We show that high-resolution aeromagnetic surveys, although rarely employed in the research of salt structures, may be an effective and low-cost tool for mapping diapirism. A multiscale analysis of a high-resolution magnetic data set at Nordkapp Basin in the Barents Sea, allows a clear reconstruction of the main salt diapirs of the basin using Multiridge and Compact Depth from Extreme Points methods. We provide a 3-D model of the diapirs extended from 500 to 4,000 m below sea level, characterized by a general low magnetization contrast no larger than −0.08 A/m. The 3-D model is consistent with the salt top depth estimated by 2-D seismics, with borehole data and with the 2-D gravity model of the Uranus diapir. Our imaging shows the capability of the magnetic method that gives new and comprehensive pictures of salt diapirism.

Magnetic Field Imaging of Salt Structures at Nordkapp Basin, Barents Sea / Paoletti, V.; Milano, M.; Baniamerian, J.; Fedi, M.. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - 47:18(2020). [10.1029/2020GL089026]

Magnetic Field Imaging of Salt Structures at Nordkapp Basin, Barents Sea

Paoletti V.;Milano M.
;
Fedi M.
2020

Abstract

We show that high-resolution aeromagnetic surveys, although rarely employed in the research of salt structures, may be an effective and low-cost tool for mapping diapirism. A multiscale analysis of a high-resolution magnetic data set at Nordkapp Basin in the Barents Sea, allows a clear reconstruction of the main salt diapirs of the basin using Multiridge and Compact Depth from Extreme Points methods. We provide a 3-D model of the diapirs extended from 500 to 4,000 m below sea level, characterized by a general low magnetization contrast no larger than −0.08 A/m. The 3-D model is consistent with the salt top depth estimated by 2-D seismics, with borehole data and with the 2-D gravity model of the Uranus diapir. Our imaging shows the capability of the magnetic method that gives new and comprehensive pictures of salt diapirism.
2020
Magnetic Field Imaging of Salt Structures at Nordkapp Basin, Barents Sea / Paoletti, V.; Milano, M.; Baniamerian, J.; Fedi, M.. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - 47:18(2020). [10.1029/2020GL089026]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/832132
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