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Series:   Elements in Geochemical Tracers in Earth System Science

The Pyrite Trace Element Paleo-Ocean Chemistry Proxy

Published online by Cambridge University Press:  28 November 2020

Daniel D. Gregory
Daniel D. Gregory
Affiliation:
University of Toronto

Summary

The use of the trace element content of sedimentary pyrite as a proxy for the trace element composition of past oceans has recently emerged. The pyrite proxy has several potential advantages over bulk sample analysis: preservation through metamorphism; little dilution during analysis (samples are ablated not dissolved, allowing for the less abundant elements commonly held in the sulfide fraction to be investigated as proxies); accurate measurement of several elements simultaneously; the ability to screen sediments for hydrothermal overprint; and the technique can give information regarding trace element availably at multiple stages of diagenesis. Because of these multiple strengths, the pyrite trace element proxy is a valuable potential addition to the paleo-ocean chemistry tool kit.
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Keywords

LA-ICPMSpyritepaleoredoxchalcophileocean chemistry

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Type
Element
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Series: Elements in Geochemical Tracers in Earth System Science
Online ISBN: 9781108846974
Publisher: Cambridge University Press
Print publication: 24 December 2020

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References

Key References

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These papers were among the first to compile LA-ICPMS trace element data of pyrite and showed that it matches existing whole rock studies.Google Scholar
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These papers provide examples where the proxy was used to identify oxygenation events at different times in Earth History.Google Scholar
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This paper shows how trace element content of pyrite can be used to distinguish between sedimentary pyrite and hydrothermal pyrite.Google Scholar
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This paper shows how the trace element content of pyrite in pyrite nodules can be used to obtain information of pore water chemistry during diagenesis.Google Scholar
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