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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Chlorite SMR-13 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SMR-13a
MINERAL_TYPE: Phyllosilicate
MINERAL: Chlorite Mg-rich (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: Not available
ORIGINAL_DONOR: Gene Whitney, USGS Denver
CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.
SAMPLE_DESCRIPTION:
Sample was ground in an alumina mortar and pestle and wet sieved with methanol into less than 30µm (e), 30-45µm (d), 45-60µm (c), 60-104µm (b), and 104-150µm (a) size fractions. (Letter denotes spectrum designation)
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:
Sample was analyzed and found to be a Mg-rich chlorite. (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 | 31.00 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 0.08 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 17.30 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | 8.34 | wt% | Fe2O3 |
| COMPOSITION: | MnO | 0.12 | wt% | MnO |
| COMPOSITION: | MgO | 30.20 | wt% | MgO |
| COMPOSITION: | CaO | 0.02 | wt% | CaO |
| COMPOSITION: | Na2O | 0.23 | wt% | Na2O |
| COMPOSITION: | K2O | less than 0.02 | wt% | K2O |
| COMPOSITION: | P2O5 | less than 0.05 | wt% | P2O5 |
| COMPOSITION: | LOI | 12.30 | wt% | LOI |
| COMPOSITION: | Total | 99.66 | wt% | |
| COMPOSITION: | O=Cl,F,S | wt% | #correction for Cl, F, S | |
| COMPOSITION: | New Total | wt% |
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
Compositional data provided by Gene Whitney. 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 a pure chlorite sample. All size fractions were examined visually and by energy dispersive methods to insure chemical homogeneity as a function of grain size interval. Plates about 10 µm thick. G.Swayze.
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 961 | 0.2-2.7µm | 200 | g.s.=115µm |
| LIB_SPECTRA: | splib04a r 973 | 0.2-2.7µm | 200 | g.s.=70µm |
| LIB_SPECTRA: | splib04a r 985 | 0.2-2.7µm | 200 | g.s.=49µm |
| LIB_SPECTRA: | splib04a r 997 | 0.2-2.7µm | 200 | g.s.=33µm |
| LIB_SPECTRA: | splib04a r 1009 | 0.2-2.7µm | 200 | g.s.=15µm |
| LIB_SPECTRA: | splib05a r 1697 | 1.3-5.3µm | 200 | g.s.=115µm |
| LIB_SPECTRA: | splib05a r 1738 | 0.2-2.7µm | 200 | g.s.=70µm |
| LIB_SPECTRA: | splib05a r 1752 | 0.2-2.7µm | 200 | g.s.=49µm |
| LIB_SPECTRA: | splib05a r 1766 | 0.2-2.7µm | 200 | g.s.=33µm |
| LIB_SPECTRA: | splib05a r 1780 | 0.2-2.7µm | 200 | g.s.=15µm |
| LIB_SPECTRA: | splib05a r 1794 | 0.2-3.0µm | 200 | g.s.= |
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