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<identifier>oai:HAL:hal-00565749v1</identifier>
<datestamp>2018-01-11</datestamp>
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<title lang=en>Predicting seismic properties from three-dimensional microstructures - a new look at an old quartzite</title>
<creator>Lloyd, Geoffrey E.</creator>
<creator>Law, R.D.</creator>
<creator>MAINPRICE, David</creator>
<contributor>Institute of Geophysics and Tectonics, The University of Leeds ; Université du Québec</contributor>
<contributor>Department of Geosciences, Virginia Tech., , Blacksburg ; Université du Québec</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>Continental Tectonics and Mountain Building: The Legacy of Peach and Horne</source>
<contributor>Law R.D.; Butler W. H.; Holsworth R. E.; Krabbendam M.; Strachan R.</contributor>
<publisher>Geological Society of London</publisher>
<identifier>hal-00565749</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00565749</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00565749</source>
<source>Law R.D.; Butler W. H.; Holsworth R. E.; Krabbendam M.; Strachan R. Continental Tectonics and Mountain Building: The Legacy of Peach and Horne, Geological Society of London, pp.603-622, 2010, Geological society Special publication, 335</source>
<language>en</language>
<subject lang=ro>microstructural process</subject>
<subject lang=ro>fault rock evolution</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/bookPart</type>
<type>Book sections</type>
<description lang=en>The mylonitic Cambrian quartzites, Moine Thrust Zone, NW Scotland, have long been used to study microstructural and petrofabric evolution and to develop understanding of grain-scale processes accommodating large-scale displacements. Today, structural geology is entering a new age of understanding of the basic processes involved in microstructural evolution due to the emergence of novel instrumental techniques and theoretical models. It seems apposite therefore to re-evaluate the microstructure of one example of this classic quartz mylonite from the Stack of Glencoul, Assynt, using arguably the most important of these new techniques, electron backscattered diffraction (EBSD). The three-dimensional (3D) microstructure and petrofabric of this rock was analysed using EBSD, to: 1) corroborate previous optical and X-ray texture goniometry measurements; 2) investigate the potential for sampling and/or tectonic sectioning bias that may be introduced inadvertently into any petrofabric analysis; and 3) predict its seismic properties. It is found that microstructures do differ between orthogonal structural sections, leading to variations in strengths of different components in the overall petrofabric that might impact on seismic properties. The results emphasize the true 3D nature of microstructures and petrofabrics, which can be recognized and accommodated more readily by this new generation of analytical techniques.</description>
<date>2010-02-14</date>
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