Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica
This paper proposes a digital enhancement tool for magnetic anomaly maps. The magnetic anomaly map is decomposedby means of Eigenvalue Decomposition into a number of orthogonal bases. The dataset is then filteredaccordingly to a specific variance pattern. The dataset is decomposed and the eigenvalue...
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ftopenaccessrep:oai:zenodo.org:130211 2023-10-29T02:32:03+01:00 Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica M. Gambetta 2010-03-04 https://www.openaccessrepository.it/record/130211 https://doi.org/10.4401/ag-4641 und unknown url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/130211 doi:10.4401/ag-4641 info:eu-repo/semantics/openAccess Rural Digital Europe NEANIAS Atmospheric Research Community Geophysics info:eu-repo/semantics/article publication-article 2010 ftopenaccessrep https://doi.org/10.4401/ag-4641 2023-10-03T22:17:22Z This paper proposes a digital enhancement tool for magnetic anomaly maps. The magnetic anomaly map is decomposedby means of Eigenvalue Decomposition into a number of orthogonal bases. The dataset is then filteredaccordingly to a specific variance pattern. The dataset is decomposed and the eigenvalues population is inspectedso that the variance is evaluated yielding the definition of two thresholds. Subsequently, the dataset isreconstructed into three subsets which hold different features respectively. The proposed filtering procedure isfirst tested with a synthetic signal and then applied to the data of Cape Roberts (Antarctica) aeromagnetic survey,flown over an off-shore rift basin. The proposed method appears to be efficient in noise removal and acts asa digital enhancement tool which provides TMI anomaly maps revealing hidden lineaments, otherwise not visible.The methodology effectiveness as a hidden lineaments detection tool has been checked against independentdata. Article in Journal/Newspaper Antarc* Antarctica Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Annals of Geophysics 52 2 |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
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unknown |
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Rural Digital Europe NEANIAS Atmospheric Research Community Geophysics |
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Rural Digital Europe NEANIAS Atmospheric Research Community Geophysics M. Gambetta Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
topic_facet |
Rural Digital Europe NEANIAS Atmospheric Research Community Geophysics |
description |
This paper proposes a digital enhancement tool for magnetic anomaly maps. The magnetic anomaly map is decomposedby means of Eigenvalue Decomposition into a number of orthogonal bases. The dataset is then filteredaccordingly to a specific variance pattern. The dataset is decomposed and the eigenvalues population is inspectedso that the variance is evaluated yielding the definition of two thresholds. Subsequently, the dataset isreconstructed into three subsets which hold different features respectively. The proposed filtering procedure isfirst tested with a synthetic signal and then applied to the data of Cape Roberts (Antarctica) aeromagnetic survey,flown over an off-shore rift basin. The proposed method appears to be efficient in noise removal and acts asa digital enhancement tool which provides TMI anomaly maps revealing hidden lineaments, otherwise not visible.The methodology effectiveness as a hidden lineaments detection tool has been checked against independentdata. |
format |
Article in Journal/Newspaper |
author |
M. Gambetta |
author_facet |
M. Gambetta |
author_sort |
M. Gambetta |
title |
Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
title_short |
Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
title_full |
Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
title_fullStr |
Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
title_full_unstemmed |
Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica |
title_sort |
modal decomposition of magnetic maps: the case of cape roberts aeromagnetic survey, antarctica |
publishDate |
2010 |
url |
https://www.openaccessrepository.it/record/130211 https://doi.org/10.4401/ag-4641 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/130211 doi:10.4401/ag-4641 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.4401/ag-4641 |
container_title |
Annals of Geophysics |
container_volume |
52 |
container_issue |
2 |
_version_ |
1781053083783004160 |