Radiometric Dating Of Meteorites

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Radiometric Dating Does Work! | National Center for . . .
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Andrew Snelling concedes, radiometric dating of meteorites . . .
Andrew Snelling concedes, radiometric dating of meteorites . . .
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Because of their importance, meteorites have been extensively dated radiometrically; the vast majority appear to be 4 .4-4 .6 Ga (billion years) old . Some meteorites , because of their mineralogy, can be dated by more than one radiometric dating technique, which provides scientists with a powerful check of the validity of the results .
Principles of Radiometric Dating . . . . (11) we can make some arguments about meteorites . First, it appears that meteorites have come from somewhere in the solar system, and thus may have been formed at the same time the solar system (and thus the Earth) formed . If all of the meteorites formed at the same time and have been closed to U and Pb . . .
Many radioisotope dating studies of groups of asteroidal meteorites (chondrites, stony achondrites, pallasites and mesosiderites, and irons) in the last six decades have used the Rb-Sr, Sm-Nd, U-Th-Pb, Lu-Hf, Re-Os, Mn-Cr, and Hf-W methods to yield many isochron ages of groups of these meteorites from whole-rock samples, and mineral and other fractions .
Meteorites date the earth with a 4 .55 ± 0 .07 Ga Pb-Pb isochron called the geochron . They appear to consistently yield 4 .55-4 .57 Ga radioisotope ages, adding to the uniformitarians' confidence in the radioisotope dating methods . Achondrites, meteorites not containing chondrules, account for about 8% of meteorites overall .
Wouldn't radioactive decay have already been occurring in all of those meteorites long before they hit earth or our moon? Yes . We have an assumption that the Earth formed at about the same time as the meteorites . The age obtained for meteorites is not the time when they hit the Earth, it is the time when they formed .
Andrew Snelling concedes, radiometric dating of meteorites is solid . May 24, 2014 · by ageofrocks · in Age of the Earth, Geochronology . · . Figure 18 from Snelling (2014), illustrating the frequency of isochron ages obtained from the Allende CV3 carbonaceous chondrite meteorite via six independent radioisotope systems (color coded, in legend) .
Andrew Snelling concedes, radiometric dating of meteorites is solid . Figure 18 from Snelling (2014), illustrating the frequency of isochron ages obtained from the Allende CV3 carbonaceous chondrite meteorite via six independent radioisotope systems (color coded, in legend) . Note the strong peak at 4 .56 Ga, the conventional age of our solar system . . .
The basic theory of radiometric dating is briefly reviewed . Since 1955 the estimate for the age of the Earth has been based on the assumption that certain meteorite lead isotope ratios are equivalent to the primordial lead isotope ratios on Earth . In 1972 this assumption was shown to be highly questionable .
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"You refer to extinct nuclides 14C, 26Al, and 129I . Only the latter two "extinct" nuclides are used in dating . The use of 14C in meteorite dating is solely based on its production by cosmic rays (and for terrestrial samples, with its production in the atmosphere) . 26Al and some other nuclides not mentioned are also used in this way .
Radiometric dating , radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed . The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay . The use of radiometric dating was first published in 1907 by Bertram Boltwood and is now t
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Radiometric Dating Of Meteorites