Depth model building by constrained magnetotelluric inversion
In this paper we describe an approach aimed at integrating seismic and magnetotelluric data in a complex geological setting, characterised by thrust structures, in Southern Apennine, Southern Italy. Seismic data were collected by the «Global Offset» technique that is designed to record hight fold da...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2002-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3501 |
| _version_ | 1818289002388652032 |
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| author | S. Morandi P. Dell'Aversana |
| author_facet | S. Morandi P. Dell'Aversana |
| author_sort | S. Morandi |
| collection | DOAJ |
| description | In this paper we describe an approach aimed at integrating seismic and magnetotelluric data in a complex geological setting, characterised by thrust structures, in Southern Apennine, Southern Italy. Seismic data were collected by the «Global Offset» technique that is designed to record hight fold data in a wide range of offsets, without losing the benefit of near vertical reflection seismic. First arrivals picked from short to long offsets and the main reflections were inverted in order to produce a tomographic velocity-interface model. It was converted into a resistivity section applying an empirical relationship, obtained by well logs, between resistivity and velocity. That section was used as a reliable reference model for 2D inversion of magnetotelluric data collected along a parallel section very close to the seismic profile. The process was iterative and interactive and was aimed at producing consistent velocity and resistivity sections, honouring seismic and MT data set. The final MT model fits very well the observed apparent resistivity and phase, reproduces the main geological trends and its constrained by a well drilled close to the line. |
| first_indexed | 2024-12-13T02:05:21Z |
| format | Article |
| id | doaj.art-338817f43b304f50acf3a18ff27ea553 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-13T02:05:21Z |
| publishDate | 2002-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-338817f43b304f50acf3a18ff27ea5532022-12-22T00:03:08ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2002-06-0145210.4401/ag-3501Depth model building by constrained magnetotelluric inversionS. MorandiP. Dell'AversanaIn this paper we describe an approach aimed at integrating seismic and magnetotelluric data in a complex geological setting, characterised by thrust structures, in Southern Apennine, Southern Italy. Seismic data were collected by the «Global Offset» technique that is designed to record hight fold data in a wide range of offsets, without losing the benefit of near vertical reflection seismic. First arrivals picked from short to long offsets and the main reflections were inverted in order to produce a tomographic velocity-interface model. It was converted into a resistivity section applying an empirical relationship, obtained by well logs, between resistivity and velocity. That section was used as a reliable reference model for 2D inversion of magnetotelluric data collected along a parallel section very close to the seismic profile. The process was iterative and interactive and was aimed at producing consistent velocity and resistivity sections, honouring seismic and MT data set. The final MT model fits very well the observed apparent resistivity and phase, reproduces the main geological trends and its constrained by a well drilled close to the line.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3501magnetotelluricinversionintegrationseismic |
| spellingShingle | S. Morandi P. Dell'Aversana Depth model building by constrained magnetotelluric inversion Annals of Geophysics magnetotelluric inversion integration seismic |
| title | Depth model building by constrained magnetotelluric inversion |
| title_full | Depth model building by constrained magnetotelluric inversion |
| title_fullStr | Depth model building by constrained magnetotelluric inversion |
| title_full_unstemmed | Depth model building by constrained magnetotelluric inversion |
| title_short | Depth model building by constrained magnetotelluric inversion |
| title_sort | depth model building by constrained magnetotelluric inversion |
| topic | magnetotelluric inversion integration seismic |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3501 |
| work_keys_str_mv | AT smorandi depthmodelbuildingbyconstrainedmagnetotelluricinversion AT pdellaversana depthmodelbuildingbyconstrainedmagnetotelluricinversion |