Structure and Plate Tectonic Evolution of the Marine Arctic as Revealed by Aeromagnetics

• Main Authors: Vogt, P, Bernero, C, Kovacs, L, Taylor, P
• Format: Article in Journal/Newspaper
• Language: English
• Published: Gauthier-Villars 1981
• Subjects: Arctic; Canada; Chukchi Borderland; Greenland; Norwegian Sea; Arctic Basin; canada basin; Chukchi; Lomonosov Ridge
• Online Access: https://archimer.ifremer.fr/doc/00245/35663/34171.pdf; https://archimer.ifremer.fr/doc/00245/35663/

Over 400,000 km of low level aeromagnetic data were collected by US Navy research organization over the Arctic Basin and Greenland-Norwegian Sea during the years 1972 to 1978. These data provide new constraints on the crustal structure and tectonic evolution of this vast region. Magnetic anomalies over continental fragments (Lomonosov Ridge and Chukchi Borderland) are irregular, with local short-wavelength features indicating relatively shallow basement. Sea-floor spreading between Scandinavia and Greenland commenced about 58 m.y.b.p. during the reversed period preceding anomaly 24. Spreading between the Lomonosov Ridge and Eurasia also began at this time or possibly somewhat earlier. An extinct spreading axis in the Canada Basin is indicated by gravity and magnetic data.