PIXE Study of Lacustrine Sediments Including A Sediment Core from Lake Maicuru, Para, Brazil

I. I. Kravchenko, R. F. Kelly, F. E. Dunnam, H. A. Van Rinsvelt, J. H. Curtis, P. E. De Oliveira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

PIXE (Particle Induced X-ray Emission) measurements are reported on downcore sediments from Lake Maicuru, a remote lake in the Amazon Basin. We validate the method by comparison of previously obtained wet chemistry/ICP elemental analysis of sediment from four different lakes with elemental analysis obtained by PIXE measurement. Statistical analysis of results from both methods suggests that PIXE analysis works well for heavier elements (Fe, K, and Ca) but poorly on lighter elements (Na, Mg, and P). The sample preparation procedure developed to deal with the hydrophobic nature of the Maicuru sediments is discussed. Changes in the downcore elemental distribution of Ti, Fe, Mn, and Zn in the lake Maicuru sediments are remarkably similar. The control of this parameter is uncertain but is probably due to climatic changes and water availability and weathering. The good comparison of PIXE and ICP for heavier elements and the consistent results on the downcore study suggests that the PIXE technique holds promise for geochemical and paleoenvironmental studies.

Original languageEnglish
Title of host publicationApplication of Accelerators in Research and Industry
Subtitle of host publication17th International Conference on the Application of Accelerators in Research and Industry
EditorsJerome L. Duggan, Margaret Hall, Ira Lon Morgan
PublisherAmerican Institute of Physics Inc.
Pages419-423
Number of pages5
ISBN (Electronic)0735401497
DOIs
StatePublished - Aug 26 2003
Externally publishedYes
Event17th International Conference on the Application of Accelerators in Research and Industry - Denton, United States
Duration: Nov 12 2002Nov 16 2002

Publication series

NameAIP Conference Proceedings
Volume680
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference17th International Conference on the Application of Accelerators in Research and Industry
Country/TerritoryUnited States
CityDenton
Period11/12/0211/16/02

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