Tectonics of the Northeastern border of the Parana Basin (Southeastern Brazil) revealed by lineament domain analysis

Pinheiro, Marcos Roberto; Cianfarra, Paola; Villela, Fernando Nadal Junqueira; Salvini, Francesco

doi:10.1016/j.jsames.2019.102231

Cited by 20 publications

(35 citation statements)

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“…The solution presented in Figure 6A describes a paleostress characterized by sub-horizontal σ1 and σ3 oriented N349 • (or N11 • W) and N259 • (or N79 • E), respectively. This is compatible with a right-lateral sense of shear along an E-W regional shear corridor (whose existence has been suggested by previous authors, e.g., Zalán et al [56], Saadi [21], Morales [57], and Pinheiro et al [58]). As the angle between the regional shear corridor and the computed σ1 is bigger than 45 • (specifically, 79 • ), a transpressional component of 61% exists along the regional E-W corridor of deformation (e.g., Rossi et al [49]).…”

Section: Field Structural Datasupporting

confidence: 90%

Brittle Deformation in the Neoproterozoic Basement of Southeast Brazil: Traces of Intraplate Cenozoic Tectonics

Pinheiro

Cianfarra

2021

Geosciences

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The basement of southeast Brazil is traditionally interpreted as the result of Neoproterozoic and early Paleozoic orogenic cycles. Wide regions of the Atlantic Plateau (southeast Brazil) are characterized by rocks and tectonic structures of Precambrian age. According to the classical literature, these regions have not been affected by tectonics since the Miocene, despite the fact that they rest close to Cenozoic basins, which have suffered recent tectonic deformation. The objective of this research is to evaluate the role of neotectonics in the Atlantic Plateau. This task is accomplished through a multiscalar approach which includes lineament domain analysis from regionally sized digital elevation models and structural geology field surveys. Lineaments are automatically detected and statistically analyzed. Azimuthal analyses of data on faults and fractures by a polynomial Gaussian fit enables the identification of the main structural trends. Fault-slip direct inversion by means of the original Monte Carlo approach allows one to compute the multiple paleostresses that produced the measured fault population. The results show the presence of a principal ENE–WSW lineament domain, related to an old shear zone possibly reactivated since the Miocene. One of the paleostresses computed from fault-slip inversion is in agreement with the neotectonic stress-field proposed by other authors.

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Section: Field Structural Datasupporting

confidence: 90%

Brittle Deformation in the Neoproterozoic Basement of Southeast Brazil: Traces of Intraplate Cenozoic Tectonics

Pinheiro

Cianfarra

2021

Geosciences

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“…Since few erosive agents are expected on Enceladus’ surface, lineaments are already discernible on the surface. They are spatially distributed within a well‐defined area affected by tectonic stress and cluster around preferential orientations to form lineament domains that are parallel to the maximum horizontal stress ( Sh max ) and perpendicular to the minimum horizontal stress ( Sh min ) (Pinheiro et al., 2019; Wise et al., 1985). In this way, lineament domains can be used to infer the crustal stresses and kinematics of the upper crust at regional scale (Cianfarra & Salvini, 2014, 2016b; Lucianetti et al., 2017; Pinheiro et al., 2019; Wise, 1982; Wise et al., 1985).…”

Section: Structural Analyses and Resultsmentioning

confidence: 99%

“…Azimuthal analyses were performed by means of spatial polymodal Gaussian best fit techniques that enabled identification of independent azimuthal groups both in the mapped structures (Sections 3.1 and 3.2) and lineaments (Section 3.3) and were automatically identified in the SPT (e.g., Cianfarra & Salvini, 2014, 2015Lucianetti et al, 2017;Pinheiro et al, 2019;Rossi et al, 2018;Wise et al, 1985). Spatial frequencies were investigated to infer the periodicity of the structures related to tectonic conditions.…”

Section: Structural Analyses and Resultsmentioning

confidence: 99%

“…According to Pinheiro et al. (2019), the main NW‐SE lineament domain is parallel to the maximum horizontal stress ( Sh max ) and is orthogonal to the minimum horizontal stress ( Sh min ) and indicates transtensional structures which are compatible with E‐W right‐lateral kinematics. On the other hand, the opposite trend of the second NE‐SW lineament domain is compatible with left‐lateral kinematics.…”

Section: Discussionmentioning

confidence: 99%

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Tectonics of Enceladus’ South Pole: Block Rotation of the Tiger Stripes

et al. 2020

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Observations of water vapor and ice-crystal plumes emanating from the south polar region of Enceladus are among the most striking discoveries of the Cassini-Huygens Mission (e.g., Hansen et al., 2006; C. C. Porco et al., 2006; Spencer et al., 2006). This plume activity is associated with tectonically and thermally active terrains, witnessing strong interactions with the interior dynamics. Both chemical and geophysical measurements performed by the Cassini spacecraft imply that this activity is most likely related to the existence of a liquid salty layer at relatively shallow depth underneath the icy crust at the south pole which is possibly associated with hydrothermal activity at the seafloor (

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“…Além de verificar a gênese do modelado de relevo e dos solos, também se lançou na investigação o contexto neotectônico da região, possibilitando melhor compreensão da relação entre modelado de relevo, processos e materiais na transição Planalto Ocidental -Depressão Periférica Paulista (PINHEIRO et al 2019, CIANFARRA et al 2019. Porém, dado o caráter complexo da área de estudo, exemplificado pelas transições do domínio da escarpa de cuesta para as colinas da Depressão Periférica, não foram totalmente esclarecidos os aspectos e associações quanto à litoestrutura e características do modelado de relevo, tais como rupturas de declive e cobertura pedológica, muito pela falta da análise de transectos que compreendessem a espacialização e conexão destas unidades geomorfológicas em uma perspectiva integrada.…”

Section: Introductionunclassified

Análise integrada da paisagem: perfis geoecológicos na transição Planalto Ocidental - Depressão Periférica no município de São Pedro, estado de São Paulo

Ramos¹,

Barreiros²,

Villela³

et al. 2019

Rev. Inst. Geol.

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O presente artigo aborda as contribuições advindas do uso de perfis geoecológicos na análise integrada da paisagem. A pesquisa foi baseada no estudo de transectos na transição do Planalto Ocidental para a Depressão Periférica em São Pedro - SP, e buscou compreender a organização e dinâmica da paisagem local, de modo a hierarquizar as forças atuantes em uma perspectiva geossistêmica. Fazendo uso de bases cartográficas, fotografias aéreas e imagem SRTM, levantaram-se características geológicas, geomorfológicas, pedológicas e hidrográficas, bem como a vegetação original e uso da terra atual. Ainda no contexto geográfico, foi possível estabelecer relações sistêmicas entre os temas escolhidos e suas respectivas escalas de atuação, verificando-se a interação dos elementos que compõem a paisagem a partir de um perfil síntese, permitindo também melhor compreensão da atuação antrópica na área de estudo. Os resultados demonstraram forte influência de caráter litoestrutural, assim como uma ocupação antrópica dependente das condições topográficas e pedológicas.

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Tectonics of the Northeastern border of the Parana Basin (Southeastern Brazil) revealed by lineament domain analysis

Cited by 20 publications

References 54 publications

Brittle Deformation in the Neoproterozoic Basement of Southeast Brazil: Traces of Intraplate Cenozoic Tectonics

Brittle Deformation in the Neoproterozoic Basement of Southeast Brazil: Traces of Intraplate Cenozoic Tectonics

Tectonics of Enceladus’ South Pole: Block Rotation of the Tiger Stripes

Análise integrada da paisagem: perfis geoecológicos na transição Planalto Ocidental - Depressão Periférica no município de São Pedro, estado de São Paulo

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