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Constraining the strain ellipsoid and deformation parameters using deformed single layers: A computational approach assuming pure shear and isotropic volume change
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
2014 (English)In: Journal of Structural Geology, ISSN 0191-8141, E-ISSN 1873-1201, Vol. 62, 194-206 p.Article in journal (Refereed) Published
Abstract [en]

If the deformation history of individual layers in a deformed rock mass can be appropriately analysed and categorised then the surface of no elongation (snoe) and the surface of no infinitesimal elongation (snoie) may be identified. A computational approach to automatically identify the polar snoe and snoie is presented and tested on synthetic and natural examples. Additionally the equations that allow extraction of parameter values, which quantify the deformation, are derived here. Two fundamental assumptions are made: 1) the progressive deformation is pure shear and 2) the associated volume change is isotropic. The proposed method is tested using data generated from known deformation sequences and is found to work reasonably well. However, as is the case with most methods of analysis, suitable data with a wide range of orientations is required for reliable results.

Place, publisher, year, edition, pages
2014. Vol. 62, 194-206 p.
National Category
Geology
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
Identifiers
URN: urn:nbn:se:uu:diva-241083DOI: 10.1016/j.jsg.2014.02.002ISI: 000351251300014OAI: oai:DiVA.org:uu-241083DiVA: diva2:777602
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2017-12-05Bibliographically approved

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Talbot, Christopher J.

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