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Title: Sheared-bedding parallel quartz vein as an indicator of deformation processes.
Authors: Barbosa, Paola Ferreira
Lagoeiro, Leonardo Evangelista
Keywords: Quartz vein
Dynamic recrystallization
Quadrilátero Ferrífero
Issue Date: 2012
Citation: BARBOSA, P. F.; LAGOEIRO, L. E. Sheared-bedding parallel quartz vein as an indicator of deformation processes. Tectonophysics, Amsterdam, v. 564-565, p. 101-113, 2012. Disponível em: <>. Acesso em: 30 set. 2014.
Abstract: Monomineralic veins are well known as good recording of filling and precipitation processes. However, they are also able to register the action of deformation in rocks. We used monomineralic, quartz veins from Quadriláterro Ferrífero, Brazil, to represent how the deformation actuated during the transformation of different structures. They were analyzed using a combination of a u-stage and EBSD. Two main types of quartz aggregates are distinguished: single crystals with subgrain development and strain-free grains of quartz. We interpret the microstructures and textures as the result of a combination of concurrent crystal plasticity, microfracturing, solution transfer and recrystallization. The single quartz grains were deformed by dislocation glide. However, as the c-axis orientation of the grain was not favorable for further glide on basal planes, the deformation was accommodated by microfracturing. New grains were formed along the deformed zones with crystallographic orientations suitable for gliding on basal planes. As the deformation proceeded, the new grains continue to develop until the vein was completely recrystallized into an aggregate of granular grains.
ISSN: 0040-1951
metadata.dc.rights.license: O periódico Tectonophysics concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3481460269681.
Appears in Collections:DEGEO - Artigos de periódicos

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