Portal de Periódicos da CAPES

Origin and structure of the Iceland Plateau and Kolbeinsey Ridge

1972; American Geophysical Union; Volume: 77; Issue: 29 Linguagem: Inglês

10.1029/jb077i029p05688

2156-2202

G. Leonard Johnson, J. R. Southall, P. Young, Peter Vogt,

Geological and Geophysical Studies

Journal of Geophysical Research (1896-1977)Volume 77, Issue 29 p. 5688-5696 Origin and structure of the Iceland Plateau and Kolbeinsey Ridge G. L. Johnson, G. L. JohnsonSearch for more papers by this authorJ. R. Southall, J. R. SouthallSearch for more papers by this authorP. W. Young, P. W. YoungSearch for more papers by this authorP. R. Vogt, P. R. VogtSearch for more papers by this author G. L. Johnson, G. L. JohnsonSearch for more papers by this authorJ. R. Southall, J. R. SouthallSearch for more papers by this authorP. W. Young, P. W. YoungSearch for more papers by this authorP. R. Vogt, P. R. VogtSearch for more papers by this author First published: 10 October 1972 https://doi.org/10.1029/JB077i029p05688Citations: 44AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Recent geophysical data from the Iceland plateau have revealed that asymmetrical sea-floor spreading is apparently occurring on the mid-ocean ridge. The western (Greenland) side is spreading at an average half rate of 0.77 cm/year out to anomaly 5, whereas the eastern side is spreading at an average half rate of 0.82 cm/year. Magnetic anomalies strongly suggest an extinct spreading axis on the Iceland plateau between 10 and 30 m.y. B.P. The quiet magnetic field and seismic reflection data support the hypothesis that the Jan Mayen ridge and 75 km of sea floor to its west are continental in origin. References Allan, T. D., M. Pisani, Gravity and magnetic measurements in the Red Sea, in the World Rift System, Geol. Surv. Can. Bull., 66-14, 62– 63, 1966. Avery, O. E., G. D. Burton, J. D. Heirtzler, An aeromagnetic survey of the Norwegian Sea, J. Geophys. Res., 73, 4583– 4600, 1968. Avery, O. E., P. R. Vogt, R. H. Higgs, Morphology, magnetic anomalies, and evolution of northeast Atlantic and Labrador Sea, 2, Magnetic anomalies (abstract), Eos Trans. AGU, 50, 184, 1969. Bé, A. W. H., J. M. Forns, C. A. Roels, Plankton abundance in the North Atlantic, Fertility of the Sea, 1 J. D. Costlow, 17– 50, Gordon and Breach, New York, 1971. Ewing, J., M. Ewing, Sediment distribution on the mid-ocean ridges with respect to spreading of the sea floor, Science, 156, 1590– 1592, 1967. Fitch, F. J., The development of the Beerenberg Volcano, Jan Mayen, Proc. Geol. Ass., 75, 133– 165, 1964. Fitch, F. J., R. L. Grasty, J. A. Miller, Potassium-argon ages of rocks from Jan Mayen and an outline of its volcanic history, Nature, 207, 1349– 1351, 1965. Gjelsvik, T., Volcano on Jan Mayen alive again, Nature, 228, 352, 1970. Heezen, B. C., M. Ewing, E. T. Miller, Trans-Atlantic profile of total magnetic intensity and topography, Dakar to Barbados, Deep Sea Res., 1, 25– 33, 1953. Heirtzler, J. R., G. O. Dickson, E. M. Herron, W. C. Pitman III, X. Le Pichon, Marine magnetic anomalies, geometric field reversals, and motions of the ocean floor and continents, J. Geophys. Res., 736, 2119– 2136, 1968. Hilde, T. W. C., Magnetic profiles across the Gulf of California, Amer. Ass. Petrol. Geol. Mem., 3, 122– 126, 1964. Horsfield, W. T., P. I. Maton, Transform faulting along the De Geer Line, Nature, 226, 256– 257, 1970. Jakobsson, S. P., Chemistry and distribution pattern of recent basaltic rocks in Iceland, Lithos, 1972. Johnson, G. L., B. C. Heezen, Morphology and evolution of the Norwegian and Greenland Sea, Deep Sea Res., 16, 755– 771, 1967a. Johnson, G. L., B. C. Heezen, The Arctic mid-oceanic ridge, Nature, 215, 724– 725, 1967b. Johnson, G. L., B. Tanner, Geophysical observations on the Iceland-Faeroe Ridge, Jokull, 21, 45– 52, 1972. Johnson, G. L., andP. R. Vogt, Marine geology of the Atlantic north of Arctic Circle, in Second Arctic Symposium,American Association of Petroleum Geologists,Tulsa, Okla., in press,1972. Johnson, G. L., J. S. Freitag, J. A. Pew, Structure of the Norwegian Basin, Nor. Polarinst. Arbok, 1969, 7– 16, 1971a. Johnson, G. L., P. R. Vogt, O. E. Avery, Evolution of the Norwegian Basin, Geology of the East Continental Margin, 70/14 F. M. Delany, 53– 65, Institute of Geological Sciences, London, 1971b. Krause, D. C., N. D. Watkins, North Atlantic crustal genesis in the vicinity of the Azores, Geophys. J. Roy. Astron. Soc., 19, 261– 283, 1970. Le Pichon, X., Sea-floor spreading and continental drift, J. Geophys. Res., 73, 3661– 3697, 1968. Le Pichon, X., S. Eittreim, J. Ewing, A sedimentary channel along Gibbs fracture zone, J. Geophys. Res., 76, 2891– 2895, 1971. Litvin, V. M., Origin of the bottom configuration of the Norwegian Sea, Oceanology, 54, 90– 96, 1966. Loncarevic, B. D., R. L. Parker, The Mid-Atlantic Ridge near 45°N, 17, Magnetic anomalies and ocean floor spreading, Can. J. Earth Sci., 8, 883– 898, 1971. Morgan, W. J., Rises, trenches, great faults, and crustal blocks, J. Geophys. Res., 73, 1959– 1982, 1968. Morgan, W. J., Convection plumes in the lower mantle, Nature, 230, 42– 44, 1971. Rassokho, A. I., L. I. Senchura, R. M. Deminitskaya, A. M. Karasik, Yu. G. Kicelev, N. K. Timoshenko, The mid-Arctic range as as unit of the Arctic Ocean mountain system, Dokl. Akad. Nauk SSSR, 172, 659– 662, 1967. Serson, P. H., W. L. Hannaford, G. V. Haines, Magnetic anomalies over Iceland, Science, 162, 355– 356, 1968. Sigurdsson, H., G. M. Brown, An unusual enstatite-forsterite basalt from Kolbeinsey Island, north of Iceland, J. Petrol., 11, 205– 220, 1970. Talwani, M., C. C. Windisch, M. G. Langseth, Reykjanes ridge crest: A detailed geophysical study, J. Geophys. Res., 76, 473– 517, 1971. Vogt, P. R., Asthenosphere motion recorded by the ocean floor south of Iceland, Earth Planet. Sci. Lett., 13, 153– 160, 1971. Vogt, P. R., G. L. Johnson, Seismic reflection of an oblique aseismic basement trend on the Reykjanes Ridge, Earth Planet. Sci. Lett., 1972. Vogt, P. R., E. D. Schneider, G. L. Johnson, The crust and upper mantle beneath the sea, The Earth's Crust and Upper Mantle, Geophys. Monogr. Ser., 13 P. J. Hart, 556– 617, AGU, Washington, D.C., 1969. Vogt, P. R., N. A. Ostenso, G. L. Johnson, Magnetic and bathymetric data bearing on seafloor spreading north of Iceland, J. Geophys. Res., 75, 903– 920, 1970. Vogt, P. R., C. N. Anderson, D. R. Bracey, Mesozoic magnetic anomalies, sea-floor spreading, and geomagnetic reversals in the southwestern North Atlantic, J. Geophys. Res., 76, 4796– 4823, 1971. Wilson, J. T., Evidence from ocean islands suggesting movement in the earth, Roy. Soc. London Phil. Trans., 258, 145– 165, 1965. Young, P. W., J. R. Southall, G. L. Johnson, P. R. Vogt, Geophysical investigations on the Iceland plateau (abstract), Eos Trans. AGU, 52, 236, 1971. Citing Literature Volume77, Issue2910 October 1972Pages 5688-5696 ReferencesRelatedInformation