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Manganese-rich olivines: Identification from spectral reflectance properties

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Manganese-rich olivines; Identification from spectral reflectance properties.pdf (503.3Kb)

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Author

Cloutis, Edward A.

Uri

http://hdl.handle.net/10680/1397

Date

1997-11-25

Doi

10.1029/97JE02497

Citation

Cloutis, E. A. "Manganese-rich olivines: Identification from spectral reflectance properties." Journal of Geophysical Research 102 (1997): 25,575-25,580. DOI: 10.1029/97JE02497.

Abstract

Reflectance spectra of manganese-rich olivines were examined to determine which spectral features allow these minerals to be distinguished from forsteritic-fayalitic olivines. The results indicate that manganese-rich olivines can be distinguished on the following bases: Fe2+ M2 absorption band depths are reduced relative to Fe2+ Ml depths, the wavelength position of the Fe2+M2 absorption band is shifted to longer wavelengths(>1.08 μm) for olivines containing between ~10 and 70 mol % Mn2Si04 , and the presence of an isolated Mn2+ transition band near 0.4 μm . The absence of Fe2+ spin forbidden features in the visible wavelength region is not a reliable method for identifying manganese-rich olivines.

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