Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/3878
Title: Nucleation and growth of new grains in recrystallized quartz vein : an example from banded iron formation in Iron Quadrangle, Brazil.
Authors: Lagoeiro, Leonardo Evangelista
Barbosa, Paola Ferreira
Keywords: Crystallographic orientation
Universal stage
Electron backscatter diffraction
Recrystallization
Quartz
Issue Date: 2010
Citation: LAGOEIRO, L. E.; BARBOSA, P. F. Nucleation and growth of new grains in recrystallized quartz vein : an example from banded iron formation in Iron Quadrangle, Brazil. Journal of Structural Geology, p. XX, 2010. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0191814110000416>. Acesso em: 30 set. 2014.
Abstract: Intracrystalline microcracks developed in quartz single crystals deformed in greenschist metamorphic conditions. A detailed study of samples collected in tabular to lens shape quartz vein was carried out to investigate how the microcracks initiated and how the microstructures evolved with the progressive deformation. A combination of light and EBSD (electron backscatter diffraction) techniques was used to analyze the microstructures and determine the crystallographic orientation of quartz grains. The crystallographic orientations of microcracks indicate that they might have initiated parallel to the direction of one of the rhombohedral planes of the host crystals. It is suggested that new grains nucleated by rotation of broken fragments from the host grains. c-axes the of host are distributed in a small-circle close to the foliation plane while the c-axes of the new grains in microcracks are more scattered when compared with the host orientations. New grains grew with their c-axes approximately perpendicular to the shortening direction.
URI: http://www.repositorio.ufop.br/handle/123456789/3878
metadata.dc.identifier.doi: https://doi.org/10.1016/j.jsg.2010.03.007
ISSN: 0191-8141
metadata.dc.rights.license: O periódico Journal of Structural Geology concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3481460197761.
Appears in Collections:DEGEO - Artigos de periódicos

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