U-Pb chronology of the Solar System's oldest solids with variable 238 U/ 235 U
Accurate determination of the absolute ages of the oldest Solar System objects - chondrules and Ca-Al-rich inclusions (CAIs), requires knowledge of their 238U/235U ratios. This ratio was assumed to be invariant in all U-Pb dating of meteorites so far, but the recent discovery of U isotope variations in CAIs (Brennecka et al., 2010a) shows that this assumption is invalid. We present the first combined high-precision U and Pb isotopic data for a CAI, and U isotopic data for chondrules and whole...[Show more]
|Collections||ANU Research Publications|
|Source:||Earth and Planetary Science Letters|
|Access Rights:||Open Access|
|Amelin_U-Pb chronology_2010.pdf||525.48 kB||Adobe PDF|
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