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Books > Earth & environment > Earth sciences > Palaeontology
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The Chromium Isotope System as a Tracer of Ocean and Atmosphere Redox (Paperback)
Loot Price: R611
Discovery Miles 6 110
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The Chromium Isotope System as a Tracer of Ocean and Atmosphere Redox (Paperback)
Series: Elements in Geochemical Tracers in Earth System Science
Expected to ship within 12 - 19 working days
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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 ( 53Cr) 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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