20. Magnetic Anomalies in the Sea of Japan and the Shikoku Basin: Possible Tectonic Implications

  1. George H. Sutton,
  2. Murli H. Manghnani,
  3. Ralph Moberly and
  4. Ethel U. Mcafee
  1. Kazuo Kobayashi1 and
  2. Nobuhiro Isezaki2

Published Online: 17 MAR 2013

DOI: 10.1029/GM019p0235

The Geophysics of the Pacific Ocean Basin and Its Margin

The Geophysics of the Pacific Ocean Basin and Its Margin

How to Cite

Kobayashi, K. and Isezaki, N. (1976) Magnetic Anomalies in the Sea of Japan and the Shikoku Basin: Possible Tectonic Implications, in The Geophysics of the Pacific Ocean Basin and Its Margin (eds G. H. Sutton, M. H. Manghnani, R. Moberly and E. U. Mcafee), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM019p0235

Author Information

  1. 1

    Ocean Research Institute, University of Tokyo, Tokyo 164, Japan

  2. 2

    Meteorological College, Kashiwa 277, Japan

Publication History

  1. Published Online: 17 MAR 2013
  2. Published Print: 1 JAN 1976

ISBN Information

Print ISBN: 9780875900193

Online ISBN: 9781118663592

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Keywords:

  • Geophysics—Pacific area—Congress;
  • Woollard, George Prior, 1908

Summary

Recent magnetic surveys in the Sea of Japan and the Shikoku basin indicate the existence of linear magnetic anomalies and their offsets by transform faulting. Age identification of these anomalies has not yet been made, but there are indications that the ages of the anomalies in the Sea of Japan may be of pre-Cenozoic age, and those in the basin may be of Miocene age. Possible spreading centers were identified in both basins through analysis of magnetic anomaly profiles reduced to meridian. Based on these and other geophysical observations, a hypothesis is proposed to explain the evolution of marginal seas by sea-floor spreading.