Churchill province

Regional Geology The Lac Cinquante uranium deposit is located in the Kivalliq Region of the Hearne Subprovince in the Western Churchill Province, Nunavut. The Western... 

Sandeman, H.A., Hanmer, S., Davis, W.J., Ryan, J.J., Peterson, T.D. 2004. Whole-rock and Nd isotopic geochemistry of Neoarchaean granitoids and their bearing on the evolution of the Central Hearne supracrustal belt. Western Churchill Province, Canada. Precambrian Research, 134, 143-167. 

Hoffman, P.F. 1990. Subdivision of the Churchill province and extent of the Trans-Hudson Orogen. In Lewry, J.F. Stauffer, M.R. (eds) Early Proterozoic Trans-Hudson Orogen of North America. Geological Association of Canada, Special Paper, 37, 15-39. 

Lewry, J. Sibbald, T. 1980. Thermotectonic Evolution of the Churchill Province in Northern Saskatchewan. Tectonophysics, 68, 45-82. 

Wardle, R.J. et al. 2002. The southeastern Churchill Province Synthesis of a Paleoproterozoic transpressional orogen. Canadian Journal of Earth Sciences, 39, 639-663. 

Churchill Province. These are all bounded to the south by Paleoproterozoic and Mesoproterozoic orogenic belts of the Makkovik and Grenville Provinces. Uranium occurs in many parts of the territory, in a wide range of environments, but the most important examples are all located within the Central Mineral Belt (CMB), a loosely-defined area at the intersection of the Main, Churchill, Makkovik and Grenville provinces (Fig. 1). 

Kerswill, J.A., Kjarsgaard, B.A., Bretzlaff, R. et al. (1999) Metallogeny and Geology of the HalfWay Hills Area, Central Churchill Province, Northwest Territories (Nunavut). Current Research — Geological Survey of Canada, Current Research 1999-C, pp. 29-41. 

N. Lesotho (Nixon and Boyd, 1973a) Jagersfontein, Kaapvaal craton (Burgess and Harte, 1999) Siberia (Sobolev, 1974 Boyd et al, 1993) Slave (Kopylova et al., 1999) Somerset Island, Churchill Province (Schmidberger and Francis, 1999)... 

Cratonic peridotite xenoliths from Lesotho, S. Africa, the Jericho kimberlite, Slave craton, and Somerset Island, Churchill Province, northern Canada, along with selected samples from... 

Gwiazda R. H., Hemming S. R., Broecker W. S., Onsttot T., and Mueller C. (1996c) Evidence from Ar-40/Ar-39 ages for a Churchill province source of ice-rafted amphiboles in Heinrich layer 2. J. Glacial. 42(142), 440-446. 

Donaldson, J. A. de Kemp, E. A. 1998. Archaean quartz arenites in the Canadian Shield examples from the Superior and Churchill provinces. Sedimentary Geology, 120, 153-176. 

Ross, G.M. Chiarenzelli, J.R. (1985) Paleoclimatic significance of widespread Proterozoic silcretes in the Bear and Churchill provinces of the northwestern Canadian Shield. Journal of Sedimentary Petrology 55, 196-204. 

That there is hope of finding terrestrial rocks somewhat older than 3,500 m.y. is implied in the secondary isochron study of igneous rocks about l,900-m.y.-old from the Churchill province in Canada (Doe, 1967). The slope of leads from three feldspars (A Pb/ Pb)/( A Pb/ Pb) is 0.521 the source age (t) may then be 3,800 m.y. 

Other vein deposits have lead isotopic compositions that closely approach a single stage generation. The origin of these deposits is problematical. In some localities, such as Aouli in North Africa, they may be related to formation of the nearby stratiform deposits at Mibladen, Morocco (Cahen et a/., 1958) however, there is not a stratiform deposit reported from the entire Churchill Province in North America with which to relate the Flin Flon vein deposit. 

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