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  • 1 Centre d'Etudes de Saclay Laboratoire Pierre Sile, CEA-CNRS F-91191 Gif-sur-Yvette Cedex France
  • | 2 Institut de Physique du Globe et Université P. & M. Curie Laboratoire de Géochimie Comparée et Systématique, URA 1758-CNRS 4, place Jussieu F-75252 Paris Cedex 05 France
  • | 3 Ecole des Mines Centre d'Informatique Géologique 35, rue Saint Honoré F-77305 Fontainebleau Cedex France
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Abstract  

The capabilities of neutron activation for trace elements geochemical investigation are demonstrated on the basis of long term determination and intercomparisons for the purpose of geochemical oceanic basalts investigations. We illustrate by a few examples the necessity of these capabilities for precise petrological and geodynamical modelizations. Hygromagmaphile trace element fingerprints of mantle heterogeneities are emphasized.