Abstract The early Toarcian Oceanic Anoxic Event (Jenkyns Event) was associated with
major world-wide climatic changes with profound effects on the global carbon cycle. This …

Iron-bearing nanominerals such as ferrihydrite, schwertmannite, and green rust behave as
metastable precursors leading to the formation of more thermodynamically stable iron …

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 …

Although redox conditions are the dominant control on authigenic enrichment of trace metals
in marine sediments, other factors may be important within environments having relatively …

Rapidly spreading industrialization since the 19th century has led to a drastic increase in
trace metal deposition in coastal sediments. Provided that these trace metals have remained …

Iron speciation is one of the most widely applied proxies used to reconstruct oxygen levels
and redox conditions in past aqueous environments. The iron speciation proxy estimates …

Continental shelves are a major source of iron (Fe) and manganese (Mn) to marine waters.
Here, we investigate controls on benthic release of Fe and Mn and the impact on the water …

Sedimentary molybdenum (Mo) and uranium (U) enrichments are widely used to reconstruct
changes in bottom water oxygen conditions in aquatic environments. Until now, most studies …

Reactive iron (Fe) oxides in marine sediments may represent a source of bioavailable Fe to
the ocean via reductive dissolution and sedimentary Fe release or can promote organic …

Oxygen depletion in coastal waters may lead to release of toxic sulfide from sediments.
Cable bacteria can limit sulfide release by promoting iron oxide formation in sediments …