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Centennial Deposit

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Journal Article
Published: 01 June 2012
The Canadian Mineralogist (2012) 50 (3): 693–704.
...Paul Alexandre; Yulia Uvarova; T. Kurtis Kyser Abstract Both uranous and uranyl minerals are present in the Centennial unconformity-type U deposit situated in the SW Athabasca Basin, Canada. At least two generations of uraninite are present (disseminated and massive), often strongly altered...
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Journal Article
Journal: Economic Geology
Published: 01 May 2012
Economic Geology (2012) 107 (3): 385–400.
...P. Alexandre; K. Kyser; D. Jiricka; G. Witt Abstract The Centennial U deposit is situated in the south-central Athabasca Basin (Canada) and straddles the unconformity between early Paleoproterozoic to Archean metasedimentary and metavolcanic rocks and granitoids, and the clastic sediments...
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Journal Article
Published: 01 September 2016
The Canadian Mineralogist (2016) 54 (5): 1205–1228.
... assemblage in the Athabasca Group sandstones, the illite-sudoite assemblage of the altered paleo-regolith, and alteration zones surrounding uranium deposits. In the vicinity of the Centennial deposit, where illite and sudoite replace coarse-grained aluminosilicate porphyroblasts in the basement phyllitic...
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First thumbnail for: Composition of Large Zoned Aluminum Phosphate Sulf...
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Journal Article
Journal: Economic Geology
Published: 01 May 2014
Economic Geology (2014) 109 (3): 539–566.
...Kyle D. Reid; Kevin Ansdell; Dan Jiricka; Gary Witt; Colin Card Abstract The Centennial unconformity-related uranium deposit represents the first significant uranium mineralization along the Snowbird tectonic zone in the south-central part of the Athabasca Basin. The deposit is associated...
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Cross sections of the mineralized trend at the Centennial deposit: (A) L10+00N and (B) L10+50N. The yellow stars show sample locations for the APS examined in this study. Shading represents the predominant pervasive alteration. The legend is applicable to both cross sections (modified after Reid et al. 2014).
Published: 01 September 2016
Fig. 3. Cross sections of the mineralized trend at the Centennial deposit: (A) L10+00N and (B) L10+50N. The yellow stars show sample locations for the APS examined in this study. Shading represents the predominant pervasive alteration. The legend is applicable to both cross sections (modified
Image
Simplified map of the geology of the Centennial deposit, showing the basement rocks at the unconformity and the extent of mineralization, overlain on a first vertical derivative aeromagnetic map.
Published: 01 May 2014
Fig. 3 Simplified map of the geology of the Centennial deposit, showing the basement rocks at the unconformity and the extent of mineralization, overlain on a first vertical derivative aeromagnetic map.
Image
Cross section through the Centennial deposit along L10+00N looking north. The lighter shading for each rock type represents sudoite-clinochore, and illite-sudoite alteration assemblages, which overprint the original rock. Question marks indicate extrapolation of rock types and alteration not constrained by drill holes. The location of the cross section is shown in Figure 3. MFb = Manitou Falls Formation (Bird member), MFw = Manitou Falls Formation (Warnes member), the boundary between the MFb and MFw is located at the top of the “Conglomeratic Layer.” ASL = above sea level. Note that the unconformity is approximately 800 to 830 m below the surface.
Published: 01 May 2014
Fig. 4 Cross section through the Centennial deposit along L10+00N looking north. The lighter shading for each rock type represents sudoite-clinochore, and illite-sudoite alteration assemblages, which overprint the original rock. Question marks indicate extrapolation of rock types and alteration
Image
Basement rock types at the Centennial deposit. A. VR-38 878.3 (hole no. and depth in meters)—tight to isoclinal folded quartzite layer (dark gray) in muscovite-rich phyllite. B. VR-31W4 850.2—muscovite-rich phyllite with metamorphic tourmaline. C. VR-31W5 832.3—altered chlorite-muscovite phyllite with sigma porphyroblast indicating sinistral west-overeast reverse displacement. D. VR-04 880.1—pyrite-bearing chlorite-muscovite phyllite. E. VR-22 880.5—relatively fresh granite K-feldspar porphyroclastic granite. F. VR-04 881.3—crenulation cleavage developed in sulfide-chlorite-muscovite phyllite. G. VR-18W2 815.2—ductile contact between granite and quartz-muscovite phyllite. H. VR-22 874.3—steeply dipping mylonitic fabric crosscut by shallower shear bands in granite. I. VR-31W3 846.1—diabase (light brown) cutting quartzite (light gray). J. VR-40W2 841.0—subophitic clinopyroxene (pink-purple) and plagioclase (gray laths) in relatively fresh diabase (XPL).
Published: 01 May 2014
Fig. 5 Basement rock types at the Centennial deposit. A. VR-38 878.3 (hole no. and depth in meters)—tight to isoclinal folded quartzite layer (dark gray) in muscovite-rich phyllite. B. VR-31W4 850.2—muscovite-rich phyllite with metamorphic tourmaline. C. VR-31W5 832.3—altered chlorite-muscovite
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Paragenesis of the Centennial deposit. Timing of A, B, C, and D correspond to representative time slices in Figure 13. See text for details and definition of abbreviations.
Published: 01 May 2014
Fig. 11 Paragenesis of the Centennial deposit. Timing of A, B, C, and D correspond to representative time slices in Figure 13 . See text for details and definition of abbreviations.
Image
Multistage evolution of the Centennial deposit (arrows represent possible fluid-flow directions). The approximate timing within the paragenesis is given in Figure 11. A. Potential extent of chemical weathering and regolith development and erosion prior to deposition of the Athabasca Group. B. Athabasca Group deposition, diagenesis, and uranium mineralization. C. Postdiabase hydrothermal activity (a = fracture hosted clinochlore, b = clinochlore associated with sudoite, c = local clinochlore in Athabasca Group). D. Late meteoric water and development of kaolinite (K2).
Published: 01 May 2014
Fig. 13 Multistage evolution of the Centennial deposit (arrows represent possible fluid-flow directions). The approximate timing within the paragenesis is given in Figure 11 . A. Potential extent of chemical weathering and regolith development and erosion prior to deposition of the Athabasca
Image
A. Ternary molar plots of chlorite compositions from the Centennial deposit. The green boxes early or preore chlorites from phyllites and granite. Blue circles are mineralization-associated chlorites from phyllite and granite. Yellow triangles are vein, void and pervasive postdiabase chlorites from phyllites, granite, and the Athabasca Group. Red diamonds are chlorites within diabase. Preore chlorites from Alexandre et al. (2005) and Wheeler River Zone K chlorites from Cloutier et al. (2010a) are shown by the light gray dash outlines. B. Illite composition plot: triangles = illite from altered granite, and phyllites; diamonds = phengitic muscovite in diabase; squares = biotites in diabase. C. Triangular plot of wt % oxides showing illites (triangles) and adularia (circles). Note: outline shows illite composition from multiple unconformity-related uranium deposits in the Athabasca Basin (reported in Cloutier et al., 2010a).
Published: 01 May 2014
Fig. 12 A. Ternary molar plots of chlorite compositions from the Centennial deposit. The green boxes early or preore chlorites from phyllites and granite. Blue circles are mineralization-associated chlorites from phyllite and granite. Yellow triangles are vein, void and pervasive postdiabase
Image
Geological situation of the Centennial deposit, with (A) its position within the Athabasca Basin in northern Saskatchewan; (B) an outline of the deposit and drill holes (W for wedged hole with the number of wedges); and (C) a cross section of fence VR31, which was sampled for the present work.
Published: 01 June 2012
Fig. 1 Geological situation of the Centennial deposit, with (A) its position within the Athabasca Basin in northern Saskatchewan; (B) an outline of the deposit and drill holes (W for wedged hole with the number of wedges); and (C) a cross section of fence VR31, which was sampled for the present
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U minerals observed at Virgin River-NNE and the Centennial deposit. A: disseminated uraninite (U) forming in the pore space between quartz grains (Q). B: visually fresh (U1fresh) and altered (U1altered) main stage massive uraninite, followed by late colloform uraninite (U2). C: massive and strongly altered uraninite (U1) followed by colloform and unaltered uraninite (U2). Inset: U2 structure. D: a relatively large uranophane (Uph) vein showing well-crystallized individual crystals and cutting through a mixture of hematite and chlorite (H-Chl). E: a vein of late fibrous coffinite (Cof) cutting though hematite (H) and uraninite (U).
Published: 01 May 2012
Fig. 4 U minerals observed at Virgin River-NNE and the Centennial deposit. A: disseminated uraninite (U) forming in the pore space between quartz grains (Q). B: visually fresh (U 1 fresh) and altered (U 1 altered) main stage massive uraninite, followed by late colloform uraninite (U 2 ). C
Journal Article
Published: 01 November 1987
Canadian Journal of Earth Sciences (1987) 24 (11): 2305–2315.
... rocks. The Flin Flon area around the Centennial deposit, in the western part of the belt, has been metamorphosed to low greenschist facies. Near the Spruce Point deposit, in the central part of the belt, the metamorphic conditions are estimated to be of the upper greenschist facies, with a temperature...
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Generalized paragenesis for the Virgin River project, combining observations from Virgin River-NNE and from the Centennial deposit.
Published: 01 May 2012
Fig. 2 Generalized paragenesis for the Virgin River project, combining observations from Virgin River-NNE and from the Centennial deposit.
Image
Plan view of the basement geology and the U mineralized trend at the Centennial deposit overlain on a first vertical derivative magnetic map (from Reid et al. 2014). The position of L10+00N and L10+50N (A and B of Fig. 3) are shown.
Published: 01 September 2016
Fig. 2. Plan view of the basement geology and the U mineralized trend at the Centennial deposit overlain on a first vertical derivative magnetic map (from Reid et al . 2014 ). The position of L10+00N and L10+50N (A and B of Fig. 3 ) are shown.
Image
Regional geology and major structures of the Virgin River trend overlain on a first vertical derivative aeromagnetic map. The inset shows the geology of outcrops in the Westgate Lake area (modified from Card, 2009) and the location of the Centennial deposit (box outlines Fig. 3).
Published: 01 May 2014
Fig. 2 Regional geology and major structures of the Virgin River trend overlain on a first vertical derivative aeromagnetic map. The inset shows the geology of outcrops in the Westgate Lake area (modified from Card, 2009 ) and the location of the Centennial deposit (box outlines Fig. 3 ).
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Map showing the stratigraphic subdivisions of the Athabasca Group in the Athabasca Basin, underlying domains, and major unconformity-related uranium deposits (after Jefferson et al., 2007). The Centennial deposit is identified by a red star. The inset figure shows the location of the Athabasca Basin (yellow) in North America. Major brittle reactivated shear zones: BB = Black Bay, BLSZ = Black Lake shear aone, CB = Cable Bay, GR = Grease River, H = Harrison, RO = Robillard, VRSZ = Virgin River shear zone.
Published: 01 May 2014
Fig. 1 Map showing the stratigraphic subdivisions of the Athabasca Group in the Athabasca Basin, underlying domains, and major unconformity-related uranium deposits (after Jefferson et al., 2007 ). The Centennial deposit is identified by a red star. The inset figure shows the location
Image
General geologic setting of the Virgin River project (VR), situated in Canada (A) and in the Athabasca Basin (B). In C are shown the conductive lithology and the main conductors (defined by airborne geophysics), as well as the drill holes sampled in the Virgin River-NNE zone. The outline of the Centennial deposit, with its drill holes to date, is shown in D. An interpretive cross section, corresponding to fence VR31 (pilot hole and five wedges), is shown in E.
Published: 01 May 2012
of the Centennial deposit, with its drill holes to date, is shown in D. An interpretive cross section, corresponding to fence VR31 (pilot hole and five wedges), is shown in E.
Image
Geology of the Athabasca Basin and surrounding Precambrian domains in northern Saskatchewan and Alberta (from Reid et al. 2014, and modified after Jefferson et al. 2007). The location of the Centennial deposit is identified by the red star. Major brittle reactivated shear zones: BB – Black Bay, BLSZ – Black Lake Shear Zone, CB – Cable Bay, GR – Grease River, H – Harrison, RO – Robillard, VRSZ – Virgin River Shear Zone.
Published: 01 September 2016
Fig. 1. Geology of the Athabasca Basin and surrounding Precambrian domains in northern Saskatchewan and Alberta (from Reid et al . 2014 , and modified after Jefferson et al . 2007 ). The location of the Centennial deposit is identified by the red star. Major brittle reactivated shear zones