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TitleOffshore bedrock geology of Eclipse Sound and Pond Inlet: connecting the structure and stratigraphy of Bylot and northern Baffin islands
 
AuthorCurrie, L DORCID logo; Brent, T A; Turner, E C
SourceCanadian Journal of Earth Sciences vol. 57, no. 10, 2020 p. 1254-1267, https://doi.org/10.1139/cjes-2019-0159 Open Access logo Open Access
Image
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20210388
PublisherCanadian Science Publishing
Documentserial
Lang.English
Mediapaper; digital; on-line
RelatedNRCan photo(s) in this publication
File formatpdf; html
ProvinceNunavut; Northern offshore region
NTS38A/05; 38A/12; 38B/05; 38B/06; 38B/07; 38B/08; 38B/09; 38B/10; 38B/11; 38B/12; 38B/13; 38B/14; 38B/15; 38B/16; 38C; 48A/07; 48A/08; 48A/09; 48A/10; 48A/15; 48A/16; 48D/01; 48D/02; 48D/07; 48D/08; 48D/09; 48D/10
AreaEclipse Sound; Pond Inlet; Baffin Island; Bylot Island; Baffin Bay; Navy Board Inlet
Lat/Long WENS -82.0000 -75.0000 74.0000 72.2500
Subjectsmarine geology; regional geology; structural geology; stratigraphy; geophysics; surficial geology/geomorphology; Science and Technology; Nature and Environment; geological history; faulting; displacement; plate motions; bedrock geology; basement geology; structural features; faults; faults; grabens; horsts; folds; geophysical interpretations; seismic interpretations; magnetic interpretations; aeromagnetic interpretation; magnetic anomalies; geophysical surveys; acoustic surveys, marine; side-scan sonar; bathymetry; structural interpretations; stratigraphic analyses; stratigraphic correlations; physiography; Archean; Borden Basin; Bylot Supergroup; Eclipse Trough; Cape Hay Fault Zone; Mesoproterozoic; Paleoproterozoic; Rae Province; Aktineq Fault Zone; Hartz Mountain Fault Zone; North Bylot Trough; Sermilik Fault; White Bay Fault Zone; Central Bylot High; Phanerozoic; Cenozoic; Quaternary; Tertiary; Mesozoic; Cretaceous; Paleozoic; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; correlation charts; photographs; cross-sections; seismic profiles; tables; aerial photographs
ProgramGEM2: Geo-mapping for Energy and Minerals Cretaceous Stratigrphy
Released2020 02 25
AbstractUnderstanding the Mesoproterozoic and younger structural history of the Eclipse Sound/Pond Inlet area is essential for the interpretation of its Archean to Paleoproterozoic geological history and could have important implications for mineral and petroleum exploration models in the northern Baffin Bay area. The identification of potentially active faults is critical for understanding possible earthquake-related hazards in the area. The integrated interpretation of 1970s-vintage marine seismic data with hill-shaded bathymetry, aeromagnetic data, and onshore geology maps has facilitated the identification of probable Mesoproterozoic (Bylot Supergroup) to Holocene strata on and below the sea floor and a suite of episodically reactivated northwest-striking horst- and graben-bounding normal faults and fault zones. Fault displacement likely occurred during the development of the Mesoproterozoic Borden basin and the Cretaceous-Paleogene opening of Baffin Bay, and in some cases may continue today. Some faults become more west-trending toward the south, which requires parts of these faults to have intermittently accommodated transtensional and (or) transpressional motion, possibly explaining local folds and out-of-graben thrusting. Numerous previously unrecognised faults have been documented, with faults beneath Eclipse Sound (Eclipse Trough) spaced at 5 to 7 km intervals, and at least one fault zone (Cape Hay Fault Zone) that appears to be at least 250 km in length, suggesting faults of similar spacing and scale may be present under Baffin Bay. This study uses a multi-thematic office-based methodology that inexpensively, and with little environmental impact, facilitates the mapping of structures that intersect the sea floor in areas where glaciers have exposed bedrock.
Summary(Plain Language Summary, not published)
Understanding the structural history of the Eclipse Sound/Pond Inlet area could have important implications for mineral and petroleum exploration models in the northern Baffin Bay area. The identification of potentially active faults is critical for understanding possible earthquake-related hazards in the area. The integrated interpretation of 1970s vintage marine seismic data with bathymetry, aeromagnetic, and onshore geology maps has facilitated the identification of previously unrecognised faults, with faults beneath Eclipse Sound spaced at 5 to 7 km. At least one fault zone is 250 km long, suggesting faults of similar density and scale may be present under Baffin Bay. This study illustrates a multi-thematic office-based methodology that inexpensively, and with little environmental impact, facilitates the mapping of structures that intersect the seafloor in areas where glaciers have exposed bedrock.
GEOSCAN ID329234

 
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