Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin.
We characterize the subsurface structure of the basement adjacent to the Sergipe Sub-basin using gravimetric data to provide information on the distribution of density contrast, geometry and depths of the main sources, from acquisition, processing, and direct and inverse two-dimensional modeling. Su...
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oai:periodicos.ufrn.br:article-217662022-03-23T19:08:02Z Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. Caracterización del sótano adyacente a la subcuenca de Sergipe, Brasil: modelado bidimensional directo e inverso de datos gravimétricos. Caracterização do Embasamento Adjacente à Sub-Bacia Sergipe, Brasil: Modelagem Bidimensional direta e inversa de dados gravimétricos. Sampaio, Mariana Rosário Conceição Dutra, Alanna Costa Costa, Alexandre Barreto We characterize the subsurface structure of the basement adjacent to the Sergipe Sub-basin using gravimetric data to provide information on the distribution of density contrast, geometry and depths of the main sources, from acquisition, processing, and direct and inverse two-dimensional modeling. Such information generated an optimization of the understanding in relation to the basement framework and its relationship with the sedimentary part of the Sergipe sub-basin. The study was based on geological information, density of rocks collected in the locality, gravimetric data, and interpretation of magnetic maps. The two-dimensional gravimetric inversion allowed us to reach an optimal result for the density contrast value of the main sources, which was 0.15-0.20 g/cm³. Anomalous sources have been mapped reaching depths of 5 to 7 km. In the sedimentary region of the sub-basin, its sediment-basement interface reaches a limit of 4 to 5 km in depth. The integration of these data allowed for a more realistic subsurface density model, as well as an interpretive geological model, and predicts that the dome regions of this basement are accommodated in the upper part of the crust. Neste trabalho caracterizamos a estrutura em subsuperfície do embasamento adjacente à Sub-bacia Sergipe utilizando dados gravimétricos para fornecer informações sobre a distribuição do contraste de densidade, a geometria e profundidades das principais fontes, a partir da aquisição, processamento, e modelagem bidimensional direta e inversa desses dados. Tais informações geraram uma otimização do entendimento em relação ao arcabouço do embasamento e sua relação com a parte sedimentar da sub-bacia Sergipe. Tivemos como base do estudo informações geológicas, densidade das rochas coletadas na localidade, dados gravimétricos, e interpretação de mapas magnéticos. A inversão bidimensional gravimétrica nos permitiu chegar a um resultado ótimo para o valor contraste de densidade das principais fontes que foi de 0.15-0.20 g/cm³. Algumas fontes anômalas foram mapeadas alcançando profundidades de 5 a 7 km. Na região sedimentar da sub-bacia, a sua interface sedimento-embasamento chega ao limite de 4 a 5 km de profundidade. A integração desses dados permitiu ter um modelo de densidade em subsuperfície mais realista, assim como um modelo geológico interpretativo, e prevê que as regiões dômicas desse embasamento estão acomodados na parte superior da crosta. Universidade Federal do Rio Grande do Norte 2022-01-26 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf application/pdf https://periodicos.ufrn.br/revistadoregne/article/view/21766 Notheast Geoscience Journal; Vol. 8 No. 1 (2022); 28-46 Revista de Geociências do Nordeste; v. 8 n. 1 (2022); 28-46 2447-3359 10.21680/2447-3359.2022v8n1 por eng https://periodicos.ufrn.br/revistadoregne/article/view/21766/15380 https://periodicos.ufrn.br/revistadoregne/article/view/21766/15381 Copyright (c) 2022 Revista de Geociências do Nordeste |
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Periódicos UFRN |
| collection |
Portal de Pediódicos Eletrônicos da UFRN |
| language |
por eng |
| format |
Online |
| author |
Sampaio, Mariana Rosário Conceição Dutra, Alanna Costa Costa, Alexandre Barreto |
| spellingShingle |
Sampaio, Mariana Rosário Conceição Dutra, Alanna Costa Costa, Alexandre Barreto Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| author_facet |
Sampaio, Mariana Rosário Conceição Dutra, Alanna Costa Costa, Alexandre Barreto |
| author_sort |
Sampaio, Mariana Rosário Conceição |
| title |
Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| title_short |
Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| title_full |
Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| title_fullStr |
Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| title_full_unstemmed |
Direct and inverse 2-D gravimetric modeling of the crustal structure at the base adjacent to the Sergipe Sub-basin. |
| title_sort |
direct and inverse 2-d gravimetric modeling of the crustal structure at the base adjacent to the sergipe sub-basin. |
| description |
We characterize the subsurface structure of the basement adjacent to the Sergipe Sub-basin using gravimetric data to provide information on the distribution of density contrast, geometry and depths of the main sources, from acquisition, processing, and direct and inverse two-dimensional modeling. Such information generated an optimization of the understanding in relation to the basement framework and its relationship with the sedimentary part of the Sergipe sub-basin. The study was based on geological information, density of rocks collected in the locality, gravimetric data, and interpretation of magnetic maps. The two-dimensional gravimetric inversion allowed us to reach an optimal result for the density contrast value of the main sources, which was 0.15-0.20 g/cm³. Anomalous sources have been mapped reaching depths of 5 to 7 km. In the sedimentary region of the sub-basin, its sediment-basement interface reaches a limit of 4 to 5 km in depth. The integration of these data allowed for a more realistic subsurface density model, as well as an interpretive geological model, and predicts that the dome regions of this basement are accommodated in the upper part of the crust. |
| publisher |
Universidade Federal do Rio Grande do Norte |
| publishDate |
2022 |
| url |
https://periodicos.ufrn.br/revistadoregne/article/view/21766 |
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