WWRC 88-16
Reconnaissance Survey: Trace Metals Concentration in Wind River Glaciers
Abstract
A reconnaissance investigation of Bull Lake and Knife Point glaciers in the Wind River Range,
Wyoming, has yielded data on the aerosol deposition of trace metals in the youngest layers of snow
and ice. The study provides minimal background data for preindustrial period aerosol deposition in
this region of Wyoming. Site selection for sampling is critical and several sampling techniques are
reviewed. Dating of the different snow/ice layers is uncertain. Chemical analysis reveals little
evidence that local power plants or trona industries have much Influence on atmospheric deposition
on the sampled glacier. Trace metal concentrations ranged from 0.1 ug/l to 200 ug/l. Our data
indicate copper, zinc, and lead enrichment, relative to mean crustal abundance. Measurements show
the terminus of Knife Point glacier has receded 228 meters since 1963. Stratigraphic measurements
suggest some ice may be over 1000 years old.
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