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Detalhes Referência

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble

Participantes na publicação
V. K. Kusbach (Author)
M. Machek (Author)
Z. Roxerová (Author)
M. Racek (Author)
P. F. Silva (Author)
Dep. Engenharia Geográfica, Geofísica e Energia
IDL

Resumo
Anisotropy of magnetic susceptibility (AMS) is regularly applied as a tool to infer structural analysis\nof deformation and flow in rocks, particularly, with low anisotropy. AMS integrates the magnetic\nsignature of crystallographic and shape preferred orientation of all mineral grains present in the rock\nmicrostructure. Those preferred orientations result from multiple processes affecting the rock during\nits evolution, therefore the desirable AMS-strain relationship is not straightforward. Here we show\nthat due to localization of deformation, AMS is indirectly dependent on the magnitude and character\nof deformation. In order to decipher the AMS-strain relationship, AMS studies should be accompanied\nby microstructural analyses combined with numerical modelling of magnetic fabric. A small-scale\nshear zone produced by single deformation event was studied. The resultant AMS fabric is “inverse”\ndue to the presence of Fe-dolomite and controlled by calcite and dolomite crystallographic preferred\norientations. The localized deformation resulted in the angular deviation between macroscopic and\nmagnetic fabric in the shear zone, systematically increasing with increasing strain. This is a result of the\npresence of microstructural subfabrics of coarse porphyroclasts and fine-grained recrystallized matrix\nproduced by localization.The localization of deformation is a multiscale and widespread process that\nshould be considered whenever interpreting AMS in deformed rocks and regions.

Data de Publicação
2019-11-25

Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
Scientific Reports

Identificadores da Publicação
ISSN - 2045-2322

Editora
Springer Science and Business Media LLC

Volume
9
Fascículo
1

Identificadores do Documento
DOI - https://doi.org/10.1038/s41598-019-53794-y
URL - http://dx.doi.org/10.1038/s41598-019-53794-y


Exportar referência

APA
V. K. Kusbach, M. Machek, Z. Roxerová, M. Racek, P. F. Silva, (2019). Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble. Scientific Reports, 9, ISSN 2045-2322. eISSN . http://dx.doi.org/10.1038/s41598-019-53794-y

IEEE
V. K. Kusbach, M. Machek, Z. Roxerová, M. Racek, P. F. Silva, "Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble" in Scientific Reports, vol. 9, 2019. 10.1038/s41598-019-53794-y

BIBTEX
@article{45856, author = {V. K. Kusbach and M. Machek and Z. Roxerová and M. Racek and P. F. Silva}, title = {Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble}, journal = {Scientific Reports}, year = 2019, volume = 9 }