Browsing by Author "Joron J.L."

Browsing by Author "Joron J.L."

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  • A METHOD FOR 231PA ANALYSIS BY THERMAL IONIZATION MASS SPECTROMETRY IN SILICATE ROCKS 
    Bourdon B.; Joron J.L.; Allegre C.J. (1999)
    We describe a new technique for analyzing 231Pa in silicate rocks by isotope dilution mass spectrometry. This technique is different from the technique developed by previous studies () and also permits the determination ...
  • MANTLE HETEROGENEITY FROM TRACE ELEMENTS: MAR TRIPLE JUNCTION NEAR 14°N 
    Dmitriev L.; Sobolev A.; Bougault H.; Needham H.D.; Schilling J.G.; Joron J.L. (1988)
    The trace element composition of basalts dredged at the axis of the Mid-Atlantic Ridge between 12°N and 17°N by the R/V “Akademik Boris Petrov” demonstrates the presence of a high-amplitude geochemical anomaly, centered ...
  • PETROLOGY AND GEOCHEMISTRY OF CRETACEOUS ULTRAMAFIC VOLCANICS FROM EASTERN KAMCHATKA 
    Kamenetsky V.S.; Sobolev A.V.; Joron J.L.; Semet M.P. (1995)
    The origin, evolution and primary melt compositions of late Cretaceous high-K ultramafic volcanics and associated basalts of Eastern Kamchatka are discussed on the basis of a study of the mineralogy and geochemistry of the ...
  • VARIABILITY OF TRACE ELEMENTS IN BASALTIC SUITES 
    Schiano P.; Allègre C.J.; Dupré B.; Lewin E.; Joron J.L. (1993)
    This paper discusses the distribution of trace element concentrations in cogenetic suites of lavas, based on the study of trace element histograms. For each histogram, the variability is calculated (V = s/m, where m is the ...