Title: Extinct triple junction south of Greenland and the Tertiary motion of Greenland relative to North America
Abstract: Research Article| July 01, 1977 Extinct triple junction south of Greenland and the Tertiary motion of Greenland relative to North America YNGVE KRISTOFFERSEN; YNGVE KRISTOFFERSEN 1Lamont-Doherty Geological Observatory, and the Department of Geological Sciences of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar MANIK TALWANI MANIK TALWANI 1Lamont-Doherty Geological Observatory, and the Department of Geological Sciences of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information YNGVE KRISTOFFERSEN 1Lamont-Doherty Geological Observatory, and the Department of Geological Sciences of Columbia University, Palisades, New York 10964 MANIK TALWANI 1Lamont-Doherty Geological Observatory, and the Department of Geological Sciences of Columbia University, Palisades, New York 10964 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1977) 88 (7): 1037–1049. https://doi.org/10.1130/0016-7606(1977)88<1037:ETJSOG>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation YNGVE KRISTOFFERSEN, MANIK TALWANI; Extinct triple junction south of Greenland and the Tertiary motion of Greenland relative to North America. GSA Bulletin 1977;; 88 (7): 1037–1049. doi: https://doi.org/10.1130/0016-7606(1977)88<1037:ETJSOG>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Geophysical data collected by R/V Vema during cruises from 1960 to 1973 in the area south of Greenland were used to establish details of the magnetic lineation pattern and the basement morphology associated with an extinct triple junction. The sequence of magnetic anomalies 20 to 24 (49 to 60 m.y. B.P.) is continuous from the western flank of the Reykjanes Ridge into the Labrador Sea north and south of the triple junction and defines a period of simultaneous sea-floor spreading in the Norwegian Sea, the North Atlantic, and the Labrador Sea. At the time of anomaly 20 (49 m.y. B.P.) a major slowdown in the rate of spreading of the Labrador Sea Ridge occurred, and it met with extinction prior to the time of anomaly 13 (∼40 m.y. B.P.). The magnetic lineation pattern shows the amount of opening in the Labrador Sea between the interval spanned by anomalies 13 to 21 and that spanned by anomalies 21 to 23. An independent estimate of the relative motion between Greenland and North America was obtained from the difference in the opening between Greenland and Europe and that between North America and Europe. This second estimate predicts more opening of the Labrador Sea than is observed. Bounds can nevertheless be placed on the early Tertiary relative motion between Greenland and North America, and this motion compares well with the history of tectonic deformation in the Canadian Arctic islands during the Eurekan orogeny. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 1977
Publication Date: 1977-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 149
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