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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: Galena S102-17 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: S102-17

MINERAL_TYPE: Sulfide

MINERAL: Galena

FORMULA: PbS

FORMULA_HTML: PbS

COLLECTION_LOCALITY: Guymard Mine, Guymard, NY

ORIGINAL_DONOR: Jules Friedman

CURRENT_SAMPLE_LOCATION: Jules Freidman, USGS

ULTIMATE_SAMPLE_LOCATION: Jules Friedman, USGS

SAMPLE_DESCRIPTION:

Forms series with Clausthalite.

Wilbur, J.S. F.E. Mutschler, J.D. Friedman, and R.E. Zartman, 1990, New chemical, isotopic, and fluid inclusion data from zinc-lead-copper veins, Shawangunk Mountains, New York. Economic Geology, v.85 no.1, pp. 182-196.

Friedman, J.D., F.E. Mutschler, R.E. Zartman, P.H. Briggs, G.A. Swayze, and A.F., Theisen, 1989, Shawangunk ore district, New York: Geochemical and spectral data. USGS Open-File Report 89-193, p. 92.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Not Available

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: ICP # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION
KEYWORD
Element
ASCII
Amount Units
COMPOSITION_TRACE: Ag 162.8 ppm
COMPOSITION_TRACE: As less than 25 ppm
COMPOSITION_TRACE: Au .010 ppm
COMPOSITION_TRACE: Cd 35 ppm
COMPOSITION_TRACE: Cr 50 ppm
COMPOSITION_TRACE: Cu 450 ppm
COMPOSITION_TRACE: Hg 6.00 ppm
COMPOSITION_TRACE: Mn less than 5 ppm
COMPOSITION_TRACE: Ni 5 ppm
COMPOSITION_TRACE: Pb
COMPOSITION_TRACE: Sb 200 ppm
COMPOSITION_TRACE: Se less than 25 ppm
COMPOSITION_TRACE: Te 0.05 ppm
COMPOSITION_TRACE: Tl less than 0.2 ppm
COMPOSITION_TRACE: V 20 ppm
COMPOSITION_TRACE: Zn

COMPOSITION_DISCUSSION:

Mode wt%
Gal 92.0
Sph 6.6
Cpy
Py
Quartz 1.4

Assay wt%
Cu 0.04
Fe 0.36
Pb 79.68
Zn 4.05
S 13.7

Wilbur, J.S. F.E. Mutschler, J.D. Friedman, and R.E. Zartman, 1990, New chemical, isotopic, and fluid inclusion data from zinc-lead-copper veins, Shawangunk Mountains, New York. Economic Geology, v.85 no.1, pp. 182-196.

Friedman, J.D., F.E. Mutschler, R.E. Zartman, P.H. Briggs, G.A. Swayze, and A.F. Theisen, 1989, Shawangunk ore district, New York: Geochemical and spectral data. USGS Open-File Report 89-193, p. 92.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

mode:
90 vol% galena
10 vol% sphalerite
trace quartz

average grain size = 50 µm

This sample has 10 vol% sphalerite and a trace of quartz. Galena has shiny blue metallic luster and is isotropic. This is consistent with this sample being galena. Sphalerite grains are nearly coated with smaller galena grains. G. Swayze.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

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: splib04a r 1679 0.2-3.0µm 200 g.s.= 50 µm
LIB_SPECTRA: splib05a r 2723 0.2-3.0µm 200 g.s.=


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