TITLE: K Alunite + Muscovite + Pyrophyllite + Jarosite GF00-10
MATERIAL TYPE: MINERAL
SAMPLE ID: GF00-10
MINERAL TYPE: Intimate mixture
FORMULA:
COLLECTION LOCALITY: Summit of Preble Mountain, Goldfield Hills, Esmeralda County, Nevada
COLLECTION LOCALITY LAT/LONG: 37º 42' 16.0" N, 117º 10' 4.1" W
ORIGINAL DONOR: Barnaby W. Rockwell
CURRENT SAMPLE LOCATION: USGS Denver, CO
ULTIMATE SAMPLE LOCATION: USGS Denver, CO
SAMPLE DESCRIPTION:
XRD ANALYSIS:
Major (>25%): quartz
Minor (5%-25%): K alunite, muscovite
Trace (<5%): jarosite, orthoclase, pyrophyllite, illite
COMPOSITIONAL ANALYSIS TYPE: EM(WDS) # XRF,
EM(WDS), ICP(Trace), WChem
Compound/Element |
Composition weight % |
|---|---|
|
SiO2 |
|
|
TiO2 |
|
|
Al2O3 |
|
|
FeO |
|
|
MnO |
|
|
MgO |
|
|
CaO |
|
|
Na2O |
|
|
K2O |
|
| Total |
|
|
O=Cl,F,S |
|
| New Total |
|
COMPOSITION DISCUSSION:
MICROSCOPIC EXAMINATION:
WAVELENGTH INTERVALS OF ABSORPTION FEATURES USED IN SPECTRAL ANALYSIS:
| Absorption |
Left
continuum endpoint |
Right
continuum endpoint |
||
|---|---|---|---|---|
| 1 |
2.084 |
2.114 |
2.234 |
2.264 |
| 2 |
2.264 |
2.294 |
2.353 |
2.383 |
| 3 (W) |
1.440 |
1.465 |
1.499 |
1.529 |
SPECTRAL REGION USED FOR CURVE SHAPE COMPETITION: 1.4 - 2.5 µm, Tetracorder group 2
SPECTROSCOPIC DISCUSSION:
USGS SPECTRAL LIBRARY LOCATION AND SPECTRAL RANGE: sprlf01a r 442 0.35-2.50µm
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