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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Chlor+Goethite CU93-4B Phyl DESCRIPT
DOCUMENTATION_FORMAT: MIXTURE
SAMPLE_ID: CU93-4B
MIXTURE_TYPE: Intimate
MIXTURE: Chlorite and Goethite
FORMULA: (Mg,Fe)3(Si,Al)4O10(OH)2-(Mg,Fe)3(OH)6 and alpha-Fe3+O(OH)
FORMULA_HTML: (Mg,Fe)3(Si,Al)4O10(OH)2-(Mg,Fe)3 and alpha-Fe3+O(OH)
COLLECTION_LOCALITY: Cuprite, Nevada, 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: U.S.G.S. Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Goethite coated Chlorite Phyllite. Part of lower Cambrian Harkless Phyllite that was altered around 7.0 Ma by hydrothermal fluids. Sample is from the core propylitic zone of the western hydrothermal center.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
none
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF, EM(WDS), ICP(Trace),WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
none
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
none
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
Spectrum is that of goethite and chlorite with possibly a trace of muscovite as indicated by the weak absorption at 2.2045 microns. Goethite absorptions superimposed on those of chlorite in the electronic region (0.35 to 1.35 microns). Sample may contain magnetite which may depress the overall spectral level.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_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 7802 | 0.2-3.0µm | 200 | g.s.= |
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