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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(For further information on spectrsocopy, see: http://speclab.cr.usgs.gov)

TITLE: Black Mn Coat Tailings LV95-3 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: LV95-3

MIXTURE_TYPE: Coating # Areal, Intimate, Coating, or Molecular

MIXTURE: Mn-coating on rock

FORMULA: Not available

FORMULA_HTML: Not available

COLLECTION_LOCALITY: Leadville Mining District, Leadville, Colorado, USA

ORIGINAL_DONOR: Gregg Swayze

CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Sample was collected from the distal base of a waste rock pile at about 3400 meter elevation 3 km east of the City of Leadville, Colorado. The surface measured spectrally is that which faced upward.

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:

None

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

None

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum increases monotonically from short wavelengths in the UV to a relative maximum in reflectance near 2.3 microns. Superimposed on this broad absorption that is apparently characteristic of Mn-coatings is a broad band centered at 1.28 microns. A weak band near 2.34 microns may indicate carbonate or chlorite?

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 9062 0.2-3.0µm 200 g.s.=


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