Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence
Detailed low-level aeromagnetic data taken over the Lincoln Sea and surrounding regions are discussed in an attempt to explain the evolution of the area and its relation to the possible movement of North America and Greenland along Nares Strait. A depth-to-source analysis of the data delineates a ma...
Published in: | Meddelelser om Grønland. Geoscience |
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Language: | English |
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The Commission for Scientific Research in Greenland /Danish Polar Center
1982
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Online Access: | https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601 |
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ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/139601 2024-01-28T10:04:16+01:00 Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence Kovacs, Louis C. 1982-06-10 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601/183614 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601 Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 275-290 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 275-290 1600-4590 0106-1046 10.7146/moggeosci.v8i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1982 ftsbaarhusojs https://doi.org/10.7146/moggeosci.v8i 2024-01-03T23:59:20Z Detailed low-level aeromagnetic data taken over the Lincoln Sea and surrounding regions are discussed in an attempt to explain the evolution of the area and its relation to the possible movement of North America and Greenland along Nares Strait. A depth-to-source analysis of the data delineates a major northeastward extension of the Nares Strait extending to the western edge of the Morris Jesup Rise, and identified here as the Arctic Ocean portion of the Wegener Fault or Fracture Zone. Two regions of moderate amplitude, short wavelength anomalies characterized by shallow (< 2 km) magnetic basement are delineated, one to the north of Ellesmere Island and the other to the northwest of the Morris Jesup Rise, as well as a steep escarpment paralleling the Wegener Fault and forming the northwest boundary of a deep, sediment-filled basin. A plate tectonic analysis of these data suggests that the hot spot responsible for the formation of the Morris Jesup Rise-Yermak Plateau in the late Eocene and early Oligocene and the Kap Washington Group volcanics at about the Cretaceous-Tertiary boundary was also active in the late Cretaceous. During this period, prior to any strike-slip movement of Greenland along Nares Strait, a single, Iceland-like volcanic massif was formed north of Greenland and Ellesmere Island contemporaneously with postulated sea-floor spreading in the Makarov Basin. Sinistral movement of North America from Greenland along Nares Strait, and along a second "Ellesmere Fracture Zone" extending northeast through the massif from the edge of the Ellesmere Island shelf then led to the formation in early Tertiary time of a deep sediment-filled basin due to thinning and foundering of the crust northeast of Nares Strait, the emplacement of the western half of the massif between Lomonosov Ridge and Ellesmere Island, and of the eastern half of the massif just west of the Morris Jesup Rise. A shift in the hot spot to the east then led, with the initiation of spreading in the Eurasia Basin, to the later formation of ... Article in Journal/Newspaper Arctic Arctic Ocean Ellesmere Island Greenland Iceland Kap Washington Lincoln Sea Lomonosov Ridge makarov basin Nares strait Yermak plateau Aarhus University: OJS at The State and University Library Arctic Arctic Ocean Ellesmere Island Greenland Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Kap ENVELOPE(23.567,23.567,65.533,65.533) Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Morris Jesup Rise ENVELOPE(-20.000,-20.000,83.750,83.750) Eurasia Basin ENVELOPE(80.000,80.000,87.000,87.000) Kap Washington ENVELOPE(-38.000,-38.000,83.517,83.517) Meddelelser om Grønland. Geoscience 8 |
institution |
Open Polar |
collection |
Aarhus University: OJS at The State and University Library |
op_collection_id |
ftsbaarhusojs |
language |
English |
description |
Detailed low-level aeromagnetic data taken over the Lincoln Sea and surrounding regions are discussed in an attempt to explain the evolution of the area and its relation to the possible movement of North America and Greenland along Nares Strait. A depth-to-source analysis of the data delineates a major northeastward extension of the Nares Strait extending to the western edge of the Morris Jesup Rise, and identified here as the Arctic Ocean portion of the Wegener Fault or Fracture Zone. Two regions of moderate amplitude, short wavelength anomalies characterized by shallow (< 2 km) magnetic basement are delineated, one to the north of Ellesmere Island and the other to the northwest of the Morris Jesup Rise, as well as a steep escarpment paralleling the Wegener Fault and forming the northwest boundary of a deep, sediment-filled basin. A plate tectonic analysis of these data suggests that the hot spot responsible for the formation of the Morris Jesup Rise-Yermak Plateau in the late Eocene and early Oligocene and the Kap Washington Group volcanics at about the Cretaceous-Tertiary boundary was also active in the late Cretaceous. During this period, prior to any strike-slip movement of Greenland along Nares Strait, a single, Iceland-like volcanic massif was formed north of Greenland and Ellesmere Island contemporaneously with postulated sea-floor spreading in the Makarov Basin. Sinistral movement of North America from Greenland along Nares Strait, and along a second "Ellesmere Fracture Zone" extending northeast through the massif from the edge of the Ellesmere Island shelf then led to the formation in early Tertiary time of a deep sediment-filled basin due to thinning and foundering of the crust northeast of Nares Strait, the emplacement of the western half of the massif between Lomonosov Ridge and Ellesmere Island, and of the eastern half of the massif just west of the Morris Jesup Rise. A shift in the hot spot to the east then led, with the initiation of spreading in the Eurasia Basin, to the later formation of ... |
format |
Article in Journal/Newspaper |
author |
Kovacs, Louis C. |
spellingShingle |
Kovacs, Louis C. Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
author_facet |
Kovacs, Louis C. |
author_sort |
Kovacs, Louis C. |
title |
Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
title_short |
Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
title_full |
Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
title_fullStr |
Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
title_full_unstemmed |
Motion along Nares Strait recorded in the Lincoln Sea: aeromagnetic evidence |
title_sort |
motion along nares strait recorded in the lincoln sea: aeromagnetic evidence |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
1982 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(23.567,23.567,65.533,65.533) ENVELOPE(170.000,170.000,87.000,87.000) ENVELOPE(-20.000,-20.000,83.750,83.750) ENVELOPE(80.000,80.000,87.000,87.000) ENVELOPE(-38.000,-38.000,83.517,83.517) |
geographic |
Arctic Arctic Ocean Ellesmere Island Greenland Yermak Plateau Nares Kap Makarov Basin Morris Jesup Rise Eurasia Basin Kap Washington |
geographic_facet |
Arctic Arctic Ocean Ellesmere Island Greenland Yermak Plateau Nares Kap Makarov Basin Morris Jesup Rise Eurasia Basin Kap Washington |
genre |
Arctic Arctic Ocean Ellesmere Island Greenland Iceland Kap Washington Lincoln Sea Lomonosov Ridge makarov basin Nares strait Yermak plateau |
genre_facet |
Arctic Arctic Ocean Ellesmere Island Greenland Iceland Kap Washington Lincoln Sea Lomonosov Ridge makarov basin Nares strait Yermak plateau |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 275-290 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 275-290 1600-4590 0106-1046 10.7146/moggeosci.v8i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601/183614 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139601 |
op_doi |
https://doi.org/10.7146/moggeosci.v8i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
8 |
_version_ |
1789329882951450624 |