Radiogenic Age Dating

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The use of radiometric dating was first published in 1907 by Bertram Boltwood and is now the principal source of information about the absolute age of rocks and other geological features, including the age of fossilized life forms or the age of the Earth itself, and can also be used to date a wide range of natural and man-made materials .
It provided a means by which the age of the Earth could be determined independently . Principles of Radiometric Dating . Radioactive decay is described in terms of the probability that a constituent particle of the nucleus of an atom will escape through the potential (Energy) barrier which bonds them to the nucleus .
Radiometric age dating should no longer be sold to the public as providing reliable, absolute ages . Excess argon invalidates the initial condition assumption for potassium dating , and excess helium invalidates the closed-system assumption for uranium dating . The ages shown on the uniformitarian geologic time scale should be removed .
The earth is billions of years old . The most useful methods for measuring the ages of geologic materials are the radiometric methods-the ones that make use of radioactive parent isotopes and their stable daughter products, as preserved in rocks, minerals, or other geologic materials . The main condition for the method is that the production rate of isotopes stays the same through ages , i .e . . .
There are at least 67 different uniformitarian (the present is the key to the past) methods of dating the earth other than long- age radiometric dating : each of which yield ages of less than 500 million years . 1 Of these other methods, 44 yield maximum ages of less than one million years and 23 others yield (max) ages of one million to 500 million years .1 Yet all these other science-based methods that point to a much younger age than 4 .5 billion years for earth's age are ignored or rejected . . .
•Each age-dating scheme involves precise measurement of the concentration of an isotope . . . . approximately the same abundance as the radiogenic product 87Sr, and is chosen for normalization . •In a magmatic rock, the isotopic ratio 87Sr/86Sr is uniform, while the proportion of element Rb & Sr
First, the various isotope combinations used in the isochron method of dating are clearly discordant—they do not produce the same age for a given rock formation . 5 Second, the isochron method gives erroneous ages for rock formations of known age . 6 Specifically, rocks gathered from recently erupted Mt . Ngauruhoe in New Zealand gave a K-Ar . . .
"Even taking into account the uncertainties of the analytical data, there is a definite excess of radiogenic argon and helium present, particularly evident for samples of historic age " (" Radiogenic Helium and Argon in Ultramafic Inclusions From Hawaii," Vol . 73, Issue 14, July 15, 1968, p . 4602) .
When a standard of known age is co-irradiated with the unknown samples, a single measurement of argon isotopes can be used to calculate the 40 K/ 40 Ar* ratio (i .e ., ratio of radiogenic Ar versus 40 Ar from radioactive decay of 40 K), and thus to calculate the age of the unknown sample .
Potassium-argon dating , abbreviated K-Ar dating , is a radiometric dating method used in geochronology and archaeology . It is based on measurement of the product of the radioactive decay of an isotope of potassium into argon . Potassium is a common element found in many materials, such as feldspars, micas, clay minerals, tephra, and evaporites . In these materials, the decay product 40 Ar is able to escape the liquid rock, but starts to accumulate when the rock solidifies . The amount of . . .
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Radiogenic Age Dating