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The chromium isotope system as a tracer of ocean and atmosphere redox

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The chromium isotope system as a tracer of ocean and atmosphere redoxKohen W. Bauer ... [et al.].
其他作者:	Bauer, Kohen W.
出版者:	Cambridge :Cambridge University Press,2021.
面頁冊數:	26 p. :ill., digital ;23 cm.
附註:	Title from publisher's bibliographic system (viewed on 05 Feb 2021).
標題:	ChromiumIsotopes.
電子資源:	https://doi.org/10.1017/9781108870443
ISBN:	9781108870443$q(electronic bk.)

The chromium isotope system as a tracer of ocean and atmosphere redox
The chromium isotope system as a tracer of ocean and atmosphere redox[electronic resource] /Kohen W. Bauer ... [et al.]. - Cambridge :Cambridge University Press,2021. - 26 p. :ill., digital ;23 cm. - Cambridge elements. Elements in geochemical tracers in Earth system science,2515-7027. - Cambridge elements.Elements in geochemical tracers in Earth system science..

Title from publisher's bibliographic system (viewed on 05 Feb 2021).

The stable chromium (Cr) isotope system has emerged over the past decade as a new tool to track changes in the amount of oxygen in earth's ocean-atmosphere system. Much of the initial foundation for using Cr isotopes (δ53Cr) as a paleoredox proxy has required recent revision. However, the basic idea behind using Cr isotopes as redox tracers is straightforward-the largest isotope fractionations are redox-dependent and occur during partial reduction of Cr(VI). As such, Cr isotopic signatures can provide novel insights into Cr redox cycling in both marine and terrestrial settings. Critically, the Cr isotope system-unlike many other trace metal proxies-can respond to short-term redox perturbations (e.g., on timescales characteristic of Pleistocene glacial-interglacial cycles). The Cr isotope system can also be used to probe the earth's long-term atmospheric oxygenation, pointing towards low but likely dynamic oxygen levels for the majority of Earth's history.

ISBN: 9781108870443$q(electronic bk.)Subjects--Topical Terms:

981475
Chromium
--Isotopes.

LC Class. No.: QD181.C7

Dewey Class. No.: 546.532

The chromium isotope system as a tracer of ocean and atmosphere redox
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520 $a The stable chromium (Cr) isotope system has emerged over the past decade as a new tool to track changes in the amount of oxygen in earth's ocean-atmosphere system. Much of the initial foundation for using Cr isotopes (δ53Cr) as a paleoredox proxy has required recent revision. However, the basic idea behind using Cr isotopes as redox tracers is straightforward-the largest isotope fractionations are redox-dependent and occur during partial reduction of Cr(VI). As such, Cr isotopic signatures can provide novel insights into Cr redox cycling in both marine and terrestrial settings. Critically, the Cr isotope system-unlike many other trace metal proxies-can respond to short-term redox perturbations (e.g., on timescales characteristic of Pleistocene glacial-interglacial cycles). The Cr isotope system can also be used to probe the earth's long-term atmospheric oxygenation, pointing towards low but likely dynamic oxygen levels for the majority of Earth's history.
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