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Workshop on radiological techniques in sedimentation studies : methods and applications

Authors
Publisher
IRD
Publication Date
Keywords
  • Geochronologie
  • Datation
  • Radioelement
  • Isotope Radioactif
  • Plomb
  • Sediment
  • Stratigraphie
  • Methode D'Analyse
  • Modelisation
  • Algorithme
  • Recommandation
  • Indicateur Biologique
Disciplines
  • Computer Science
  • Earth Science
  • Medicine

Abstract

Workshop on radiological techniques in sedimentation studies : methods and applications Workshop on radiological techniques in sédimentation studies: methods and applications Gary Hancock David N. Edgington John A. Robbins John N. Smith Greg Brunskill John Pfitzner The following document summarises the important issues raised during the 3 hour discussion period of the Workshop on "Radiological Techniques in Sédimentation Studies", held on June 22, 2000. The document includes contributions from the above authors summarising, and in some cases illustrating important fea¬ tures of the discussion. The discussion issues covered: - problems associated with the use of "mapping" algorithms, partic¬ ularly CRS, to give unsubstantiated 210Pb "dates"; - the necessity to validate 2l0Pb déposition historiés; - the trend in research journals to publish 210Pb chronologies with supporting data; - the effect of drainage basin résidence times on fallout nuclide séd¬ iment profiles; - the low activity of fallout tracers in the southern hémisphère, and the implications for sample core collection, analysis and geochrono- logical usage. 234 T Environmental Changes and Radioactive Tracers Thèse issues hâve been broadly divided into three sections; the first dealing with problems associated with interprétation and dating of 2l0Pb profiles; the second describing some aspects of large scale processes and geographical features which affect the sédiment pro¬ files of excess 2l0Pb and "bomb" nuclides. Finally some recom- mended sampling and analytical procédures are listed. There was a collective récognition of the need for standards and consistency in reporting data and interprétations in publications. There was concurrence with the idea of trying to influence editorial policies of prominent research journals. Suggestions for editorial policy regarding the use of 210Pb for sédiment geochronology included (1) requiring at least one independent method to verify the chronology, (2) provision of ail relevant d

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