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Pb210 geochronology and trace metal concentrations of sediments from Upper Klamath Lake and Lake Euwana, Oregon.

Northwest Science

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Abstract

Rates of sedimentation calculated from analyses of 210Pb activities in cores from two shallow lakes whose mean depths are 2.4m, Upper Klamath Lake and Lake Euwana (Klamath County, Oregon), indicate that they are filling at approximately 3.0mm/yr. Average sedimentation rates for compaction-corrected cores range from 0.9mm/yr to 8.5mm/yr or from 0.03g/cm2/yr to 0.48g/cm2/yr, respectively. Plots of excess 210Pb activity versus depth show a mixing layer due to biological activity and other physical mixing that ranges in thickness from 5-20cm, and that is found below the sediment-water inferface at all coring locations. Trace metal analyses performed to establish baseline levels of selected elements show very low concentrations of all metals measured in cores from Upper Klamath Lake (Cd, Cu, Cr, Fe, Pb, Mn and Zn) when compared with concentrations of these metals found in other North American lacustrine environments.-Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Pb210 geochronology and trace metal concentrations of sediments from Upper Klamath Lake and Lake Euwana, Oregon.
Series title:
Northwest Science
Volume
55
Issue:
4
Year Published:
1981
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Northwest Science
First page:
269
Last page:
280
Number of Pages:
12