Newtonian Dislocation Creep in Quartzites: Implications for the Rheology of the Lower Crust
- 26 August 1994
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 265 (5176) , 1204-1206
- https://doi.org/10.1126/science.265.5176.1204
Abstract
Mechanical and microstructural evidence indicates that a natural and a synthetic quartzite deformed by Newtonian dislocation (Harper-Dorn) creep at temperatures higher than 1073 K and stresses lower than 300 megapascals. The observation of this creep in these materials suggests that the lower crust may flow like a Newtonian viscous fluid by a dislocation mechanism at stresses much smaller than those previously postulated.Keywords
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