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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Prochlorite SMR-14 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SMR-14
MINERAL_TYPE: Phyllosilicate
MINERAL: Prochlorite (Chlorite group)
FORMULA: (Mg,Fe)3(Si,Al)4O10(OH)2-(Mg,Fe)3(OH)6
FORMULA_HTML: (Mg,Fe)3(Si,Al)4O10(OH)2-(Mg,Fe)3(OH)6
COLLECTION_LOCALITY: unknown
ORIGINAL_DONOR: Gene Whitney, USGS, Denver
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Sample was ground in an alumina mortar and pestle and wet sieved with methanol into less than 30µm (c), 30-45µm (b), and 104-150µm (a) size fractions.
King, T.V.V. and R.N. Clark, 1989, Spectral Characteristics of Chlorites and Mg-Serpentines Using high-Resolution Reflectance Spectroscopy. Jour. Geophys. Res., 13.997-14,008.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
This sample was found to be representative of its structural classification. (King and Clark, 1989)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: EM(WDS) # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION KEYWORD |
Oxide ASCII |
Amount | Weight Percent, % |
Oxide html |
|---|---|---|---|---|
| COMPOSITION: | SiO2 | 19.90 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 5.38 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 15.20 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | 35.10 | wt% | Fe2O3 |
| COMPOSITION: | MnO | 0.57 | wt% | MnO |
| COMPOSITION: | MgO | 16.80 | wt% | MgO |
| COMPOSITION: | CaO | 0.02 | wt% | CaO |
| COMPOSITION: | Na2O | 0.20 | wt% | Na2O |
| COMPOSITION: | K2O | 0.02 | wt% | K2O |
| COMPOSITION: | P2O5 | 0.05 | wt% | P2O5 |
| COMPOSITION: | LOI | 7.10 | wt% | LOI |
| COMPOSITION: | Total | 100.34 | wt% |
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
Compositional data provided by Gene Whitney, USGS, Denver, CO
King, T.V.V. and R.N. Clark, 1989, Spectral Characteristics of Chlorites and Mg-Serpentines Using high-Resolution Reflectance Spectroscopy. Jour. Geophys. Res., 13.997-14,008.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Microscopically this appears to be pure prochlorite. All size fractions were examined visually and by energy dispersive methods to ensure chemical homogeneity as a function of grain size interval. (T. King)
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
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: | splib04a r 3956 | 0.2-3.0µm | 200 | g.s.= 115 µm |
| LIB_SPECTRA: | splib04a r 3967 | 0.2-3.0µm | 200 | g.s.= 32 µm |
| LIB_SPECTRA: | splib04a r 3978 | 0.2-3.0µm | 200 | g.s.= 15 µm |
| LIB_SPECTRA: | splib05a r 5517 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5530 | 1.3-5.3µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5570 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5583 | 1.3-5.3µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5623 | 0.2-3.0µm | 200 | g.s.= |
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