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Shock Re-equilibration of Fluid InclusionsFluid inclusions (microscopic volumes of fluid trapped within minerals as they precipitate) are extremely common in terrestrial minerals formed under a wide range of geological conditions from surface evaporite deposits to kimberlite pipes. While fluid inclusions in terrestrial rocks are nearly ubiquitous, only a few fluid inclusion-bearing meteorites have been documented. The scarcity of fluid inclusions in meteoritic materials may be a result of (a) the absence of fluids when the mineral was formed on the meteorite parent body or (b) the destruction of fluid inclusions originally contained in meteoritic materials by subsequent shock metamorphism. However, the effects of impact events on pre-existing fluid inclusions trapped in target and projectile rocks has received little study. Fluid inclusions trapped prior to the shock event may be altered (re-equilibrated) or destroyed due to the high pressures, temperatures, and strain rates associated with impact events. By examining the effects of shock deformation on fluid inclusion properties and textures we may be able to better constrain the pressure-temperature path experienced by terrestrial and meteoritic shocked materials and also gain a clearer understanding of why fluid inclusions are rarely found in meteorite samples.
Document ID
20040058076
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Madden, M. E. Elwood
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Horz, F.
(NASA Johnson Space Center Houston, TX, United States)
Bodnar, R. J.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Lunar and Planetary Science XXXV: Effects of Impacts: Shock and Awe
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NSF EAR-0125918
Distribution Limits
Public
Copyright
Public Use Permitted.
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