Isotope dating problems
As I pointed out in the article, when the isotopic abundances are being measured very near time zero and the half-life of the radioactive parent is very long, then even a small amount of radiogenic daughter being present at time zero will result in a large erroneous ‘age’ calculation.Furthermore, a recent article “Metallic lead nanospheres discovered in ancient zircons” says (in the introductory “Significance” section): “The heterogeneous distribution of Pb can, however, affect isotopic measurement by microbeam techniques, leading to spurious age estimates.” This raises significant questions for the technique and casts doubt over its robustness.Where the bottom part intersects the Concordia curve is said to be the ‘age’ of the metamorphic event.
Radioactive Dating Methods I am Kevin Rogers and am the director of Reasonable Faith Adelaide.
Last year we held a number of meetings on the young/old earth issue and gave YECs numerous opportunities to speak.
This is highly significant, as it means that the initial conditions are known to a high level of confidence.
The other point that Justin made was that the dating for Uranium/Lead can be derived from 3 sources: U238 decay, U235 decay and the lead isotope ratio.
Andrew Kulikovsky spoke on one occasion and John Hartnett spoke on 2 occasions. About half those who are on the committee are YECs and the others doubt the YEC position to various degrees.
Jim raised some interesting points but I don’t believe that he addressed the central points that Justin raised.To make such a claim, one would need to know independently and unarguably just what the age of the Earth actually is.I submit that there is no such independently and unarguably known age—unless one is prepared to accept the age that is derived from the Bible, that was provided to us by God, an eyewitness, and some reliable scribes.He has equipment at the University of Adelaide and does the dating analysis himself.Thus he has the knowledge of an experienced practitioner and is not just an armchair theoretician.The technique does have the added advantage that if the ‘ages’ from both the 238U and 235U chains agree with each other, it adds support to the hypothesis that both chains have experienced the same effects during the formation and lifetime of the crystal. ’ The claim is that if a rock undergoes a metamorphic process then some of the U or Pb from the zircon would be lost, which means the ages would no longer be concordant.Tags: Adult Dating, affair dating, sex dating