Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism
The High Arctic has been a complex region of collisional and extensional tectonism through the Mesozoic and Cenozoic. Svalbard, the sub-aerial exposure of the northwestern Barents Shelf, is an excellent natural laboratory investigating for High Arctic tectonism. Using apatite and zircon (U-Th)/He lo...
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Université d'Ottawa / University of Ottawa
2016
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Online Access: | https://dx.doi.org/10.20381/ruor-263 http://www.ruor.uottawa.ca/handle/10393/35305 |
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ftdatacite:10.20381/ruor-263 2023-05-15T14:48:13+02:00 Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism Barnes, Christopher 2016 https://dx.doi.org/10.20381/ruor-263 http://www.ruor.uottawa.ca/handle/10393/35305 en eng Université d'Ottawa / University of Ottawa U-Th/He thermochronology Southwestern Province West Spitsbergen Fold-and-Thrust Belt Wandel Hav Mobile Belt Text Thesis article-journal ScholarlyArticle 2016 ftdatacite https://doi.org/10.20381/ruor-263 2021-11-05T12:55:41Z The High Arctic has been a complex region of collisional and extensional tectonism through the Mesozoic and Cenozoic. Svalbard, the sub-aerial exposure of the northwestern Barents Shelf, is an excellent natural laboratory investigating for High Arctic tectonism. Using apatite and zircon (U-Th)/He low-temperature thermochronometry combined with geological constraints, we resolve Cretaceous through Paleogene time-temperature histories for four regions of the Southwestern Province. Our results indicate a temperature gradient from south to north of ~185°C to >200°C, respectively, as a consequence of sedimentary burial and elevated geothermal gradient ( 45°C/km) from High Arctic Large Igneous Province activity. Late Cretaceous cooling affected all regions during regional exhumation related to initial rifting in the Eurasian Basin. During Eurekan tectonism: 1) our models indicate a heating event (55-47 Ma) characterized by overthrusting and a lack of erosion of the West Spitsbergen Fold-and-Thrust Belt, with Central Basin sediments derived from northern Greenland, followed by 2) a subsequent cooling event (47-34 Ma) corresponding to a shift in tectonic regime from compression to dextral strike-slip kinematics; exhumation of the WSFTB coincided with strikeslip tectonics. Thesis Arctic Greenland Svalbard Wandel hav Spitsbergen DataCite Metadata Store (German National Library of Science and Technology) Arctic Svalbard Greenland Wandel ENVELOPE(-64.000,-64.000,-65.083,-65.083) Wandel Hav ENVELOPE(-17.000,-17.000,82.250,82.250) Central Basin ENVELOPE(43.000,43.000,73.500,73.500) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
U-Th/He thermochronology Southwestern Province West Spitsbergen Fold-and-Thrust Belt Wandel Hav Mobile Belt |
spellingShingle |
U-Th/He thermochronology Southwestern Province West Spitsbergen Fold-and-Thrust Belt Wandel Hav Mobile Belt Barnes, Christopher Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
topic_facet |
U-Th/He thermochronology Southwestern Province West Spitsbergen Fold-and-Thrust Belt Wandel Hav Mobile Belt |
description |
The High Arctic has been a complex region of collisional and extensional tectonism through the Mesozoic and Cenozoic. Svalbard, the sub-aerial exposure of the northwestern Barents Shelf, is an excellent natural laboratory investigating for High Arctic tectonism. Using apatite and zircon (U-Th)/He low-temperature thermochronometry combined with geological constraints, we resolve Cretaceous through Paleogene time-temperature histories for four regions of the Southwestern Province. Our results indicate a temperature gradient from south to north of ~185°C to >200°C, respectively, as a consequence of sedimentary burial and elevated geothermal gradient ( 45°C/km) from High Arctic Large Igneous Province activity. Late Cretaceous cooling affected all regions during regional exhumation related to initial rifting in the Eurasian Basin. During Eurekan tectonism: 1) our models indicate a heating event (55-47 Ma) characterized by overthrusting and a lack of erosion of the West Spitsbergen Fold-and-Thrust Belt, with Central Basin sediments derived from northern Greenland, followed by 2) a subsequent cooling event (47-34 Ma) corresponding to a shift in tectonic regime from compression to dextral strike-slip kinematics; exhumation of the WSFTB coincided with strikeslip tectonics. |
format |
Thesis |
author |
Barnes, Christopher |
author_facet |
Barnes, Christopher |
author_sort |
Barnes, Christopher |
title |
Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
title_short |
Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
title_full |
Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
title_fullStr |
Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
title_full_unstemmed |
Cretaceous-Paleogene Low Temperature History of the Southwestern Province, Svalbard, Revealed by (U-Th)/He Thermochronometry: Implications for High Arctic Tectonism |
title_sort |
cretaceous-paleogene low temperature history of the southwestern province, svalbard, revealed by (u-th)/he thermochronometry: implications for high arctic tectonism |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2016 |
url |
https://dx.doi.org/10.20381/ruor-263 http://www.ruor.uottawa.ca/handle/10393/35305 |
long_lat |
ENVELOPE(-64.000,-64.000,-65.083,-65.083) ENVELOPE(-17.000,-17.000,82.250,82.250) ENVELOPE(43.000,43.000,73.500,73.500) |
geographic |
Arctic Svalbard Greenland Wandel Wandel Hav Central Basin |
geographic_facet |
Arctic Svalbard Greenland Wandel Wandel Hav Central Basin |
genre |
Arctic Greenland Svalbard Wandel hav Spitsbergen |
genre_facet |
Arctic Greenland Svalbard Wandel hav Spitsbergen |
op_doi |
https://doi.org/10.20381/ruor-263 |
_version_ |
1766319313342431232 |