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(For further information on spectroscopy, 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.
PHOTO OF SAMPLE:
NO PHOTO
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.= |
| LIB_SPECTRA: | splib06a r 7170 | g.s.= |