Glass microbeads in analog models of thrust wedges.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorD’Angelo, Taynara-
Autor(es): dc.creatorGomes, Caroline Janette Souza-
Data de aceite: dc.date.accessioned2025-08-21T15:26:29Z-
Data de disponibilização: dc.date.available2025-08-21T15:26:29Z-
Data de envio: dc.date.issued2017-10-02-
Data de envio: dc.date.issued2017-10-02-
Data de envio: dc.date.issued2017-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/8837-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/0001-3765201720160291-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1014816-
Descrição: dc.descriptionGlass microbeads are frequently used in analog physical modeling to simulate weak detachment zones but have been neglected in models of thrust wedges. Microbeads differ from quartz sand in grain shape and in low angle of internal friction. In this study, we compared the structural characteristics of microbeads and sand wedges. To obtain a better picture of their mechanical behavior, we determined the physical and frictional properties of microbeads using polarizing and scanning electron microscopy and ring-shear tests, respectively. We built shortening experiments with different basal frictions and measured the thickness, slope and length of the wedges and also the fault spacings. All the microbeads experiments revealed wedge geometries that were consistent with previous studies that have been performed with sand. However, the deformation features in the microbeads shortened over low to intermediate basal frictions were slightly different. Microbeads produced different fault geometries than sand as well as a different grain flow. In addition, they produced slip on minor faults, which was associated with distributed deformation and gave the microbeads wedges the appearance of disharmonic folds. We concluded that the glass microbeads may be used to simulate relatively competent rocks, like carbonates, which may be characterized by small-scale deformation features.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsOs trabalhos publicados no periódico Anais da Academia Brasileira de Ciências, exceto onde identificado, está sob uma licença Creative Commons que permite copiar, distribuir e transmitir o trabalho desde que sejam citados o autor e o licenciante. Fonte: Anais da Academia Brasileira de Ciências <http://www.scielo.br/scielo.php?script=sci_serial&pid=0001-3765&lng=en&nrm=iso>. Acesso em: 23 jan. 2020.-
Palavras-chave: dc.subjectCompressional deformation models-
Palavras-chave: dc.subjectSand-
Palavras-chave: dc.subjectMicrobeads-
Título: dc.titleGlass microbeads in analog models of thrust wedges.-
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