Humphrey’s results are actually conservative, because the uniformitarian scientists believe that several heating pulses occurred during 1.5 Ga of geological time, which would have driven off even more helium.
Humphreys deals with objections in appendix D at the end of his chapter.
With U halos, colouration initially develops after 100 Ma worth of alpha decay, becomes darker after about 500 Ma worth, and very dark after about 1 billion worth at today’s rates.
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This chapter is a masterpiece on how a research project should be written: clear with colour pictures, non-dogmatic style, systematic development with great graphics, and objections answered.
At first, Humphreys was concerned about the diffusion rate in biotite that surrounded the relatively large zircon crystals.
My study certainly was not a waste of time, since the earth sciences are filled with the results of dating methods, which guide many uniformitarian ideas in the earth sciences.
Besides, it helps me review the results of the RATE project.
Uniformitarian scientists assume (1) the initial isotope amounts are known, (2) the decay rate has remained constant at today’s rate, and (3) the sample has remained in a closed system for millions and billions of years.
Evidence is presented that all three assumptions are violated in various contexts, but the RATE project concludes that the assumption of constant decay at today’s rates is the most significant wrong assumption.He has a section on the future of RATE in which unanswered questions will be pursued as special projects, while other major research initiatives are developed.There is a thought-provoking appendix by the late Henry Morris on creationist peer review.Radiometric dating is a key area leading to unbelief in the Bible.As a result, I spent the better part of two years studying dating method with the goal of doing research on this problem.Many exciting results have come out of the RATE project.