Proterozoic to Cretaceous evolution of the western and central Pearya Terrane (Canadian High Arctic)

Estrada, Solveig; Mende, Katja; Gerdes, Axel; Gärtner, Andreas; Hofmann, Mandy; Spiegel, Cornelia; Damaske, Detlef; Koglin, Nikola

doi:10.1016/j.jog.2018.05.010

Cited by 40 publications

(25 citation statements)

References 113 publications

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“…Net cooling during this period was approximately 80 °C, equivalent to ~3 to 4 km of net exhumation. Summing up, our models suggest net exhumation of 8 to 11 km for the Eurekan and post‐Eurekan stages, in agreement with field observations that deformation is predominantly brittle and that no significant metamorphism was associated with the Eurekan orogeny, and also in agreement with previous geochronological data from Pearya, which show that the 40 Ar/ 39 Ar system particularly in biotite was disturbed by the post‐Ellesmerian evolution, but did not experience a full resetting in response to Eurekan tectonics (Estrada et al, ).…”

Section: Results and Interpretationsupporting

confidence: 91%

“…Succession I is dominated by middle‐late Precambrian granitoid orthogneisses with intercalated amphibolites. Successions II and III mainly consist of metamorphosed early‐middle Paleozoic sedimentary and igneous rocks (Estrada et al, ; Trettin, ), whereas the slightly younger, middle Paleozoic sediments of Succession IV are practically unmetamorphosed. So far, no low‐temperature thermochronology data have been published from Pearya.…”

Section: Geological Settingmentioning

confidence: 99%

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Exhuming the Top End of North America: Episodic Evolution of the Eurekan Belt and Its Potential Relationships to North Atlantic Plate Tectonics and Arctic Climate Change

et al. 2019

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Section: Results and Interpretationsupporting

confidence: 91%

Section: Geological Settingmentioning

confidence: 99%

Exhuming the Top End of North America: Episodic Evolution of the Eurekan Belt and Its Potential Relationships to North Atlantic Plate Tectonics and Arctic Climate Change

et al. 2019

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“…Grenville-aged detritus is interpreted to have been reworked from continental-scale clastic wedges that accumulated across western Laurentia during the Neoproterozoic (Rainbird et al, 2012). There are other potential sources of the same age range, such as the 1000-950 Ma orthogneiss units and their sedimentary derivatives in the Canadian Arctic (Estrada et al, 2018).…”

Section: Research Papermentioning

confidence: 99%

Detrital zircon geochronology and Hf isotope geochemistry of Mesozoic sedimentary basins in south-central Alaska: Insights into regional sediment transport, basin development, and tectonics along the NW Cordilleran margin

2020

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The Jurassic–Cretaceous Nutzotin, Wrangell Mountains, and Wellesly basins provide an archive of subduction and collisional processes along the southern Alaska convergent margin. This study presents U-Pb ages from each of the three basins, and Hf isotope compositions of detrital zircons from the Nutzotin and Wellesly basins. U-Pb detrital zircon ages from the Upper Jurassic–Lower Cretaceous Nutzotin Mountains sequence in the Nutzotin basin have unimodal populations between 155 and 133 Ma and primarily juvenile Hf isotope compositions. Detrital zircon ages from the Wrangell Mountains basin document unimodal peak ages between 159 and 152 Ma in Upper Jurassic–Lower Cretaceous strata and multimodal peak ages between 196 and 76 Ma for Upper Cretaceous strata. Detrital zircon ages from the Wellesly basin display multimodal peak ages between 216 and 124 Ma and juvenile to evolved Hf compositions. Detrital zircon data from the Wellesly basin are inconsistent with a previous interpretation that suggested the Wellesly and Nutzotin basins are proximal-to-distal equivalents. Our results suggest that Wellesly basin strata are more akin to the Kahiltna basin, which requires that these basins may have been offset ~380 km along the Denali fault. Our findings from the Wrangell Mountains and Nutzotin basins are consistent with previous stratigraphic interpretations that suggest the two basins formed as a connected retroarc basin system. Integration of our data with previously published data documents a strong provenance and temporal link between depocenters along the southern Alaska convergent margin. Results of our study also have implications for the ongoing discussion concerning the polarity of subduction along the Mesozoic margin of western North America.

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“…Embry (1993) proposed the existence of Crockerland, an uplifted source terrane that fed large volumes of siliciclastic material to the Sverdrup Basin in the west, and also to Svalbard and the adjoining Barents Sea to the east. If Crockerland ever existed as a sediment source area, it is fragmented and intruded by igneous rocks to the extent that today it is masked from identification in seismic data (Anfinson et al 2012;Estrada et al 2018). A source area such as Crockerland north of the present-day Sverdrup Basin, Arctic Canada, may account for the sediment volumes that were delivered to the Boreal Basin during Early Cretaceous time.…”

Section: Palaeotectonic Boreal Basin Configuration High Arctic Largementioning

confidence: 99%

Lower Cretaceous Barents Sea strata: epicontinental basin configuration, timing, correlation and depositional dynamics

Midtkandal

Faleide

et al. 2019

Geol. Mag.

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A comprehensive dataset is collated in a study on sediment transport, timing and basin physiography during the Early Cretaceous Period in the Boreal Basin (Barents Sea), one of the world’s largest and longest active epicontinental basins. Long-wavelength tectonic tilt related to the Early Cretaceous High Arctic Large Igneous Province (HALIP) set up a fluvial system that developed from a sediment source area in the NW, which flowed SE across the Svalbard archipelago, terminating in a low-accommodation shallow sea within the Bjarmeland Platform area of the present-day Barents Sea. The basin deepened to the SE with a ramp-like basin floor with gentle dip. Seismic data show sedimentary lobes with internal clinoform geometry that advanced from the NW. These lobes interfingered with, and were overlain by, another younger depositional system with similar lobes sourced from the NE. The integrated data allow mapping of architectural patterns that provide information on basin physiography and control factors on source-to-sink transport and depositional patterns within the giant epicontinental basin. The results highlight how low-gradient, low-accommodation sediment transport and deposition has taken place along proximal to distal profiles for several hundred kilometres, in response to subtle changes in base level and by intra-basinal highs and troughs. Long-distance correlation along depositional dip is therefore possible, but should be treated with caution to avoid misidentification of timelines for diachronous surfaces.

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Proterozoic to Cretaceous evolution of the western and central Pearya Terrane (Canadian High Arctic)

Cited by 40 publications

References 113 publications

Exhuming the Top End of North America: Episodic Evolution of the Eurekan Belt and Its Potential Relationships to North Atlantic Plate Tectonics and Arctic Climate Change

Exhuming the Top End of North America: Episodic Evolution of the Eurekan Belt and Its Potential Relationships to North Atlantic Plate Tectonics and Arctic Climate Change

Detrital zircon geochronology and Hf isotope geochemistry of Mesozoic sedimentary basins in south-central Alaska: Insights into regional sediment transport, basin development, and tectonics along the NW Cordilleran margin

Lower Cretaceous Barents Sea strata: epicontinental basin configuration, timing, correlation and depositional dynamics

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