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Science 19 January 1979:
Vol. 203. no. 4377, pp. 261 - 263
DOI: 10.1126/science.203.4377.261
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Articles

Activation Volume for Creep in the Upper Mantle

JOHN V. ROSS 1, HANS G. AVE'LALLEMANT 2, and NEVILLE L. CARTER 3

1 Department of Geological Sciences, University of British Columbia, Vancouver, Canada V6T 1W5
2 Department of Geology, Rice University, Houston, Texas 77001
3 Department of Earth and Space Sciences, State University of New York, Stony Brook 11794

The activation volume for creep, V*, of olivine-rich rocks has been determined in pressure-differential creep experiments on dunite at temperatures from 1100° to 1350°C and confining pressures from 5 to 15 kilobars. Values of V* range from 10.6 to 15.4 cubic centimeters per mole with a mean value of 13.4 cubic centimeters per mole, near that expected for oxygen ion self-diffusion. The quantity V* is incorporated into existing flow equations; in combination with observations on naturally deformed mantle xenoliths, estimates are given of the variation with depth of stress, strain rate, and viscosity.

Submitted on February 3, 1978
Revised on July 11, 1978


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Deformation of olivine at mantle pressure using the D-DIA.
L. LI, D. WEIDNER, P. RATERRON, J. CHEN, M. VAUGHAN, S. MEI, and B. DURHAM (2006)
European Journal of Mineralogy 18, 7-19
   Abstract »    Full Text »    PDF »
Rheology of the Upper Mantle: A Synthesis.
S.-i. Karato, S.-i. Karato, and P. Wu (1993)
Science 260, 771-778
   Abstract »    PDF »


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