The city of Ouro Preto is situated on morphologically rugged terrain due to the lithological and structural complexity. The lack of planning during its occupation since the 18th-century gold rush resulted in the concentration of residences built in areas of high geotechnical instability. Currently, catastrophic events resulting in property loss and loss of lives have become common, especially during rainy periods. For the research, an area was delimited in agreement with the Civil Defense, characterized by intense disorderly occupation and high geotechnical risk. The study aimed to understand and delimit the areas of greatest risk, raising awareness among the population and enabling competent authorities to take appropriate mitigating measures. The work consisted of reviewing, processing, and analyzing geological, geotechnical, and geophysical data existing in the region to characterize areas for detailed study. The detailed analysis included aerophotogrammetry, terrestrial magnetometry, gravimetry, and electroresistivity surveys conducted during both rainy and drought periods to identify underground structures in the area, along with a more comprehensive geotechnical classification. Through this research, a better understanding of the geotechnical conditions of the area was obtained, and areas more susceptible to risks were identified. Additionally, the local community’s awareness of geotechnical risks was raised, contributing to authorities’ efforts to reduce the consequences of adverse events and promote the safety and well-being of the community of Ouro Preto.
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SEG/AAPG International Meeting for Applied Geoscience & Energy
August 27–September 1, 2023
Houston, Texas
Geophysics applied to geotechnical study in Ouro Preto, MG-Brazil — Part 2
Gabriel do Nascimento Cardoso;
Gabriel do Nascimento Cardoso
Federal University of Ouro Preto
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Maria Sílvia Carvalho Barbosa;
Maria Sílvia Carvalho Barbosa
Federal University of Ouro Preto
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Luís Artur Souza Oliveira;
Luís Artur Souza Oliveira
Federal University of Ouro Preto
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Joney Justo da Silva;
Joney Justo da Silva
Federal University of Ouro Preto
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Rafaela Elizabete Araújo Maia;
Rafaela Elizabete Araújo Maia
Federal University of Ouro Preto
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Julia Ferreira Schiavon;
Julia Ferreira Schiavon
Federal University of Ouro Preto
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Fernando Antônio de Oliveira;
Fernando Antônio de Oliveira
Federal University of Ouro Preto
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Pedro Lourenço dos Reis
Pedro Lourenço dos Reis
Federal University of Ouro Preto
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Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, August 2023.
Paper Number:
SEG-2023-3916605
Published:
August 27 2023
Citation
Cardoso, Gabriel do Nascimento, Barbosa, Maria Sílvia Carvalho, Oliveira, Luís Artur Souza, Justo da Silva, Joney, Elizabete Araújo Maia, Rafaela, Ferreira Schiavon, Julia, Antônio de Oliveira, Fernando, and Pedro Lourenço dos Reis. "Geophysics applied to geotechnical study in Ouro Preto, MG-Brazil — Part 2." Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, August 2023. doi: https://doi.org/10.1190/image2023-3916605.1
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