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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: basalt_fresh BR93-46B DESCRIPT
DOCUMENTATION_FORMAT: MIXTURE
SAMPLE_ID: BR93-46B
MIXTURE_TYPE: Intimate
MIXTURE: Anorthite (Tectosilicate - Plagioclase, Ca end member, Feldspar group), Augite (Inosilicate - Pyroxene group), Quartz (Tectosilicate), Tridymite (high-temperature polymorph of quartz), and Cristobalite (high-temperature polymorph of quartz)
FORMULA: CaAl2Si2O8, (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6, SiO2, SiO2, and SiO2
FORMULA_HTML: CaAl2Si2O8, (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6, SiO2, SiO2, and SiO2
COLLECTION_LOCALITY: Newberry Mtns, Southeast of Barstow, CA, USA
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
ORIGINAL_DONOR: Eric Livo
CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Basalt - gray vesicular flow rock (Fresh interior surface).
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Major: Anorthite
Minor: Augite, Quartz, Tridymite, and Cristobalite
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
No additional compositional details available.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
IMAGE_OF_SAMPLE: Not Available
SPECTROSCOPIC_DISCUSSION:
Strong Fe+2 (Augite) absorption feature at one micron, Anorthite and the SiO2 don't contain absorption features in these wavelengths, though they may influence total reflectance levels. Spectral intensity is very low.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
| LIB_SPECTRA_HED: | where | Wave Range | Av_Rs_Pwr | Comment |
|---|---|---|---|---|
| LIB_SPECTRA: | splib05a r 7481 | 0.2-3.0µm | 200 | g.s.= |
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