Actions for Ion Uptake Determination of Dendrochronologically-Dated Trees Using Neutron Activation Analysis [electronic resource].

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Ion Uptake Determination of Dendrochronologically-Dated Trees Using Neutron Activation Analysis [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Pennsylvania State University, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Uptake of metal ions by plan roots is a function of the type and concentration of metal in the soil, the nutrient biochemistry of the plant, and the immediate environment of the root. Uptake of gold (Au) is known to be sensitive to soil pH for many species. Soil acidification due to acid precipitation following volcanic eruptions can dramatically increase Au uptake by trees. Identification of high Au content in tree rings in dendrochronologically-dated, overlapping sequences of trees allows the identification of temporally-conscribed, volcanically-influenced periods of environmental change. Ion uptake, specifically determination of trace amounts of gold, was performed for dendrochronologically-dated tree samples utilizing Neutron Activation Analysis (NAA) technique. The concentration of gold was correlated with known enviironmental changes, e.g. volcanic activities, during historic periods.
Report Numbers
E 1.99:doe/id/14702
doe/id/14702
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Note
Published through SciTech Connect.
03/30/2009.
"doe/id/14702"
J.J. Chiment; Kenan Unlu; P.I. Kuniholm; N.O. Cetiner; D.K.H. Schwarz.
Type of Report and Period Covered Note
Final; 07/01/2005 - 06/30/2008
Funding Information
FG07-05ID14702
View MARC record | catkey: 14130326