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Since that time little work has been done to locate other radiohalo-bearing diamonds, to explain the origin of the radiohalos, or evaluate their significance.We conducted a search for such diamonds secured from a variety of sources and identified radiohalos containing one, three and four rings, as well as strange features in the form of twisted crystalline “tubes.” New data suggest a radiohalo annealing temperature in diamond above 620ºC.Alpha-particles produced by radioactive decay of U, Th, and their decay products (including Po) in the tiny mineral inclusions (often zircons) penetrate the surrounding host minerals (often the dark mica, biotite) damaging their crystal lattices.Because the a-particles emitted by the different radionuclides in the U and Th decay chains have different energies, they travel different distances.The biotite grains in all these granitic rocks have large numbers of Po radiohalos.Dark, fully-formed Th radiohalos are also common in the Cooma granodiorite.Whatever secondary processes were thus responsible for separating the necessary Po from its parent U and concentrating it into the radiocenters, the timescale involved had to be very short.
Such Flood-related granitic rocks investigated thus far include the Stone Mountain granite near Atlanta (Georgia), the La Posta zoned granodiorite and related granites in the Peninsular Ranges of southern California east of San Diego, and the Cooma granodiorite and four other granitic bodies in southeastern Australia.
Furthermore, such accelerated radioactive decay would have generated a large pulse of heat during the Flood.
This in turn would have helped to initiate and drive the global tectonic processes that operated during the Flood year, and to accomplish catastrophically much geologic work, including the regional metamorphism of sedimentary strata and the melting of crustal and mantle rocks to produce granitic and other magmas.
However, these granitic rocks evidently formed only recently during the Flood year, so this implies that at least 100 million years worth of radioactive decay at today's rates must have occurred during the Flood year, when geologic processes were operating at catastrophic rates.
Thus the rates of radioactive decay had to have been accelerated during the Flood year and therefore conventional radioisotopic dating of rocks, which assumes constant decay rates, is unreliable and conventional "ages" are grossly in error.