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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Tectonophysicsarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Tectonophysics
Article . 2018 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Basement control on fault formation and deformation band damage zone evolution in the Rio do Peixe Basin, Brazil

Authors: Renata E.B. Araujo; Francisco H.R. Bezerra; Francisco C.C. Nogueira; Fabrizio Balsamo; Bruno R.B.M. Carvalho; Jorge A.B. Souza; Julio C.D. Sanglard; +2 Authors

Basement control on fault formation and deformation band damage zone evolution in the Rio do Peixe Basin, Brazil

Abstract

Abstract The objective of this study is to analyze the influence of brittle reactivations of continental-scale Precambrian ductile shear zones on the evolution of deformation band damage zones. Our results indicate that the Rio do Peixe Basin was formed by the Cretaceous reactivation of its basement EW- and NE-SW-striking major fault segments. These fault segments are composed of a footwall with Precambrian crystalline mylonites and a hanging wall with Cretaceous fine to coarse sandstones. In the hanging wall, deformation bands occur in poorly sorted, fine to very coarse sandstones. These deformation bands occur as single bands or clusters mostly within damage zones ~84 m from the basement faults and are widespread in structural highs. Our data plot slightly above the medium fault displacement vs. the damage zone width solution but falls within the point cloud of global patterns. The slip surfaces strike EW and NE-SW and are parallel or slightly oblique to the basement rift faults. The kinematics of slip surfaces are consistent with those of the reactivated basement faults. In addition, a logarithmic decrease in deformation band frequency occurs away from the basement slip surface. The deformation band frequencies peak close to the fault core with values as high as 22–48 bands/m. The lithology grain size also influences deformation as clusters of deformation bands and slip surfaces are only observed in coarse sandstones. This new case of deformation bands in damage zones of basement faults is characterized by a strong attitude and geometric and kinematic inheritance but follows the deformation band frequency of global patterns.

Country
Italy
Keywords

Damage zone, Rio do Peixe Basin, 550, Deformation band, Brittle shear zone reactivation, Rift evolution

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
42
Top 10%
Top 10%
Top 10%
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