The uranium isotope paleoredox proxy

Kimberly V. Lau; Stephen J. Romaniello; Feifei Zhang

doi:10.1017/9781108584142

The uranium isotope paleoredox proxy

Kimberly V. Lau, Stephen J. Romaniello, Feifei Zhang

Geosciences

Research output: Book/Report › Book

37 Scopus citations

Abstract

Uranium isotopes (238U/235U) have emerged as a proxy to reconstruct the redox conditions of the Earth's oceans and atmosphere based upon the large isotopic fractionation between reduced U(IV) and oxidized U(VI). Variations in 238U/235U, particularly when recorded in carbonate sediments, can track global trends in marine oxygenation and de-oxygenation. It is unique from other proxies because reduction primarily occurs at the sediment-water interface, and this sensitivity makes U isotopes especially relevant for the habitability of benthic animals. This Element covers the background, methods, and case studies of this promising tool for understanding Earth's environmental transitions, as rapid development continues to refine the accuracy of interpretations of 238U/235U records.

Original language	English (US)
Publisher	Cambridge University Press
Number of pages	30
ISBN (Electronic)	9781108584142
ISBN (Print)	9781108731119
DOIs	https://doi.org/10.1017/9781108584142
State	Published - Aug 12 2019

All Science Journal Classification (ASJC) codes

General Earth and Planetary Sciences

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1017/9781108584142

Cite this

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title = "The uranium isotope paleoredox proxy",

abstract = "Uranium isotopes (238U/235U) have emerged as a proxy to reconstruct the redox conditions of the Earth's oceans and atmosphere based upon the large isotopic fractionation between reduced U(IV) and oxidized U(VI). Variations in 238U/235U, particularly when recorded in carbonate sediments, can track global trends in marine oxygenation and de-oxygenation. It is unique from other proxies because reduction primarily occurs at the sediment-water interface, and this sensitivity makes U isotopes especially relevant for the habitability of benthic animals. This Element covers the background, methods, and case studies of this promising tool for understanding Earth's environmental transitions, as rapid development continues to refine the accuracy of interpretations of 238U/235U records.",

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AU - Romaniello, Stephen J.

AU - Zhang, Feifei

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AB - Uranium isotopes (238U/235U) have emerged as a proxy to reconstruct the redox conditions of the Earth's oceans and atmosphere based upon the large isotopic fractionation between reduced U(IV) and oxidized U(VI). Variations in 238U/235U, particularly when recorded in carbonate sediments, can track global trends in marine oxygenation and de-oxygenation. It is unique from other proxies because reduction primarily occurs at the sediment-water interface, and this sensitivity makes U isotopes especially relevant for the habitability of benthic animals. This Element covers the background, methods, and case studies of this promising tool for understanding Earth's environmental transitions, as rapid development continues to refine the accuracy of interpretations of 238U/235U records.

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The uranium isotope paleoredox proxy

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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