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TitleProterozoic basins of Canada: Early Proterozoic sequences in Labrador
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AuthorWardle, R J; Bailey, D G
SourceGeological Survey of Canada, Paper 81-10 supplement, 1981, 28 pages, https://doi.org/10.4095/311292
Year1981
PublisherGeological Survey of Canada
MeetingSymposium On Proterozoic Basins Of Canada; Halifax, Nova Scotia; CA; 1982-05
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication supercedes Wardle, R J; Bailey, D G; (1981). Early Proterozoic sequences in Labrador, Proterozoic basins of Canada, Geological Survey of Canada, Paper no. 81-10
RelatedThis publication is related to Campbell, F H A; (1981). Proterozoic basins of Canada, Geological Survey of Canada, Paper no. 81-10
File formatpdf
ProvinceNewfoundland and Labrador
NTS3E; 13E; 13F; 13G; 13H; 13I; 13J; 13K; 13L; 13M; 13N; 13O; 23H; 23H; 23I; 23J; 23O; 23P; 14; 14C; 14D; 14E; 14F; 14L; 14M; 24A; 24B; 24G; 24H; 24I; 24J; 24O; 24P; 25A
AreaLabrador
Lat/Long WENS -68.0000 -54.0000 61.0000 53.0000
Subjectsstructural geology; stratigraphy; tectonics; depositional environment; sedimentary basins; faults; rifting; volcanic rocks; sedimentary environments; Aillik Group; Moran Lake Group; Petscapiskau Group; Lake Harbour Formation; Churchill Province; Makkovik Subprovince; Labrador Trough; Laporte Group; Kaniapiskau Supergroup; Knob Lake Group; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; stratigraphic correlations; cross-sections; ternary diagrams; schematic representations; schematic models
Released1982 03 01; 2018 11 19
AbstractEarly Proterozoic ( Aphebian) sedimentary and volcanic rocks in Labrador are described from two tectonic belts: the Churchill Province of western Labrador, and the Makkovik Subprovince of eastern Labrador. The Aphebian in the Churchill Province is represented mainly by the Labrador Trough ( Kaniapiskau Supergroup) but also in the Laporte Croup, Lake Harbour Formation and Petscapiskau Croup. The Labrador Trough is the most completely exposed of these sequences and displays a transition {rom shelf sedimentation in the west, to deeper water basinal conditions in the east. Rifting along the eastern margin of the Labrador Trough may have produced a narrow proto-oceanic rift during this stage. Aphebian sequences in the Makkovik Subprovince are represented by the Maran Lake and Aillik groups. The Maran Lake and lower Aillik groups were deposited in environments broadly similar to those of the Churchill Province and in approximately the same time. The upper Aillik Group (17 50-1670 Ma) represents a younger assemblage dominated by f elsic volcanics intricately intruded by granites and may indicate the onset of radically diff erent tectonic conditions towards the end of Aphebian time.
GEOSCAN ID311292