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Book Chapter

Microstructures in deforming–reactive systems

By
Bruce E. Hobbs
Bruce E. Hobbs
Centre for Exploration Targeting, School of Earth and Environment, The University of Western Australia, Perth, 6009, AustraliaCSIRO Earth Science and Resource Engineering, Perth, Western Australia, Perth 6102, Australia
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Alison Ord
Alison Ord
Centre for Exploration Targeting, School of Earth and Environment, The University of Western Australia, Perth, 6009, Australia
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Published:
January 01, 2011

Abstract

The inter-relationships between mineral reactions and deformation are explored with a view to understanding the development of certain mineral foliations and lineations. The following arguments are presented: (i) the processes involved during mineral reactions in deforming metamorphic rocks are described by coupled reaction–diffusion–deformation equations; (ii) these reactions can become unstable producing compositional patterning in both space (metamorphic differentiation) and time (compositional zoning); (iii) the patterns (foliations and mineral lineations) that result from coupled reaction–diffusion–deformation equations are described by surfaces that approximate minimal surfaces (surfaces of zero mean curvature) and an example of such geometry is given; and (iv) the foliations and mineral lineations that form by such processes are controlled by the evolution of the kinematics of the deformation history and not by the finite strain tensor.

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Contents

Geological Society, London, Special Publications

Deformation Mechanisms, Rheology and Tectonics: Microstructures, Mechanics and Anisotropy

David J. Prior
David J. Prior
University of Otago, New Zealand
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Ernest H. Rutter
Ernest H. Rutter
University of Manchester, UK
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Daniel J. Tatham
Daniel J. Tatham
University of Liverpool, UK
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Geological Society of London
Volume
360
ISBN electronic:
9781862394483
Publication date:
January 01, 2011

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