Sources of the lithosphere magnetic field based on magnetic data obtained at different heights
Abstract Our investigations are based on the property that the fields of sources, whose depths are numerically equal to survey heights, are most brightly presented in the data of magnetic survey. Therefore, the magnetic field created by the upper boundary of the magnetically active layer is well pre...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-11-01
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| Series: | Earth, Planets and Space |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40623-018-0955-9 |
| _version_ | 1818129136241082368 |
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| author | Yury P. Tsvetkov Konstantin V. Novikov Andrey A. Ivanov Oleg M. Brekhov |
| author_facet | Yury P. Tsvetkov Konstantin V. Novikov Andrey A. Ivanov Oleg M. Brekhov |
| author_sort | Yury P. Tsvetkov |
| collection | DOAJ |
| description | Abstract Our investigations are based on the property that the fields of sources, whose depths are numerically equal to survey heights, are most brightly presented in the data of magnetic survey. Therefore, the magnetic field created by the upper boundary of the magnetically active layer is well presented in the data of magnetic surveys (survey heights are up to the first kilometres), whereas the geomagnetic field of the centre mass is well presented in the data of gradient magnetic surveys at heights of 20–40 km. These data were used separately for the interpretation of the depths of the upper and lower boundaries of the lithospheric magnetically active layer by spectral methods. This fact is especially valuable for estimating the positions of deep sources. For the central part of the East European platform, we obtained by spectral methods, the following values: the depth of the upper boundary of the layer is 8.5 km and that of the lower boundary of the layer is 64.3 km. The discrete localisation of the source depths along the profile is performed by the methods of converting the initial information into transformed fields, continuation upward, and reduction to the pole with the determination of singular points. The Poisson integral, representing the solution of the outer Dirichlet problem for the plane, served as a theoretical base for such an interpretation. These approaches made it possible to determine more exactly the localisation of deep sources along the profile and showed that the published magnetic maps based on aeromagnetic data do not contain in full measure the fields of deep-seated magnetic sources. |
| first_indexed | 2024-12-11T07:44:21Z |
| format | Article |
| id | doaj.art-bee0a189b662402482f4e5e9c2305be7 |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-12-11T07:44:21Z |
| publishDate | 2018-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Earth, Planets and Space |
| spelling | doaj.art-bee0a189b662402482f4e5e9c2305be72022-12-22T01:15:29ZengSpringerOpenEarth, Planets and Space1880-59812018-11-017011910.1186/s40623-018-0955-9Sources of the lithosphere magnetic field based on magnetic data obtained at different heightsYury P. Tsvetkov0Konstantin V. Novikov1Andrey A. Ivanov2Oleg M. Brekhov3Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation RAS (IZMIRAN)State-Owned Company «Hydrospetzgeologiya»Russian State Geological Prospecting University (MGRI-RGGRU)Moscow Aviation Institute (MAI)Abstract Our investigations are based on the property that the fields of sources, whose depths are numerically equal to survey heights, are most brightly presented in the data of magnetic survey. Therefore, the magnetic field created by the upper boundary of the magnetically active layer is well presented in the data of magnetic surveys (survey heights are up to the first kilometres), whereas the geomagnetic field of the centre mass is well presented in the data of gradient magnetic surveys at heights of 20–40 km. These data were used separately for the interpretation of the depths of the upper and lower boundaries of the lithospheric magnetically active layer by spectral methods. This fact is especially valuable for estimating the positions of deep sources. For the central part of the East European platform, we obtained by spectral methods, the following values: the depth of the upper boundary of the layer is 8.5 km and that of the lower boundary of the layer is 64.3 km. The discrete localisation of the source depths along the profile is performed by the methods of converting the initial information into transformed fields, continuation upward, and reduction to the pole with the determination of singular points. The Poisson integral, representing the solution of the outer Dirichlet problem for the plane, served as a theoretical base for such an interpretation. These approaches made it possible to determine more exactly the localisation of deep sources along the profile and showed that the published magnetic maps based on aeromagnetic data do not contain in full measure the fields of deep-seated magnetic sources.http://link.springer.com/article/10.1186/s40623-018-0955-9Crustal magnetic anomalyBalloon magnetic surveysDepths of anomalous magnetic field sourcesCurie point depth |
| spellingShingle | Yury P. Tsvetkov Konstantin V. Novikov Andrey A. Ivanov Oleg M. Brekhov Sources of the lithosphere magnetic field based on magnetic data obtained at different heights Earth, Planets and Space Crustal magnetic anomaly Balloon magnetic surveys Depths of anomalous magnetic field sources Curie point depth |
| title | Sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| title_full | Sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| title_fullStr | Sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| title_full_unstemmed | Sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| title_short | Sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| title_sort | sources of the lithosphere magnetic field based on magnetic data obtained at different heights |
| topic | Crustal magnetic anomaly Balloon magnetic surveys Depths of anomalous magnetic field sources Curie point depth |
| url | http://link.springer.com/article/10.1186/s40623-018-0955-9 |
| work_keys_str_mv | AT yuryptsvetkov sourcesofthelithospheremagneticfieldbasedonmagneticdataobtainedatdifferentheights AT konstantinvnovikov sourcesofthelithospheremagneticfieldbasedonmagneticdataobtainedatdifferentheights AT andreyaivanov sourcesofthelithospheremagneticfieldbasedonmagneticdataobtainedatdifferentheights AT olegmbrekhov sourcesofthelithospheremagneticfieldbasedonmagneticdataobtainedatdifferentheights |