Dear Mr. Bowen,

Yes you can.

The classical examples are bivalent and trivalent Fe accommodated in various minerals, e.g., carbonate minerals (only accept bivalent Fe) and Mn showing various valence states. Other trace elements are e.g. the V/Cr ratio, Ni, Co, and Mo which can be used to constrain the redox conditions . The same holds true for Se and S which show a different behaviour during redox conditions. I refer to the geochemical diagrams in Brookins (2013): Eh-pH Diagrams for Geochemistry.

Good luck

H.G.Dill

Thanks, professor.I still have a question. The formation condition of diagenetic concretions or nodules is in the pore water rather than the sedimentary rocks in the bottom water. Is the conclusion based on the data the pore water or bottom water redox condition?

Dear Mr. Bowen,

we deal with intrastratal fluids which are accountable for the formation of concretions regardless of their morphology and terminology. In case of an reducing regime you will recognize this Eh also in the trace element contents of the minerals in question.

Kind regards

H.G.Dill