Clark and others 2007 USGS Data Series 231
Spectral Library splib06a Sample Description

(For further information on spectroscopy, see: http://speclab.cr.usgs.gov)

TITLE: Actinolite-Tremolit BR93-22C DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: BR93-22C

MIXTURE_TYPE: Intimate

MIXTURE: Actinolite-Tremolite Mixture (Amphibole group)

FORMULA: Ca2(Mg,Fe+2)5Si8O22(OH)2 and Ca2Mg5Si8O22(OH)2

FORMULA_HTML: Ca₂(Mg,Fe⁺²)₅Si₈O₂₂(OH)₂ and Ca₂Mg₅Si₈O₂₂(OH)₂

COLLECTION_LOCALITY: Bessemer Mine, Barstow, California, USA

COLLECTION_LATITUDE: Not Available # degrees and decimal minutes (N or S)

COLLECTION_LONGITUDE: Not Available # degrees and decimal minutes (W or E)

DATUM: Not Available # coordinate datum

ORIGINAL_DONOR: Eric Livo

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

field description: Actinolite-Tremolite bearing Rock
contact skarn between limestone and quartz-monzonite wall rocks with the iron ore deposit

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Major: Actinolite, Tremolite, and Albite
Trace: Microcline

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

No additional compositional details available.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

IMAGE_OF_SAMPLE: Not Available

SPECTROSCOPIC_DISCUSSION:

generic broad Fe²⁺ one micron band, an OH stretch at 1.4 microns, and strong (Mg,Fe)-OH combination bands at 2.32 and 2.38 microns

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:	splib05a r 7144	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib06a r 23833			g.s.=