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    Replacement processes in the earth's crust

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    Authors
    Putnis, Andrew
    John, T.
    Date
    2010
    Type
    Journal Article
    
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    Citation
    Putnis, A. and John, T. 2010. Replacement processes in the earth's crust. Elements: an international magazine of mineralogy, geochemistry, and petrology. 6 (3): pp. 159-164.
    Source Title
    Elements: an international magazine of mineralogy, geochemistry, and petrology
    DOI
    10.2113/gselements.6.3.159
    ISSN
    1811-5209
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/23704
    Collection
    • Curtin Research Publications
    Abstract

    Afundamental question in metamorphism is: What is the mechanism that converts one mineral assemblage into another in response to a change in the physical and/or chemical environment? The fact that aqueous fluids must be involved in such large-scale re-equilibration has been demonstrated by petrological, mineralogical, micro-structural and isotopic data. Fluid-mineral reactions take place by dissolution-precipitation processes, but converting one rock into another requires pervasive transport of reactive fluid through the entire rock. The generation of reaction-induced porosity and the spatial and temporal coupling of dissolution and precipitation can account for fluid and element transport through rocks and the replacement of one mineral assemblage by another.

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