(For further information on spectrsocopy, see:
TITLE: Muscovite CU98-8H low-Al + quartz DESCRIPT
MIXTURE: Muscovite low-Al + quartz
FORMULA: KAl2(Si3Al)O10(OH,F)2 + SiO2
FORMULA_HTML: KAl2(Si3Al)O10(OH,F)2 + SiO2
COLLECTION_LOCALITY: Western Altertion Center, Cuprite, Nevada, USA
ORIGINAL_DONOR: Gregg Swayze
COLLECTION_LATITUDE: N37 33.513' # degrees and decimal minutes (N or S)
COLLECTION_LONGITUDE: W117 12.990' # degrees and decimal minutes (W or E) P> DATUM: NAD27 # coordinate datum
CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory
This sample was collected from the northern end of the western alteration center at Cuprite, NV. Sample was collected from unaltered lower Cambrian Harkless Phyllite.
Quartz (major), muscovite (both 1M and 2M1 polytypes)
COMPOSITIONAL_ANALYSIS_TYPE: XRF # XRF, EM(WDS), ICP(Trace), WChem
The spectrum has absorptions characteristic of muscovite with the 1st OH overtone at 1.4120 microns and Al-OH combination band at 2.2070 microns. Bands in the electronic region (0.35- 1.35 microns) indicate that the sample is probably coated with goethite.
See: Swayze, G.A., 1997, The hydrothermal and structural history of the Cuprite Mining District, southwestern Nevada: an integrated geological and geophysical approach: unpublished Ph.D. Dissertation, University of Colorado at Boulder, 399p.
SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
|LIB_SPECTRA:||splib05a r 8783||0.2-3.0µm||200||g.s.=|
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