Fractionation of the 238 U decay series in the zeolitization of volcanic ashes

Details Fractionation of the 238 U decay series in the zeolitization of volcanic ashes Fractionation of the 238 U decay series in the zeolitization of volcanic ashes

Oct 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971gecoa..35.1067c&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 35, Issue 10, pp.1067-1072

Physics

Scientific paper

U and Th contents and U, Th and Ra long-lived isotopes were measured in unaltered and in zeolitized Holocene volcanic ashes from the Phlegraean Fields, Campania, S. Italy. Ra, U and Th concentrations decrease with increasing zeolitization of the rock (Ra > U > Th). In unaltered ashes, near-equilibrium conditions exist between 226 Ra and 230 Th. 226 Ra contents of strongly zeolitized ashes however are 40-50 per cent lower than equilibrium concentration with the measured 230 Th. Equilibrium conditions prevail for the 232 Th series in all types of ashes. It is concluded that zeolitization processes lasted several thousand years after the eruption of the rock, but probably are not active at present, i.e. about 10,000 years after the eruption.

Affiliated with

Also associated with

No associations

Rating

Fractionation of the 238 U decay series in the zeolitization of volcanic ashes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fractionation of the 238 U decay series in the zeolitization of volcanic ashes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fractionation of the 238 U decay series in the zeolitization of volcanic ashes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1637841