... for partial melt material to be derived from uraniferous basement lithologies. The concentration of magmatic uranium was promoted where leucogranite melt material interacted with carbonates and sulfide-bearing Damaran metasedimentary units. In the Rössing area these horizons occur at the Khan-Rössing...

... at moderate to high temperature hydrothermal fluid. In view of uraniferous nature and their dimension, migmatites of the area warrant detailed exploration to establish migmatite hosted U-mineralisation. * Email: [email protected] 21 05 2018 14 01 2019 01 07 2019 Copyright ©...

... uraniferous area ( Cai et al., 2007 ; Fan et al., 2007 ; Li and Li, 2011 ; Li et al., 2006 ; Liu et al., 2007b ; Sun et al., 2007 ; Tuo et al., 2010 ; Xue et al., 2010 , 2011 ; Yang et al., 2009 ; Zhang et al., 2017 ). Liu et al. (2008) suggested that coal and hydrocarbon generally exhibit a close...

... erosion of sedimentary pyrites. Three generations of pyrite are recognised, with primary gold hosted as inclusions within compact, rounded detrital pyrite and gersdorffite grains. No uraninite grains are observed in the MCR, with allogenic uraniferous leucoxene and authigenic brannerite forming the major...

...P. Alexandre; T. K. Kyser Abstract The sediment-hosted unconformity-type Southwest Athabasca uranium mineralization in northern Saskatchewan, Canada, contains uraniferous bitumen, as observed elsewhere in the Athabasca basin. Uraninite is present either as micron-sized grains dispersed in bitumen...

... GEOLOGICAL SOCIETY OF [NOlA Vol. 51, June 1998, pp. 817-825 The Lead Isotope Geochemistry and the Uranium-Lead Apparent Ages of the Sandstone..type Uraniferous Ore of Domiasiat, Meghalaya, India RADHA R. DASl, K.K. DWIVEDy 1, T.R. MAHALINGAM2 and C.K. MATHEWS2 IAtomic Minerals Division, Department of Atomic...

.... 495-502 Carbon, Oxygen and Uranium ][sotopic Study of Uraniferous Dolostone from Cuddapah Basin, Southern ][ndia : ][mplications to Depositional Environment and Uranium Alteration S.K. BHATTACHARYA', M.M. SARIN', MrNATI ROY 2A AND R. DHANA RAJU2B JPhysical Research Laboratory, Ahmedabad 380 009...

... with Uraniferous Organic Matter at Domiasiat, Meghalaya and its Genetic Implications T.S_ SUNILKUMAR, D. NARASIMHAN AND N. KRrSHNA RAO Ore Dressing Section. Bhabha Atomic Research Centre, Begumpet. Hyderabad - 500 016 Abstract: The occurrence of authigenic apatite with uraninite, pyrite, sphalerite and galena...

... of India Organic Matter Uranium Ore Sandstone Domiasiat Meghalaya JOURNALGEOLOGICALSOCIETYOF INDIA Vo1.45, April, 1995, pp. 407-425 Uraniferous organic matter in the sandstone-type uranium ore from Domiasiat, Meghalaya, India N. KRISHNARAO,T.S.~UNLKUMARAND D.NARASIMHAN Ore Dressing Section...

...PAUL A. EAKIN Abstract Stable carbon isotopic ratios of a suite of uraniferous hydrocarbons (Lower Jurassic) from the northeast Wales ore field and related deposits have been determined. The isotopic compositions (–11.41 to –29.36% PDB) become increasingly heavy with increasing uranium content...

...A. R. Miller; G. L. Cumming; D. Krstic Abstract The Thelon Formation, uppermost unit of the Dubawnt Group, overlies a regionally extensive paleoweathered zone developed on a wide range of lithochronological units including formations in the lower Dubawnt Group. Authigenic uraniferous phosphate...

...G. S. Clark; W. Weber Abstract Late Archean, post-kinematic, uraniferous granite and alaskite occur as several discrete large and small bodies in the 250 km long Molson Lake – Red Sucker Lake batholithic belt, in the western Gods Lake subprovince. Sampled over this length, this unit gave a Rb–Sr...

... Brook, Humber Falls) et de Howley. Des dépôts de cône de déjéction à gros grain et des sédiments fluviatiles trouvés dans des carottes qui ont penétré les formations de North Brook, Humber Falls et de Howley, et des gros blocs de grès uranifères trouvés dans des moraines glaciaires Pléistocènes au...

...Brigitte Aniel; Jacques Leroy Abstract The uraniferous mineralizations of the Nopal I deposit (Sierra Pena Blanca, Chihuahua, Mexico) are related to a breccia pipe in a tertiary vitroclastic tuff (Nopal Formation). Detailed mineralogical and fluid inclusion studies led to the discovery of a primary...

...Joseph A. Curiale; Salman Bloch; Janina Rafalska-Bloch; William E. Harrison ABSTRACT Geologic field relations and geochemical analyses imply a petroleum-related origin for the organic matter of uraniferous nodules in the Permian Hennessey Group red beds in Kiowa County, Oklahoma. The local presence...

... a decrease in both pH and ratio of bicarbonate to phosphate, which favors the replacement. Uranium is incorporated in the apatite as the apatite forms or soon after. No special source, other than weathering of volcanic ash, is required for the phosphorus or the uranium. The uraniferous phosphatic beds do...

...Joseph A. Curiale; Salman Bloch; Janina Rafelska-Bloch; William E. Harrison Geologic field relations may be used to infer a coal- or petroleum-related origin for uraniferous organic nodules of the Hennessey Group (Permian), in Kiowa County, Oklahoma. The local presence of crude oil in the shallow...

..., in which it ranges up to 10% by weight. Stable carbon isotope ratios of the uraniferous nodules show a consistent decrease from -31.2 ppt in the center of the nodule to -31.6 ppt at the outer edge (all values relative to PDB). This isotopic lightening at the edge of the nodule is also reflected...