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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

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,EPMA, 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