Abstract
Concentration and isotopic composition of He, Ne and Ar have been measured in 14 samples from 12 locations along a 35 cm long drill core through the geometrical center of the 271-kg amphoterite St. Severin. The concentrations of spallogenic 3He and 21Ne increase with depth by about 14% and 35%, respectively. The observed data are in agreement with the model for production of spallogenic nuclides given by Trivedi and Goel (1973). The spallogenic 20Ne/ 22Ne ratio is constant (0.84 ± 0.01), whereby the 22Ne/ 21Ne correlates with the 3He/ 21Ne. This relation can be used to correct the depth effect of noble gas production rates. All measurements of the core are thus in agreement with an exposure age of 10.8 ± 0.2 m.y.
Sign-in/Register to access full text options 
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.
