Geochemistry of Permian rocks from the margins of the Phosphoria Basin: Lakeridge core, western Wyoming

Perkins, Robert B.; McIntyre, Brandie R.; Hein, James R.; Piper, David Z.

doi:10.3133/ofr0321

Cited by 2 publications

(5 citation statements)

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“…Early studies were to evaluate the economic resources of this deposit which is enriched in many metals, define its origin, and aid in exploration for similar deposits [70]. REE and trace element data were used in many of the studies to define the origin [69][70][71]73,74]. Later studies focused on reaction pathways, transport, and fate of potentially toxic trace elements (Se, Cd, Tl, Hg, As, etc.)…”

Section: Ree Analyses Of Permian Phosphoria Formation Datamentioning

confidence: 99%

“…In the study, dilute H 2 SO 4 and HCl, extracted nearly 100% of the total REE content of the phosphorite samples in leaching experiments [75]. give the approximate location of the sample sites for which samples have been analyzed for major-element oxides and trace elements in previous studies [66,67,69,70,74,75,77]. Red filled squares are sites that had samples with greater than 100 ppm concentration of Tl.…”

Section: Ree Analyses Of Permian Phosphoria Formation Datamentioning

confidence: 99%

“…For this study, data from several studies carried out by the USGS and the Wyoming State Geological Survey of the Phosphoria Formation in ID, WY and MT [64][65][66][67][73][74][75][76][77] was examined. Figure 10 shows the locations of samples sites and the approximate location of this study; map shows approximate location of the Permian age rock.…”

Section: Ree Analyses Of Permian Phosphoria Formation Datamentioning

confidence: 99%

“…The U.S. Geological Survey (USGS) studied the Permian Phosphoria Formation and related rock units in the Western U.S. Phosphate Field in southeast Idaho, southwest Wyoming, and southwest Montana ( Figure 10) throughout much of the twentieth century [20][21][22][64][65][66][67][68][69][70][71][72][73][74][75][76][77]. The deposit has been a major phosphate resource for agricultural fertilizer [70].…”

Section: Ree Analyses Of Permian Phosphoria Formation Datamentioning

confidence: 99%

“…Some maximum values include: 857 ppm As, 22 ppm Ag, 3000 ppm Ba, 3000 ppm Cd, 150 ppm Co, 30,800 ppm Cr, 1.6 ppm Hg, 16,000 ppm Mn, 280 ppm Mo, >1000 ppm Ni, 668 ppm Pb, 1200 ppm Se, 130 ppm Tl, 328 ppm U, 35,840 ppm V, 1600 ppm Y, 15,000 ppm Zn and 2158 REE ppm [20,21,[64][65][66][67][68][69][70][71][72][73][74][75]. Analyses of the Mn nodule used in Figure 11 above from a U.S. Geological Survey study near Dillon, MT had low total REE but high compositions of other metals: 400 ppm As, 1200 ppm Cd, 2200 ppm Co, 70 ppm Mo, 13,000 ppm Ni, 1 ppm Te, 1000 ppm Tl, 700 ppm V, and 25,000 ppm Zn [66].…”

Section: Concentration Of Metals In the Phosphoria Formation And In Tmentioning

confidence: 99%

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Possible Involvement of Permian Phosphoria Formation Oil as a Source of REE and Other Metals Associated with Complex U-V Mineralization in the Northern Bighorn Basin?

Moore-Nall

Tsosie

2017

Minerals

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Abstract:The origin of V, U, REE and other metals in the Permian Phosphoria Formation have been speculated and studied by numerous scientists. The exceptionally high concentrations of metals have been interpreted to reflect fundamental transitions from anoxic to oxic marine conditions. Much of the oil in the Bighorn Basin, is sourced by the Phosphoria Formation. Two of the top 10 producing oil fields in Wyoming are located approximately 50 km west of two abandoned U-V mining districts in the northern portion of the basin. These fields produce from basin margin anticlinal structures from Mississippian age reservoir rock. Samples collected from abandoned U-V mines and prospects hosted in Mississippian aged paleokarst in Montana and Wyoming have hydrocarbon residue present and contain anomalous high concentrations of many metals that are found in similar concentrations in the Phosphoria Formation. As, Hg, Mo, Pb, Tl, U, V and Zn, often metals of environmental concern occur in high concentrations in Phosphoria Formation samples and had values ranging from 30-1295 ppm As, 0.179-12.8 ppm Hg, 2-791 ppm Mo, <2-146 ppm Pb, 10-490 ppm Tl, 907-86,800 ppm U, 1240-18,900 ppm V, and 7-2230 ppm Zn, in mineralized samples from this study. The REE plus Y composition of Madison Limestone-and limestone breccia hosted-bitumen reflect similar patterns to both mineralized samples from this study and to U.S. Geological Survey rock samples from studies of the Phosphoria Formation. Geochemical, mineralogical and field data were used to investigate past theories for mineralization of these deposits to determine if U present in home wells and Hg content of fish from rivers on the proximal Crow Indian Reservation may have been derived from these deposits or related to their mode of mineralization.

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