Sökning: WFRF:(Olesen Arne Vestergaard)
> (2013) >
New aero-gravity re...
New aero-gravity results from the Arctic : Linking the latest Cretaceous-early Cenozoic plate kinematics of the North Atlantic and Arctic Ocean
-
- Døssing, Arne (författare)
- DTU Space, National Space Institute, Technical University of Denmark
-
- Hopper, John R. (författare)
- Geological Survey of Denmark and Greenland (GEUS), Copenhagen
-
- Olesen, Arne Vestergaard (författare)
- DTU Space, National Space Institute, Technical University of Denmark
-
visa fler...
-
- Rasmussen, Thorkild Maack (författare)
- Geological Survey of Denmark and Greenland (GEUS), Copenhagen
-
- Halpenny, John F. (författare)
- Natural Resources Canada, Ottawa, ON
-
visa färre...
-
(creator_code:org_t)
- 2013-10-02
- 2013
- Engelska.
-
Ingår i: Geochemistry Geophysics Geosystems. - : American Geophysical Union (AGU). - 1525-2027. ; 14:10, s. 4044-4065
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The tectonic history of the Arctic Ocean remains poorly resolved and highly controversial. Details regarding break up of the Lomonosov Ridge from the Barents-Kara shelf margins and the establishment of seafloor spreading in the Cenozoic Eurasia Basin are unresolved. Significantly, the plate tectonic evolution of the Mesozoic Amerasia Basin is essentially unknown. The Arctic Ocean north of Greenland is at a critical juncture that formed at the locus of a Mesozoic three-plate setting between the Lomonosov Ridge, Greenland, and North America. In addition, the area is close to the European plate, resulting in complicated interactions between all these areas that are difficult to resolve. In 2009, the 550,000 km2 LOMGRAV aero-geophysical survey produced the first collocated gravity and magnetic measurements over the area, significantly increasing the data coverage. We present an interpretation of a new free-air gravity compilation, which reveals a regionally consistent structural grain across the Lomonosov Ridge, the Ellesmere and Lincoln Sea shelves, and the Alpha Ridge. We interpret the grain as evidence of latest Cretaceous (∼80 Ma) regional extension in response to the northward propagation of Atlantic and Labrador Sea opening into the Arctic, west of Greenland. This interpretation is consistent with coincident alkaline volcanic activity evident in the borderlands of the Lincoln Sea. We further suggest that Eurekan crustal shortening contributed to the formation of the distinct Lomonosov Ridge plateau against an important fault zone north of Greenland. Our results provide new constraints for Cretaceous-Cenozoic plate reconstructions of the Arctic. Key Points Presentation of the largest aero-gravity survey acquired over the Arctic Ocean Plate tectonic link between Atlantic and Arctic spreading west of Greenland New plate reconstruction models are presented for the area north of Greenland
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Nyckelord
- Prospekteringsgeofysik
- Exploration Geophysics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas