Geological Evolution and Exploration Geochemistry of the Boomerang Lake Unconformity-type Uranium Prospect, Northwest Territories, Canada

Beyer, Steve R.; Kyser, Kurt; Hiatt, Eric E.; Fraser, I.A.

doi:10.5382/sp.15.2.15

Cited by 8 publications

(2 citation statements)

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“…The 2% HNO 3 leach method has been employed in the Athabasca, Thelon, and Kombolgie Basins (Holk et al, 2003;Alexandre et al, 2009a;Cloutier et al, 2009Cloutier et al, , 2010Beyer et al, 2010) to detect excess radiogenic Pb and pathfinder elements that dispersed from a potential U deposit, from which vectors to ore can be determined by following prospective trends. 207 Pb/ 206 Pb ratios less than 0.6 are termed radiogenic because they reflect an increasing proportion of radiogenic Pb that was possibly sourced from a Proterozoic U deposit.…”

Section: U-pb Isotope and Trace Element Geochemistry Of 2% Hno 3 Leacmentioning

confidence: 99%

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

et al. 2012

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The Paleoproterozoic Otish Basin, Quebec, hosts several uranium prospects that until recently remained underexplored and poorly understood. In this study, the Camie River U prospect, which shows similar characteristics to high-grade unconformity-related U deposits, is the focus of an integrated basin analysis in the western Otish Basin. Conglomerate and sandstone of the Indicator Formation, which were deposited in at least six depositional sequences, were affected by insignificant early diagenetic compaction and cementation. This allowed the formation of regional peak diagenetic aquifers, which became muscovite altered due to interaction with fluids having δ 18 O and δ 2 H values similar to those of seawater-influenced basinal brines at 250°C. U mineralization at Camie River occurred at 1721 ±20 Ma based on a 207 Pb/ 206 Pb date obtained by laser ablation of uraninite, which coincides with a phase of the Otish Gabbro intrusion that has been dated at ca. 1730 Ma. The intrusive event promoted circulation of U-bearing basinal brines, triggering U mineralization at several locations in the western Otish Basin. Interaction of basinal brines with the Otish Gabbro produced coarse-grained chlorite, tourmaline, and phengitic muscovite, which decreased the fluid-conducting capabilities of diagenetic aquifers and resulted in fault zone-and fracture-dominated fluid flow. Subsequent fluid alteration events produced limited U remobilization, sulfides, sudoite, and siderite between ca. 1670 and 1410 Ma based on mineral paragenesis and 40 Ar/ 39 Ar dates of muscovite. Metamorphic fluids having high δ 18 O values and temperatures around 300°C accompanied 1.2 to 1.0 Ga Grenville orogenesis and subgreenschist-grade metamorphism in the Otish Basin but were present at low water/rock ratios at Camie River and therefore produced little alteration. Post-Grenville uplift of the Otish Basin likely produced late, low-temperature alteration minerals that have been influenced by recent meteoric water, suggesting that the fault zones and fractures the minerals occupy remain as preferential fluid-flow pathways to the present day. Radiogenic Pb and the characteristic trace elements Mo + W + Nb have also preferentially dispersed from the mineralization along fault zones, fractures, and depositional sequence boundaries, and can be used to explore for Camie River-style U mineralization.

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Section: U-pb Isotope and Trace Element Geochemistry Of 2% Hno 3 Leacmentioning

confidence: 99%

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

et al. 2012

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“…In a few instances, samples with a phengite-like composition were called aluminoceladonites ( e.g . Pe-Piper, 1985; Ripp et al , 2009; Beyer et al , 2010), probably because of a certain ambiguity and controversy in the existing nomenclature of micas.…”

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Structural factors affecting the crystal-chemical variability in Al-rich K-dioctahedral 2M₁ micas

Zviagina

Drits

2019

Clay miner.

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To reveal the factors that determine the different ranges of compositional variations in high- and low-temperature Al-rich K-dioctahedral micas, relationships between structural parameters and cation composition were analysed for: (1) a series of synthetic 2M1 muscovite–phengite–aluminoceladonite samples; and (2) Al-rich, K-dioctahedral 2M1 micas with previously published refined structural data. The dependences of the unit-cell parameters on cation composition and the variations in tetrahedral and octahedral lateral dimensions and sheet thicknesses, interlayer distances and tetrahedral rotation angles were analysed and compared with those found previously for the series 1M trans-vacant (tv) illite–1M aluminoceladonite. The similarities in the variations of unit-cell parameters with cation composition observed in 2M1 and 1M natural and synthetic K-dioctahedral micas imply that these variations are controlled by similar – albeit not identical – structural factors. A major structural factor is the readjustment of the differently sized tetrahedral and octahedral sheets, which is realized in a different manner in micas formed under different pressure and temperature conditions.

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Reduction kinetics of aqueous U(VI) in acidic chloride brines to uraninite by methane, hydrogen or C-graphite under hydrothermal conditions: Implications for the genesis of unconformity-related uranium ore deposits

Dargent

Truche

Dubessy

et al. 2015

Geochimica et Cosmochimica Acta

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Geological Evolution and Exploration Geochemistry of the Boomerang Lake Unconformity-type Uranium Prospect, Northwest Territories, Canada

Cited by 8 publications

References 0 publications

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

Structural factors affecting the crystal-chemical variability in Al-rich K-dioctahedral 2M₁ micas

Reduction kinetics of aqueous U(VI) in acidic chloride brines to uraninite by methane, hydrogen or C-graphite under hydrothermal conditions: Implications for the genesis of unconformity-related uranium ore deposits

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Geological Evolution and Exploration Geochemistry of the Boomerang Lake Unconformity-type Uranium Prospect, Northwest Territories, Canada

Cited by 8 publications

References 0 publications

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

Basin Evolution and Unconformity-Related Uranium Mineralization: The Camie River U Prospect, Paleoproterozoic Otish Basin, Quebec

Structural factors affecting the crystal-chemical variability in Al-rich K-dioctahedral 2M1 micas

Reduction kinetics of aqueous U(VI) in acidic chloride brines to uraninite by methane, hydrogen or C-graphite under hydrothermal conditions: Implications for the genesis of unconformity-related uranium ore deposits

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Structural factors affecting the crystal-chemical variability in Al-rich K-dioctahedral 2M₁ micas