Remarks on Lunar and Asteroidal Meteorites
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schmelzens, und sind die Tektite von ähnlichem Ausgangsstoff abzuleiten, dann muß man jedoch Fraktionierung von Rb und Sr annehmen, um die Abweichung der Tektitenresultate von der „Isochrone" der Gläser zu erklären. Demnach ist es nicht möglich, genauere Folgerungen aus unseren Messungen hinsichtlich des Ursprungs der EK-Tektite zu gewinnen. Es ist jedoch gesichert, daß eine deutliche Ähnlichkeit zwischen den Rb-Sr-Beziehungen beider Glasarten besteht. Wir danken Professor W. G E N T N E R und Dr. E . T . C . C H A O für die Überlassung des Probenmaterials und Diskussion einschlägiger Fragen. Die Arbeit wurde unterstützt durch die National Aeronautics and Space Administration (NGR-05-002-028) und eine Beihilfe der National Science Foundation.
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