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DEFORMATION MECHANISMS IN MILDLY SHOCKED CHONDRITIC DIOPSIDE
Author(s) -
Ashworth J.R.
Publication year - 1980
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1980.tb00514.x
Subject(s) - chondrite , crystal twinning , diopside , pyroxene , shock (circulatory) , slip (aerodynamics) , deformation (meteorology) , meteorite , transmission electron microscopy , geology , shock metamorphism , mineralogy , materials science , olivine , composite material , astrobiology , physics , thermodynamics , microstructure , nanotechnology , medicine
In several ordinary chondrites showing slight shock deformation, the shock effects in diopsidic pyroxene have been characterized, using transmission electron microscopy. Narrow twin lamellae, and slip planes, in (100) orientation are abundant. These are comparable with the effects of experimental deformation at low strain‐rates. The absence of (001) twinning indicates different conditions from those in shock experiments and in many natural shock events. Predominance of the (100) features is thought to indicate a particularly mild type of shock, in which the stresses generated within a crystal are low.