Use of Multispace Technique to Determine the Contribution of Reinjected Sediments in the Mantle (E.G. Lesser Antilles)

  • B. Dupre
  • C. J. Allegre
Part of the NATO ASI Series book series (ASIC, volume 258)


Based on the technique described by Allègre et al (1987) we demonstrate in this paper that sediments having isotopic characteristics similar to the sediments located near the island arc do not contribute to the genesis of Lesser Antilles volcanics. Two solutions are possible to explain the isotope results :
  1. 1)

    very peculiar sediments exist in the source of the basalts or,

  2. 2)

    an old lithosphere having isotope characteristics similar to the source of tholeiites from Parana and eastern USA exists beneath the Lesser Antilles.

The second conclusion is that this technique is clearly more sensitive than the two classical diagrams (207Pb/204Pb - 206Pb/204Pb, 208pb/204pb - 206pb/204pb).


Oceanic Crust Magma Genesis Subcontinental Mantle Isotopic Structure Crust Mantle System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • B. Dupre
    • 1
  • C. J. Allegre
    • 1
  1. 1.Laboratoire de Géochimie et CosmochimieInstitut de Physique du Globe de ParisParis Cedex 05France

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