全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Sandrine Le Houedec , Laure Meynadier , Claude J. Allègre
来源:[J].Marine Geology(IF 2.732), 2016, Vol.380, pp.138-147Elsevier
摘要:Abstract(#br)This study reports neodymium isotopic (ε Nd ) variability at a time resolution of 0.5 to 3 Ma since the Late Cretaceous as recorded in a marine sedimentary core from the Western Pacific (ODP 807; 3°36′N, 156°3′E; Ontong Java Plateau). Our core is mainly fin...
作者:Claude J. Allègre
来源:[J].Mineralium Deposita(IF 2.147), 1966, Vol.1 (2), pp.104-112Springer
摘要:Abstract(#br)The author develops a theory of 32 S/ 34 S ratio, based on notions of isotopic quilibrium obtainment or non obtainment, and of open or closed system, permitting to explain both measurements made on sulfur ore desposits and laboratory experiments. From this theory he ...
作者:Sandrine Le Houedec , Laure Meynadier , Claude J. Allègre
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2012, Vol.327-328, pp.29-38Elsevier
摘要:Abstract(#br)We have analyzed the Nd isotopic composition of both ancient seawater and detrital material from long sequences of carbonated oozes of the South Indian Ocean which are ODP Site 756 (Ninety East Ridge (− 30°S), 1518 m water depth) and ODP Site 762 (Northwest Aust...
作者:Claude J. Allègre , Pierre Schiano , Eric Lewin
来源:[J].Earth and Planetary Science Letters(IF 4.349), 1995, Vol.129 (1), pp.1-12Elsevier
摘要:Abstract(#br)Trace element multidimensional analysis of ocean island basalts defines a structure delimited by the same four end members (Hawaiian Islands, St. Helena-Tubuai-Mangaia Islands, Kerguelen-Gough-Tristan da Cunha and the Society Islands) as determined by isotope ratios....
作者:Claude J. Allègre , Gérard Manhès , Christa Göpel
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 1995, Vol.59 (8), pp.1445-1456Elsevier
摘要:Abstract(#br)Forty years ago, Patterson in his pioneering work on lead isotopes defined the age of the Earth and of the meteorites with 4.55 Ga. We reconsider the question of the age of the Earth and its relation to the age of the meteorites, and similar to Patterson's appro...
作者:Claude J. Allègre , Gérard Manhès , Christa Göpel
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2008, Vol.267 (1-2), pp.386-398Elsevier
摘要:Abstract(#br)The revelation of a small 182 W terrestrial excess relatively to the 182 Hf– 182 W systematics in meteorites has led some authors to claim that the Earth experienced a rapid accretion and an early differentiation, 30–40 Ma after the birth of the solar system at ...
作者:Claude J. Allègre
来源:[J].Earth and Planetary Science Letters(IF 4.349), 1997, Vol.150 (1), pp.1-6Elsevier
摘要:Abstract(#br)It is increasingly accepted, through the use of geochemical arguments, that the Earth's mantle has a two-layer structure, comprising an upper and lower mantle. Estimates of the exchange of matter and energy between these two layers are, thus, central to understa...
作者:Claude J. Allègre , Bernard Dupré ...
来源:[J].Chemical Geology(IF 3.154), 1996, Vol.131 (1), pp.93-112Elsevier
摘要:Abstract(#br)87 Sr 86 Sr , 143 Nd 144 Nd , 206 Pb 204 Pb , 207 Pb 204 Pb and 208 Pb 204 Pb isotopic ratios and Rb, Sr, Sm, Nd, U, Pb and Th concentrations have been measured in the suspended loads of the Congo and Amazon rivers and their tributaries. In the dissolved load, 8...
作者:Claude J. Allègre , Jean-Paul Poirier ...
来源:[J].Earth and Planetary Science Letters(IF 4.349), 1995, Vol.134 (3), pp.515-526Elsevier
摘要:Abstract(#br)The bulk composition of the Earth and the composition of the mantle and core are calculated using the ratios of major and trace elements.(#br)The ratios of elements which do not enter the core (lithophile) are the same in the bulk Earth as in the mantle. Bulk earth r...
作者:Claude J. Allègre , Jean Louis Le Mouël ...
来源:[J].Physics of the Earth and Planetary Interiors(IF 2.383), 1995, Vol.92 (3), pp.215-233Elsevier
摘要:Abstract(#br)In this paper we use an energy splitting combined with a renormalization group approach to model the behaviour of a fault zone subject to earthquakes. After developing the formalism we explore through numerical experiments the case of a single domain and the case of ...

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