Geophysical Research Letters · 2020 · 24 citations · 48 references
Natural SciencesEarth SciencesGeophysicsGeomagnetismMarine GeologyMarine GeophysicsBathymetryMagnetic MethodsMagnetic SurveyingSeafloor MappingSeafloor TopographySeismic ImagingAeromagnetic SurveysDiapirismExtreme PointsHigh-resolution Magnetic SurveysMultiscale AnalysisSalt DiapirismSalt DiapirsSalt Structure Imaging
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.
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75th Anniversary: The historical development of the magnetic method in exploration
Misac N. Nabighian, V.J.S. Grauch, R. O. Hansen et al. · Geophysics · 2005 · 690 citations