(For further information on spectroscopy, see:
TITLE: Pyroxene Basalt CU01-20A DESCRIPT
MIXTURE: Pyroxene + other mineral phases
FORMULA: Not Available
FORMULA_HTML: Not Available
COLLECTION_LOCALITY: 6 km south of Western Center, Cuprite, Nevada, USA
ORIGINAL_DONOR: Gregg Swayze
COLLECTION_LATITUDE: N37 29.12' # degrees and decimal minutes (N or S)
COLLECTION_LONGITUDE: W117 14.48' # 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 intrusive basalt plug 6 km south of the western alteration center within the Cuprite Hills. The sample spectrum was of a slightly weathered surface. Most other surfaces in the intrusive body are heavily coated with desert varnish and hence have much weaker pyroxene absorptions.
Augite (major), diopside (major), anorthite (major), forsterite (trace), quartz (trace), analcime (trace).
COMPOSITIONAL_ANALYSIS_TYPE: XRF # XRF, EM(WDS), ICP(Trace), WChem
The spectrum has characteristic absorptions from pyroxene at 1.0391 microns with very weak absorptions from hydrated phases (clays?) at 2.2057 and 2.3113 microns.
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history of the Cuprite Mining District, southwestern Nevada: an integrated geological and geophysical approach: unpublished Ph.D. Dissertation, University of Colorado at Boulder, 399p.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: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
|LIB_SPECTRA:||splib05a r 8966||0.2-3.0µm||200||g.s.=|
|LIB_SPECTRA:||splib06a r 26360||g.s.=|