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Title: Relation of vanadium and nickel in bitumen to the depositional environment of the Meade-Peak Member, Phosphoria Formation, southeastern Idaho

Abstract

Forty six siltstone, phosphorite, and shale samples from different stratigraphic and geographic positions from the Meade Peak Member of the Phosphoria Formation in southeastern Idaho were extracted for bitumen content. Subsequently, contents were analyzed by instrumental neutron activation analysis for trace elements in order to relate the abundance and ratio of V and Ni to the depositional environments of the Meade Peak Member in the study area. High V and low Ni concentration (V/Ni+V > 0.90) may be found in bitumen extracted from organic matter from shale. The low Ni concentration in bitumen samples might be related to precipitation as NiS in the mineral phase. A large amount of H[sub 2]S may have been produced during oxidation of organic matter by the sulfate-reducing bacteria under anoxic conditions, where only vanadyl cations were available for metallation with organic matter. Organic matter would be preserved under these conditions, and its remaining amount in shale would be high and hydrogen-rich, resulting in high V/Ni+V ratio (close to unity). Varied Ni and V concentration (V/Ni+V range from 0.10-0.90) was found in bitumen extracted from organic matter from phosphorite. The variation in the concentrations might be related, in part, to precipitation of V and Nimore » in the mineral phase under suboxic conditions, where both vanadyl and nickelous cation proportions were available for metallation with organic matter. Organic matter would have been partially preserved during deposition under these conditions. Its remaining amount in phosphorite would be low to moderately high and would be intermediate in composition, resulting in variation in the V/Ni+V ratio from 0.10 to 0.90. High Ni and low V concentration (V/Ni+V < 0.10) was found in bitumen extracted from siltstone. The low V concentration might be related to nearly complete precipitation as vanadate under oxic conditions, where only nickelous cations were available for metallation with organic matter.« less

Authors:
Publication Date:
Research Org.:
Idaho Univ., Moscow, ID (United States)
OSTI Identifier:
7028501
Resource Type:
Miscellaneous
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
04 OIL SHALES AND TAR SANDS; BITUMENS; CHEMICAL COMPOSITION; NICKEL; CONCENTRATION RATIO; ORGANIC MATTER; DIAGENESIS; VANADIUM; ELEMENTS; MATTER; METALS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; TAR; TRANSITION ELEMENTS; 040200* - Oil Shales & Tar Sands- Reserves, Geology, & Exploration

Citation Formats

Sharata, S M. Relation of vanadium and nickel in bitumen to the depositional environment of the Meade-Peak Member, Phosphoria Formation, southeastern Idaho. United States: N. p., 1993. Web.
Sharata, S M. Relation of vanadium and nickel in bitumen to the depositional environment of the Meade-Peak Member, Phosphoria Formation, southeastern Idaho. United States.
Sharata, S M. 1993. "Relation of vanadium and nickel in bitumen to the depositional environment of the Meade-Peak Member, Phosphoria Formation, southeastern Idaho". United States.
@article{osti_7028501,
title = {Relation of vanadium and nickel in bitumen to the depositional environment of the Meade-Peak Member, Phosphoria Formation, southeastern Idaho},
author = {Sharata, S M},
abstractNote = {Forty six siltstone, phosphorite, and shale samples from different stratigraphic and geographic positions from the Meade Peak Member of the Phosphoria Formation in southeastern Idaho were extracted for bitumen content. Subsequently, contents were analyzed by instrumental neutron activation analysis for trace elements in order to relate the abundance and ratio of V and Ni to the depositional environments of the Meade Peak Member in the study area. High V and low Ni concentration (V/Ni+V > 0.90) may be found in bitumen extracted from organic matter from shale. The low Ni concentration in bitumen samples might be related to precipitation as NiS in the mineral phase. A large amount of H[sub 2]S may have been produced during oxidation of organic matter by the sulfate-reducing bacteria under anoxic conditions, where only vanadyl cations were available for metallation with organic matter. Organic matter would be preserved under these conditions, and its remaining amount in shale would be high and hydrogen-rich, resulting in high V/Ni+V ratio (close to unity). Varied Ni and V concentration (V/Ni+V range from 0.10-0.90) was found in bitumen extracted from organic matter from phosphorite. The variation in the concentrations might be related, in part, to precipitation of V and Ni in the mineral phase under suboxic conditions, where both vanadyl and nickelous cation proportions were available for metallation with organic matter. Organic matter would have been partially preserved during deposition under these conditions. Its remaining amount in phosphorite would be low to moderately high and would be intermediate in composition, resulting in variation in the V/Ni+V ratio from 0.10 to 0.90. High Ni and low V concentration (V/Ni+V < 0.10) was found in bitumen extracted from siltstone. The low V concentration might be related to nearly complete precipitation as vanadate under oxic conditions, where only nickelous cations were available for metallation with organic matter.},
doi = {},
url = {https://www.osti.gov/biblio/7028501}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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