Age of meteorites and the earth
1956; Elsevier BV; Volume: 10; Issue: 4 Linguagem: Inglês
10.1016/0016-7037(56)90036-9
ISSN1872-9533
Autores Tópico(s)Planetary Science and Exploration
ResumoWithin experimental error, meteorites have one age as determined by three independent radiometric methods. The most accurate method (Pb207/Pb206 gives an age of 4.55 ± 0.07 × 109 yr. Using certain assumptions which are apparently justified, one can define the isotopic evolution of lead for any meteoritic body. It is found that earth lead meets the requirements of this definition. It is therefore believed that the age for the earth is the same as for meteorites. This is the time since the earth attained its present mass
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