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Geological Survey of Canada, Current Research (Online) no. 2000-F5

Geological Survey of Canada, Current Research (Online) no. 2000-F5
Author: Anthony Davidson
Publisher: Natural Resources Canada
Total Pages: 11
Release: 2000
Genre:
ISBN: 0660182319

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Presents a geochronological and geochemical study of the Barbers Lake and McLean plutons in the Grenville Province of Ontario, including comparisons of whole-rock analyses of these plutons with the Elphin and Leggat Lake plutons. The assignment of various plutons in the study area to one of several age groups is discussed.


Geological Survey of Canada, Current Research (Online) no. 2000-F4

Geological Survey of Canada, Current Research (Online) no. 2000-F4
Author: Anthony Davidson
Publisher: Natural Resources Canada
Total Pages: 17
Release: 2000
Genre: Igneous rocks
ISBN: 0660182300

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Presents geochronological age determinations of zircons from eight plutons in the Grenville Province, Ontario (Oso and Mountain Grove plutons in the Sharbot Lake domain; Silver Lake & Bennett Bay plutons and Fall River mangeritic augen gneiss associated with the Maberly shear zone; North Crosby & Pike Lake plutons in the north-west sheared part of the Frontenac terrane; and the Beales Mills pluton in the interior of the Frontenac terrane). The results are used to propose a re-interpretation of the tectonics of the Frontenac suite and the origin of the magmas responsible.


Geological Survey of Canada, Current Research (Online) no. 2000-F6

Geological Survey of Canada, Current Research (Online) no. 2000-F6
Author: T. Praamsma
Publisher: Natural Resources Canada
Total Pages: 10
Release: 2000
Genre:
ISBN: 0660182327

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This study examines aspects of the geological evolution of the Sharbot Lake domain and compares it with that of neighbouring domains & terranes in the Central metasedimentary belt, Grenville Province, Ontario. The study reports uranium-lead zircon & titanite geochronological ages for a granodiorite phase of the Pakenham intrusion from the northern part of the Sharbot Lake domain. The new data expand the known range of magmatism in this part of the belt, elucidate the early tectonic evolution of the domain, and constrain the timing of overprinting metamorphism. Possible links between the Pakenham structure and the Wolf Grove structure to the south-east are also discussed.