Detecção de cavidades EM arenitos utilizando gravimetria, eletrorresistividade e GPR

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dc.contributor.authorDourado, João C.
dc.contributor.authorMalagutti Filho, Walter
dc.contributor.authorBraga, Antônio C. O.
dc.contributor.authorNava, Noedir
dc.contributor.institutionIGCE
dc.contributor.institutionMineração Jundu S. A.
dc.date.accessioned2022-04-29T08:43:11Z
dc.date.available2022-04-29T08:43:11Z
dc.date.issued2001-12-01
dc.description.abstractThis paper shows the results of geophysical research in areas of sand exploration near the city of Descalvado, SP, Brazil. The main objective of this research is to detect cavities inside sandstones belonging to the Piramboia and Botucatu Formations in the Parana sedimentary basin. These cavities were indirectly caused by human activity, i.e., the lowering of the water table for the purpose of sand extraction. The geophysical techniques employed were: gravity, resistivity (dipole-dipole electrical profiling) and ground penetrating radar (GPR). In the first stage of the work gravity and resistivity surveys were used to indicate where exists voids due to the collapse of the roof of a cavity. The results obtained with these two techniques were coherent because the gravity showed a mass absence in the area of influence of the cavity and the dipole-dipole electrical profiling detected an increase of electric resistivity in this same area. In the second stage, the GPR survey detected the same cavities by means of the hyperbolic features that appear in the radargrams.en
dc.description.affiliationDepartamento de Geologia Aplicada IGCE Campus de Rio Claro, Rio Claro - SP
dc.description.affiliationMineração Jundu S. A., Descalvado - SP
dc.format.extent19-32
dc.identifier.citationRevista Brasileira de Geofisica, v. 19, n. 1, p. 19-32, 2001.
dc.identifier.issn0102-261X
dc.identifier.scopus2-s2.0-30544434342
dc.identifier.urihttp://hdl.handle.net/11449/231002
dc.language.isopor
dc.language.isoeng
dc.relation.ispartofRevista Brasileira de Geofisica
dc.sourceScopus
dc.subjectApplied geophysics
dc.subjectDetection of cavities
dc.subjectGravity
dc.subjectGround penetrating radar
dc.subjectResistivity
dc.titleDetecção de cavidades EM arenitos utilizando gravimetria, eletrorresistividade e GPRpt
dc.title.alternativeDetection of cavities in sandstone using gravity, resistivity and GPR methodsen
dc.typeArtigo

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