A study of white mica microstructure and microchemistry in a low grade mylonite.

Behrmann, Jan H. (1984) A study of white mica microstructure and microchemistry in a low grade mylonite. Open Access Journal of Structural Geology, 6 (3). pp. 283-292. DOI 10.1016/0191-8141(84)90052-X.

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Abstract

A suite of mylonites rich in white mica, taken from the Betic Movement Zone (Sierra Alhamilla, Spain) shows progressive grain refinement involving a two-stage recrystallization history. Stage one is isochemical and possibly works by nucleation and growth of new crystals at sites of fracture and dilatancy. Stage two is nonisochemical and may be driven by differences in strain energy and chemical free energy between the two phases. Deformation is probably governed by brittle fracture and diffusional mass transfer along grain boundaries and cracks. The two stages of recrystallization are thought to represent a single progressive episode of deformation under changing metamorphic conditions.

Document Type: Article
Keywords: Mylonite, microstructure, microchemistry, Betic Movement Zone, Sierra Alhamilla, Spain
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/0191-8141(84)90052-X
ISSN: 0191-8141
Date Deposited: 07 Feb 2013 11:33
Last Modified: 17 Jan 2018 09:58
URI: http://oceanrep.geomar.de/id/eprint/19470

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