Robinson, Laura F. and Henderson, Gideon M. and Hall, Lisa and Matthews, Iain (2004) Climatic Control of Riverine and Seawater Uranium-Isotope Ratios. Science, 305 (5685). pp. 851-854. ISSN 0036-8075. doi:10.1126/science.1099673. https://resolver.caltech.edu/CaltechAUTHORS:20141202-103840474
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Abstract
The large variation in the ratio of uranium-234 to uranium-238 (^(234)U/^(238)U) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (^(234)U/^(238)U). Here, we demonstrate the importance of physical weathering and rainfall for (^(234)U/^(238)U), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (^(234)U/^(238)U) record and suggest that New Zealand glacier advance 13,000 years ago was influenced by increased rainfall rather than by Younger Dryas–like cooling. A model of seawater (^(234)U/^(238)U) during glacial cycles indicates that rejection of corals based on modern (^(234)U/^(238)U) ± <0.01 is not merited and may reject the highest quality ages.
| Item Type: | Article | ||||||||||||
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| Additional Information: | © 2004 American Association for the Advancement of Science. 27 April 2004; Accepted 7 July 2004. We thank the Gary Comer Fellowship program for financial support and N. Belshaw for help in the laboratory. | ||||||||||||
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| Issue or Number: | 5685 | ||||||||||||
| DOI: | 10.1126/science.1099673 | ||||||||||||
| Record Number: | CaltechAUTHORS:20141202-103840474 | ||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20141202-103840474 | ||||||||||||
| Official Citation: | Robinson, L. F., Henderson, G. M., Hall, L., & Matthews, I. (2004). Climatic Control of Riverine and Seawater Uranium-Isotope Ratios. Science, 305(5685), 851-854. doi: 10.1126/science.1099673 | ||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
| ID Code: | 52264 | ||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||
| Deposited By: | INVALID USER | ||||||||||||
| Deposited On: | 02 Dec 2014 21:14 | ||||||||||||
| Last Modified: | 10 Nov 2021 19:23 |
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