Geology of Axial Seamount, Juan de Fuca Spreading Center, Northeastern Pacific

  1. John M. Sinton
  1. L. P. Zonenshain1,
  2. M. I. Kuzmin2,
  3. Yu. A. Bogdanov1,
  4. A. P. Lisitsin1 and
  5. A. M. Podrazhansky1

Published Online: 19 MAR 2013

DOI: 10.1029/GM057p0053

Evolution of Mid Ocean Ridges

Evolution of Mid Ocean Ridges

How to Cite

Zonenshain, L. P., Kuzmin, M. I., Bogdanov, Yu. A., Lisitsin, A. P. and Podrazhansky, A. M. (1989) Geology of Axial Seamount, Juan de Fuca Spreading Center, Northeastern Pacific, in Evolution of Mid Ocean Ridges (ed J. M. Sinton), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM057p0053

Author Information

  1. 1

    Institute of Oceanology, the USSR Academy of Sciences, Moscow, 117218, USSR

  2. 2

    Institute of Geochemistry, the Siberian Branch of the USSR Academy of Sciences, 664033, Irkutsk, USSR

Publication History

  1. Published Online: 19 MAR 2013
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780875904580

Online ISBN: 9781118666449

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Keywords:

  • Sea—floor spreading—Congresses;
  • Mid-ocean ridges—Congresses

Summary

Axial Seamount was studied in detail with two Pisces submersibles during the 12th cruise of the Soviet R/V Akademik Mstislav Keldysh in fall of 1986. The data reveal a three-stage evolution of Axial Seamount. In the first stage (50,000–60,000 years ago), the axial volcano was constructed from tube lava flows. The second stage began nearly 5,000 years ago with intensive sheet flow eruptions on the axial volcano summit and finished with a catastrophic event, when the summit collapsed and the central caldera appeared. During the third, or postcaldera, stage the caldera floor was flooded with sheet flow lavas that were associated with collapsed lava pits, lava lakes and superimposed high-temperature hydrothermal activity.