Understanding the effect of these grain-scale phenomena on the distribution of He in analyzed minerals should lead to improvements in data interpretation. Finally, we present a new inversion method where the He, U, and Th mapping data can be used to constrain the high- and low-temperature history of a single zircon crystal. The method has some unique features, which allow it to address a wide range of geological questions on orogenesis, volcanism, landscape evolution, meteorite impact events, ore genesis, basin formation, and sediment provenance 1 — 8.
Even before I finished the project, critics began sniping at it. The critics are usually atheists or professing Christians with various old-earth views. Table 1 lists their criticisms and my responses.
The following material may be distributed as long as the author is acknowledged and the text is not altered, edited or sold. This revision is a reply to Humphreys pdf versionwhich is a cursory response to my original essay. In my original essayI extensively criticized and documented some of the numerous problems in Dr.
The RATE project Radioisotopes and the Age of The Earth was a research project conducted by the Creation Research Society and the Institute for Creation Research between and to assess the validity of radiometric dating and other dating techniques in the light of the doctrine of a recent creation. Austin soft rock geologyJohn Baumgardner geophysicsSteven W. Boyd HebrewEugene F.
Christman, Ph. Few areas of science have posed a greater challenge to Young-Earth Creationism than radiometric dating of rocks and minerals. These techniques, which have been in use for nearly a hundred years, show that rocks from the earth and moon, as well as some meteorites, are as old as 4.
Helium Diffusion and Retention in Zircons. This page supplements an introductory paragraph in the author's essay review and a brief technical overview in a general reply that is part of a scientific examination of RATE. The objective of the RATE project was to examine issues of radioactivity in regards to the age of the earth.
The following material may be distributed as long as the author is acknowledged, the material is not sold and the text and its internet links are not altered or edited. Humphreys has not silenced his critics, we are waiting for him to answer our numerous questions. Talkorigins permanently archived the original version of this essay after the first update on November 24, contrary to erroneous statements in footnote 25 of Humphreys b.
Here we present a series of date and diffusion measurements that document the importance of alpha dose, which we interpret to be correlated with accumulated radiation damage, on He diffusivity. Between 1. We interpret these two trends with a model that describes the increasing tortuosity of diffusion pathways with progressive damage accumulation, which in turn causes decreases in He diffusivity at low damage.
Having cleverly passed their abstract through the review process, they adting to include material datingg their zircon helium dating poster that went well beyond what was promised in the abstract. Considering that the metamorphic rocks of the Fenton Hill cores probably spent a lot of their history at depths greater than 15 kilometers, Dr. Humphreys should have at least tried.