Abstract:The Bokan Mountain arfvedsonite-aegirine granite is the only peralkaline acid intrusion actually known on the margin of the Canadian Cordillera. It is the end product of a peralkaline magmatic evolution and is characterized by genetically associated concentrations of U and Th. The U-Pb method on zircons has been used to date two samples: one from a barren peralkaline granite and one from a low-grade U-Th mineralized albitite. A typological study has revealed two genetically different populations of zircons in … Show more
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