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Shock-Produced Olivine Glass: First Observation

Jeanloz, Raymond and Ahrens, Thomas J. and Lally, J. S. and Nord, G. L., Jr. and Christie, J. M. and Heuer, A. H. (1977) Shock-Produced Olivine Glass: First Observation. Science, 197 (4302). pp. 457-459. ISSN 0036-8075. doi:10.1126/science.197.4302.457.

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Transmission electron microscope (TEM) observations of an experimentally shock-deformed single crystal of natural peridot, (Mg_(0.88)Fe_(0.12))_2SiO_4, recovered from peak pressures of about 56 x 10^9 pascals revealed the presence of amorphous zones located within crystalline regions with a high density of tangled dislocations. This is the first reported observation of olivine glass. The shocked sample exhibits a wide variation in the degree of shock deformation on a small scale, and the glass appears to be intimately associated with the highest density of dislocations. This study suggests that olivine glass may be formed as a result of shock at pressures above about 50 to 55 x 10^9 pascals and that further TEM observations of naturally shocked olivines may demonstrate the presence of glass.

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Additional Information:© 1977 American Association for the Advancement of Science. Received 24 March 1977; revised 25 April 1977. We are grateful for discussions with I. Jackson and L. Liu, and for reviews from A. Albee and D. Grady, all of which were very helpful. This research was supported by NASA grant NGL 05-002-105 and contract NAS9-14749 (U.S. Steel Research Laboratory). Contribution No. 2889, Division of Geological and Planetary Sciences, California Institute of Technology.
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NASANGL 05-002-105
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Caltech Division of Geological and Planetary Sciences2889
Issue or Number:4302
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Official Citation:Shock-Produced Olivine Glass: First Observation RAYMOND JEANLOZ, THOMAS J. AHRENS, J. S. LALLY, G. L. NORD JR., J. M. CHRISTIE, and A. H. HEUER Science 29 July 1977: 197 (4302), 457-459. [DOI:10.1126/science.197.4302.457]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59069
Deposited By: Tony Diaz
Deposited On:29 Jul 2015 21:17
Last Modified:10 Nov 2021 22:14

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