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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Dolomite ML97-3 Ferroan DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: ML97-3
MINERAL_TYPE: Carbonate
MINERAL: Dolomite (Dolomite group)
FORMULA: CaMg(CO3)2
FORMULA_HTML: CaMg(CO3)2
COLLECTION_LOCALITY: Carson Hill Quarry, 7 km SE of Angels, CA
ORIGINAL_DONOR: Carson Hill Quarry
CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.
SAMPLE_DESCRIPTION:
Ferroan dolomite collected from the Carson Hill Quarry, in the Mother Lode district in the foothills of the Sierra Nevada of California. Sample collected from quarry wall in 1997.
END_SAMPLE_DESCRIPTION:
XRD_ANALYSIS:
Not Available
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF,EM(WDS), ICP(Trace),WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
Spectrum has very strong saturated doublet at 0.9858 and 1.3450 microns probably related to Fe in the dolomite. Strong absorption at 2.3191 microns is due to C-O related and slightly shorter than wavelengths of non-ferroan dolomite (e.g. 2.321 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 2475 | 0.2-3.0µm | 200 | g.s.= |
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