 | | Journal (article/letter/editorial) | | recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon LENA Z. EVINS,1,* KELD A....Museum of Natural History, Stockholm, Sweden Department of Geological Sciences, University of Michigan...accepted in revised form July 19, 2004) Abstract—The Oklo and Bangombé natural fossil fission reactors formed...formed ca. 2 Ga ago in the Franceville basin, Gabon. The response of uraninite in the natural reactors...Uraninite and galena from two reactor zones, RZ16 at Oklo and RZB at Bangombé, were studied to clarify the |  | | Report (chapter) | | and arsenates Autunite Ca~(UO2)(PO4)]2- 1IH20 Bassetite Fe +[(UO2)(PO4)] 98H20 Chernikovite (H30)2(UO2)(PO4)2-6H20...fission reactors at Okl61obondo and Bangomb~ (Oklo) in Gabon (Brookins 1990; Hidaka & Holliger 1998; Stille...in the U.S. (Zhao & Ewing 2000). The Oklo natural reactors in Gabon are the best natural analogues for...geochemical data on 99Tc, 237Np, and 239pu. The Oklo region reactors have been studied extensively (Hidaka...1999; Jensen et al. 2002). The Bamgomb~ site in the Oklo region is of particular interest as it is located |  | | 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...Mineral name Chemical formula Ba-(meta)autunite bassetite calciouranoite deliensite francevillite françoisite-(Nd)...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 |  | | 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) | | VÉRONIQUE POINTEAU1,4 and RODNEY C. EWING1 1 2 Department of Geological Sciences, University of Michigan...e-mail: artur.deditius@csiro.au 3 Present address: Department of Chemistry, Kyushu University, Ropponmatsu...(Ca, Sr)-(meta)autunite (MAut) from the Woodrow Mine, Grants uranium region, New Mexico, has been investigated...fluids in the natural fission reactors at Bangombé, Gabon, where a phosphatian coffinite formed (P-coffinite)...françoisite-(Nd) REE(UO2)3O(OH)(PO4)2(H2O)6 and bassetite Fe[(UO2)(PO4)]2(H2O)8 (e.g., Janeczek & Ewing |  | | Journal (article/letter/editorial) | | U-bearing minerals from the Vale de Abrutiga uranium mine area, Central Portugal Marina M. S. Cabral Pinto...uranium phosphates from Vale de Abrutiga uranium mine and Pinto et al. (2004) studied the pollution associated...U-bearing phases from the Vale de Abrutiga uranium mine, which occurs close to the contact with a Variscan...and geological map of the Vale de Abrutiga uranium mine. Modified from ENU (Internal Report). Geochemistry...using a Jeol electron-microprobe JX8600 at the Department of Earth Sciences, University of Bristol, U.K |  | | 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 |  | | Report (volume) | | Editors: Peter C. Burns' & Robert Finch 2 1 Department of Civil Engineering and Geological Sciences...Environmental issues such as coping with uranium mine and mill tailings and other uranium-contaminated...and Geochemistry of Natural Fission Reactors in Gabon Janusz Janeczek 8 393 Geomicrobiology of Uranium...and Geochemistry of Natural Fission Reactors in Gabon Janusz Janeczek INTRODUCTION: NATURAL FISSION REACTORS...largest construction projects in the history of the Department of Energy. Approximately three billion dollars |  | | 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...Carretona Rodrigo district, Salamanca Province, Spain labeled as bassetite. Two extremely rare uranium minerals |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PRINCIPAL URANIUM DEPOSITS OF THE WORLD ...Angola, Peoples Republic of........................ Gabon, Republic of................................. Central...Saskatchewan, Canada; the Shinkolobwe, Katanga Province, Zafre; and the medium-sized deposits at Joachymov...Joachymov, Czechoslovakia, and at Schwartzwalder mine, Colorado, U.S.A.). Uranium deposits have been found...Australi a Sweden Spain France Ni ger Argenti na India Gabon Al geri a Yugoslavia Brazil Central African Republic |  | | Thesis/Dissertation | | jak wskazują badania nad naturalnym reaktorem w Oklo (Isobe i in. 1995). Krzemiany uranylu uważane są...redistribution under oxidation conditions in Oklo natural reactor zone 2, Gabon. Mater. Res. Soc. Symp. Proc. 353...uraninite, meta-autunite, matatorbernite, saléeite, bassetite, phosphuranylite, zeunerite, uranophane and sklodowskite |  | 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 |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | information should be addressed to the Permissions Department, John Wiley & Sons, Inc., 605 Third Avenue, New...the late Horace Winchell of Yale University, Department of Geology and Geophysics, and Brian J. Skinner...British Columbia NF Labrador (part of Newfoundland Province) MB Manitoba NB New Brunswick NF Newfoundland...Spotsylvania Co., and Partridge mine, Orange Co., VA, and at Dahlonega, GA; Homestake mine, Lawrence Co., SD; Silver...Lake Co., Breckenridge(*), Summit Co., Ground Hog mine(*), Gilman Co., Silverton and Telluride, San Juan |  | | Report (volume) | | efforts at Sandia National Laboratory and at the Department of Energy's headquarters resulted in the initiation...basic research portfolio in Geosciences at the Department of Energy. He has been, and continues to be,...cutting-edge geochemistry that have particular focus on Department of Energy-related science, at a time when he...his continuing efforts on this volume. The U.S. Department of Energy generously provided funds to help defray...Ca5(PO4)3(F,OH,Cl) John M. Hughes and John Rakovan Department of Geology Miami University Oxford, Ohio 45056 |  | | Book | | Argonne National Laboratory (retired) and U.S. Department of Energy, Washington DC, USA Boris F. Myasoedov...satellites in 1961 (Lange and Mastal, 1994; U.S. Department of Energy, 1987) and continuing to the three...(1996) J. Radioanal. Nucl. Chem., 205, 75–83. U.S. Department of Energy (1987) Atomic Power in Space: a History...Nd[(UO2)3(PO4)2 O(OH)](H2O)6 Al2UO2(PO4)2 · 8H2O bassetite bergenite P21/n Mn(UO2)2(PO4)2 · 8H2O U4þPO4...deposits at Oklo, Peña Blanca, Shinkolobwe, and Koongarra will be described briefly below. (a) Oklo, Gabon |
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