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 KI3291 Fo29 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: KI3291

MINERAL_TYPE: Nesosilicate

MINERAL: Olivine (Olivine group)

FORMULA: Mg2SiO4-Fe2SiO4 Fo29

FORMULA_HTML: Mg₂Si₄-Fe₂SiO₄ Fo₂₉

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 is Fo₂₉ and is part of a solid solution suite.

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 31.98 wt% SiO₂

COMPOSITION: TiO2 0.06 wt% TiO₂

COMPOSITION: Cr2O3 0.05 wt% Cr₂O₃

COMPOSITION: FeO 53.65 wt% FeO

COMPOSITION: NiO 0.11 wt% NiO

COMPOSITION: MnO 1.23 wt% MnO

COMPOSITION: MgO 12.61 wt% MgO

COMPOSITION: CaO 0.35 wt% CaO

COMPOSITION: Total 100.04 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	31.98	wt%	SiO₂
COMPOSITION:	TiO2	0.06	wt%	TiO₂
COMPOSITION:	Cr2O3	0.05	wt%	Cr₂O₃
COMPOSITION:	FeO	53.65	wt%	FeO
COMPOSITION:	NiO	0.11	wt%	NiO
COMPOSITION:	MnO	1.23	wt%	MnO
COMPOSITION:	MgO	12.61	wt%	MgO
COMPOSITION:	CaO	0.35	wt%	CaO
COMPOSITION:	Total	100.04	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 mineral separate.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

There are weak 2.3-µm alteration features.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3b4_ # KI3291 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns