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TitleA qualitative comparison of continental rift structures in the sedimentary basins of the Labrador Shelf, offshore Newfoundland and Labrador, and the Malawi Rift, east Africa
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMcCartney, TORCID logo
SourceGeological Survey of Canada, Open File 8634, 2019, 3 sheets, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
ProvinceNewfoundland and Labrador; Eastern offshore region
NTS3; 13; 14
AreaLabrador; Lake Malawi; Canada; Malawi
Lat/Long WENS -62.2500 -53.5000 59.7500 52.6667
Lat/Long WENS 33.5000 35.5000 -9.5000 -14.5000
Subjectsmarine geology; structural geology; stratigraphy; geophysics; geochronology; Science and Technology; Nature and Environment; continental margins; continental shelf; sedimentary basins; geological history; tectonic history; rifts; rifting; deformation; basin evolution; volcanism; crustal uplift; depositional history; sediment dispersal; sediment transport; provenance; bedrock geology; basement geology; structural features; grabens; faults; lithology; sedimentary rocks; sandstones; conglomerates; mudstones; siltstones; igneous rocks; volcanic rocks; structural analyses; structural interpretations; seismic data; seismic interpretations; seismic reflection surveys; basin geometry; lithofacies; exploration wells; radiometric dates; zircon dates; Labrador Shelf; Malawi Rift; Western Branch of the East African Rift System; Hopedale Basin; Saglek Basin; Okak Arch; South Hopedale Basin; Labrador Trough; Cartwright Arch; Grenville Province; Makkovik Province; Nain Province; Hopedale Block; Saglek Block; Alexis Volcanics; Rungwe Volcanic Province; Skolp E-07 Well; Ogmund E-72 Well; Snorri J-90 Well; Karlsefni A-13 Well; Kaipokok Bay Shear. Zone; Kanairiktok Shear Zone; Phanerozoic; Mesozoic; Cretaceous
Illustrationslocation maps; geoscientific sketch maps; schematic representations; cross-sections
ProgramGEM2: Geo-mapping for Energy and Minerals Baffin Region Atlas
Released2019 10 15
Summary(Plain Language Summary, not published)
The Labrador Sea formed as the result of rifting between North America and Greenland. The initial stage of this rifting was continental rifting, and it took place during the Mesozoic. Lake Malawi is part of the East African Rift System, an continental rift that has persisted for the last half of the Cenozoic. This series of three posters compares faults mapped in the subsurface of the Labrador Shelf with faults mapped in the subsurface of Lake Malawi. The tectonic processes that initiated the faults in both locations are similar. Poster 1 serves as an introduction to the poster series. Poster 2 discusses the similarity between extensional (i.e. rift-related) structures in the South Hopedale Basin and the Central Basin of Lake Malawi. Poster 3 discusses the Hopedale Basin volcanic distribution and the structures associated with the Okak Arch.

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