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Raman Spectroscopic Characterization of the Feldspars: Implications for Surface Mineral Characterization in Planetary ExplorationThe availability in the last decade of improved Raman instrumentation using small, stable, intense lasers, sensitive CCD array detectors, and advanced fast grating systems enabled us to develop the Mars Microbeam Raman Spectrometer (MMRS), a field-portable Raman spectrometer with precision and accuracy capable of identifying minerals and their different compositions. For example, we can determine Mg cation ratios in pyroxenes and olivines to +/-0.1 on the basis of Raman peak positions. Feldspar is another major mineral formed in igneous systems whose characterization is important for determining rock petrogenesis and alteration. From their Raman spectral pattern, feldspars can be readily distinguished from ortho- and chain-silicates and from other tecto-silicates such as quartz and zeolites. We show here how well Raman spectral analysis can distinguish among members within the feldspar group.
Document ID
20030111413
Document Type
Conference Paper
Authors
Freeman, J. J. (Washington Univ. Saint Louis, MO, United States)
Wang, Alian (Washington Univ. Saint Louis, MO, United States)
Kuebler, K. E. (Washington Univ. Saint Louis, MO, United States)
Haskin, L. A. (Washington Univ. Saint Louis, MO, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-10703
CONTRACT_GRANT: NAG5-12114
Distribution Limits
Public
Copyright
Public Use Permitted.

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