rare earth elements in Wyoming

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figure 23. Uraniferous phosphatic zone 2a within the Wilkins Peak Member in the South Firehole Canyon area. A, stratigraphic position of UPZ 2a. B, sample of green, blocky, noncalcareous mudstone that comprises UPZ 2a (20121129JC-C). The next 65 to 70 m (213 to 230 ft) above bed 9 consist of interbedded ridge forming gray to tan siltstone and dolostone and slope forming green shale and mudstone with no anomalous radioactivity. About 88 to 90 m (289 to 295 ft) above the base of the Wilkins Peak Member, higher than the uppermost unit in Love’s (1964) measured section (table 19), is a succession of ridge forming interbedded green calcareous mudstone and limestone, and green to gray, laminated to cross-laminated 60 siltstone overlain by a medium- to coarse-grained, cross-bedded sandstone. UPZ 4 is associated with a radioactivity anomaly up to 5.9 times background (330 cpm) and occurs about 1.5 m (5 ft) above the base of this interbedded succession within a green, well-indurated, bulbous, thin-bedded calcareous mudstone (Sample 20121129JC-D). REE enrichment is only found in UPZ 2a (Sample 20121129JC- C) and is restricted to the HREE and yttrium. This is similar to Love’s (1964) results, in which he reported high concentrations of yttrium and neodymium. Notably, the enrichment of neodymium in UPZ 2a reported by Love (1964) is not present in sample 20121129JC-C. This indicates that relative enrichment between the LREE and HREE may vary laterally or vertically across UPZ 2a in the Fire Hole Canyon area (table 20). Phosphorite beds in Western Wyoming Phosphorite beds within the Phosphoria Formation are possible sources of REE and other metals (King and Harris, 2002) and some sites have been confirmed to host metal deposits (Gulbrandsen, table 20. Concentration of the REE, P 2 O 5 , uranium, and thorium in the Wilkins Peak Member of the Green River Formation at South Firehole Canyon. Bold values indicate concentrations greater than five times crustal abundance. Element La (ppm) Ce (ppm) Pr (ppm) South Firehole Canyon Nd (ppm) Sm (ppm) Eu (ppm) Gd (ppm) Tb (ppm) Dy (ppm) Ho (ppm) 20121129JC-A 41 83.4 10 38.9 7.93 1.6 7.18 1.18 6.87 1.33 20121129JC-B 42.5 80.6 9.29 33.1 5.8 1.14 4.73 0.8 5.05 1.12 20121129JC-C 55.4 131.5 18.65 87 25.4 6.44 32.5 6.67 44.1 9.75 20121129JC-D 24 49 6.01 22.8 4.35 0.91 4.46 0.97 8.28 2.39 Element Er (ppm) Tm (ppm) Yb (ppm) Lu (ppm) Sc (ppm) Y (ppm) Cumulative REE (ppm) P O (%) 2 5 U (ppm) Th (ppm) 20121129JC-A 3.63 0.52 2.9 0.42 9 41.3 257.2 0.21 13.9 44.4 20121129JC-B 3.44 0.54 3.08 0.44 8 36.4 236.0 0.32 15.05 48.7 20121129JC-C 29.7 4.67 28.2 4.25 13 300 797.2 8.72 90.4 373 20121129JC-D 8.49 1.42 7.71 1.01 7 79.5 228.3 0.55 31.7 94
1977; Love, 1984). REE concentrations are typically correlated with phosphorus content, due to an association with apatite. Despite its promise as a host of REE, the Phosphoria Formation has been the subject of few REE analyses (King and Harris, 2002). Hoback, SW¼NE¼ sec. 32, T. 39 N., R. 116 W., Southwestern Teton County The Phosphoria Formation crops out along US 89, near the historic town site of Hoback, in extensively folded and faulted terrain, and was the target of a phosphate exploration trench (Albee, 1968). The Phosphoria overlies the Mississippian and Pennsylvanian Wells Formation and is overlain by the Triassic Dinwoody Formation. The northeastern margin of this outcrop is cut by a high-angle fault that places the Phosphoria Formation in fault contact with the Wells Formation (Albee, 1968). The Astoria mineral hot spring is located 340 m (1,100 ft) east-southeast of this outcrop (Breckenridge and Hinckley, 1978), and indicates that the overall area may have experienced hydrothermal activity in the past. The Phosphoria Formation in this area (fig. 24) includes the Meade Peak Phosphatic Shale Member and an overlying, unnamed tan mudstone interbedded with chert-bearing limey mudstone (Sample 20121003JC-A). The Meade Peak Member is composed of black, moderately- to well-indurated, massive mudstone (Sample 20121003JC-B), interbedded with black, fissile, poorly indurated shale (Sample 20121003JC-C). The Meade Peak Member is about 15 m (50 ft) thick at this locality, and the overall thickness of the Phosphoria Formation is about 55 m (180 ft). Bedding within the Phosphoria strikes 288˚ and dips 21˚ NW. The upper black shale of the Meade Peak Member is the most phosphatic unit sampled at this location, with 10.4 percent P 2 O 5 . Significant REE-enrichment is only observed within the black phosphatic shale at this location; lanthanum and yttrium are the only REE enriched greater than five times crustal abundances (table 21). The black shale is also enriched in various metals, most notably chromium, nickel, cadmium, and molybdenum. 61 figure 24. Phosphoria Formation outcrop near Hoback. A, interbedded black mudstone, black phosphatic shale, and tan mudstone of the Meade Peak Member, overlain by interbedded tan limestone and mudstone of the upper Phosphoria Formation. B, bed of REE-rich black phosphatic shale, underlain by black mudstone and overlain by tan mudstone; Sample 20121003JC-C location. Crystal Creek Canyon, NW¼SW¼ sec. 34, T. 42 N., R. 113 W., Southern Teton County Simons and others (1988) reported samples with up to 700 ppm lanthanum, 300 ppm yttrium, and 31.5 percent P 2 O 5 from the Phosphoria Formation in the Crystal Creek Canyon area. The Meade Peak Phosphatic Shale Member of the Phosphoria Formation does not appear to crop out in this area. At this location the Phosphoria consists of gray to tan, extensively fractured limestone and limey mudstone, with nodules of chert and yellow to brown, radiating-bladed carbonate crystals (Sample 20121003JC-F). This unit is not significantly enriched in any REE or other elements of economic interest.
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are earth elements in Wyoming Wayne
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Rare Earth Elements in Wyoming Wyom
Page 6 and 7:
Deacon’s Prayer Group Claims . .
Page 9 and 10:
AbstrAct Rare earth elements (REE)
Page 11 and 12:
Wyo-DOG is a multi-tiered applicati
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neodymium-145 through electron capt
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ability and economic factors, inclu
Page 17 and 18: Gosen, Foley, and Cordier, 2010). T
Page 19 and 20: Extraction of rEE Aside from genera
Page 21 and 22: diorites, and their associated pegm
Page 23 and 24: REE deposit in Wyoming and is curre
Page 25 and 26: 17 figure 1. Locations of samples c
Page 27 and 28: accessory aegirine, apatite, stront
Page 29 and 30: Precambrian occurrences Precambrian
Page 31 and 32: 23 figure 5. Sample locations and g
Page 33 and 34: table 6. Concentration of the REE,
Page 35 and 36: the Tie Siding pegmatites. The alte
Page 37 and 38: coarse-grained granite (QAP: 30% Q,
Page 39 and 40: lbs) for 1957 and 450 kg (1,000 lbs
Page 41 and 42: granite to granodiorite with rapaki
Page 43 and 44: 35 figure 10. Sample locations and
Page 45 and 46: table 10. Concentration of the REE,
Page 47 and 48: tertiary-aged Igneous occurrences L
Page 49 and 50: downstream from older REE mineral c
Page 51 and 52: 43 figure 15. Locations of 1952 USB
Page 53 and 54: samples 20110824WS-C and 20110824WS
Page 55 and 56: Samples of the Flathead were collec
Page 57 and 58: tourmaline, amphibole, spinel, sphe
Page 59 and 60: Mud creek, nW¼nE¼ sec. 19, t. 44
Page 61 and 62: figure 20. Sample locations and geo
Page 63 and 64: interaction between oxidized ground
Page 65 and 66: distinct horizons (plus one unit wi
Page 67: figure 22. Sample locations and lit
Page 71 and 72: figure 26. Dahllite concretions fro
Page 73 and 74: Moonstone Formation Reefs, SW¼SE¼
Page 75 and 76: EfErEncEs Adams, J.W., Arengi, J.T.
Page 77 and 78: logical Survey of Wyoming [Wyoming
Page 79 and 80: Love, J.D., 1964, Uraniferous phosp
Page 81 and 82: Saywell, T., 2011, Molycorp’s Mou
Page 83 and 84: IndEx A Abandoned Mine Lands 2 acmi
Page 85 and 86: f fergusonite 12, 13, 33 Ferris Mou
Page 87 and 88: monazite 1, 11, 12, 13, 14, 15, 18,
Page 89 and 90: strontianite 18, 19 Stump Formation
Page 91: notes
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