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Rheology of ice II and ice III from high-pressure extrusion

Echelmeyer, Keith and Kamb, Barclay (1986) Rheology of ice II and ice III from high-pressure extrusion. Geophysical Research Letters, 13 (7). pp. 693-696. ISSN 0094-8276. doi:10.1029/GL013i007p00693.

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Rheological parameters for ice II and ice III, needed in tectonic models of the icy satellites of the major planets, are obtained from extrusion experiments and compared with the rheology of ice I at pressures ∼2 kbar and temperatures ∼240K. Ice II has a higher effective viscosity (by a factor ∼10) than ice I at similar stress levels, whereas ice III has a lower viscosity (by a factor ∼0.01). The Rheological contrasts among the ice phases are related to differences in the dielectric relaxation behavior and state of proton order/disorder in the structures in a way that sheds light on the nature of dislocation motion in ice. A striking transformation plasticity accompanies the ice I-III transition and could have large tectonic effects.

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Additional Information:© 1986 by the American Geophysical Union. Received May 2, 1986; accepted May 21, 1986. Paper number 6L6981.
Issue or Number:7
Record Number:CaltechAUTHORS:20140915-122910956
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Official Citation:Rheology of Ice II and Ice III from High-Pressure Extrusion (pages 693–696) Keith Echelmeyer and Barclay Kamb DOI: 10.1029/GL013i007p00693
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49709
Deposited By: Ruth Sustaita
Deposited On:15 Sep 2014 21:11
Last Modified:10 Nov 2021 18:47

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