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Shock-produced olivine glass - First observationTransmission electron microscope (TEM) observations of an experimentally shock-deformed single crystal of natural peridot, /Mg(0.88)Fe(0.12)/2SiO4, recovered from peak pressures of about 56 billion 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 billion pascals and that further TEM observations of naturally shocked olivines may demonstrate the presence of glass.
Document ID
19780034366
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jeanloz, R.
(California Inst. of Tech. Pasadena, CA, United States)
Ahrens, T. J.
(California Institute of Technology Pasadena, Calif., United States)
Lally, J. S.
(United States Steel Research Laboratory Monroeville, Pa., United States)
Nord, G. L., Jr.
(U.S. Geological Survey Reston, Va., United States)
Christie, J. M.
(California, University Los Angeles, Calif., United States)
Heuer, A. H.
(Case-Western-Reserve University Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
July 29, 1977
Publication Information
Publication: Science
Volume: 197
Subject Category
Chemistry And Materials (General)
Accession Number
78A18275
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-105
CONTRACT_GRANT: NAS9-14749
Distribution Limits
Public
Copyright
Other

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