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Original Title
Sauerstoffisotope in Sedimentationsprozessen
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Akademie der Wissenschaften der DDR, Leipzig. Zentralinstitut fuer Isotopen- und Strahlenforschung; p. 24; 1975; Isotopes in nature; Gera, German Democratic Republic; 22 Sep 1975; Published in summary form only.
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Shemesh, A.
Weizmann Inst. of Science, Rehovoth (Israel)
Annual Meeting of the Israel Geological Society, 19921992
Weizmann Inst. of Science, Rehovoth (Israel)
Annual Meeting of the Israel Geological Society, 19921992
AbstractAbstract
[en] Abstract only
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Source
Polishook, B. (ed.); Israel Geological Society, Jerusalem (Israel); 24 p; 1992; p. 132; Israel geological society annual meeting, 1992; Ashkelon (Israel); 30 Mar - 1 Apr 1992
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AbstractAbstract
[en] The ferromagnesian chondrules in Allende follow a trend in the oxygen three-isotope plot that diverges significantly from the 16-O mixing line defined by light and dark inclusions and the matrix of the meteorite. The trend probably results from isotopic exchange with an external gaseous reservoir during the process of chondrule formation sometime after the establishment of the isotopic compositions of the inclusions and matrix. The Allende chondrules approach, but do not reach, the isotopic compositions of chondrules in unequilibrated ordinary chondrites, implying exchange with a similar ambient gas, but isotopically different solid precursors for the two types of meteorite. 8 references
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Anon; p. 37-43; 1983; p. 37-43; Lunar and Planetary Institute; Houston, TX (USA)
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AbstractAbstract
[en] Several mineral phases of the Chainpur meteorite are very enriched in deuterium. D /H ratios ranging between 600 and 900 ppm have been measured (i.e. 4 to 6 times the terrestrial value). These data are explained as the result of nuclear reactions on solid grains by an integrated flux of protons of 1019 to 1020 cm-2, for energies larger than 10 MeV. These proton fluxes must have been produced at the very beginning of the solar system (for instance T Tauri radiation). These results are discussed in the light of other cosmochemical data
[fr]
La plupart des phases minerales de la meteorite Chainpur contiennent d'enormes exces de deuterium. Le rapport D/H atteint des valeurs de 600 a 900.10-6 (4 a 6 fois le rapport terrestre). Ces resultats sont interpretes par un modele de spallation par des fluences de protons de l'ordre de 1019 a 1020/cm2 pour les energies superieures a 10 MeV. Ces flux ne peuvent avoir ete produits que pendant l'histoire precoce du systeme solaire (par exemple rayonnement T Tauri). Ce modele est discute en fonction des autres donnees cosmochimiquesOriginal Title
Anomalie du deuterium dans la meteorite Chainpur: une etude isotopique de l'hydrogene et de l'oxygene
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Journal Article
Journal
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences. Serie B; ISSN 0302-8437;
; v. 288(21); p. 375-378

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AbstractAbstract
[en] Abstract only
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Israel Geological Society, Jerusalem (Israel); 13 p; 1991; p. 108; Israel geological society annual meeting, 1991; Akko (Israel); 22-25 Apr 1991
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AbstractAbstract
[en] The majority of people associate heavy water with nuclear power reactors. Although this is, and will remain the major use, there are exciting new applications being developed for the isotopes of hydrogen and oxygen extracted from Ontario Hydro's heavy water
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Canadian Nuclear Society, Toronto, ON (Canada); 557 p; 1991; p. 406-408; 31. Canadian Nuclear Association annual conference; Saskatoon, SK (Canada); 9-12 Jun 1991; 12. Canadian Nuclear Society annual conference; Saskatoon, SK (Canada); 9-12 Jun 1991
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AbstractAbstract
[en] A hypersthene-cordierite-quartz granulite (delta18O/16O = 2.70/00) contains hypersthene porphyroblasts (delta = 1.80/00) which enclose (and thus preserve from the effects of later metamorphic events) inclusions of quartz (delta = 4.30/00) and cordierite (delta = 2.80/00). Initial granulite facies metamorphism (about 1860 m.y.) took place at about 7600C. Fluids responsible for the introduction of 1470 m.y. phlogopite were not greatly different in 18O from those prevailing during the 1860 m.y. metamorphism. Many other granulites (siliceous, feldspathic and basic) over a wide area contain very light oxygen; although several causal mechanisms are suggested, the ultimate source of the widespread light oxygen is still unknown.(auth.)
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Source
Robinson, B.W. (ed.) (Department of Scientific and Industrial Research, Lower Hutt (New Zealand). Inst. of Nuclear Sciences); New Zealand DSIR bulletins; p. 175-179; 1978; p. 175-179; DSIR Science Information Division; Wellington; International stable isotope conference; Lower Hutt, New Zealand; 4 - 6 Aug 1976; ISSN 0077-961X; 

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Kusakabe, Minoru; Ossaka, Joyo; Yoshida, Minoru; Uchida, Tetsuo; Matsuhisa, Yukihiro
Stable isotopes in the earth sciences1978
Stable isotopes in the earth sciences1978
AbstractAbstract
[en] Rocks altered by volcanic gases rich in HCl, HF and SO2, and their fresh counterparts, have been studied chemically, mineralogically and isotopically. In addition, alteration of fresh rock powders of different rock types has been artificially induced by leaving the powders inside fumaroles at various temperatures. As alteration proceeds the rocks as well as the artificially exposed powders become leached and enriched in silica until they consist of almost nothing else with gradual disappearance of original rock-forming minerals. The alteration is also accompanied by the enrichment of 18O. More siliceous rocks become resistant to this type of alteration, in the order basalt, andesite and obsidian. The increase in delta18O of altered rocks may be caused by the following factors:(1) Kinetic isotope effects involved in the net loss of oxygen from rocks during leaching processes at low temperatures; (2) Oxygen isotope exchange between rocks and water vapour in volcanic gases at submagmatic temperatures with a high water/rock ratio during alteration.(auth.)
Primary Subject
Source
Robinson, B.W. (ed.) (Department of Scientific and Industrial Research, Lower Hutt (New Zealand). Inst. of Nuclear Sciences); New Zealand DSIR bulletins; p. 127-137; 1978; p. 127-137; DSIR Science Information Division; Wellington; International stable isotope conference; Lower Hutt, New Zealand; 4 - 6 Aug 1976; ISSN 0077-961X; 

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AbstractAbstract
[en] Short communication. 6 refs, 2 figs
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Institute of Nuclear Chemistry and Technology, Warsaw (Poland); 117 p; 1992; p. 31-32; Institute of Nuclear Chemistry and Technology; Warsaw (Poland)
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AbstractAbstract
[en] Short communication; 3 refs
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Canadian Nuclear Association, Toronto, ON (Canada); Canadian Nuclear Society, Toronto, ON (Canada); 311 p; 1991; p. 3.4-3.9; 31. Canadian Nuclear Association annual conference; Saskatoon, SK (Canada); 9-12 Jun 1991; 12. Canadian Nuclear Society annual conference; Saskatoon, SK (Canada); 9-12 Jun 1991; See proceedings for full document.
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