Abstract
The Manitouwadge greenstone belt and its Cu-Zn deposits occur within a highly deformed remnant of upper amphibolite-facies supracrustal rocks adjacent to the Wawa-Quetico subprovince boundary. On the basis of structural and lithological criteria, the Wawa-Quetico boundary in the Manitouwadge area is transitional. New mapping shows that migmatitic metasedimentary rocks can be traced as semicontinuous enclaves from the Quetico subprovince, through a series of map-scale folds, to the Manitouwadge belt in the Wawa subprovince. Metagreywackes in the Manitouwadge belt are indistinguishable from those in the Quetico subprovince, except for the higher metamorphic grade and migmitization of the latter. U-Pb zircon provenance study of Manitouwadge metagreywackes places a maximum age limit on deposition of 2693 Ma, at least 25 Ma younger than felsic metavolcanic rocks associated with base metal mineralization.
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