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Finite-element models of continental extensionNumerical models of the initial deformation of extending continental lithosphere, computed to investigate the control of preexisting thermal and mechanical heterogeneities on the style of deformation, are presented. The finite element method is used to calculate deformation with a viscoelastic-plastic model for the lithosphere. Comparisons of the results of analytic models and finite-element models using this method show that good results may be obtained by the numerical technique, even with elements containing both brittle and viscoelastic sampling points. It is shown that the gross style of initial extensional deformation is controlled by the depth and width of the initial heterogeneity which localizes deformation.
Document ID
19910028303
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lynch, H. David
(New Mexico State University Las Cruces; Lunar and Planetary Institute, Houston, TX, United States)
Morgan, Paul
(Northern Arizona University Flagstaff, AZ; Lunar and Planetary Institute, Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Tectonophysics
Volume: 174
ISSN: 0040-1951
Subject Category
Geophysics
Accession Number
91A12926
Funding Number(s)
CONTRACT_GRANT: NASW-3389
Distribution Limits
Public
Copyright
Other

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