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fission

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Journal Article
Journal: GSA Bulletin
Published: 21 October 2022
GSA Bulletin (2023) 135 (5-6): 1587–1601.
.... However, its growth process and dynamic mechanism remain unclear. Here, we present new fission track data obtained along a N-S transect near the Puruo Kangri Mountain in the central zone of the Northern Qiangtang terrane. The completely reset apatite fission track ages of detrital samples range from 65.1...
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Journal Article
Published: 21 November 2018
Bulletin de la Société Géologique de France (2018) 189 (4-6): 16.
... a valuable and refined exhumation history and to identify the presence of a former sedimentary cover presently completely eroded. Apatite fission-track (AFT) data have been acquired on the northern part of the Ardenne Massif close to the Variscan front and in the southern Brabant, in particular...
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Journal Article
Published: 12 September 2018
Bulletin de la Société Géologique de France (2018) 189 (3): 12.
... massif, Sardinia and Corsica. Detrital apatite fission-track dating and zircon fission-track/U-Pb double dating of samples collected from the Saint Antonin basin confirm sediment provenance and allow obtaining first-order estimates of drainage basin maximum and long-term average exhumation rates. Whereas...
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Journal Article
Published: 01 January 2017
The Journal of Geology (2017) 125 (1): 65–82.
... folding and fault slipping along detachment layers, whereas the Tiklik thrust zone involves basement, with its deformation driven by the currently steeply dipping Tiklik fault. Results from apatite fission track thermochronology in combination with growth strata and balanced cross section indicate...
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Journal Article
Journal: Elements
Published: 01 February 2013
Elements (2013) 9 (1): 53–57.
... of Hahn's who had been forced to flee Germany as a result of Nazi persecution, and her nephew, Otto Frisch, then provided a theoretical explanation for the new phenomenon, which they called “fission.” The discovery of fission triggered another period of intense research and, with the onset of World War...
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Journal Article
Journal: Elements
Published: 01 June 2012
Elements (2012) 8 (3): 181–182.
... C. Ewing The amount of released radioactivity during a nuclear accident depends on the type of nuclear fuel, the burnup or the extent to which the 235 U has fissioned, the chemical properties of the radionuclide-forming compounds in the fuel, and the maximum temperatures reached during...
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Journal Article
Journal: Elements
Published: 01 June 2012
Elements (2012) 8 (3): 213–219.
...Bernd Grambow; Christophe Poinssot Abstract Used nuclear fuel is a redox-sensitive semiconductor consisting of uranium dioxide containing a few percent of fission products and up to about one percent transuranium elements, mainly plutonium. The rapid increase in temperature in the cores...
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Journal Article
Published: 01 May 2009
American Mineralogist (2009) 94 (5-6): 856–858.
Journal Article
Published: 01 May 2009
American Mineralogist (2009) 94 (5-6): 827–837.
... coffinite coffinite uraninite natural fission reactor Bangombé 23 01 2009 10 10 2008 T able 2. Representative analyses of coffinite-(ii) Oxides 1 2 3 4 5 6 7 8 Note : As 2 O 5 , Pr 2 O 3 , Dy 2 O 3 , Er 2 O 3 = below detection limits. Al 2 O...
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Journal Article
Journal: Elements
Published: 01 December 2006
Elements (2006) 2 (6): 343–349.
... semiconductor consisting of a fine-grained (5-10 μm), polycrystalline aggregate containing fission-product and transuranium elements in concentrations of 4 to 6 atomic percent. The challenge is to predict the long-term behavior of UO 2 under a range of redox conditions. Experimental results and observations...
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Journal Article
Published: 01 December 2005
The Canadian Mineralogist (2005) 43 (6): 2099–2116.
... for the increased production of energy: open, closed, or a symbiotic combination of different types of reactor (such as, thermal and fast neutron reactors). The neutron energy spectrum has a significant effect on the fission product yield, and the consumption of long-lived actinides, by fission, is best achieved...
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Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 697–715.
...Rodney C. Ewing Abstract L’élimination des produits de fission et des actinides générés aux centrales d’énergie nucléaire constitue un des principaux défis environnementaux du vingt-et-unième siècle. Parce que certains des produits de fission ( e.g. , 99 Tc, 129 I, 79 Se et 135 Cs) et...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2001
GSA Bulletin (2001) 113 (1): 32–62.
...Keld Alstrup Jensen; Rodney C. Ewing Abstract Nuclear fission reactors occur in the Oklo-Okélobondo uranium deposit in southeast Gabon. The Okélobondo reactor zone (RZOKE, ∼310 m depth) was the last reactor zone to be excavated before mining was terminated in December 1997. RZOKE is situated...
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Journal Article
Published: 01 January 2001
Reviews in Mineralogy and Geochemistry (2001) 45 (1): 163–205.
... to decay spontaneously. Radioactive isotopes, however, undergo spontaneous decay through emission of subatomic particles (β − and β + decay, α decay) or by fragmentation of the parent nucleus (fission). The decay produces a daughter (or daughters) atom that itself is either stable or radioactive. Nuclei...
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Journal Article
Published: 01 January 1999
Reviews in Mineralogy and Geochemistry (1999) 38 (1): 321–392.
Journal Article
Published: 01 May 1998
Bulletin de la Société Géologique de France (1998) 169 (3): 459–466.
Journal Article
Published: 01 April 1996
Journal of the Geological Society (1996) 153 (2): 191–195.
...Y. CHEN; M. A. ZENTILLI; A. H. CLARK; E. FARRAR; A. M. GRIST; J. WILLIS-RICHARDS Abstract Apatite fission-track (AFT) dates for granitic samples from surface exposures and deep boreholes in the 293.3 ± 1.2 Ma Carnmenellis granite, west Cornwall, decrease radically from 130 ± 28 (2 σ ) Ma at surface...
Journal Article
Published: 01 January 1995
Environmental & Engineering Geoscience (1995) I (1): 108–110.
Journal Article
Journal: Geology
Published: 01 July 1993
Geology (1993) 21 (7): 655–658.
...Bartholomew Nagy; François Gauthier-Lafaye; Philippe Holliger; David J. Mossman; Joel S. Leventhal; Mark J. Rigali Abstract Of the sixteen known Oklo and the Bangombé natural fission reactors (hydro-thermally altered clastic sedimentary rocks that contain abundant uraninite and authigenic clay...
Journal Article
Journal: Economic Geology
Published: 01 December 1989
Economic Geology (1989) 84 (8): 2286–2295.
...F. Gauthier-Lafaye; F. Weber; H. Ohmoto Abstract Fourteen natural fission reactors are known to date in three different ore deposits located in the Franceville basin. The most famous and the first discovered are those in the Oklo uranium ore deposit. Petrographic, geochemical, and oxygen isotope...