| Title | Rifting and evolution of the Labrador-Baffin Seaway |
| Download | Downloads |
| Associated Data | https://doi.org/10.4095/330200 |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Keen, C E; Dickie, K; Dafoe, L T ; Funck, T; Welford, J K; Dehler, S A;
Gregersen, U; DesRoches, K J |
| Source | Geological synthesis of Baffin Island (Nunavut) and the Labrador-Baffin Seaway; by Dafoe, L T (ed.); Bingham-Koslowski, N (ed.); Geological Survey of Canada, Bulletin 608, 2022 p. 341-377, https://doi.org/10.4095/321854
 Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Geological synthesis of
Baffin Island (Nunavut) and the Labrador-Baffin Seaway |
| File format | pdf; html |
| Province | Nunavut; Newfoundland and Labrador; Northern offshore region |
| NTS | 3; 14; 15; 16; 23I; 23O; 23P; 25A; 25G; 25H; 25I; 25J; 25K; 25L; 25M; 25N; 25O; 25P; 26; 27; 28; 29A; 29B; 29C; 29D; 35P; 36A; 36B; 36C; 36D; 36E; 36F; 36G; 36H; 36I; 36P; 37; 38; 39A; 39B; 39C; 39D; 47E;
47F; 47G; 47H; 48A; 48B; 48C; 48D; 48E; 57E; 57H; 58A; 58D |
| Area | Baffin Island; Baffin Bay; Bylot Island; Davis Strait; Labrador; Labrador Sea; Canada; Greenland; Denmark |
| Lat/Long WENS | -90.5000 -43.0000 78.0000 52.0000 |
| Subjects | regional geology; structural geology; tectonics; geophysics; Science and Technology; Nature and Environment; geological history; basin evolution; tectonic evolution; tectonic history; tectonic elements;
plate margins; rifts; rifting; faulting; sea floor spreading; volcanism; magmatism; magmas; subsidence; deformation; plate motions; crustal structure; crustal thickness; Mohorovicic discontinuity; continental crust; oceanic crust; mantle; craton;
terranes; paleogeography; stress patterns; sedimentary basins; geophysical surveys; geophysical interpretations; seismic interpretations; seismic reflection surveys; seismic refraction surveys; magnetic interpretations; magnetic anomalies; gravity
interpretations; gravity anomalies; satellite geodesy; geophysical logging; exploration wells; core samples; bedrock geology; basement geology; lithology; sedimentary rocks; sandstones; shales; mudstones; carbonates; igneous rocks; volcanic rocks;
basalts; structural features; fault zones; faults; grabens; fracture zones; subsidence; intrusions; sills; deformation; unconformities; submarine features; serpentinization; Paleogene; Paleocene; Eocene; Baffin Island Margin; Labrador Margin; West
Greenland Margin; North American Craton; Greenland Plate; GRAV3D; Ungava Fault Zone; Cumberland Basin; Nuuk Basin; Nuussuaq Basin; Melville Bay Graben; Hopedale Basin; Labrador Se Basin; Paamiut South Basin; Saglek Basin; Fylla Structural Complex;
Gjoa High; Lady Franklin Basin; North Ungava Basin; Ikermiut Basin; Sisimuit Basin; Davis Strait High; Saglek Formation; Mokami Formation; Kenamu Formation; Cartwright Formation; Gudrid Formation; Markland Formation; Bjarni Formation; Alexis
Formation; Ataneq Formation; Manîtsoq Formation; Kangâmiut Formation; Nukik Formation; Ikermut Formation; West Greenland Basalt Group; Appat-Kitsissut Clastics; Baffin Basin; Upemavik Basin; Kivioq Ridge; Melville Bay Ridge; Scott Graben; Kap York
Basin; Baffin Fan; Buchan Graben; Kivioq Basin; Lady Ann Basin; Bower Fracture Zone; Cartwright Arch; Cartwright Fracture Zone; Hudson Fracture Zone; Hecla High; Lady Franklin Arch; Maniitsoq High; Okak Arch; Snorri Fracture Zone; Inglefield Mobile
Belt; Makkovik Orogen; Data processing; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous |
| Illustrations | location maps; geoscientific sketch maps; plots; cross-sections; tables |
| Program | GEM2: Geo-mapping for Energy and Minerals Baffin Region Atlas |
| Released | 2022 08 15 |
| Abstract | The evolution of the 2000 km long Mesozoic rift system underlying the Labrador-Baffin Seaway is described, with emphasis on results from geophysical data sets, which provide the timing, sediment
thickness, and crustal structure of the system. The data sets include seismic reflection and refraction, gravity, and magnetic data, with additional constraints provided by near-surface geology and well data. Many features that characterize rift
systems globally are displayed, including: wide and narrow rift zones; magma-rich and magma-poor margin segments; exhumation of continental mantle in distal, magma-poor zones; and occurrences of thick basalts, associated with the development of
seaward-dipping reflectors, and magmatic underplating. The magma-rich regions were affected by Paleogene volcanism, perhaps associated with a hotspot or plume. Plate reconstructions help elucidate the plate tectonic history and modes of rifting in
the region; however, many questions remain unanswered with respect to this rift system. |
| Summary | (Plain Language Summary, not published)
We describe the evolution of the 2000-km-long Mesozoic rift system underlying the Labrador-Baffin Seaway, emphasizing results from the geophysical data
sets, which provide the timing, sediment thickness and crustal structure of the system. The datasets include seismic reflection and refraction, gravity and magnetic data, with the additional constraints of near surface geology and well data. A wide
variety of features are displayed which characterize rift systems globally, including: wide and narrow rift zones; magma-rich and magma-poor segments; exhumation of continental mantle in distal, magma-poor zones; occurrences of thick basalts, the
development of seaward dipping reflections, and magmatic underplating where the rift is affected by Paleogene volcanism, perhaps associated with a hotspot or plume. Plate reconstructions elucidate the plate tectonic history and modes of rifting in
the region. Why the rift initiated in presumed strong, thick cratonic lithosphere remains an outstanding question. |
| GEOSCAN ID | 321854 |
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