Structure and tectonic significance of high-and low-temperature deformation along the lateral escape-related guaçuí and batatal shear zones, Southern Araçuaí Orogen (Southeastern Brazil)

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dc.contributor.authorHartwig, Marcos Eduardo
dc.contributor.authorde Melo, Marilane Gonzaga
dc.contributor.authorMoreira, César Augusto [UNESP]
dc.contributor.institutionUniversidade Federal do Espírito Santo (UFES)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-06-25T10:12:09Z
dc.date.available2021-06-25T10:12:09Z
dc.date.issued2020-10-01
dc.description.abstractThe Guacuí and Batatal lineaments in the southern region of the state of Es-pírito Santo (southeastern Brazil) can be traced from satellite images for tens of kilometers. They are considered shear zones associated to the final tectonic stages of the Araçuaí-West Congo (A-WC) Orogen during the Ediacaran-Cambrian period. In order to understand their nature and tectonic implications for the development of the orogeny, we integrated geological and structural data based on fieldwork and detailed microstructural analysis. Data was collected along two profiles located at the central segments of both structures. The results demonstrated that the Guaçuí shear zone (GSZ) is a typical ductile transpressive shear zone with approximately 9 km width that shows numerous dextral kinematic indicators and records meta-morphism of upper amphibolite facies. The GSZ shows different levels of intensity of dynamic deformation. The Batatal shear zone (BSZ) is a narrow brittle shear zone that shows essentially brittle microstructures (intercrystalline microfractures) revealing deformation at low-grade conditions (frictional regime). Based on their characteristics and the level of erosion of the rocks exposed in the region, we inter-pret that GSZ developed prior to BSZ.en
dc.description.affiliationUniversidade Federal do Espírito Santo-UFES Departamento de Geologia Centro de Ciências Naturais e da Saúde
dc.description.affiliationUniversidade Estadual Paulista-UNESP Departamento de Geologia Instituto de Geociências e Ciências Exatas
dc.description.affiliationUnespUniversidade Estadual Paulista-UNESP Departamento de Geologia Instituto de Geociências e Ciências Exatas
dc.format.extent499-512
dc.identifierhttp://dx.doi.org/10.1590/0370-44672020730043
dc.identifier.citationREM - International Engineering Journal., v. 73, n. 4, p. 499-512, 2020.
dc.identifier.doi10.1590/0370-44672020730043
dc.identifier.fileS2448-167X2020000400499.pdf
dc.identifier.issn2448-167X
dc.identifier.scieloS2448-167X2020000400499
dc.identifier.scopus2-s2.0-85091865983
dc.identifier.urihttp://hdl.handle.net/11449/205242
dc.language.isoeng
dc.relation.ispartofREM - International Engineering Journal.
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAraçuaí orogen
dc.subjectDeformation
dc.subjectMicrofractures
dc.subjectMylonites
dc.subjectShear zones
dc.titleStructure and tectonic significance of high-and low-temperature deformation along the lateral escape-related guaçuí and batatal shear zones, Southern Araçuaí Orogen (Southeastern Brazil)en
dc.typeArtigo
unesp.author.orcid0000-0002-2661-7506[1]
unesp.author.orcid0000-0003-3397-3258[2]
unesp.author.orcid0000-0002-9504-7025[3]

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