Redox conditions associated with organic carbon accumulation in the Late Devonian New Albany Shale, west-central Kentucky, Illinois Basin

Variations in redox indications obtained from different proxies suggest that multiple parameters should be utilized rather than relying on a single proxy. Reasonably good agreement is seen between C-S, DOPT, C-S-Fe, and Mo levels; Ni/Co and V/Cr tend to agree well with each other, but suggest higher oxygen levels than the other proxies. Values for V/(V + Ni) tend to be an outlier, suggesting more anoxic (to euxinic) conditions compared to other proxies.