Abstract
Neutron activation analysis of uranium, thorium and potassium has been. made on St. Paul's rocks of possible oceanic mantle origin. Results of analysis showed that average values of WISEMAN's “challengerite” are (15.8 ± 0.5) × 10-8 gU/g, (34.5 ± 1.0) × 10-8 gTh/g and (3100 ± 60) × 10-6 gK/g, giving a rate of heat production of ca. 300 × 10-16 cal/cm3·sec. This value agrees with the rate expected for the pyrolitic oceanic upper mantle. Other types of St. Paul's rocks, such as “owenites”, “paulites” and “questites” were shown to contain these elements comparable in amount with peridotite nodules. The Th/U ratio of these rocks, however, is unusually low.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
