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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: 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:Al2O317.30wt% 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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