, Indonesia
b Research & Technology Center, PT Pertamina (Persero), Jakarta, 10110, Indonesia
c Faculty of Earth Sciences and Technology, Bandung Institute of Technology, Bandung, 40132, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019, Saudi Society for Geosciences.This paper discussed the investigation of the Sembalun-Propok geothermal system, West Nusa Tenggara Province, Indonesia. We analyzed the magnetotelluric data and its implication to the subsurface structure related to the system of Sembalun-Propok geothermal reservoir. In this study, information on the dimensionality of regional conductivity structure and its regional strike were analyzed by applying the magnetotelluric phase tensor. By using induction arrows analysis, the influences of the sea toward the magnetotelluric data were also observed. The results show that it could be performing the 2-D modeling for the higher frequency (≥ 1 Hz) magnetotelluric data. The 2-D inversion modeling suggests that the potential geothermal zone is situated in the western-southern part of the study area. In addition, it also can reveal the depth of the unaltered layer (ρ ≥ 500 Ωm). It is probably related to the volcanic rocks in the study area, and its depth is about 0–500 m from the surface. Then, underlying the unaltered layer possibly corresponds to the cap rock layer (ρ = 1–10 Ωm) of the system of the geothermal reservoir.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]2-D inversion,Geoelectrical feature,Geothermal prospect,Magnetotelluric data,Phase tensor[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors greatly appreciate Chevy Iskandar of Upstream Technology Center PT Pertamina (Persero), presently at PT Geodipa, for his help in initial processing, as well as rotating the MT data and fruitful discussion during the evaluation of the data quality.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1007/s12517-019-4723-3[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]