Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation

Uranium in the deep sea The ratio of 234 U to 238 U in seawater underlies modern marine uranium-thorium geochronology, but it is difficult to establish the ratio precisely. Chen et al. report two 234 U/ 238 U records derived from deep-sea corals (see the Perspective by Yokoyama and Esat). The record...

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Bibliographic Details
Published in:Science
Main Authors: Chen, Tianyu, Robinson, Laura F., Beasley, Matthew P., Claxton, Louis M., Andersen, Morten B., Gregoire, Lauren J., Wadham, Jemma, Fornari, Daniel J., Harpp, Karen S.
Other Authors: European Research Council, Natural Environment Research Council, Philip Leverhulme Trust, U.S. National Science Foundation, Marie Curie Reintegration Grant, NOAA (National Oceanic and Atmospheric Administration) Ocean Exploration Trust
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2016
Subjects:
Ice Sheet
Online Access:http://dx.doi.org/10.1126/science.aag1015
https://www.science.org/doi/pdf/10.1126/science.aag1015
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Summary:Uranium in the deep sea The ratio of 234 U to 238 U in seawater underlies modern marine uranium-thorium geochronology, but it is difficult to establish the ratio precisely. Chen et al. report two 234 U/ 238 U records derived from deep-sea corals (see the Perspective by Yokoyama and Esat). The records reveal a number of important similarities to and differences from existing records of the past 30,000 years. Higher values during the most recent 10,000 years than during earlier glaciated conditions may reflect enhanced subglacial melting during deglaciation. Science , this issue p. 626 see also p. 550

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