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Lamellar olivine in the Divnoe achondrite: Evidence for high-pressure exsolution?The olivine-rich Divnoe achondrite contains numerous large olivine grains which have a lamellar or banded appearance in back-scattered electron images, caused by minor compositional differences. One such grain, viewed in transmitted light, displays a system of lamellae with the same orientation and scale as the compositional banding. The only process known to produce such structure and chemical variability in olivine grains is high-pressure transformations between alpha-, beta- and gamma-olivines, but in other meteorites and in experimental products the structure is approximately 100 times finer than the Divnoe lamella.
Document ID
19940016206
Document Type
Conference Paper
Authors
Petaev, M. I. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z
Subject Category
INORGANIC AND PHYSICAL CHEMISTRY
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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