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(For further information on spectroscopy, 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.
IMAGE_OF_SAMPLE:
NO PHOTO
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.= |
| LIB_SPECTRA: | splib06a r 7943 | g.s.= |