Physics
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40..467c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 40, Apr. 1976, p. 467-477.
Physics
Cosmic Rays, Meteorites, Particle Tracks, Radioactive Age Determination, Bondoc Meteorite, Fission, Impact Damage, Plutonium Isotopes, Uranium Isotopes
Scientific paper
The fission track dating technique was applied in conjunction with a method for selective annealing of cosmic ray tracks in the Bondoc, Mincy, Nakhla, and Washougal meteorites. After correction for unannealed cosmic ray tracks and for cosmic-ray induced fission events, the fission-track ages were determined as follows: Bondoc - 0.14 AE, Mincy - 1.5 AE, Nakhla - 4.4 AE, Washougal 4.6-4.3 AE. The ages of Bondoc and Mincy show no indication of a contribution from spontaneous fission of Pu-244. Bondoc's low age is probably indicative of reheating by a late impact. There is not enough evidence to conclude whether the low age of Mincy is indicative of slow cooling or an impact. The fission tracks in Washougal and Nakhla were too abundant to be produced by U-238 alone, with no excess being due to Pu-244 most likely. Therefore, nominal Pu-244 ages were calculated for these meteorites, on the assumption that the Pu-244/U-238 ratio 4.6 AE ago was identical to the initial solar system ratio. Some arguments for the Pu-244 origin of the tracks are put forward.
Anders Edward
Carver E. A.
No associations
LandOfFree
Fission-track ages of four meteorites 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 Fission-track ages of four meteorites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fission-track ages of four meteorites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1612560