Burnard, P. G. (1999) Origin of Argon-Lead Isotopic Correlation in Basalts. Science, 286 (5441). p. 871. ISSN 0036-8075. doi:10.1126/science.286.5441.871a. https://resolver.caltech.edu/CaltechAUTHORS:20141124-100857980
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Abstract
Sarda et al. (1) show that there is a correlation between ^(206)Pb/^(204)Pb and maximum ^(40)Ar/^(36)Ar values in Atlantic basalts. The authors argue that this correlation is due to mixing between a degassed-depleted upper mantle (^(40)Ar/^(36)Ar > 40,000 and ^(206)Pb/^(204)Pb ≈ 17.8) and a recycled component in the mantle (HIMU) that has unradiogenic Ar resulting from recycling of atmospheric Ar (^(40)Ar/^(36)Ar = 300). However, devolatilization of subducting material is well documented in arc environments and it seems extraordinary that Ar, a highly volatile element, can be recycled in significant amounts. I aim to show that the Ar content required of the recycled slab is implausibly high and that most of the variation in Ar isotopic composition could be the result of shallow-level atmospheric contamination.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1999 American Association for the Advancement of Science. | |||||||||
| Issue or Number: | 5441 | |||||||||
| DOI: | 10.1126/science.286.5441.871a | |||||||||
| Record Number: | CaltechAUTHORS:20141124-100857980 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20141124-100857980 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 52092 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 24 Nov 2014 21:28 | |||||||||
| Last Modified: | 10 Nov 2021 19:20 |
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