TITLE: Olivine KI3377 Fo18 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: KI3377

MINERAL_TYPE: Nesosilicate

MINERAL: Olivine (Olivine group)

FORMULA: Mg2SiO4-Fe2SiO4 Fo18

FORMULA_HTML: Mg2Si4-Fe2SiO4 Fo18

COLLECTION_LOCALITY: Kiglapait intrusive, Labrador

ORIGINAL_DONOR: S.A. Morse, Universith 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 <60µm, prior to spectral characterization. Sample is Fo18 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.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

None

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: EM(WDS) # XRF, EM(WDS), ICP(Trace), WChem


COMPOSITION: SiO2 31.11 wt% SiO2
COMPOSITION: TiO2 0.06 wt% TiO2
COMPOSITION: Cr2O3 0.07 wt% Cr2O3
COMPOSITION: FeO 59.75 wt% FeO
COMPOSITION: NiO 0.12 wt% NiO
COMPOSITION: MnO 1.30 wt% MnO
COMPOSITION: MgO 7.71 wt% MgO
COMPOSITION: CaO 0.09 wt% CaO
COMPOSITION: Total 100.21 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 both microscopically and spectrally. There are weak 2.3-µm alteration features, The rest of the spectrum rates an a.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 3702 0.2-3.0µm 200 g.s.=25µm

LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=