Opalized Tuff

Spectrum Details

Modality

NIR

Category

soil

Material Type

Intimate

Sample ID

CU00-15E

Collection Locality

Opal Hill, Eastern Alteration 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 from a freshly exposed silica quarry on Opal Hill in the central portion of the eastern alteration center along its eastern margin. The sample was collected from an altered Tertiary Tuff that underwent hydrothermal alteration about 6.6 Ma.

XRD Analysis

Cristobalite and/or opal (major), quartz (major), calcite (minor), tridymite (trace).

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126