A spectral reflectance study (0.4-2.5 μm) of selected playa evaporite mineral deposits and related geochemical processes
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Abstract
Playa evaporite mineral deposits show major compositional variations related to differences in lithology, hydrology, and groundwater geochemistry. The use of visible and near-infrared (VNIR) spectral reflectance measurements as a technique for investigating the mineralogy of playa efflorescent crusts is examined. Samples of efflorescent crust were collected from 4 playa: Bristol Dry Lake, Saline Valley, Teels Marsh, and Rhodes Marsh--all located in eastern California and western Nevada. Laboratory and field spectral analyses coupled with X-ray diffraction analyses of the crusts yielded the following observations: VNIR spectra of unweathered salt crusts can be used to infer the general chemistry of near-surface brines; VNIR spectra are very sensitive for detecting minor hydrate mineral phases contained in mixtures with anhydrous, spectrally featureless, minerals such as halite (NaCl) and thernardite (Na2So4); borate minerals exhibit particularly strong VNIR spectral features that permit small amounts of borate to be detected in efflorescent salt crusts; remote sensing spectral measurements of playa efflorescent crusts may have applications in global studies of playa brines and minerals.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | A spectral reflectance study (0.4-2.5 μm) of selected playa evaporite mineral deposits and related geochemical processes |
| DOI | 10.1109/IGARSS.1990.688652 |
| Volume | 2 |
| Year Published | 1990 |
| Language | English |
| Publisher | Publ by IEEE |
| Publisher location | Piscataway, NJ, United States |
| Larger Work Title | Digest - International Geoscience and Remote Sensing Symposium (IGARSS) |
| First page | 965 |
| Conference Title | 10th Annual International Geoscience and Remote Sensing Symposium - IGARSS '90 |
| Conference Location | College Park, MD, USA |
| Conference Date | 20 May 1990 through 20 May 1990 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |