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TitleGeology of the Notigi-Wapisu lakes area, Kisseynew Domain, Manitoba (parts of NTS 63O14, 64B3)
AuthorMurphy, L A; Zwanzig, H V; Rayner, N
SourceManitoba Science, Technology, Energy and Mines, Manitoba Geological Survey, Report of Activities 2009, 2009 p. 69-84
Year2009
Alt SeriesEarth Sciences Sector, Contribution Series 20090254
Documentserial
Lang.English
Mediapaper
ProvinceManitoba
NTS63O/14; 64B/03
AreaNotigi Lake; Wapisu Lake
Lat/Long WENS-99.5000 -99.0000 56.2500 55.7500
Subjectsstratigraphy; geochronology; structural geology; bedrock geology; metamorphic rocks; gneisses; metasedimentary rocks; metagreywackes; igneous rocks; monzonites; syenites; structural features; radiometric dates; radiometric dating; uranium lead dating; uranium lead dates; Kisseynew Domain; Burntwook Group; Sickle Group; Granville Lake assemblage; Precambrian; Proterozoic
Illustrationslocation maps; Concordia diagrams; plots; graphs; photomicrographs
ProgramFlin Flon TGI-3, Targeted Geoscience Initiative (TGI-3), 2005-2010
AbstractIn 2009, the Manitoba Geological Survey (MGS) completed a field program undertaken in the Notigi - Wapisu lakes area, located along the north flank of the Kisseynew Domain. Significant structural and stratigraphic details were added to the local Paleoproterozoic metasedimentary rocks and to a thin ortho-amphibolite unit at Notigi Lake. Fieldwork also extended south to include parts of Wapisu Lake, where in 2007, Geological Survey of Canada (GSC) geologists documented metasedimentary rocks of the Wuskwatim Lake sequence similar to the nickel-hosting Ospwagan Group in the Thompson Nickel Belt. This work applied a new method of using the 2008 high-resolution aeromagnetic survey funded by the Geological Survey of Canada to traverse more effectively the burned-over areas surrounding Notigi Lake. This report concentrates on the stratigraphy of the Burntwood and Sickle groups as well as thin structural marker units of mafic to felsic meta-igneous and metasedimentary rocks (including the volcano-sedimentary assemblage, herein called the Granville Lake assemblage and the Black Trout diorite). These units were examined most closely within a structural inlier (herein called the Notigi Lake structure) that mainly exposes various units of the Sickle Group within the widespread metagreywacke and migmatite of the Burntwood Group. The Wuskwatim Lake sequence on Wapisu Lake was re-examined along the margin of a quartz monzonite intrusion whose geochemistry and Nd isotopic composition are evidence for Archean rocks at depth. New U-Pb ages are presented for the Wuskwatim Lake sequence, the quartz monzonite and a younger monzogranite at Notigi Lake. Short discussions in this and the accompanying report (Zwanzig and Murphy, GS-8, this volume) describe the structural geometry and history at Notigi Lake, including its economic implications.
GEOSCAN ID248116