ABSTRACT

The isotopic compositions of xenon found in some of the submarine pillow volcanic glasses from the East Pacific Rise (CYAMEX) are quite similar to those of the so-called CCFX xenon released from the carbonaceous chondrite Renazzo. The reasons for this similarity are explained in terms of the alteration of the isotopic composition of xenon in the solar system caused by a combined effect of mass-fractionation, spallation and neutron-capture processes.