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Verfasst von:Vamvaka, Agni [VerfasserIn]   i
 Pross, Jörg [VerfasserIn]   i
 Monien, Patrick [VerfasserIn]   i
 Piepjohn, Karsten [VerfasserIn]   i
 Estrada Nuñez, Solveig [VerfasserIn]   i
 Lisker, Frank [VerfasserIn]   i
 Spiegel, Cornelia [VerfasserIn]   i
Titel:Exhuming the top end of North America
Titelzusatz:episodic evolution of the Eurekan Belt and its potential relationships to North Atlantic plate tectonics and arctic climate change
Verf.angabe:Agni Vamvaka, Jörg Pross, Patrick Monien, Karsten Piepjohn, Solveig Estrada, Frank Lisker, and Cornelia Spiegel
E-Jahr:2019
Jahr:06 September 2019
Umfang:22 S.
Teil:volume:38
 year:2019
 number:12
 pages:4207-4228
 extent:22
Fussnoten:Gesehen am 06.02.2020
Titel Quelle:Enthalten in: Tectonics
Ort Quelle:Hoboken, NJ : Wiley, 1982
Jahr Quelle:2019
Band/Heft Quelle:38(2019), 12, Seite 4207-4228
ISSN Quelle:1944-9194
Abstract:We present the first low-temperature thermochronology data from northernmost Ellesmere Island (Canadian Arctic), along with palynological data from Paleogene sediments. Our study area is part of the >2,500-km-long Eurekan deformation belt that formed across the High Arctic during the Eocene. The aim of this study is to investigate the exhumation of the Eurekan belt and potential relationships with the opening of the North Atlantic, as well as with environmental changes of the Arctic. Our data show that the Canadian Arctic margin was characterized by stretching and basin formation during the Paleocene. Sediment deposition occurred in a coastal swamp environment under a warm and humid climate that lasted into the early Eocene. Exhumation of northern Ellesmere Island was episodic and was presumably controlled by strike-slip movements along the De Geer Fracture Zone between Svalbard and Greenland. Enhanced exhumation of northern Ellesmere Island occurred 66-60 Ma, 55-48 Ma, 44-38 Ma, and 34-26 Ma. These exhumation periods largely correlate with changes of spreading rates and movement directions of the Norwegian-Greenland Sea. Main topographic growth along the Eurekan belt was temporally coincident with deposition of ice-rafted debris off eastern Greenland. We suggest that Eurekan topography growth was an important trigger for glacier formation in Greenland. The cessation of rapid exhumation at 26 Ma can be explained by continental separation between Greenland and Svalbard, which decoupled northern Ellesmere Island from strike-slip movements along the De Geer Fracture Zone, eventually leading to the opening of the Fram Strait.
DOI:doi:10.1029/2019TC005621
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1029/2019TC005621
 Volltext: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019TC005621
 DOI: https://doi.org/10.1029/2019TC005621
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:apatite fission track and (U-Th)/He thermochronology
 Canadian High Arctic
 Ellesmere Island
 Eurekan orogeny
 palynology
 Pearya Terrane
K10plus-PPN:1689527072
Verknüpfungen:→ Zeitschrift

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