ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Radioactive decay of uranium and thorium produces 4He, whereas 3He in the Earth’s mantle is not produced by radioactive decay and was only incorporated during accretion—that is, it is primordial. 3He/4He ratios in many ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/nature06240
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