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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Actinolite-Tremolit BR93-22C DESCRIPT
DOCUMENTATION_FORMAT: MIXTURE
SAMPLE_ID: BR93-22C
MIXTURE_TYPE: Intimate
MIXTURE: Actinolite-Tremolite Mixture (Amphibole group)
FORMULA: Ca2(Mg,Fe+2)5Si8O22(OH)2 and Ca2Mg5Si8O22(OH)2
FORMULA_HTML: Ca2(Mg,Fe+2)5Si8O22(OH)2 and Ca2Mg5Si8O22(OH)2
COLLECTION_LOCALITY: Bessemer Mine, Barstow, California, 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:
field description: Actinolite-Tremolite bearing Rock
contact skarn between limestone and quartz-monzonite wallrocks with the iron
ore deposit
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Major: Actinolite, Tremolite, and Albite
Trace: Microcline
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:
generic broad Fe2+ one micron band, an OH stretch at 1.4 microns, and strong (Mg,Fe)-OH combination bands at 2.32 and 2.38 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 7144 | 0.2-3.0µm | 200 | g.s.= |
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