Nebel, Oliver; Scherer, Erik E; Mezger, Klaus
The Rb-Sr decay system is one of the most widely used geochronometers for obtaining ages and cooling rates of terrestrial magmatic, metamorphic, and hydrothermal events. It has also been extensively applied to date extraterrestrial, early solar system events. The accuracy of Rb-Sr ages, however, strongly depends on the accuracy of the87Rb decay constant (λ87Rb). We determined λ87Rb relative to the decay constants of235U and238U by comparing Rb-Sr ages of minerals with U-Pb ages obtained from...[Show more]
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