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TitleThompson Nickel-Belt-type units in the northeastern Kisseynew Domain, Manitoba (parts of NTS 63O)
AuthorZwanzig, H V; Murphy, L; Percival, J A; Whalen, J B; Rayner, NORCID logo
SourceManitoba Science, Technology, Energy and Mines, Manitoba Geological Survey, Report of Activities 2006, 2006 p. 85-103 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20060317
Mediapaper; CD-ROM
File formatpdf
AreaKisseynew Domain
Lat/Long WENS-100.0000 -98.0000 56.0000 55.0000
Subjectsgeochemistry; general geology; igneous and metamorphic petrology; metallic minerals; orthogneisses; neodymium; neodymium geochemistry; biotite; Archean; granulites; paragneisses; quartzites; migmatites; zircon; magmatic arcs; aeromagnetic surveys; orogenies; orogenesis
Illustrationslocation maps; geological sketch maps; cross-sections, stratigraphic; photographs; tables; geochemical plots; bar graphs
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010 Targeted Geoscience Initiative (TGI 3)
Released2006 01 01
AbstractRemapping a corridor from the Thompson Nickel Belt (TNB) 60 km west to Threepoint Lake (south of Nelson House) and a preliminary interpretation of geochemistry and Nd isotope data provide new evidence for an Archean age of crystallization and/or mantle extraction of biotite granulite facies orthogneiss in the northeastern part of the Kisseynew Domain. The gneiss occurs in local structural culminations mantled by, and probably interleaved with, heterogeneous paragneiss that may overlie it unconformably. A composite stratigraphic section through the narrow belts of this paragneiss comprises basal quartzite (containing only Archean detrital zircons) and minor calcsilicate gneiss, overlain by garnet-biotite gneiss and aeromagnetically prominent sulphide-facies iron formation. The succession has distinct similarities to the lower half of the cover rocks (Ospwagan Group) on the Archean basement in the TNB, but also some problematic differences. These narrow units are in fault contact with widespread juvenile Paleoproterozoic migmatite (Burntwood Group) derived from volcanic-arc sedimentary rocks. A preliminary interpretation suggests that a large region, which seems to be structurally underlain by these rocks, may be a major exploration frontier for Thompsontype nickel deposits. This assumes that the correlation of these rocks with the Ospwagan Group is confirmed by more rigorous examination, including planned analytical work and further mapping.

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