2021
DOI: 10.1590/2317-4889202120190132
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Abstract: The Southeastern Brazilian Margin presents a NE-SW-striking structural framework, which is characteristic of the Neoproterozoic Ribeira Belt. Other important structural trends along the area are associated with E-W and NW-SE-striking structures, being most related to the Mesozoic-Cenozoic tectonic evolution. A succession of Cenozoic tectonic events has been described by many authors in the Southeastern Brazilian. Among those Cenozoic tectonic events, a Neogene to Quaternary E-W dextral strike-slip regime (EW-D… Show more

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“…Such faults present both sinistral and dextral movements, sometimes with oblique movements, and are compatible with the existence of the regional E-W shear corridor. One of the paleostresses calculated (NNW-SSE compression and ENE-WSW extension) is fully compatible with the neotectonic stress inferred by other studies (e.g., Hiruma et al [60]; Riccomini et al [10,22]; Fernandes and Amaral [44]; Santos and Ladeira [69]; Silva and Mello [70]; Pinheiro and Queiroz Neto [71]; Pinheiro et al [58]; Giro et al [63]; Brêda et al [62]; and Silva et al [73]) and with the more recent right-lateral kinematics with transpressional component along the E-W shear zone. In addition, some of the measured faults offset Quaternary deposits.…”
Section: Discussionsupporting
confidence: 88%
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“…Such faults present both sinistral and dextral movements, sometimes with oblique movements, and are compatible with the existence of the regional E-W shear corridor. One of the paleostresses calculated (NNW-SSE compression and ENE-WSW extension) is fully compatible with the neotectonic stress inferred by other studies (e.g., Hiruma et al [60]; Riccomini et al [10,22]; Fernandes and Amaral [44]; Santos and Ladeira [69]; Silva and Mello [70]; Pinheiro and Queiroz Neto [71]; Pinheiro et al [58]; Giro et al [63]; Brêda et al [62]; and Silva et al [73]) and with the more recent right-lateral kinematics with transpressional component along the E-W shear zone. In addition, some of the measured faults offset Quaternary deposits.…”
Section: Discussionsupporting
confidence: 88%
“…The paleostress described in Figure 6A, whose Shmax and Shmin are N11 • W and N79 • E oriented, respectively, is compatible with the right-lateral kinematics of the E-W shear zone with a transpressional component. In addition, it is similar to the neotectonic stress-field (Shmax: NW-SE; Shmin: NE-SW) inferred from other authors (e.g., Hiruma et al [60]; Riccomini et al [10,22]; Fernandes and Amaral [44]; Santos and Ladeira [70]; Silva and Mello [71]; Pinheiro and Queiroz Neto [72]; Pinheiro et al [58]; Giro et al [63]; Brêda et al [62]; and Silva et al [73]) for many sectors of south and southeast Brazil. This suggests that the computed stress may reasonably relate to Cenozoic tectonics, and possibly to neotectonics.…”
Section: Discussionsupporting
confidence: 87%
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