Tectonic History of the Arctic Basins: Partial Solutions and Unsolved Mysteries (Chapter 3)

• Main Authors: Vogt,Peter R., Avery,Otis E.
• Other Authors: NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C
• Format: Text
• Language: English
• Published: 1974
• Subjects: Geology; Geochemistry and Mineralogy; *ARCTIC REGIONS; *TECTONICS; GEOMAGNETISM; BATHYMETRY; SEISMIC DATA; OCEAN BOTTOM SAMPLING; NORTH ATLANTIC OCEAN; OCEAN BOTTOM TOPOGRAPHY; SEDIMENTS; OCEANIC CRUST; MAGNETIC ANOMALIES; ICELAND; ARCTIC OCEAN; *Ocean bottom spreading; Lomonosov Ridge; Plate tectonics; Labrador Sea; Reykjanes Ridge; MidAtlantic Ridge; Arctic; Arctic Ocean; Reykjanes; Eurasia Basin; Arctic Basin; Iceland; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/ADA005411; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA005411

As yet inaccessible to deep-sea drilling and shipborne surveying, the ice-locked Arctic Basin has been slow to give up details of crustal genesis and later modification. Extensive geophysical surveying both in the Arctic Basin and the North Atlantic confirms sea-floor spreading as the only probable mode of crustal genesis for the Eurasia Basin. Magnetic anomalies, although less clear than elsewhere suggest spreading rates of approximately 0.5 to 1 cm/yr since 10 m.y.b.p.; the basin was born perhaps 60 m.y.b.p., with the separation of the Lomonosov Ridge from the Eurasian margin. Reprint from Marine Geology and Oceanography of the Arctic Seas.