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TitleStratigraphy, structure, and petrology of a representative klippe of the Bravo Lake Formation, Piling Group, central Baffin Island, Nunavut
AuthorStacey, J R; Pattison, D R M
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C13, 2003, 11 pages, (Open Access)
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
AreaBaffin Island; Bravo Lake
Lat/Long WENS-72.2333 -72.2167 68.5167 68.5000
Subjectsregional geology; stratigraphy; structural geology; petrography; structural features; deformation; metamorphism; stratigraphic analyses; mineral potential; metasedimentary rocks; Bravo Lake Formation; Piling Group; Foxe Fold Belt; klippe; Precambrian; Proterozoic; Paleozoic
Illustrationssketch maps; cross-sections; photographs; graphs
Released2003 03 14
AbstractThe stratigraphy, structure, metamorphism, and mineral-deposit potential of a prospective type area for the Paleoproterozoic Bravo Lake Formation has been characterized in a well exposed klippe. The klippe is in thrust contact with underlying metaturbidite of the Longstaff Bluff Formation. The Bravo Lake Formation overlies a rusty, strongly sheared metasedimentary basal unit immediately above the
thrust contact. The formation in the klippe comprises a lower volcanic unit, pillow basalt, siliciclastic and chemical metasedimentary rocks intruded by ultramafic sills, an upper volcanic unit, and an upper metasedimentary unit containing laminated sulphide pods. Exposures east of the klippe preserve a higher volcanic unit not seen in the klippe. Peak metamorphism (approximately 650°C, 3.0-4.0 kbar) postdates major fabric-forming deformation events. Ultramafic rocks in the klippe could potentially host magmatic sulphide deposits,
and some metasedimentary rocks could potentially host exhalative sulphide deposits.