Mineralogy, geochemistry, and geochronology of the Little Nahanni Pegmatite Group, Logan Mountains, Southwestern Northwest Territories ...

• Main Author: Mauthner, Mark H. F.
• Format: Text
• Language: English
• Published: University of British Columbia 2009
• Subjects: Northwest Territories
• Online Access: https://dx.doi.org/10.14288/1.0052731; https://doi.library.ubc.ca/10.14288/1.0052731

While pegmatites of the Canadian shield have been extensively studied, Canadian Cordilleran pegmatites have not. A cooperative study of the regional geology of pegmatites in the Canadian Cordillera was begun in 1992, by workers from the University of British Columbia and the Canadian Museum of Nature. Attention in this thesis has been focussed on the Little Nahanni Pegmatite Group, located in the Logan Mountains, about 47 km northwest of Tungsten, Northwest Territories. Fieldwork and laboratory studies were conducted in an attempt to classify, outline and map the extent of the pegmatite group, to describe the setting, mineralogy, geochemistry and internal evolution of the pegmatite dikes, to examine the interaction between the pegmatitic fluid and the host rocks, and to date the pegmatite intrusive event. The group is hosted by deformed, upper greenschist to lower amphibolite facies metasedimentary rocks of the Upper Proterozoic Hyland Group. The dikes that make up the group are characteristic of the ...