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: muscovite+pyrophyllite JH_PYRP1 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: JH_PYRP1

MIXTURE_TYPE: Intimate

MIXTURE: Muscovite + Pyrophyllite

FORMULA: KAl2[AlSi3O10](OH,F)2 + Al2Si4O10(OH)2

FORMULA_HTML: KAl₂[AlSi₃O₁₀](OH,F)₂ + Al₂Si₄O₁₀(OH)₂

COLLECTION_LOCALITY: east ridge Jupiter Hill, park City, Utah, USA

ORIGINAL_DONOR: Barnaby Rockwell

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

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Lab ASD spectrum of altered fissure zone, east ridge Jupiter Hill. Quartz + minor muscovite (5-25%) + minor pyrophyllite (5-25%).

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Quartz + minor muscovite (5-25%) + minor pyrophyllite (5-25%)

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:

END_SPECTROSCOPIC_DISCUSSION.

Spectrum has absorptions at 0.7560 and 1.15 microns from an unknown material. There are absorptions characteristic of both pyrophyllite and muscovite. Both minerals have absorptions that overlap near 1.4 and 2.2 microns. The offset at 1.01 microns is an artifact.

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