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Magnetotelluric (MT) data analysis and 2D modeling of the Kutai Basin, Indonesia: Preliminary results
Irawati S.M.a, Hidayatb, Grandis H.a
a Geophysical Engineering, Institut Teknologi Bandung, Indonesia
b Geological Survey Center, Ministry of Energy and MineralResources, 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 EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering.All right reserved.Magnetotellurics (MT) is a passive electromagnetic method that measures fluctuations of electric and magnetic fields at the earth’s surface. In this study, MT method is applied for basin delineation based on the resistivity contrast between sediments and basement. Thirty MT stations were deployed at eastern part of the Kutai basin, East Kalimantan, Indonesia. We analyzed the MT data using phase tensor analysis, to obtain the dimensionality and the geoelectrical strike of the subsurface. Most of the MT data are characterized by phase ellipse and low skew value (-3o < β < 3o). This indicates that MT data have 2D character with the direction of geoelectrical strike N 30o E. This result is in a good agreement with the geological strike that of NE-SW direction. We performed 2D modeling at two lines to obtain the resistivity configuration of the Kutai basin. The low resistivity anomalies may be associated with shale or black shale of the Pamaluan Formation showing geometries influenced by Samarinda anticlinorium and its fault structures.[/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]Black shales,Earth's surface,Electric and magnetic fields,Electromagnetic methods,Fault structure,Geoelectrical,Low resistivity,Tensor analysis[/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][/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]Indonesia Endowment Fund for Education (LPDP), Ministry of Finance, Indonesia provides funding for the first author's study, while MT data were provided by Geological Survey Center, Ministry of Energy and Mineral Resources, Indonesia. The authors benefit fruitful discussion with Dr. Sintia Windhi Niasari from UGM.[/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/10.3997/2214-4609.201900406[/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]