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Nabarlek Deposit

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Journal Article

Geology of the Nabarlek uranium deposit, Northern Territory, Australia

A. R. Wilde, V. J. Wall
Journal: Economic Geology
Published: 01 August 1987
Economic Geology (1987) 82 (5): 1152–1168.
DOI: https://doi.org/10.2113/gsecongeo.82.5.1152
...A. R. Wilde; V. J. Wall Abstract The Nabarlek deposit is an unusually high-grade uranium orebody (1.84% U 3 O 8 , 12,000 metric tons) hosted by amphibolite and semipelitic schist of lower Proterozoic age. It is unusual in the Alligator Rivers uranium field in being hosted by amphibolite...
View PDF for article title, Geology of the <span class="search-highlight">Nabarlek</span> uranium <span class="search-highlight">deposit</span>, Northern Territory, Australia
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Journal Article

SIGNIFICANCE OF ALTERATION ASSEMBLAGES FOR THE ORIGIN AND EVOLUTION OF THE PROTEROZOIC NABARLEK UNCONFORMITY-RELATED URANIUM DEPOSIT, NORTHERN TERRITORY, AUSTRALIA—A REPLY

Paul A. Polito, T. Kurt Kyser, Jim Marlatt, Paul Alexandre, Zia Bajwah, Garth Drever
Journal: Economic Geology
Published: 01 August 2004
Economic Geology (2004) 99 (5): 1045–1048.
DOI: https://doi.org/10.2113/gsecongeo.99.5.1045
.... , in Ferguson , J. , and Goleby , A.B. , eds., Uranium in the Pine Creek geosyncline : Vienna , International Atomic Energy Agency , p. 397 – 406 . Ewers , G.R. , and Ferguson J. , 1980 , Mineralogy of the Jabiluka, Ranger, Koongarra and Nabarlek uranium deposits , in Ferguson...
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View PDF for article title, SIGNIFICANCE OF ALTERATION ASSEMBLAGES FOR THE ORIGIN AND EVOLUTION OF THE PROTEROZOIC <span class="search-highlight">NABARLEK</span> UNCONFORMITY-RELATED URANIUM <span class="search-highlight">DEPOSIT</span>, NORTHERN TERRITORY, AUSTRALIA—A REPLY
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Journal Article

Significance of Alteration Assemblages for the Origin and Evolution of the Proterozoic Nabarlek Unconformity-Related Uranium Deposit, Northern Territory, Australia

Paul A. Polito, T. KURT KYSER, Jim Marlatt, Paul Alexandre, Zia Bajwah, Garth Drever
Journal: Economic Geology
Published: 01 January 2004
Economic Geology (2004) 99 (1): 113–139.
DOI: https://doi.org/10.2113/gsecongeo.99.1.113
...Paul A. Polito; T. KURT KYSER; Jim Marlatt; Paul Alexandre; Zia Bajwah; Garth Drever Abstract The Proterozoic Nabarlek unconformity-related uranium deposit in the Alligator Rivers uranium field is hosted by Paleoproterozoic amphibolite-grade, metamorphosed semipelitic sedimentary rocks...
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View PDF for article title, Significance of Alteration Assemblages for the Origin and Evolution of the Proterozoic <span class="search-highlight">Nabarlek</span> Unconformity-Related Uranium <span class="search-highlight">Deposit</span>, Northern Territory, Australia
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Journal Article

SIGNIFICANCE OF ALTERATION ASSEMBLAGES FOR THE ORIGIN AND EVOLUTION OF THE PROTEROZOIC NABARLEK UNCONFORMITY-RELATED URANIUM DEPOSIT, NORTHERN TERRITORY, AUSTRALIA—A DISCUSSION

Andy Wilde
Journal: Economic Geology
Published: 01 August 2004
Economic Geology (2004) 99 (5): 1041–1044.
DOI: https://doi.org/10.2113/gsecongeo.99.5.1041
...) of thin section showing interlayering of biotite and chlorite with anatase. Jabiluka deposit (BN054V-588m). d. TEM image of chlorite after biotite showing extremely fine interlayering of Fe- and Mg-rich chlorites. Nabarlek (DH96 60m). All images are from Wilde (1988) . Sir: In their recent paper...
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View PDF for article title, SIGNIFICANCE OF ALTERATION ASSEMBLAGES FOR THE ORIGIN AND EVOLUTION OF THE PROTEROZOIC <span class="search-highlight">NABARLEK</span> UNCONFORMITY-RELATED URANIUM <span class="search-highlight">DEPOSIT</span>, NORTHERN TERRITORY, AUSTRALIA—A DISCUSSION
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Journal Article

The Nabarlek uranium deposit, Northern Territory, Australia; some petrologic and geochemical constraints on genesis

G. R. Ewers, John Ferguson, T. H. Donnelly
Journal: Economic Geology
Published: 01 August 1983
Economic Geology (1983) 78 (5): 823–837.
DOI: https://doi.org/10.2113/gsecongeo.78.5.823
...G. R. Ewers; John Ferguson; T. H. Donnelly Abstract Deposit is confined to a shear zone in contorted and metasomatized early Proterozoic schists. Occurs near an unconformity. Massive chlorite-sericite-hematite rocks. Uraninite intergrown with chlorite. Sericitization, redox reactions. Th ratios...
View PDF for article title, The <span class="search-highlight">Nabarlek</span> uranium <span class="search-highlight">deposit</span>, Northern Territory, Australia; some petrologic and geochemical constraints on genesis
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F IG . 2. a. Local outcrop geology of the Nabarlek deposit as it occurred p...

Published: 01 January 2004
F IG . 2. a. Local outcrop geology of the Nabarlek deposit as it occurred prior to mining operations, showing drill holes sampled, analyzed, or cited in this paper. Open rectangle represents area of enlargement shown in (b), which details the geology exposed during mining of the deposit. Modified
Journal Article

Age of uranium mineralization at the Jabiluka and Ranger deposits, Northern Territory, Australia; new U-Pb isotope evidence

K. R. Ludwig, R. I. Grauch, C. J. Nutt, J. T. Nash, David Frishman, K. R. Simmons
Journal: Economic Geology
Published: 01 July 1987
Economic Geology (1987) 82 (4): 857–874.
DOI: https://doi.org/10.2113/gsecongeo.82.4.857
... determined approximately 900-m.y. age of the Nabarlek deposit), despite the fact that all of the deposits share strong similarities in their host rock, mineralogy, alteration, and geologic setting.Both Ranger and Jabiluka reflect a common, profound isotopic disturbance at about 400 to 600 m.y...
View PDF for article title, Age of uranium mineralization at the Jabiluka and Ranger <span class="search-highlight">deposits</span>, Northern Territory, Australia; new U-Pb isotope evidence
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F IG . 8. Ternary diagram showing the chemical variation of different chlor...

Published: 01 January 2004
F IG . 8. Ternary diagram showing the chemical variation of different chlorite types (in wt %) around the Nabarlek deposit. Shaded area represents the field occupied by pristine biotite assuming the molecular formula for the most common biotite species presented in Deer et al. (1992) .
Image

F IG . 4. Paragenetic diagram summarizing the timing of alteration assembla...

Published: 01 January 2004
F IG . 4. Paragenetic diagram summarizing the timing of alteration assemblages around the Nabarlek deposit. The ages presented for each event are based on crosscutting relationships that have been constrained by K/Ar ages for the Q 1 quartz veins ( Page et al., 1980 ), 40 Ar/ 39 Ar and U/Pb ages
Journal Article

Nd-Sr isotope constraints on the age and origin of unconformity-type uranium deposits in the Alligator Rivers uranium field, Northern Territory, Australia

Roland Maas
Journal: Economic Geology
Published: 01 February 1989
Economic Geology (1989) 84 (1): 64–90.
DOI: https://doi.org/10.2113/gsecongeo.84.1.64
...Roland Maas Abstract The results of an Sm-Nd and Rb-Sr isotope study on the large and rich unconformity-type uranium-(gold-platinum-group elements) deposits in northern Australia indicate identical Sm-Nd ages for primary uranium mineralization at Nabarlek (1,616 + or - 50 m.y.) and Jabiluka II...
View PDF for article title, Nd-Sr isotope constraints on the age and origin of unconformity-type uranium <span class="search-highlight">deposits</span> in the Alligator Rivers uranium field, Northern Territory, Australia
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F IG . 18. A simplistic, schematic representation of the formation of alter...

Published: 01 January 2004
F IG . 18. A simplistic, schematic representation of the formation of alteration styles surrounding the Nabarlek uranium deposit. a. Faults and shear zones, most likely to have been active during rapid uplift of the Myra Falls Metamorphics, allow basement-derived fluids (large arrows) to circulate
Journal Article

Clay Alteration Associated with Proterozoic Unconformity-Type Uranium Deposits in the East Alligator Rivers Uranium Field, Northern Territory, Australia

D. Beaufort, P. Patrier, E. Laverret, P. Bruneton, J. Mondy
Journal: Economic Geology
Published: 01 May 2005
Economic Geology (2005) 100 (3): 515–536.
DOI: https://doi.org/10.2113/gsecongeo.100.3.515
..., decline or open pit in seven areas ( Fig 1 ). Their main characteristics are summarized in the Appendix. They come from the surroundings of Jabiluka and Nabarlek uranium deposits or mineralized prospects (Caramal, South Horn, SML boundary) and from exploration drill holes scattered in West Arnhem land...
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View PDF for article title, Clay Alteration Associated with Proterozoic Unconformity-Type Uranium <span class="search-highlight">Deposits</span> in the East Alligator Rivers Uranium Field, Northern Territory, Australia
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Journal Article

A Paragenetic and Isotopic Study of the Proterozoic Westmoreland Uranium Deposits, Southern McArthur Basin, Northern Territory, Australia

Paul A. Polito, T. Kurt Kyser, Gerard Rheinberger, Peter N. Southgate
Journal: Economic Geology
Published: 01 September 2005
Economic Geology (2005) 100 (6): 1243–1260.
DOI: https://doi.org/10.2113/gsecongeo.100.6.1243
...-hosted Nabarlek and Jabiluka uranium deposits in the northern McArthur basin, suggesting that the Westmoreland uranium field might also be prospective for basement-hosted uranium deposits where suitable structural and chemical traps can be found. The northern and southern ends of the McArthur basin...
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View PDF for article title, A Paragenetic and Isotopic Study of the Proterozoic Westmoreland Uranium <span class="search-highlight">Deposits</span>, Southern McArthur Basin, Northern Territory, Australia
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Journal Article

Fluid inclusion evidence on the origin of some Australian unconformity-related uranium deposits

A. R. Wilde, T. P. Mernagh, M. S. Bloom, Christopher F. Hoffmann
Journal: Economic Geology
Published: 01 October 1989
Economic Geology (1989) 84 (6): 1627–1642.
DOI: https://doi.org/10.2113/gsecongeo.84.6.1627
...A. R. Wilde; T. P. Mernagh; M. S. Bloom; Christopher F. Hoffmann Abstract Fluid inclusions in altered and unaltered host rocks and hydrothermal quartz, calcite, and dolomite from the unconformity-related uranium deposits of Koongarra, Nabarlek, and Jabiluka (Northern Territory, Australia) were...
View PDF for article title, Fluid inclusion evidence on the origin of some Australian unconformity-related uranium <span class="search-highlight">deposits</span>
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F ig . 1. a. Photomicrograph, plane-polarized light, of altered schist from...

Published: 01 August 2004
) of thin section showing interlayering of biotite and chlorite with anatase. Jabiluka deposit (BN054V-588m). d. TEM image of chlorite after biotite showing extremely fine interlayering of Fe- and Mg-rich chlorites. Nabarlek (DH96 60m). All images are from Wilde (1988) .
Journal Article

Geologic setting and concepts on origin of uranium deposits in the East Alligator River region, N.T., Australia

M. R. Hegge, J. C. Rowntree
Journal: Economic Geology
Published: 01 December 1978
Economic Geology (1978) 73 (8): 1420–1429.
DOI: https://doi.org/10.2113/gsecongeo.73.8.1420
...M. R. Hegge; J. C. Rowntree Abstract Major uranium deposits, including Jabiluka, Ranger, Koongarra, and Nabarlek, plus numerous smaller prospects, occur in metamorphosed lower Proterozoic psammatic, pelitic, and chemical sediments of the Cahill Formation (South Alligator Group...
View PDF for article title, Geologic setting and concepts on origin of uranium <span class="search-highlight">deposits</span> in the East Alligator River region, N.T., Australia
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Journal Article

Measurement of U-Pb ages of uraninite and davidite by laser ablation-HR-ICP-MS

Don Chipley, Paul A. Polito, T. Kurtis Kyser
Published: 01 November 2007
American Mineralogist (2007) 92 (11-12): 1925–1935.
DOI: https://doi.org/10.2138/am.2007.2226
..., J., Alexandre, P., Bajwah, Z., and Drever, G. ( 2004 ) Significance of alteration assemblages for the origin and evolution of the Proterozoic Nabarlek unconformity-related uranium deposit, Northern Territory, Australia. Economic Geology , 99 , 111 –139. Tack, L., Wingate, M.T.D., Liegeois, J...
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View PDF for article title, Measurement of U-Pb ages of uraninite and davidite by laser ablation-HR-ICP-MS
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F ig . 2. 40 Ar/ 39 Ar age spectra for two metamorphic muscovite samples e...

Published: 01 August 2004
F ig . 2. 40 Ar/ 39 Ar age spectra for two metamorphic muscovite samples extracted from the Footwall Amphibolite at the Nabarlek uranium deposit revealing plateau ages according to the definition of McDougall and Harrison (1999) .
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F IG . 12. Calculated δ 18 O and δ D values for various fluids associate...

Published: 01 January 2004
of the fluid that transported and deposited uranium in the Nabarlek fault (200°C). δ 18 O values outside of area B indicate alteration at low fluid/rock ratios (high δ 18 O values) or subsequent alteration by late-stage basinal fluids (light δ D values). Area C corresponds to the fluid values calculated
Image
Fig. 2. Conceptual north-south structural-stratigraphic section of West Arnhem land, including the main geologic features of the East Alligator Rivers uranium field and the setting of uranium deposits (Ranger, Nabarlek) and prospects (U 65, South Horn). Modified from Afmeco Mining and Exploration Pty Ltd. (AFMEX) unpublished map (reproducted with the permission of AFMEX).

F ig . 2. Conceptual north-south structural-stratigraphic section of West A...

Published: 01 May 2005
F ig . 2. Conceptual north-south structural-stratigraphic section of West Arnhem land, including the main geologic features of the East Alligator Rivers uranium field and the setting of uranium deposits (Ranger, Nabarlek) and prospects (U 65, South Horn). Modified from Afmeco Mining and Exploration