Creationists have commented little on the radioisotope dating of meteorites, apart from acknowledging the use of Patterson’s geochron to establish the age of the earth, and that many meteorites give a similar old age. “Pb Isochron and Age of Chondrites.” Journal of Geophysical Research 78 (17): 3227–44.
Morris (2007, 59–61) did focus on the Allende carbonaceous chondrite as an example of a well-studied meteorite analyzed by many radioisotope dating methods, but he only discussed the radioisotope dating results from one, older paper (Tatsumoto, Unruh, and Desborough 1976).
Snelling (2014b) grouped together all the radioisotope ages obtained for ten ordinary (H, L, and LL) and five enstatite (E) chondrites and similarly displayed the data. “Rhenium-Osmium Isotope Constraints on the Age of Iron Meteorites.” Science 255 (5048): 1118–21.
They generally clustered, strongly in the Richardton (H5), St.
In order to rectify this lack of engagement by the creationist community with the meteorite radioisotope dating data, Snelling (2014a) obtained as much radioisotope dating data as possible for the Allende CV3 carbonaceous chondrite meteorite (due to its claimed status as the most studied meteorite), displayed the data, and attempted to analyze them.
He found that both isochron and model ages for the total rock, separated components, or combinations of these strongly clustered around a Pb-Pb age of 4.56–4.57 Ga, the earliest (Tatsumoto, Unruh, and Desborough 1976) and the latest (Amelin et al.
So if some or most of the measured daughter isotopes were already in these meteorites when they were formed on their parent asteroids, then their 4.55–4.57 Ga “ages” obtained by Pb-Pb, U-Pb, and Pb-Pb–calibrated isochron age dating are likely not their true real-time ages, which according to the biblical paradigm is only about 6000 real-time years.
They appear to consistently yield 4.55–4.57 Ga radioisotope ages, adding to the uniformitarians’ confidence in the radioisotope dating methods.
They strongly cluster in the groups of chondrites, stony achondrites, and irons at 4.55–4.57 Ga, dominated by Pb-Pb, U-Pb, and Pb-Pb calibrated isochron ages, testimony to the Pb-Pb technique’s supremacy as the uniformitarians’ ultimate dating tool, which they consider very reliable.
These ages are often confirmed by Rb-Sr, Lu-Hf, Re-Os, and Sm-Nd isochron ages, but agreement could be due to calibration with the Pb-Pb system. “The Interpretation of Lead Isotopes and Their Geological Significance.” In Radiometric Dating for Geologists.
There is also scattering of many Rb-Sr, Lu-Hf, Re-Os, Sm-Nd isochron ages, and a few Pb-Pb isochron ages, in most cases likely due to thermal disturbances resulting from impact cratering of the parent asteroids.
No pattern was found in the isochron ages for these groups of meteorites similar to the systematic patterns of isochron ages found in Precambrian rock units during the RATE project, so there is no evidence of past accelerated radioisotope decay having occurred in these meteorites, and therefore on their parent asteroids. “Sm-Nd Isotopic Evolution of Chondrites and Achondrites, II.” Earth and Planetary Science Letters 67 (2): 137–50.
Snelling (2015a) tabulated all the radioisotope ages of ten further achondrites that have been repeatedly dated—primitive achondrites, angrites, aubrites, mesosiderites, and irons.