Facts about radiocarbon dating
Modern Radiometric Dating Techniques Modern radiometric dating uses many different techniques to identify both organic and inorganic objects.For example, uranium-lead experiments are often conducted on older, inorganic objects because uranium-lead conversions have a much longer half-life than other isotopes.While not all objects have the same isotopes, both living and nonliving objects have some sort of decaying, radioactive isotope that can be used based on known decay rates. An isotope of some sort is located and isolated within an object.That isotope is then compared to its decaying product and scientists are able to use known decay rates to determine how old the initial isotope is.For example, in uranium-lead dating, they use rocks containing zircon (Zr Si O Zircon and baddeleyite incorporate uranium atoms into their crystalline structure as substitutes for zirconium, but strongly reject lead.Zircon has a very high closure temperature, is very chemically inert, and is resistant to mechanical weathering.Advantages and Disadvantages Radiometric dating has several important advantages and disadvantages, but is the only practical method scientists currently have for dating objects.
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For these reasons, if a rock strata contains zircon, running a uranium-lead test on a zircon sample will produce a radiometric dating result that is less dependent on the initial quantity problem.
Another assumption is that the rate of decay is constant over long periods of time.
Radiometric dating is a method of determining the age of an artifact by assuming that on average decay rates have been constant (see below for the flaws in that assumption) and measuring the amount of radioactive decay that has occurred.
Radiometric dating is mostly used to determine the age of rocks, though a particular form of radiometric dating—called Radiocarbon dating—can date wood, cloth, skeletons, and other organic material.