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
_{For more information on the library, see:
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web link}

TITLE: Pyrite LV95-6A on Tail DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: LV95-6A

MIXTURE_TYPE: Intimate

MIXTURE: Pyrite (Pyrite group) + possible other sulfides

FORMULA: FeS2

FORMULA_HTML: FeS₂

COLLECTION_LOCALITY: Leadville, Colorado, USA

ORIGINAL_DONOR: Gregg Swayze

COLLECTION_LATITUDE: Not Available # degrees and decimal minutes (N or S)

COLLECTION_LONGITUDE: Not Available # degrees and decimal minutes (W or E)

DATUM: Not Available # coordinate datum

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory, Denver, Colorado

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory, Denver, Colorado

SAMPLE_DESCRIPTION:

Weathered Pyrite from the surface of the Strayhorse Gulch mine tailings 1 km east of the City of Leadville. Sample may possibly contain other sulfides in low amounts.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

none

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF, EPMA, ICP(Trace),WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

none

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

none

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum characteristic of pyrite with a broad Fe absorption at 1.20 microns and a sharp absorption edge in the visible. This is a coarse grained sample of pyrite that has withstood weathering for the better part of a century.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns