 | | Journal (article/letter/editorial) | | Rodney C. Ewing a,b,c,*, Lu-Min Wang b,c a b Department of Geological Sciences, The University of Michigan...Michigan Ann Arbor, MI 48109-1005, USA Department of Nuclear Engineering and Radiological Sciences, The...University of Michigan Ann Arbor, MI 48109-2104, USA c Department of Materials Science and Engineering, The University...samples from the natural fission reactors at Oklo, Gabon. Multiple cycles of radiation-induced decomposition...U(VI)-phase; ion irradiation; uraninite; nanocrystals; Oklo 1. Introduction Spent nuclear fuel consists primarily |  | | Report (volume) | | Editors: Peter C. Burns' & Robert Finch 2 1 Department of Civil Engineering and Geological Sciences...2)04(0H)6(H 20)9 (purple to dark yellow), and uranophane, Ca(U0 2) 2(Si0 30H) 2 (H 20h (pleochroic mottled...apparent epitaxial relationship, as do the overlying uranophane and ianthinite/schoepite, suggesting the potential...pictured here, uraninite ⇒ ianthinite ± schoepite ⇒ uranophane, is observed spatially at micrometer to kilometer...schoepite), eventually forming uranyl silicates (uranophane) over time. Transmit1ed light, crossed polars; |  | | Journal (article/letter/editorial) | | Deditius ⁎, Satoshi Utsunomiya 1, Rodney C. Ewing Department of Geological Sciences, University of Michigan...Deditius). 1 Current address. Kyushu University, Department of Chemistry, Ropponmatsu, 4-2-1, Chuou-ku, Fukuoka-shi...roscoelite saleeite soddyite swamboite torbernite uranophane uranopilite vanuralite Ba[(UO2)(PO4)]2(H2O)6...composition of coffinite is from the U-deposits in Oklo, Gabon (e.g., Janeczek, 1999; Jensen and Ewing, 2001;...been reported in the natural reactor in Bangombé, Gabon, suggesting that coffinite may play an important |  | | Journal (article/letter/editorial) | | Branch Road NW, Washington, D.C. 20015, U.S.A. Department of Geological Sciences, University of Michigan...Avenue, Ann Arbor, Michigan 48109-1005, U.S.A. 3 Department of Earth and Planetary Sciences, Johns Hopkins...(Australia and Canada) and the unique Oklo natural nuclear reactors in Gabon. The onset of hydrothermal transport...abundances [e.g., ~3 metric tons (mT) of Pu at the Oklo natural reactors, 5 mT of Pu from atmospheric testing...(Australia and Canada) and the unique Oklo natural nuclear reactors in Gabon. During this phase, most uranyl |  | | Report (chapter) | | K2[(UO2)604(OH)6 ] 98H20), U ~ silicates (e.g., uranophane, Ca(UO2)2(SiO3)2 Downloaded from http://sp...Ca(UO2)2(Si205)3- 5H20 Weeksite K2(UO2)2(Si2Os)3.4H20 Uranophane group (U: Si = 1 :1) Boltwoodite K(H30)[(UO2)(SiO4)]"...Swamboite (U02)0.33 [(UO2)(SiO4)] 2" 6H20 [3-uranophane Ca(UO2)2(SiO3)2(OH)2.5H20 Uranyl carbonates Andersonite...noted that studtite can easily be mistaken for uranophane and can only be distinguished through XRD analysis...phases ~-uranophane and boltwoodite, K(H30)[(UOz)(SiO4)].0.5H2_ O; however, Np-bearing uranophane has been |  | | Book | | ........................................... 36 Gabon ..................................................uranium if higher prices justify reprocessing the mine tailings to recover some of the uranium that was...wastewater during environmental reclamation at a mine that has ceased production. The following statistical...was about 270 tU. In Argentina the Sierra Pintada mine had been in standby status since 1999 and was expected...recovered from mine rehabilitation activities; small amounts were likewise recovered during mine remediation |  | | Journal (article/letter/editorial) | | PRIMARY URANINITE Ryan SHARPE§ and Mostafa FAYEK Department of Geological Sciences, 240 Wallace Building...site of the first discovery of the mineral in the province (Paul 1984). The pegmatite was characterized by...and Canada) and the natural nuclear reactors in Gabon. The final phase was made possible by the rise of...2009, 2010, Cuney & Kyser 2009). The Superior Province of the Canadian Shield is one of the oldest cratons...Archean craton on Earth. The western Superior Province is divided into a series of east–west-trending |  | | Journal (article/letter/editorial) | | os de Caldas, Cigar Lake, Maqarin, El Berrocal, Oklo and Palmottu. To make this comparison meaningful...primary uranium mineralisations (Enresa, 1996); Oklo (Gabon), a fossil natural nuclear reactor systems located...carried out to date. For example, the studies at Oklo and Palmottu were completed only during 1999. Consequently...BPM exercises, from the Pocß os de Caldas to the Oklo and Palmottu projects, has not varied significantly...(Spain), CSIC (Spain) and MBT/QuantiSci (Spain). Oklo: CEA (France), Ciemat (Spain), CNRS (France), CSIC |  | | Journal (article/letter/editorial) | | Deditius, Satoshi Utsunomiya, Rodney C. Ewing * Department of Geological Sciences, University of Michigan...been described in sedimentary U-deposits at Oklo, Gabon, and unconformable U-deposits within Athabasca...of As in uraninite from the widely cited Nopal I mine (Janeczek et al., 1996; Finch and Murakami, 1999)...Rocky Mountain and Intermountain Basin Uranium Province, USA (Dahlkamp, 1993; Finch, 1996) (Fig. 1). The...different ages for the rock units at the Lookout Mine: 94, 99, and 203 Ma using the U–Pb method, and suggested |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PRINCIPAL URANIUM DEPOSITS OF THE WORLD ...Angola, Peoples Republic of........................ Gabon, Republic of................................. Central...torbernite, meta-torbernite, autunite, meta-autunite , uranophane, and schroeckingerite , occur in weathered and...sandstone deposits. Autunite, torbernite, and uranophane are especially widespread uranyl species found...Saskatchewan, Canada; the Shinkolobwe, Katanga Province, Zafre; and the medium-sized deposits at Joachymov |  | | Journal (article/letter/editorial) | | spent nuclear fuel, actinides, fission products, Oklo concentration in the fuel increases with time, and...and observations from natural systems, such as the Oklo natural reactors, have been used to assess the long-term...Barcelona, Spain E-mail: jbruno@enviros.biz 3 Department of Geological Sciences, University of Michigan...the Office of Civilian Radioactive Waste in the Department of Energy has created a Source Term Research...conditions or U(VI) phases, like becquerelite or uranophane under oxidizing conditions (see Burns and Klingensmith |  | | Book | | ........................................... 75 Gabon ..................................................vvastewater during environmental reclamation at a mine that has ceased production. The following statistical...Saskatchewan, is the world's largest high-grade uraniu1n mine. The ore from that ,nine is crushed and treated...to start production at the Talvivaara Ni-Zn-Cu-Co mine, ,vhere bio-heap leaching is used to extract metals...Production is expected to grow when the Four Mile ISL mine comes on strea1n, and planned expansion of Olympic |  | | Journal (article/letter/editorial) | | Mina,b,*, Changquan Fanga, Mostafa Fayekc a Department of Earth Sciences, State Key Laboratory of Mineral...Nanjing 210093, People’s Republic of China c Department of Earth and Planetary Sciences, University of...China 1. Introduction * Corresponding author. Department of Earth Sciences, State Key Laboratory of Mineral...deposits. The district is located in the Jiangxi Province, SE China, and is one of the most economically...minerals. The latter include autunite, uranophane, barium–uranophane, torbernite and uranocircite. The coffinite |  | | Journal (article/letter/editorial) | | packages containing special spent fuel from the Department of Energy and high-level nuclear waste glass...the only known natural reactors went critical in Oklo, West Africa (Gauthier-Lafaye et al., 1996) 2 Ga...Other factors, such as lack of neutron absorber at Oklo but not at Cigar Lake (presence of B), also contributed...Mountain site is the confinement sustained by the Oklo nuclear reactors. The criticality events that lasted...negative feedback mechanisms. In that sense, the Oklo reactors are more an analog to current commercial |  | | Journal (article/letter/editorial) | | significant primary uranium mineralization. Svornost mine, Jáchymov; photo P. Škácha. c – “Gummite” – residual...replaced by orange masuyite. Dump of the Rovnost mine, Jáchymov. The width of the sample is 4 cm. Photo...during the post-mining processes, known as the Acid-Mine Drainage (AMD) (e.g., Brugger et al. 2003) (Fig...soddyite (short prismatic orange) from the Shinkolobwe mine, Congo. FOV 2.3 mm. b – Long-prismatic crystals...carbonate mineral wyartite, containing U5+. Shinkolobwe mine, Congo. FOV 2 mm. e – Typical efflorescence (uranyl |  | | Report (chapter) | | Jachimov (Czech Republic), Cigar Lake (Canada), and Oklo (Gabon). The uraninite samples were thoroughly characterized...experiments on dissolution of uraninite samples from Oklo and Cigar Lake. Solid lines correspond to the calculated...(Ca(UO2)604(OH)6.8H20), soddyite ((UOz)zSiO4.2H20), uranophane (Ca(UO2)2 [SiO3(OH)]z-5H20) and other Ca-U(VI)-silicates...2+ | r ==~ 3 Ca[(UOz)(SiO3OH)] 2 -5 95H20(uranophane) 4- 4 H + + H20 (25) Application of the collected...Fe(III)-oxyhydroxide Calcite Uraninite Schoepite Uranophane log Rate (mole/mZ/s) - 13.39 13.28 13.07 12 |  | | Journal (article/letter/editorial) | | Uranium Deposits H. A. Qidwai and M. L. Jensen Department of Geology and Geophysics, University of Utah...occurrences have al- ready been cited; viz., in Gabon, India, Pakistan, and Egypt (Udas and Mahadevan...such as carnotite, tyuyamunite, autunite, and uranophane are least soluble at p H values between 5 to...du G i s e m e n t D ' U r a n i u m D~Oklo. Le Ph6nom~ne D~Oklo, I . A . E . A . , 53-65 (1975) Dapples...Mineralization in the Rum Jungle-Alligator Rivers Province, Northern Territory, Australia. Formation of Uranium |  | | Report (issue) | | deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...activities include drilling and coring to complete final mine plans and establish final processing flowsheets...case of an underground mine or overburden stripping in the case of an open pit mine, mill construction,...direction and dips south at 15–30º. In the Main Mine Series the ore zone is up to 35m thick. Jabiluka...open to the south and east at depth. In the Main Mine Series the ore zones are up to 135m thick. The metasedimentary |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Geology and genesis of major world hardrock....................................44 Grenville Province, Quebeck and Ontario............................orebody.....................39 20. Grenville Province of the Canadian Shield......................46...Saskatchewan.............53 22. Geology of the Rossing mine area...............................55 iii Illustrations...cross section of Verna and Fay orebodies, Eldorado mine................................................ |  | | Journal (issue) | | System, released by the U.S. Bureau of Mines, Department of the Interior in September 1995. It comes as...collect. There are limitations to the search function. Mine names, for example, are literal; "Big Indian" returned...good eye, you can find your backyard or recognize a mine dump. Which brings up a good point, and a potential...Terraserver. You can use it to help locate those mine dumps you want to visit, or consider the possibilities...Cilen from Carretona Rodrigo district, Salamanca Province, Spain labeled as bassetite. Two extremely rare |  | | Journal (issue) | | Jianghshan, Guangdong Province. I have seen others listed as coming from Hebei Province. Regardless of where...4 Fig. 1. Apophyllite, Jianghshan, Guangdong Province, China, photo by Dan Weinrich. neat piece. To...the old classic locality, Morgabal, in Aveyron Department, France. Also, he had small trays holding small...stibnites from a new Nevada locality, the Murray Mine, not the old Manhattan, but he had only three specimens...clear calcites from a small pocket in the Meikle Mine, the new locality for the superb yellow barites |  | Ozha, Manoj Kumar, Pal, Dipak Chandra, Mishra, Biswajit, Desapati, T., Shaji, T.S. (2017) Geochemistry and chemical dating of uraninite in the Samarkiya area, central Rajasthan, northwestern India – Implication for geochemical and temporal evolution of uranium mineralization. Ore Geology Reviews, 88. 23-42 doi:10.1016/j.oregeorev.2017.04.010 | Journal (article/letter/editorial) | | Biswajit Mishra1,∗∗ , T. Desapati3, T.S. Shaji4 1 Department of Geology and Geophysics, Indian Institute of...of Technology, Kharagpur 721302, India 2 Department of Geological Sciences, Jadavpur University, Kolkata...uranium minerals such as uraninite, brannerite, uranophane, carnotite, kasolite and masuyite from the PQ-II...contain radioactive uraninite, coffinite and uranophane (Figs. 4b−d and 6g−i). Non-radioactive ore minerals...the basement, commonly coffinite and at places uranophane are associated with uraninite in the supracrustal |  | | Report (issue) | | CHAPTER 1: INTRODUCTION Kurt Kyser Department of Geological Sciences and Geological Engineering, Queen’s...engineered. Once an ore deposit is discovered, a mine is developed and U extracted by a variety of mining...Bay Basin in Canada and the Franceville Basin in Gabon, but at the boundary between sandstone and grey...the oldest deposits from the Franceville Basin in Gabon. Some of these latter deposits preserve the effects...gold mining. In Namibia, the large Rössing open cut mine has been in operation since 1976, and currently |  | | Book | | (individual deposit) and regional scale (uranium province). Their ideas, observations, and data have directly...Granite-Related Vein Uranium Deposits: Schwartzwalder Mine, Front Range, USA ................................Uranium Deposits: Shinkolobwe, Katanga Copper Province, Zaire .........................................Deposits in Proterozoic Sandstones: Franceville Basin, Gabon ......................... 224 232 237 246 250 250...when analyzing pitchblende from the George Wagsfort mine at Johanngeorgenstadt, Sachsisches Erzgebirge (Saxonian |  | De Vivo, B., Ippolito, F., Capaldi, G., Simpson, P. R. - Eds. (1984) Uranium geochemistry, mineralogy, geology, exploration and resources. Springer Netherlands. doi:10.1007/978-94-009-6060-2 | Book | | Role of high heat production granites in uranium province formation 167 P. R. Simpson and Jane A. Plant...300°C: geological implications Samuel B. Romberger Department of Geology, Colorado School of Mines, Golden...T. S . eds (Houston, Texas: Rice University, Department of Geology, 1972),483-516. 7. Dall'Aglio M. and...in Texas and Wyoming. In the Texas Gulf Coast province deposits occur in sandstone formations and group...drape around permeability barriers in a uranium mine, so the colour bands follow the same 28 Medium |
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