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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: Asphalt GDS376 Blck_Road old DESCRIPT

DOCUMENTATION_FORMAT: Man Made

SAMPLE_ID: GDS376

MATERIAL_TYPE: Asphalt

MATERIAL: Road Asphalt

FORMULA: Unknown

FORMULA_HTML: Unknown

COLLECTION_LOCALITY: Denver, Colorado, USA

ORIGINAL_DONOR: Gregg Swayze

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab

SAMPLE_DESCRIPTION:

Weathered surface of a chunk of black road asphalt. Gravel is composed of quartz and feldspars. Surface color of asphalt is lighter than interior of sample.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

see:

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 taken on weathered surface. Spectrum curves upward to higher reflectance at longer wavelengths. There are weak absorptions at 1.41, 1.73, 2.20, 2.31, and 2.35 microns. The absorption at 2.20 microns is probably due to trace amounts of kaolinite or another clay or mica. Bands at 1.73, 2.31, and 2.35 are probably C-H related absorptions.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_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 9737 0.2-3.0µm 200 g.s.=


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