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Radiogenic and Stable Isotopes, Fluid Inclusions
2019Samarium and Nd isotope data are used to provide information on the source of melts, as well as to determine the age of the rocks. Several samples yield extreme high 147Sm/144Nd ratios of >0.3, indicating extreme fractionation of the REE. This is also reflected in their calculated present day eNd values of eNdt = 0 at >40.0.
Thomas Dittrich +5 more
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Production and Distribution of Radiogenic Isotopes
2012At present, more than 20 long-lived radioisotopes of heavy elements are known to exist in the Earth’s crust. These are evidence of the gigantic processes which resulted in the formation of chemical elements in our galaxy. The main characteristics of these elements are shown in Table 16.1.
V. I. Ferronsky, V. A. Polyakov
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Sources of oceanic basalts: Radiogenic isotopic evidence
Geology, 1985Oceanic basalts can be subdivided into five distinct groupings on the basis of their Sr, Nd, and Pb isotope composition. These classes, represented by mid-ocean ridge basalts (MORB) and St. Helena, Kerguelen, the Society Islands, and the Hawaiian Islands, may represent different but internally heterogeneous mantle reservoirs or merely distinct groups ...
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Isotopic disequilibrium during anatexis: consequences for radiogenic isotope systematics
1995European Union of Geosciences, Strasbourg 9-13 ...
TOMMASINI, SIMONE, G. R. DAVIES
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A global survey of radiogenic strontium isotopes in river sediments
Chemical Geology, 2021Germain Bayon +2 more
exaly