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Thermal Emission Spectrometer Mosaics of Impact Craters: Progress on Shocked Plagioclase Detections

Authors :
Johnson, J. R
Staid, M. I
Titus, T. N
Gaddis, L
Source :
Lunar and Planetary Science XXXIV.
Publication Year :
2003
Publisher :
United States: NASA Center for Aerospace Information (CASI), 2003.

Abstract

High shock pressures disorder the mineral lattice of plagioclase feldspars and cause weakening and shifts in thermal infrared absorption bands related to an increase in diaplectic glass content, particularly at shock pressures above ~20-25 GPa [1- 9]. We are continuing our investigation of spectral deconvolutions of TES mosaics and mosaics using standard TES orbits for eight impact crater areas. Using a combination of mineral laboratory spectra and spectra of experimentally shocked bytownite feldspars [5] to deconvolve the TES spectra, we find that locations of shocked feldspar detections are not restricted to ejecta near large craters.

Subjects

Subjects :
Geosciences (General)

Details

Language :
English
Database :
NASA Technical Reports
Journal :
Lunar and Planetary Science XXXIV
Publication Type :
Report
Accession number :
edsnas.20030111188
Document Type :
Report