Calcite REE-bearing

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Carbonate

Sample ID

WS319a

Collection Locality

Snowbird Mine, Mineral County, Montana, USA

Spectral Purity

1b2_3_4_ # WS319a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

None # XRF, EPMA, ICP(Trace), WChem COMPOSITION_TRACE:

Sample Description

Light brown stained dolomite matrix with dark brown parisite crystals also with the same catalog number WS319. IMAGE_OF_SAMPLE:

XRD Analysis

X-ray diffraction analysis suggests dolomite with minor calcite. Trace to minor calcite was identified with slightly shifted peaks suggesting element substitution in the calcite crystal lattice, which may be due to substitution of rare earth elements. R. Driscoll. Dolomite is major phase with a trace of calcite. REE were not observed in survey chemistry by handheld X-ray fluorescence with a detection limit of ~400 ppm. B. Benzel.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126