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TitleNortheast Thelon Basin Uranium Project - GEM
AuthorJefferson, C; Potter, EORCID logo
SourceNunavut mineral exploration, mining and geoscience overview 2011; 2012 p. 13-14
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20120113
Mediapaper; on-line; digital
AreaBaker Lake; Lac Cinquante
Lat/Long WENS-98.0000 -96.0000 65.0000 64.0000
Subjectseconomic geology; uranium; uranium deposits; mineral potential; basement geology; Archean; Kiggavik deposits; Precambrian; Proterozoic
ProgramGEM: Geo-mapping for Energy and Minerals Uranium
Released2012 01 01
AbstractThe Geological Survey of Canada (GSC) is testing the hypothesis that world class uranium deposit knowledge from Saskatchewan can be adapted to Nunavut. Knowledge of "basement" rocks that underlie sedimentary basins is required to test this hypothesis because deposits are located in the basement near the covering strata. Geological mapping improves basement knowledge around the basins. Integrated geophysical data "see through" the basins and soil into the basement. In regions northwest and south of Baker Lake, collaboration with 12 companies and 10 universities is integrating industry- and new government-acquired geophysics with geology and satellite imagery, and training young scientists. Compilations (GSC Open Files 6510, 6862, 6944, 6949 and 6950), talks and other publications are transferring timely knowledge while we build comprehensive legacy databases.
The Kiggavik deposits west of Baker Lake are in a 2.8 - 1.75 gigayear-old (Ga) basement complex of interlayered and interfolded sedimentary and volcanic sequences transected by ~1.83 and ~1.75 Ga potassium rich intrusions. Hot salty water carried uranium along intersecting steep faults, altered the basement rocks to soft clay and iron oxide minerals, and formed uranium deposits at ~1.6 to 1.4 Ga near small 1.75 Ga granite bodies. Similar faults developed and preserved overlying sedimentary and volcanic basins from about 1.83 - 1.5 Ga Parallel new knowledge of the ~1.83 Ga Lac Cinquante district south of Baker Lake, and of the Beaverlodge and Athabasca districts in Saskatchewan, is informing stakeholders about sustainable uranium resource potential in Nunavut.

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