Zircon from Canada

Zircon from Canada (UQ-Zl) The huge zircon grains of this rock are used as an in-house standard by the GEOTOP team [26]. The zircon was dated at 1142.5 0.7 Ma on 9 fractions using the ID-TIMS method. The average U and Pb concentrations are 254 and 48 ppm, respectively. The Pb method can be selected for common-Pb correction [21] for this Th/U range (-0.26). The method mainly requires an accurate... 

Scott, D. J., and Gauthier, G. (1996). Comparison ofTIMS (U-Pb) and laser ablation microprobe ICP-MS (Pb) techniques for age determination of detrital zircons from Paleopro-terozoic metasedimentary rocks from northeastern Laurentia, Canada, with tectonic implications. Chem. Ceol. 131(1-4), 127. 

Corfu, F. Noble, S. R. 1992. Genesis of the southern Abitibi greenstone belt, Superior Province, Canada evidence from zircon Hf isotope analyses using a single filament technique. Geo-chimica et Cosmochimica Acta, 56, 2081-2097. 

Iizuka, T., Horie, K., Komiya, T., Maruyama, S., Hirata, T., Hidaka, H., and Windley, B., 2006. 4.2 Ga zircon xenocryst in an Acasta gneiss from northwestern Canada evidence for early continental crust. Geology, 34, 245-8. 

Sano Y, Terada K, Hidaka H, Yokoyama K, Nutman AP (1999b) Palaeoproterozoic thermal events recorded in the 4.0-Ga Acasta gneiss, Canada Evidence from SHRIMP U-Pb dating of apatite and zircon. Geochim Cosmochim Acta 63 899-905... 

Non-refractory primary uranium minerals are rare, but uranothorianite has been reported from Palabora" and uraninite from Lake Nipissing, Ontario, Canada. Most car-bonatite uranium-bearing minerals me refractory phases. Uranium occurs as a minor or trace element in zircon, apatite, baddeleyite, perovskite, monazite, pyrochlore minerals, goyazite, bastnaesite, allanite, anatase, rutile, etc. The secondary mineral autunite occurs in soil covering the Araxa carbonatite. " ... 

J. (2003) Laser-ablation U/Th-Pb in situ dating of zircon and allanite an example from the October Harbour granite, central coastal Labrador, Canada. Can. Mineral, 41, 273-291. 

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