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Geochemical controls of vanadium accumulation in fossil fuels

January 1, 1989

High vanadium contents in petroleum and other fossil fuels have been attributed to organic-matter type, organisms, volcanic emanations, diffusion of sea water, and epigenetic enrichment. However, these factors are inadequate to account for the high abundance of vanadium in some fossil fuels and the paucity in others. By examining vanadium deposits in sedimentary rocks with sparse organic matter, constraints are placed on processes controlling vanadium accumulation in organic-rich sediments. Vanadium, as vanadate (V(V)), entered some depositional basins in oxidizing waters from dry, subaerial environments. Upon contact with organic matter in anoxic waters, V(V) is reduced to vanadyl (V(IV)), which can be removed from the water column by adsorption. H2S reduces V(IV) to V(III), which hydrolyzes and precipitates. The lack of V(III) in petroleum suggests that reduction of V(IV) to V(III) is inhibited by organic complexes. In the absence of strong complexing agents, V(III) forms and is incorporated in clay minerals.

Citation Information

Publication Year 1989
Title Geochemical controls of vanadium accumulation in fossil fuels
DOI
Authors G.N. Breit, R. B. Wanty
Publication Type Conference Paper
Publication Subtype Conference Paper
Series Title
Series Number
Index ID 70015695
Record Source USGS Publications Warehouse
USGS Organization