Journal article
Climatic control of riverine and seawater uranium-isotope ratios.
- Abstract:
- The large variation in the ratio of uranium-234 to uranium-238 (234U/238U) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (234U/238U). Here, we demonstrate the importance of physical weathering and rainfall for (234U/238U), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (234U/238U) 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 (234U/238U) during glacial cycles indicates that rejection of corals based on modern (234U/238U) +/- <0.01 is not merited and may reject the highest quality ages.
- Publication status:
- Published
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Authors
- Journal:
- Science (New York, N.Y.) More from this journal
- Volume:
- 305
- Issue:
- 5685
- Pages:
- 851-854
- Publication date:
- 2004-08-01
- DOI:
- EISSN:
-
1095-9203
- ISSN:
-
0036-8075
- Language:
-
English
- Pubs id:
-
pubs:82200
- UUID:
-
uuid:944fb8a8-3f58-42df-93f7-4a8a213c352a
- Local pid:
-
pubs:82200
- Source identifiers:
-
82200
- Deposit date:
-
2012-12-19
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- Copyright date:
- 2004
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