DIAMETER MEASUREMENTS OF A 700-M DEEP BORE-HOLE AT MIZUHO STATION, EAST ANTARCTICA

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概要

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• The closure rate was obtained by measuring the change in diameter of the bore-hole. The diameter measurements were firstly made on 3rd August 1984,the second day after the completion of the drilling. It was repeated eighttimes for one year and a half, and the last measurements were carried out on 19th January 1986. The strain rate of the bore-hole was calculated from these observations. It decreased with time at shallow depths continuously, indicating that the steady state had not been reached for the observation period. At deeper depths, the strain rate decreased in the early period, but icreased at later stages, taking a minimum value in between. The minimum strain rate was achieved earlier at deep depths than at shallow depths. A power law was obtained between the minimum strain rate and the shear stress at various depths. The power law was compatible with that derived from observations of surface flow at Mizuho Plateau.

• 国立極地研究所の論文

著者

• Naruse Renji

  Institute of Low Temperature Science, Hokkaido University

• Kawada Kunio

  Faculty Of Science Toyama University

• Nagoshi Masayasu

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• Nakawo Masayoshi

  Department of Applied Physics,Faculty of Engineering, Hokkaido University

• NAKAWO Masayoshi

  Research Institute for Humanity and Nature

• Okuhira Fumio

  Gifu Prefectural Institute for Environmental Pollution

• Nakawo Masayoshi

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• Nakawo Masayoshi

  Atmospheric And Hydrospheric Research Institute Nagoya University

• Nakawo M

  Research Institute For Humanity And Nature

• Naruse Reij

  Institute Of Low Temperature Science Hokkaido University

• Naruse Renji

  Institute Of Low Temperature Science Hokkaido University

• Okuhira Fumio

  Gifu Prefectural Research Institute For Environmental Pollution

• Nakowo Masayoshi

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

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