3D characterization of the magnetic response of the Aimorés Intrusive Complex (Brazil) aiming to identify similarities with impact craters

PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded Abstracts3D characterization of the magnetic response of the Aimorés Intrusive Complex (Brazil) aiming to identify similarities with impact cratersAuthors: Maria OliveiraAline MeloMarcos VasconcelosMariana BandeiraMaria OliveiraInstituto de Geociências, Universidade Federal de Minas GeraisSearch for more papers by this author, Aline MeloInstituto de Geociências, Universidade Federal de Minas Gerais, and presently University College DublinSearch for more papers by this author, Marcos VasconcelosInstituto de Geociências, Universidade Federal da BahiaSearch for more papers by this author, and Mariana BandeiraInstituto de Geociências, Universidade Federal de Minas GeraisSearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3594763.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractThe Aimorés Intrusive Complex (AIC), located in the Araçuaí Belt (Brazil), has topographical features similar to an impact crater. The ellipsoidal to circular morphology and ring-shaped edge is easily recognized on satellite images and for many years the structure was named the Aimorés Impact Crater. However, detailed geologic mapping shows that the morphology is associated with an igneous body that was intruded during the post-collisional events related to the Araçuaí orogen. This work aims to characterize the AIC in 3D, understand the geometry of the different lithological zones, and compare its magnetic signature with impact craters. Through the integration of geological mapping and petrography information, we propose a methodology for defining the susceptibility bounds for the inversion of magnetic data. The inversion results show a low susceptibility response at the central part, while the higher values come from the edges of the zoned igneous rocks of the Complex. Its semi-circular anomaly is different from positive anomalies associated with the central-uplift of proved impact craters. We show structures with similar topographic characteristics on the surface and different geometries in the subsurface.Keywords: magnetics, interpretation, inversionPermalink: https://doi.org/10.1190/segam2021-3594763.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Maria Oliveira, Aline Melo, Marcos Vasconcelos, and Mariana Bandeira, (2021), "3D characterization of the magnetic response of the Aimorés Intrusive Complex (Brazil) aiming to identify similarities with impact craters," SEG Technical Program Expanded Abstracts : 900-904. https://doi.org/10.1190/segam2021-3594763.1 Plain-Language Summary KeywordsmagneticsinterpretationinversionPDF DownloadLoading ...