Secular Variation of Iron Isotopes in North Atlantic Deep Water

A high-precision iron isotope time series for a ferromanganese crust demonstrates that the iron isotope composition in North Atlantic Deep Water has changed substantially over the past 6 million years and that iron isotope variations in the crust are closely correlated to those of lead isotopes. The...

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Bibliographic Details
Published in:Science
Main Authors: Zhu, Xiang-Kun, O'Nions, R. Keith, Guo, Yueling, Reynolds, Ben C.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2000
Subjects:
North Atlantic Deep Water
North Atlantic
Online Access:http://dx.doi.org/10.1126/science.287.5460.2000
https://www.science.org/doi/pdf/10.1126/science.287.5460.2000
Description
Summary:A high-precision iron isotope time series for a ferromanganese crust demonstrates that the iron isotope composition in North Atlantic Deep Water has changed substantially over the past 6 million years and that iron isotope variations in the crust are closely correlated to those of lead isotopes. The close correlation between the two isotope series indicates that the observed iron isotope variations predominantly reflect those of iron input from terrigenous sources and provides no evidence for biologically induced mass fractionation within North Atlantic Deep Water.

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