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TitleSilurian flysch successions of Ellesmere Island, Arctic Canada, and their significance to northern Caledonian palaeogeography and tectonics
AuthorBeranek, L P; Pease, V; Hadlari, T; Dewing, K
SourceJournal of the Geological Society vol. 172, 2015 p. 201-212, https://doi.org/10.1144/jgs2014-027
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20140233
PublisherGeological Society of London
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceNunavut
NTS39G/09; 39G/10; 39G/11; 39G/12; 39G/13; 39G/14; 39G/15; 39G/16; 49G/09; 49G/10; 49G/11; 49G/12; 49G/13; 49G/14; 49G/15; 49G/16; 49H/09; 49H/10; 49H/11; 49H/12; 49H/13; 49H/14; 49H/15; 49H/16; 59H/09; 59H/10; 59H/11; 59H/12; 59H/13; 59H/14; 59H/15; 59H/16; 120C; 120D/03; 120D/04; 120D/05; 120D/06; 120D/11; 120D/12; 120D/13; 120D/14; 120E/03; 120E/04; 120E/05; 120E/06; 120E/11; 120E/12; 120E/13; 120E/14; 120F; 120G; 120H/03; 120H/04; 120H/05; 120H/06; 120H/11; 120H/12; 120H/13; 120H/14; 340A/03; 340A/04; 340A/05; 340A/06; 340A/11; 340A/12; 340A/13; 340A/14; 340B; 340C; 340D; 340E; 340F; 340H/01; 340H/02; 340H/03; 340H/04; 560A/01; 560A/02; 560A/07; 560A/08; 560A/09; 560A/10; 560A/15; 560A/16; 560D/01; 560D/02; 560D/07; 560D/08; 560D/09; 560D/10; 560D/15; 560D/16; 560E/01
AreaEllesmere Island
Lat/Long WENS -92.0000 -60.0000 83.2500 79.5000
Subjectsgeochronology; tectonics; structural geology; uranium lead dates; uranium lead dating; flysch; zircon; zircon dates; tectonic history; tectonic interpretations; plate tectonics; sedimentary basins; flysch basins; orogenies; fold structures; folds; sedimentary petrology; Paleozoic; Silurian
Illustrationslocation maps; geologic maps; graphs; cross-sections, stratigraphic; sketch maps
ProgramWestern Arctic, High Arctic LIP, GEM2: Geo-mapping for Energy and Minerals
AbstractDetrital zircon provenance studies of Silurian flysch units that underlie the Hazen and Clements Markham fold belts of Ellesmere Island, Arctic Canada, were conducted to evaluate models for northern Caledonian palaeogeography and tectonics. Llandovery flysch was deposited along an active plate margin and yields detrital zircons that require northern derivation from the adjacent Pearya terrane. If Pearya originated near Svalbard and NE Greenland, it was transported by strike-slip faults to Ellesmere Island by the Early Silurian. Wenlock to Ludlow turbidites yield Palaeozoic-Archaean detrital zircons with dominant age-groupings c. 650, 970, 1150, 1450 and 1650 Ma. These turbidite systems did not fill a flexural foreland basin in front of the East Greenland Caledonides, but rather an east-west-trending trough that was probably related to sinistral strike-slip faulting along the northern Laurentian margin. The data support provenance connections with the Svalbard Caledonides, especially Baltican-affinity rocks of SW Spitsbergen that were proximal to NE Greenland during the Baltica-Laurentia collision. Pridoli flysch has sources that include Pearya, the East Greenland Caledonides and the Canadian Shield. Devonian-Carboniferous molasse in Arctic Canada has analogous detrital zircon signatures, which implies recycling of Silurian flysch during mid-Palaeozoic (Ellesmerian) collisional tectonism or that some collisional blocks were of similar Baltican-Laurentian crustal affinities.
Summary(Plain Language Summary, not published)
This manuscript follows up on a paper published by Drs. Hadlari and Dewing on the origin of Pearya Terrane from the northern tip of Ellesmere Island. Detrital zircons extracted from sandstone and volcaniclastic deposits were dated using U-Pb geochronology. The ages show that the volcanic arc and North American rocks were connected at least as far back as 430 Ma, as predicted by recent GSC research under GEM-1.
GEOSCAN ID295269