Geology and uranium deposits, Shirley Basin area, Wyoming

Harshman, E.N.

doi:10.3133/pp745

Cited by 32 publications

(9 citation statements)

References 21 publications

(28 reference statements)

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“…). In contrast, a well‐developed roll in roll‐type deposits forms a crescentic of C‐shaped orebody concave toward the altered tongue (Shawe & Granger ; Warren ; Harshman ; Reynolds & Goldhaber ). Thus, the two disparate geometries reflect two contrasting mechanisms of uranium precipitation.…”

Section: Discussionmentioning

confidence: 99%

“…The zones enriched in U, Mo, and V are coextensive spatially and together border the grayish‐green zone with low concentrations of U, Mo, and V but high concentrations of Se. The distributions of U, Mo, V, and Se are typical of roll‐type deposits (Harshman ; Reynolds & Goldhaber ).…”

Section: Geological Settingmentioning

confidence: 99%

“…Geometrically, these deposits are typically subhorizontal, very extensive horizontally, and relatively thin vertically (Granger 1968;Turner-Peterson & Fishman 1986;Northrop et al 1990). In contrast, a welldeveloped roll in roll-type deposits forms a crescentic of C-shaped orebody concave toward the altered tongue (Shawe & Granger 1965;Warren 1971;Harshman 1972;Reynolds & Goldhaber 1983). Thus, the two disparate geometries reflect two contrasting mechanisms of uranium precipitation.…”

Section: Comparison Of the Genetic Model With Previous Modelsmentioning

confidence: 99%

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A comprehensive review of hydrocarbons and genetic model of the sandstone‐hosted Dongsheng uranium deposit, Ordos Basin, China

et al. 2016

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The Dongsheng uranium deposit, the largest in situ leach uranium mine in the Ordos Basin, geometrically forms a roll‐front type deposit that is hosted in the Middle Jurassic Zhiluo Formation. The genesis of the mineralization, however, has long been a topic of great debate. Regional faults, epigenetic alterations in surface outcrops, natural oil seeps, and experimental findings support a reducing microenvironment during ore genesis. The bulk of the mineralization is coffinite. Based on thin‐section petrography, some of the coffinite is intimately intergrown with authigenic pyrite (ore‐stage pyrite) and is commonly juxtaposed with some late diagenetic sparry calcite (ore‐stage calcite) in primary pores, suggesting simultaneous precipitation. Measured homogenization temperatures of greater than 100°C from fluid inclusions indicate circulation of low‐temperature hydrothermal fluids in the ore zone. The carbon isotopic compositions of late calcite cement (δ13CVPDB = −31.0 to −1.4‰) suggest that they were partly derived from sedimentary organic carbon, possibly from deep‐seated petroleum fluids emanating from nearby faults. Hydrogen and oxygen isotope data from kaolinite cement (δD = −133 to −116‰ and δ18OSMOW = 12.6–13.8‰) indicate that the mineralizing fluids differed from magmatic and metamorphic fluids and were more depleted in D (2H) than modern regional meteoric waters. Such a strongly negative hydrogen isotopic signature suggests that there has been selective modification of δD by CH4±H2S±H2 fluids. Ore‐stage pyrite lies within a very wide range of δ34S (−39.2 to 26.9‰), suggesting that the pyrite has a complex origin and that bacterially mediated sulfate reduction cannot be precluded. Hydrocarbon migration and its role in uranium reduction and precipitation have here been unequivocally defined. Thus, a unifying model for uranium mineralization can be established: Early coupled bacterial uranium mineralization and hydrocarbon oxidation were followed by later recrystallization of ore phases in association with low‐temperature hydrothermal solutions under hydrocarbon‐induced reducing conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Comparison Of the Genetic Model With Previous Modelsmentioning

confidence: 99%

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A comprehensive review of hydrocarbons and genetic model of the sandstone‐hosted Dongsheng uranium deposit, Ordos Basin, China

et al. 2016

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“…Large-scale prospecting and exploitation of sandstone-type uranium deposits were developed in America and in the former Soviet Union beginning in 1952 (Brown, 1956;Finch, 1967;Fischer, 1960;Galloway, 1979;Garrels and Christ, 1959;Harshman, 1972;Langmuir, 1978), when the first sandstone-type uranium deposit in the world was discovered in Uchquduq, Uzbekistan. After 1980, because of the depressed international price of uranium, the prospecting and exploitation of sandstone-type uranium deposits was greatly reduced.…”

Section: Introductionmentioning

confidence: 98%

Sedimentological setting of sandstone-type uranium deposits in coal measures on the southwest margin of the Turpan-Hami Basin, China

Jiao

Mason

et al. 2009

Journal of Asian Earth Sciences

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“…In some deposits, however, solutions clearly heated above normal groundwater temperatures were involved in ore formation. Also, the volumes of basement rock postulated to have been leached and the volume of groundwater needed to form deposits may be prohibitively large (Fisher, 1974 The uranium deposits of the Wyoming Basins are reviewed by Harshman (1972), Rackley (1972), Melin (1964), and Sharp and Gibbons (1964) Each cell is coded according to its uranium production as follows:…”

Section: No Techniquesmentioning

confidence: 99%