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Deformation of experimentally shocked biotite

Horz, Friedrich and Ahrens, Thomas J. (1969) Deformation of experimentally shocked biotite. American Journal of Science, 267 (10). pp. 1213-1229. ISSN 0002-9599. doi:10.2475/ajs.267.10.1213.

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Shock experiments (10-40 kb) on lepidomelane show that kinking occurs at pressures as low as 9 kb; the intensity is related to peak pressure and shock pulse duration (0.7-0.3µ sec.), and is produced by shocks propagated along [hk0] and not along [001]. The shock-induced kinks have a wider range of their angle of external rotation (19-121°) than their static counterparts (40-60°). The ratio of the kink angles, ε and δ, scatters widely, indicating shock induced kinking is highly asymmetrical. A marked decrease of 2V from 24 to 7° with increasing pressure is observed. Laue transmission patterns show that permanent angular rotations as great as 4.4° are induced by shock pressures of 37.5 kb. In individual samples the increase in permanent angular rotations and decrease in 2V can be closely correlated.

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Additional Information:© 1969 American Journal of Science. This research was supported by NASA Grant NGR-05-002-105. We appreciate the assistance of J. Lower and D. Tanner in performing the experiments. We thank E. C. T. Chao for providing the sample material, A. Albee for his microprobe analysis, and P. Duwez for the use of his X-ray facilities. Comments from N. L. Carter, D. Cummings, and I. Borg were most helpful.
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Caltech Division of Geological Sciences1600
Issue or Number:10
Record Number:CaltechAUTHORS:20151120-132936753
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Official Citation:Friedrich Horz and Thomas J. Ahrens Deformation of experimentally shocked biotite Am J Sci December 1, 1969 267:1213-1229; doi:10.2475/ajs.267.10.1213
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62293
Deposited By: Tony Diaz
Deposited On:23 Nov 2015 19:40
Last Modified:10 Nov 2021 23:00

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