Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures
MT data obtained at an alluvial valley in Argentina showed a strong telluric current channeling along its axis. This effect was reflected in the MT curves as a very low response for the TM apparent resistivity for periods longer than 1 s. The cause of this channeling remained unsolved although the e...
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todo:paper_09269851_v52_n2-3_p123_Chao2023-10-03T15:46:49Z Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures Chao, G. Osella, A. 2D forward modeling 2D inversion Current channeling Magnetotelluric Codes (symbols) Computer simulation Data reduction Structural analysis Telluric prospecting Current channeling Geophysics electrical resistivity magnetotelluric method numerical model sedimentary basin Antinaco-Los Colorados Valley Argentina La Rioja Province MT data obtained at an alluvial valley in Argentina showed a strong telluric current channeling along its axis. This effect was reflected in the MT curves as a very low response for the TM apparent resistivity for periods longer than 1 s. The cause of this channeling remained unsolved although the existence of shallow conductive structures may be related to this effect. The purpose of this work is to analyze in detail the magnetotelluric response of this kind of structures. The main objectives are to identify the relevant geometrical and electrical features that cause the anomalous TM response and to study the sensitivity of the MT modes to characterize this kind of structures. Starting from a previous 2D TE inversion, we modified the structure in order to reproduce the behavior of the MT curves. 2D and 3D forward modeling of different shallow conductive structures were carried out and synthetic data from related structures were inverted using the 2D RRI code. © 2002 Elsevier Science B.V. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09269851_v52_n2-3_p123_Chao |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
2D forward modeling 2D inversion Current channeling Magnetotelluric Codes (symbols) Computer simulation Data reduction Structural analysis Telluric prospecting Current channeling Geophysics electrical resistivity magnetotelluric method numerical model sedimentary basin Antinaco-Los Colorados Valley Argentina La Rioja Province |
| spellingShingle |
2D forward modeling 2D inversion Current channeling Magnetotelluric Codes (symbols) Computer simulation Data reduction Structural analysis Telluric prospecting Current channeling Geophysics electrical resistivity magnetotelluric method numerical model sedimentary basin Antinaco-Los Colorados Valley Argentina La Rioja Province Chao, G. Osella, A. Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| topic_facet |
2D forward modeling 2D inversion Current channeling Magnetotelluric Codes (symbols) Computer simulation Data reduction Structural analysis Telluric prospecting Current channeling Geophysics electrical resistivity magnetotelluric method numerical model sedimentary basin Antinaco-Los Colorados Valley Argentina La Rioja Province |
| description |
MT data obtained at an alluvial valley in Argentina showed a strong telluric current channeling along its axis. This effect was reflected in the MT curves as a very low response for the TM apparent resistivity for periods longer than 1 s. The cause of this channeling remained unsolved although the existence of shallow conductive structures may be related to this effect. The purpose of this work is to analyze in detail the magnetotelluric response of this kind of structures. The main objectives are to identify the relevant geometrical and electrical features that cause the anomalous TM response and to study the sensitivity of the MT modes to characterize this kind of structures. Starting from a previous 2D TE inversion, we modified the structure in order to reproduce the behavior of the MT curves. 2D and 3D forward modeling of different shallow conductive structures were carried out and synthetic data from related structures were inverted using the 2D RRI code. © 2002 Elsevier Science B.V. All rights reserved. |
| format |
JOUR |
| author |
Chao, G. Osella, A. |
| author_facet |
Chao, G. Osella, A. |
| author_sort |
Chao, G. |
| title |
Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| title_short |
Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| title_full |
Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| title_fullStr |
Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| title_full_unstemmed |
Numerical simulations of the current channeling effect on MT responses due to shallow conductive structures |
| title_sort |
numerical simulations of the current channeling effect on mt responses due to shallow conductive structures |
| url |
http://hdl.handle.net/20.500.12110/paper_09269851_v52_n2-3_p123_Chao |
| work_keys_str_mv |
AT chaog numericalsimulationsofthecurrentchannelingeffectonmtresponsesduetoshallowconductivestructures AT osellaa numericalsimulationsofthecurrentchannelingeffectonmtresponsesduetoshallowconductivestructures |
| _version_ |
1807315405881999360 |