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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

TITLE: Olivine KI3054 Fo66 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: KI3054

MINERAL_TYPE: Nesosilicate

MINERAL: Olivine (Olivine group)

FORMULA: Mg2SiO4-Fe2SiO4 Fo66

FORMULA_HTML: Mg2Si4-Fe2SiO4 Fo66

COLLECTION_LOCALITY: Kiglapait intrusive, Labrador

ORIGINAL_DONOR: S.A. Morse, University of Massachusetts, Amherst

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Sample has been subjected to Franz Isodynamic Magnetic Separator, heavy liquid (Clerici) separation and hand-picking. Mineral separated is 100% pure olivine. Samples sieved to less than 60µm, prior to spectral characterization. Sample (fo66) is part of a of solid solution suite of Kiglapait samples.

King, T.V.V. and W.I. Ridley, 1987, Relation of the Spectroscopic Reflectance of Olivine to Mineral Chemistry and Some Remote Sensing Implications. J. Geophys. Res., 11,457-11,469.

IMAGE_OF_SAMPLE:
NO PHOTO

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Not Available

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: EPMA # XRF, EPMA, ICP(Trace), WChem


COMPOSITION
KEYWORD		 Oxide
ASCII		 Amount Weight
Percent, %		 Oxide
html
COMPOSITION: SiO2 36.30 wt% SiO2
COMPOSITION: TiO2 0.03 wt% TiO2
COMPOSITION: Cr2O3 0.03 wt% Cr2O3
COMPOSITION: FeO 30.59 wt% FeO
COMPOSITION: NiO 0.09 wt% NiO
COMPOSITION: MnO 0.05 wt% MnO
COMPOSITION: MgO 32.62 wt% MgO
COMPOSITION: CaO 0.04 wt% CaO
COMPOSITION: Total 99.75 wt%
COMPOSITION: O=Cl,F,S wt% #correction for Cl, F, S
COMPOSITION: New Total wt%

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION: Microprobe analysis by W.I. Ridley, USGS microprobe facility.

King, T.V.V. and W.I. Ridley, 1987, Relation of the Spectroscopic Reflectance of Olivine to Mineral Chemistry and Some Remote Sensing Implications. J. Geophys. Res., 11,457-11,469.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

This is visually and spectrally a pure olivine mineral separate.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

There are weak 2.3-µm alteration features. In addition there are weak but sharp 2.72- and 2.73-µ absorptions likely indicating the presence of a hydrated alteration phase(s). G. Swayze.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2c3b4b # KI3054 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns