Lead isotope compositions and uranium decay series disequilibrium in recent volcanic rocks. Earth Planet. Sci. Lett., 5: 199-206.Oversby, V.M., Gast, P.W., 1968. Lead isotope compositions and uranium decay series disequilibrium in recent volcanic rocks. Earth Planet. Sci. Lett. 5, 199-...
Uranium decay is an isotope function, with (i) 238U92 decaying by α-emission to 234Th90 (half-life of 4.45 × 109 years) and then by two successive β-emissions (half-life of 24.1 days and half-life of 1.18 minutes) to yield 234U. 234U ...
Dating methods ; Elements: trace ; Geochronology and radioisotopes ; Lead: Stable isotopes ; Oklo natural nuclear reactor ; Uranium–lead thorium–lead decay systemElements: actinide series ; Elements: heat producing ; Elements:... CW Montgomery - Springer Netherlands 被引量: 53发表: ...
Uranium-238 has a half-life of 4.468 billion years over which time it decays into stable lead-206. This process can be used to date ancient rocks by comparing the ratio of the isotope lead-206, the last isotope in the uranium decay series, to the level of uranium-238 in the sample of...
Uranium-238 is an α emitter, decaying through the 18-member uranium natural decay series into lead-206.[10] The decay series of uranium-235 (also called actino-uranium) has 15 members that ends in lead-207.[10] The constant rates of decay in these series makes comparison of the ratios...
These long half-lives make determinations of the age of Earth possible by measuring the amounts of lead, uranium’s ultimate decay product, in certain uranium-containing rocks. Uranium-238 is the parent and uranium-234 one of the daughters in the radioactive uranium decay series; uranium-235 ...
Uranium-235 is also known as Actinouranium as it is the parent isotope of the Actinium Series. It produces Lead as the final stable element of this Alpha decay chain. Here is the complete decay series of this isotope: Uranium-235 →Thorium-231 → Protactinium-231 →Actinium-227 →Thorium-...
For this reason, age determination of fossil marine carbonates by uranium decay series disequilibrium measurements, although apparently sometimes applicable to fossil corals and other fossil marine carbonates that have formed and have remained in a marine environment, is not likely to give reliable ...
Uranium–lead dating. A geochronological method that uses final decay products in the238U and235U radioactive decay chains to determine the length of time required to accumulate present amounts of stable daughter isotopes206Pb and207Pb, respectively. ...
The meaning of URANIUM 238 is an isotope of uranium of mass number 238 that is the most stable uranium isotope, that constitutes over 99 percent of natural uranium, that is not fissile but can be used to produce a fissile isotope of plutonium, and that h