The hyper-enrichment of V and Zn in black shales of the Late Devonian-Early Mississippian Bakken Formation (USA)
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Abstract
Black shales of the Late Devonian to Early Mississippian Bakken Formation are characterized by high concentrations of organic carbon and the hyper-enrichment (> 500 to 1000s of mg/kg) of V and Zn. Deposition of black shales resulted from shallow seafloor depths that promoted rapid development of euxinic conditions. Vanadium hyper-enrichments, which are unknown in modern environments, are likely the result of very high levels of dissolved H2S (~ 10 mM) in bottom waters or sediments. Because modern hyper-enrichments of Zn are documented only in Framvaren Fjord (Norway), it is likely that the biogeochemical trigger responsible for Zn hyper-enrichment in Framvaren Fjord was also present in the Bakken basin. With Framvaren Fjord as an analogue, we propose a causal link between the activity of phototrophic sulfide oxidizing bacteria, related to the development of photic-zone euxinia, and the hyper-enrichment of Zn in black shales of the Bakken Formation.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The hyper-enrichment of V and Zn in black shales of the Late Devonian-Early Mississippian Bakken Formation (USA) |
| Series title | Chemical Geology |
| DOI | 10.1016/j.chemgeo.2017.01.026 |
| Volume | 452 |
| Year Published | 2017 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Eastern Energy Resources Science Center, Eastern Mineral and Environmental Resources Science Center |
| Description | 10 p. |
| First page | 24 |
| Last page | 33 |
| Country | Canada, United States |
| State | Manitoba, Montana, North Dakota, Saskatchewan, South Dakota, Wyoming |
| Google Analytic Metrics | Metrics page |