Radioactive dating flawed










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Carbon Dating Is Inaccurate

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Radioactive dating fatal flaw

So one could argue that any variations in Pb ratios would have to result from radioactive decay. Fractionation followed by mixing can create isochrons giving too old ages, without any fractionation of daughter isotopes taking place. Due to some published anomalies, I don't think we know that they have any clear relationship to the assumed dates. This will, over the assumed millions of years, produce uneven concentrations of lead isotopes. This produces an isochron yielding the same age as sample A. Furthermore, here is a brief excerpt from a recent article which also indicates that isochrons often have severe problems. With so many unknowns I don't think so. First let me note that there is a lot more going on than just mixing. Suppose that A has a for the sake of argument, uniform concentration of P1 of parent, D1 of daughter, and N1 of non-radiogenic isotope of the daughter. So this implies some kind of chemical fractionation. Finally, if one only considers U-Pb and Th-Pb dates for which this test is done, and for which mixing cannot be detected. Such a high melting point would imply fractionation in the magma. If I have a rock X with lots of uranium and lead daughter isotope, and rock Y with less of both relative to non-radiogenic lead , then one will get an isochron with a positive slope. Thus only a small fraction of the radium present in the lava at most 10 percent is the result of decay of the uranium in the lava.

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Jul 30, The fatal flaw with radioactive dating methods by Tas Walker This is the pre- publication version which was subsequently revised to appear in.

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Description: These will be definite factors that will change relative concentrations of parent and daughter isotopes in some way, and call into question the reliability of radiometric dating. When the remaining melt crystallizes, either in place or in a new location if it migrates out of the chamber, it will form a rock with a chemical composition much different from the original magma Figure 3. Uranium in the major uranium deposits in the San Juan basin of New Mexico is believed to have been derived from silicic volcanic ash from Jurassic island arcs at the edge of the continent. As lava rises through the crust, it will heat up surrounding rock. Geologists attempt to estimate the initial concentration of daughter product by a clever device called an isochron. Many of the above authors attempt to explain these "fictitious" ages by resorting to the mixing of several sources of magma containing different amounts of Rb, Sr, and Sr immediately before the formation hardens. This is not necessarily a problem for radiometric dating, because it can be taken into account. Thus they are used for U-Pb dating. Ultimately, the pressures and temperatures are so high that the rocks in the subducted oceanic crust melt. Cortini says geologists discovered that ten times more Ra than the equilibrium value was present in rocks from Vesuvius. This process will generate an igneous rock of yet another composition.
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