- Modality
- NIR
- Category
- soil
- Material Type
- Intimate
- Sample ID
- CU93-260B
- Collection Locality
- Cuprite, Nevada, USA
- Spectral Purity
- 1_2b3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
- Composition / XRD
- NONE # XRF, EPMA, ICP(Trace),WChem
- Sample Description
- Sample is from the western margin of the eastern relict hydrothermal system exposed 0.5 km east of U.S. Highway 95. Acid-sulfate alteration has altered this sample of a rhyolitic volcanic tuff converting what was once feldspar into buddingtonite, montmorillonite, and quartz. This sample was collected from a small hill that has come to be known as "Buddingtonite Bump." Buddingtonite is a NH4-feldspar.
- XRD Analysis
- Buddingtonite in solid-solution with K-feldspar, also quartz (analysis by Steve Sutley) Montmorillonite was not detected by XRD but may be present at levels below XRD's detection limit. see: Felzer, B. Hauff, P., and Goetz, A.F.H., 19994, Quantitative reflectance spectroscopy of buddingtonite from the Cuprite mining district, Nevada: Journal of Geophysical Research, v.99, no. B2, p. 2887-2895.
- X Units
- cm⁻¹
- Y Units
- Absorbance
- Data Points
- 2,126