Sample Description USGS Spectral Library Version 7

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
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TITLE: Olivine KI3188 Fo51 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: KI3188

MINERAL_TYPE: Nesosilicate

MINERAL: Olivine (Olivine group)

FORMULA: Mg2SiO4-Fe2SiO4 Fo51

FORMULA_HTML: Mg₂Si₄-Fe₂SiO₄ Fo₅₁

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 (Fo₅₁) 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 34.34 wt% SiO₂

COMPOSITION: TiO2 0.04 wt% TiO₂

COMPOSITION: Cr2O3 0.04 wt% Cr₂O₃

COMPOSITION: FeO 41.43 wt% FeO

COMPOSITION: NiO 0.07 wt% NiO

COMPOSITION: MnO 0.73 wt% MnO

COMPOSITION: MgO 23.80 wt% MgO

COMPOSITION: CaO 0.05 wt% CaO

COMPOSITION: Total 99.41 wt%

COMPOSITION: O=Cl,F,S wt% #correction for Cl, F, S

COMPOSITION: New Total wt%

COMPOSITION KEYWORD	Oxide ASCII	Amount	Weight Percent, %	Oxide html
COMPOSITION:	SiO2	34.34	wt%	SiO₂
COMPOSITION:	TiO2	0.04	wt%	TiO₂
COMPOSITION:	Cr2O3	0.04	wt%	Cr₂O₃
COMPOSITION:	FeO	41.43	wt%	FeO
COMPOSITION:	NiO	0.07	wt%	NiO
COMPOSITION:	MnO	0.73	wt%	MnO
COMPOSITION:	MgO	23.80	wt%	MgO
COMPOSITION:	CaO	0.05	wt%	CaO
COMPOSITION:	Total	99.41	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 a pure olivine mineral separate both microscopically and spectrally.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

There are weak 2.3-µm alteration features.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3b4b # KI3188 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns