Petrogenetic modeling of a potential uranium source rock, Granite Mountains, Wyoming

Stuckless, John S.; Miesch, A.T.

doi:10.3133/pp1225

Cited by 13 publications

(25 citation statements)

References 21 publications

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“…Location of the drill holes is shown on the Fig. 7a the ores (Ludwig, 1978(Ludwig, , 1979 broadly coincides with timing of uranium loss from the granite Nkomo, 1978, 1980;Stuckless and Miesch, 1981). The isotope dates also suggest that mineralisation is older than volcanic rocks in the region (Stuckless and Nkomo, 1978).…”

Section: Discussionmentioning

confidence: 73%

“…In addition, the continued supply of oxygen to the interface led to degradation of the reducing environment and resulted in down-dip migration of the reduction/oxidation interface, remobilising the associated uranium, and enhancing the grade of uranium rolls. a composition of the granites on the Na 2 OzK 2 O vs SiO 2 diagram of Middlemost (1985); b histogram of uranium grades in the granites 5 Composition of the Granite Mountain rocks (assays are from Stuckless et al, 1977;Stuckless and Miesch, 1981) The reducing environment in the host sand is generally the result of carbonaceous material or leaked reductant gases within the formation (O.Paulson, written communication). Pyrite and marcasite are inherently associated with both and contribute to the reducing environment.…”

Section: Lost Creekmentioning

confidence: 99%

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Sandstone hosted uranium deposits of the Great Divide Basin, Wyoming, USA

Abzalov

Paulson

2012

Applied Earth Science

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The Great Divide basin is located in the southern part of the state of Wyoming in USA. Wyoming is the second largest uranium province in that country after the Colorado Plateau. The Great Divide basin represents an intermontane depression of Tertiary age surrounded by major structural uplifts composed of Precambrian rocks including uraniferous Precambrian granite. The main uranium resources of the Great Divide basin are hosted in the weakly lithified sandstone of the Eocene Battle Spring Formation which terminates the sedimentary sequence at the basin. Uranium occurs in the form of rolls and the tabular mineralisation is usually associated with carbonaceous debris in the host sediments. Because of close spatial relationships between uranium and detrital carbonaceous debris the uranium mineralisation of the Great Divide basin is referred to as detrital carbon-uranium roll-type which is a special class of Phanerozoic sandstone hosted uranium deposits. The deposits of the Great Divide basin contain from 2 to 15 kt of U 3 O 8 each, which occurs as uranium rolls and tabular mineralisation, some of which is fault controlled. Their formation is related to multi-episodic uplifts of the Precambrian basement which is exposed along the margins of the basin.

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Section: Discussionmentioning

confidence: 73%

Section: Lost Creekmentioning

confidence: 99%

Sandstone hosted uranium deposits of the Great Divide Basin, Wyoming, USA

Abzalov

Paulson

2012

Applied Earth Science

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“…The gneisses in the southern Bighorn Mountains are intruded locally by garnetbearing granite. These are undated but may be part of a suite of volumetrically minor but widespread garnet granites that occur within the 2.62 Ga Granite Mountains batholith (Stuckless and Miesch 1981).…”

Section: Late Intrusionsmentioning

confidence: 99%

“…Younger, voluminous, late Archean calc-alkalic batholiths composed of granodiorites and granites occur as elongate belts along the southern and western margins of the Wyoming Province. Principal among these are the 2.67 Ga Bridger batholith, which is exposed in the central and northern Wind River Range, and the 2.63 Ga Louis Lake batholith and 2.62 Ga Granite Mountains batholith, which are located in the central and southern Wind River Range and the Granite Mountains, respectively (Stuckless and Miesch 1981;Frost et al 1998). These batholiths are calc-alkalic to alkali-calcic, metaluminous to weakly peraluminous, and magnesian to ferroan, and their compositional ranges are comparable to those of modern subduction-related batholiths.…”

Section: Origin Of the Potassic Gg Suitementioning

confidence: 99%

The tonalite–trondhjemite–granodiorite (TTG) to granodiorite–granite (GG) transition in the late Archean plutonic rocks of the central Wyoming Province

Frost¹,

Frost²,

Kirkwood³

et al. 2006

Can. J. Earth Sci.

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The 2.95-2.82 Ga quartzofeldspathic gneisses and granitoids in the Bighorn, western Owl Creek, and northeastern Wind River uplifts in the central Wyoming Province include low-K tonalite-trondhjemite-granodiorite (TTG) and high-K granodiorite-granite (GG) rocks. Both types of granitoids were intruded contemporaneously, although TTGs are more abundant in the older gneisses. The TTG suite consists of calcic to marginally calc-alkalic rocks that straddle the boundaries between metaluminous and peraluminous and between ferroan and magnesian compositions. Rare-earth element (REE) patterns of these rocks may be highly fractionated with low heavy rare-earth element (HREE) contents and modest to absent Eu anomalies but may also be less strongly HREE depleted. These rocks do not represent firstgeneration continental crust: most have unradiogenic Nd and radiogenic 207 Pb/ 204 Pb isotopic compositions that require the incorporation of isotopically evolved sources. The GG suite has compositions that are transitional between Archean TTG and modern, continental margin calc-alkalic rocks. The GG suite is characterized by higher alkali contents relative to CaO than the TTG suite and higher K/Na ratios but exhibits a similar range in REE patterns. The Nd, Sr, and Pb isotopic compositions of the GG suite are slightly less variable but lie within the range of those of the TTG suite. We interpret them as having a source similar to that of the TTG, perhaps forming by partial melting of preexisting TTG. The shift from TTG-dominated to GG-dominated continental crust was a gradual transition that took place over several hundred million years. Clearly subduction-related calc-alkalic magmatism is not recognized in the Wyoming Province prior to 2.67 Ga.Résumé : Les gneiss et les granitoïdes quartzo-feldspathiques, 2,95 -2,82 Ga, dans les soulèvements de Bighorn, de l'ouest d'Owl Creek et du nord-est de Wind River dans le centre de la Province de Wyoming comprennent des roches tonalite-trondhjémite-granodiorite (TTG) à faible teneur en K et des roches granodiorite-granite (GG) à teneur élevée en K. Les deux types de granitoïdes ont été pénétrés en même temps, bien que les roches TTG soient plus abondantes dans les gneiss plus anciens. La suite TTG comprend des roches calciques à légèrement calco-alcalines qui chevauchent les limites entre les compositions métalumineuses et hyperalumineuses et les compositions ferrifères et magnésiennes. Les patrons des éléments des terres rares de ces roches peuvent être hautement fractionnés avec une faible teneur en éléments des terres rares lourdes et des anomalies Eu modestes à absentes, mais les roches peuvent aussi être moins appauvries en éléments des terres rares lourdes. Ces roches ne représentent pas une croûte continentale de première génération : la plupart ont des compositions isotopiques Nd non radiogéniques et des compositions 207 Pb/ 204 Pb radiogéniques qui demandent l'incorporation de sources isotopiquement évoluées. La suite de roches GG possède des compositions qui représentent une transi...

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“…--Ternary diagrams for the relative proportions of potassium, rubidium and strontium in granitic rocks from the Wind River Range (this report), the Owl Creek Mountains (Stuckless and others, unpub. data) the Granite Mountains (Stuckless and Miesch, 1981), and the Sierra Nevada Mountains (Dodge and others, 1982) …”

Section: Resultsmentioning

confidence: 99%

Petrogenetic modeling of a potential uranium source rock, Granite Mountains, Wyoming

Cited by 13 publications

References 21 publications

Sandstone hosted uranium deposits of the Great Divide Basin, Wyoming, USA

Sandstone hosted uranium deposits of the Great Divide Basin, Wyoming, USA

The tonalite–trondhjemite–granodiorite (TTG) to granodiorite–granite (GG) transition in the late Archean plutonic rocks of the central Wyoming Province

Assessment of uranium favorability for the crystalline rocks of the Wind River Range, Wyoming

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