Browsing by Subject "RADIOACTIVE ISOTOPES"
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Browsing by Subject "RADIOACTIVE ISOTOPES"
Now showing items 1-7 of 7
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(2000)Eucrites are the witnesses of an early magmatic activity in small planetary bodies. Iron meteorites also testify to an early differentiation in planetesimals. Are basaltic magmatism and iron segregation related to each ...
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(2001)The terrestrial heat-helium imbalance [O'Nions and Oxburgh, Nature 306 (1983) 429-431] is based on the observation that significantly less 4He is released from the Earth's mantle than is predicted from the radiogenic element ...
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ISOTOPIC SEARCH FOR LIVE 135CS IN THE EARLY SOLAR SYSTEM AND POSSIBILITY OF 135CS-135BA CHRONOMETER (2001)Here we report the isotopic excess of 135Ba studied from Ba isotopic measurements of acid leachates of Allende calcium-aluminum rich inclusions (CAIs) and two primitive chondrites, Beardsley (H5) and Zag (H6 clasts). From ...
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(2001)Mantle isochrons such as those observed for oceanic basalts in the 207Pb/204Pb vs. 206Pb/204Pb diagram do not date discrete differentiation events but are often suggested to reflect a mean age of differentiation within the ...
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(1999)This is the first contribution towards a reevaluation of exposure histories of iron meteorites and of the constancy of the cosmic ray flux over the last billion years, as recorded in these fossil detectors. We have performed ...
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(2000)The presence of Zr isotope anomalies in the early solar system is demonstrated with the identification of 92Zr excesses and 96Zr deficits in several chondrites and the CAI Allende inclusions. The isotopic composition of ...
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(2008)В результате мирных подземных ядерных взрывов «Кристалл» и «Кратон-3», проведенных в Мирнинском районе Республики Саха (Якутии), произошло загрязнение продуктами деления поймы рр. Далдын и Марха. Целью работы было определение ...
Now showing items 1-7 of 7