Abstract

We reinterpret the xenon data from a stepwise heating of the Murray and Renazzo carbonaceous chondrites by Reynolds and co-workers and confirm the exceptionally large amounts of fission-produced xenon postulated by Reynolds' group. Our interpretation supports the existence of three components of xenon in Murray and Renazzo, probably best explained as (i) a primitive trapped component, (ii) a fission component, and (iii) an atmospheric-like component. The excessive amounts of fissiogenic xenon cannot be accounted for by atmospheric contamination, cosmic-ray xenon or diffusion effects.

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