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    Discussion of 'Metamorphic P - T and retrograde path of high-pressure Barrovian metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland'

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    Fulltext not available
    Authors
    Aoki, K.
    Maruyama, S.
    Oliver, G.
    Omori, S.
    Viete, D.
    Wilde, Simon
    Windley, B.
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Aoki, K. and Maruyama, S. and Oliver, G. and Omori, S. and Viete, D. and Wilde, S. and Windley, B. 2014. Discussion of 'Metamorphic P - T and retrograde path of high-pressure Barrovian metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland'. Geological Magazine.. 151 (4): pp. 755-763.
    Source Title
    Geological Magazine.
    DOI
    10.1017/S001675681300099X
    ISSN
    0016-7568
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/62145
    Collection
    • Curtin Research Publications
    Abstract

    K. Aoki, B. F. Windley, S. Maruyama & S. Omori reply: First, we thank Viete, Oliver & Wilde for their interesting and thought-provoking comments on the timing of the high-pressure granulite facies (HGR) metamorphism recorded in metamorphic rocks at Cairn Leuchan, Scotland, published by Aoki et al. (2013). Based on new metamorphic data of garnetites and garnet-amphibolites at Cairn Leuchan and new zircon U-Pb ages of amphibolitized eclogite at Tomatin, we suggested in our publication that the HGR metamorphism was retrograde after eclogite facies before the c. 470 Ma 'Barrovian metamorphism'. Viete, Oliver & Wilde however speculate that the HGR metamorphism at Cairn Leuchan may have occurred at c. 1000 Ma, as a result of their new U-Pb zircon age of the Cowhythe Gneiss at Portsoy and from previous studies of the geological structure and geochronology. We are grateful for this opportunity to describe, albeit in a preliminary manner, our new understanding and tectonic model of the Caledonian orogen in Scotland and western Ireland of which the Barrovian metamorphism is a key component. A reply to a comment is not the correct place to propose an entirely new paradigm for such a classic orogen, but we will present our model more fully in a future publication.. Copyright © Cambridge University Press 2014.

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