Alunite-K

Spectrum Details

Modality

NIR

Category

soil

Material Type

Intimate

Sample ID

CU91-217G1

Collection Locality

Alunite Hill, Western Alter. Center, Cuprite, Nevada, USA

Spectral Purity

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

Composition / XRD

XRF # XRF, EPMA, ICP(Trace), WChem

Sample Description

This sample was collected next to a fault along which hydrothermal fluids may have emerged near the center of alunite hill in the southwestern portion of the relict hydrothermal center at Cuprite, NV. The sample may have been part of the lower Cambrian Harkless Phyllite or a Tertiary rhyolitic tuff which was altered by the hydrothermal fluids about 7.5 Ma.

XRD Analysis

K-alunite and quartz.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126