Allegre, Claude

Allegre, Claude u. Michard Gil Uber die Unterschiede der Altersbe-stimmung nach der Strontium- und der Argonmethode. C. R. hebd. Seances Acad. Sci. 259, 4313 (1964). 

Allegre, Claude, J., Lancelot Joel A new method for the mass spectro-metric isotope analysis of lead contained in rocks and minerals (in French). Acad. Sci. Paris Compt. Rend. Ser. D266, 1646—1648 (1968). 

Bourdon B, Joron J-L, Claude-lvanaj C, Allegre CJ (1998) U-Th-Pa-Ra systematics for the Grande Comore volcanics melting processes in an upwelling plume. Earth Planet Sci Lett 164 119-133... 

Figure 8. ° Pb7 Pb vs. Th/Us (derived using Eqn. 5 in the text) diagram for mid-ocean ridge and ocean island basalt based on a recent data set with mostly mass spectrometry measurements (Turner et al. 1997 Bourdon et al. 1996 Dosso et al. 1999 Claude-lvanaj et al. 1998, 2001 Sims et al. 2002). The data show a relatively well defined array that intersect a closed-system hne for the bulk Earth starting with an initial lead isotope composition equal to Canyon Diablo (T = 4.55 Ga). This intersect was used by Allegre et al. (1986) to define the Th/U ratio of the Earth.

Davies H. L. (1980) Cmstal stmcture and emplacement of ophiolite in southern Papua New Guinea. In Association Mafiques Ultra-mafiques Dans Les. Orogenes-Orogenic Mafic Ultra-mafic Association (eds. Allegre, J. Claude, Aubouin, and Jean). Centre National de la Recherche Scientifique, Paris, France, vol. 272, pp. 17-33. 

Claude-Ivanaj C., Bourdon B., and Allegre C. J. (1998) Ra-Th-Sr isotope systematics in Grande Comore Island a case study of plume-lithosphere interaction. Earth Planet. Set Lett. 164, 99-117. 

Claude-Ivanaj C., Joron J. L., and Allegre C. J. (2001) 238u 230-j 226j fractionation in historical lavas from the Azores long-lived source heterogeneity vs. metasomatism fingerprints. Chem. Geol. 176, 295-310. 

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