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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Jarosite_on_Qtzite BR93-34A2 DESCRIPT
DOCUMENTATION_FORMAT: MIXTURE
SAMPLE_ID: BR93-34a2
MIXTURE_TYPE: Coating # Areal, Intimate, Coating, or Molecular
MIXTURE: Jarosite (alunite group) coating on a Muscovite (Mica group) bearing Quartzite
FORMULA: K(Fe+3)3(SO4)2(OH)6, and KAl2Si3O10(OH)2
FORMULA_HTML: KFe+33(SO4)2(OH)6 and KAl2Si3O10(OH)2
COLLECTION_LOCALITY: Rodman Mtns, near 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: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Strong coating of jarosite on a muscovite rich quartzite containing clay and manganese-iron oxides on fracture surfaces.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Major: Quartz
Minor: Jarosite
Trace: Muscovite
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 jarosite absorption features at 0.43, 0.92, 1.47, and 2.65 microns Strong muscovite absorption features at 1.41 and 2.24 microns
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 9200 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 26829 | g.s.= |