A critical look at iron paleoredox proxies: New insights from modern euxinic marine basins
TW Lyons, S Severmann - Geochimica et Cosmochimica Acta, 2006 - Elsevier
Enrichments in reactive iron occur under euxinic marine conditions, that is, where dissolved
sulfide is present in the water column. These enrichments result primarily from the export of …
sulfide is present in the water column. These enrichments result primarily from the export of …
[PDF][PDF] The iron paleoredox proxies: A guide to the pitfalls, problems and proper practice
Oceanic anoxia---including euxinic settings defined by the presence of water column
hydrogen sulfide (H~ 2~ S)---is minor in the ocean today. Such conditions, however, were …
hydrogen sulfide (H~ 2~ S)---is minor in the ocean today. Such conditions, however, were …
[图书][B] The iron speciation paleoredox proxy
SW Poulton - 2021 - cambridge.org
In one form or another, iron speciation has had a long history as a paleoredox proxy. The
technique has been refined considerably over the years, and the most recent scheme is …
technique has been refined considerably over the years, and the most recent scheme is …
Modern iron isotope perspective on the benthic iron shuttle and the redox evolution of ancient oceans
The increase in atmospheric oxygen ca. 2.4 Ga had a significant impact on the geochemical
cycling of Fe. The history of environmental oxygenation may be recorded in the Fe isotope …
cycling of Fe. The history of environmental oxygenation may be recorded in the Fe isotope …
[HTML][HTML] A global reassessment of the controls on iron speciation in modern sediments and sedimentary rocks: A dominant role for diagenesis
The speciation of iron in sediments and sedimentary rocks is a widely used proxy for the
chemistry and oxidation state of ancient water bodies. Specifically, the fraction of reactive …
chemistry and oxidation state of ancient water bodies. Specifically, the fraction of reactive …
Reactive iron enrichment in sediments deposited beneath euxinic bottom waters: constraints on supply by shelf recycling
R Raiswell, TF Anderson - Geological Society, London, Special …, 2005 - lyellcollection.org
Modern and ancient euxinic sediments are often enriched in iron that is highly reactive
towards dissolved sulphide, compared to continental margin and deep-sea sediments. It is …
towards dissolved sulphide, compared to continental margin and deep-sea sediments. It is …
Reactive iron in Black Sea sediments: implications for iron cycling
JWM Wijsman, JJ Middelburg, CHR Heip - Marine Geology, 2001 - Elsevier
The distribution of reactive iron in sediments of the northwestern shelf, the shelf edge and
the abyssal part of the Black Sea has been studied. In the euxinic Black Sea, iron sulfides …
the abyssal part of the Black Sea has been studied. In the euxinic Black Sea, iron sulfides …
Iron isotope and trace metal records of iron cycling in the proto‐North Atlantic during the Cenomanian‐Turonian oceanic anoxic event (OAE‐2)
The global carbon cycle during the mid‐Cretaceous (∼ 125–88 million years ago, Ma)
experienced numerous major perturbations linked to increased organic carbon burial under …
experienced numerous major perturbations linked to increased organic carbon burial under …
The manganese and iron shuttle in a modern euxinic basin and implications for molybdenum cycling at euxinic ocean margins
A meaningful application of Mo as a paleo-redox proxy requires an understanding of Mo
cycling in modern reducing environments. Stagnant euxinic basins such as the Black Sea …
cycling in modern reducing environments. Stagnant euxinic basins such as the Black Sea …
The global iron cycle
Iron is a redox-sensitive element. It forms poorly soluble iron oxyhydroxides in the presence
of O2, poorly soluble iron sulfides in the presence of dissolved sulfide, but soluble Fe (II) …
of O2, poorly soluble iron sulfides in the presence of dissolved sulfide, but soluble Fe (II) …