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Visible/Near-Infrared Spectra of Experimentally Shocked Plagioclase FeldsparsMinerals subjected to high shock pressures exhibit structural changes with increasing pressure (e.g., fractures, deformations, formation of diaplectic glass, and complete melting [1-6]). Petrologic and thermal infrared spectroscopic studies have shown that diaplectic glass (maskelynite) formation in feldspars occurs between ~25-45 GPa, while significant melting occurs above ~45 GPa [7- 12]. Past studies of visible/near-infrared spectra of shocked plagioclase feldspars demonstrated few variations in spectral features with pressure except for a decrease in the absorption feature near 1250 nm and an overall decrease in albedo [13-17]. We report new visible/near-infrared spectra of albite- and anorthiterich rocks experimentally shocked from 17-56 GPa.
Document ID
20030110628
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Johnson, J. R.
(Geological Survey Flagstaff, AZ, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Geosciences (General)
Funding Number(s)
CONTRACT_GRANT: NAG5-3871
CONTRACT_GRANT: NASA Order W-10037
Distribution Limits
Public
Copyright
Public Use Permitted.
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