2-D Inversion of magnetic data and gravity modelling of the transition zone between the Pernambuco-Alagoas domain and the northern portion of the Sergipano Belt (NE, Brazil)

Authors

DOI:

https://doi.org/10.21680/2447-3359.2021v7n2ID22049

Abstract

Two-dimensional magnetic inversions were performed with the purpose to obtain information about the magnetic susceptibility, depth and volume of true magnetic sources located in the basement adjacent to the Sergipe-Alagoas basin, in the transition zone between the Pernambuco-Alagoas Domain and the northern portion of the Sergipano Belt (Borborema Province, NE Brazil) and to delineate its geometries. The magnetic data processing was performed to interpret geological contacts, source’s edge boundaries and mapping of folds and shear zones. In the results of the magnetic inversion, a source was found in the Rio Coruripe domain between 9 and 21 km in depth with a magnetic susceptibility of 0.0079 (SI) and another in the Pernambuco-Alagoas domain between 7.5 and 9 km with a magnetic susceptibility of 0.0077 (SI). The basement’s depth was obtained through spectral analysis, whose base was found at 37.7 km. In addition, gravity models were created with the purpose to verify the information obtained by the magnetic inversion and spectral analysis, which was useful to understand how these sources interfere in the structure of the basement and how it affected its tectonic model.

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Author Biographies

Priscilla Alvarez, Universidade do Estado do Rio de Janeiro -UERJ

Doctoral student in Oceanography/Geophysics at the State University of Rio do Janeiro (UERJ), under the supervision of Profa. Dr. Natasha Stanton and a scholarship financed by Equinor through the Campos Project, coordinated by UFRJ, carrying out studies on the pre-salt tectonics of the Campos Basin through Potential Methods and Seismic Interpretation. Master in Applied Geophysics from the Federal University of Bahia (UFBA), with the theme of Seismostratigraphy correlated to Gravimetric Modeling. Bachelor's Degree in Geophysics from the Federal University of Bahia (UFBA). He also has a Specialization in Water Resources Management. Former member of the Theoretical and Applied Stratigraphy Group at UFBA (GETA), he has experience in seismic stratigraphy, seismic interpretation, sequence stratigraphy, seismic attributes, well interpretation and seismic-well mooring, in addition to knowledge of Kingdom Suite IHS, Seisee software , Schlumberger Log Data Toolbox, among others. He also has experience in the area of ??Potential Methods and has a good knowledge of Geosoft's Oasis Montaj software, having also worked with modeling, processing and inversion of potential data. She worked as a Scientific Initiation student with a scholarship in Potential Methods of the Geoterm-SEAL Project. He was an Experimental Physics II monitor at UFBA for two semesters. Former president of the UFBA Student Chapter (EAGE Geophysics Student Chapter: www.ufbastudentchapter.com.br). He has high school (2nd degree) and a technical course from the Federal Institute of Bahia (IFBA). He has a complete command of oral and advanced writing in English.

Allana Costa Dutra, Universidade Federal da Bahia, Instituto de Física.

Graduated in Physics from the State University of Santa Cruz in 2004, Master's in Geophysics from the University of São Paulo in 2006 and Ph.D. in Geophysics from the University of São Paulo in 2011. Professor at the Department of Earth and Environment Physics at the Institute of Physics at the University Federal da Bahia, develops research involving topics related to Modeling and Inversion of geophysical data, Potential Methods, Magnetotelluric Method and Study in Lithosphere Geothermia.

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Published

22-07-2021

How to Cite

ALVAREZ, Priscilla; DUTRA, Allana Costa. 2-D Inversion of magnetic data and gravity modelling of the transition zone between the Pernambuco-Alagoas domain and the northern portion of the Sergipano Belt (NE, Brazil). Notheast Geoscience Journal, [S. l.], v. 7, n. 2, p. 11–23, 2021. DOI: 10.21680/2447-3359.2021v7n2ID22049. Disponível em: https://periodicos.ufrn.br/revistadoregne/article/view/22049. Acesso em: 22 aug. 2026.

Issue

v. 7 n. 2 (2021)

Section

Artigos

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