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1999 Fiscal Year Final Research Report Summary

Study on rock glaciers in the Japanese Islands and their palaeoenvironmental significance

Research Project

Project/Area Number 09680179
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 自然地理学
Research InstitutionTokyo Metropolitan University

Principal Investigator

IWATA Shuji  Professor, Dept of Geogr., Tokyo Metopl. Univ., 大学院・理学研究科, 教授 (60117695)

Co-Investigator(Kenkyū-buntansha) MATSUOKA Norikazu  Accoc Prof., Dept of Geosci., Tsukuba Univ., 地球科学系, 助教授 (10209512)
YAMADA Shuji  Lecturer, Dept of Geogr, Tokyo Metropl. Univ., 大学院・理学研究科, 助手 (80295469)
SUZUKI Takehiko  Lecturer, Dept of Geogr, Tokyo Metropl. Univ., 大学院・理学研究科, 助手 (60240941)
TAKAOKA Sadao  Prof., Dept of Geogr., Senshu. Univ., 文学部, 助教授 (90260786)
MIURA Hideki  Lecturer, National Institute for Polar Research, 助手 (10271496)
Project Period (FY) 1997 – 1999
KeywordsRock glacier / Japanese high mountains / Mountain permafrost / large-scale contour maps / geoelectrical measurements / Palaleoenvironments
Research Abstract

1. More than 30 rock glaciers were found and mapped by aerial photo-interpretation of the present study, and a preliminary inventory of rock glaciers was completed. Most of the rock glaciers are located in the Hida Mountains, central Japan, and a few in the Akaishi Mountains, central Japan, and the Hida Mountains and Taisetsu Volcanic Massif, Hokkaido.
2. The inventory contains 22 large-scale contour maps of typical rock glaciers compiled by using stereo-plotting of air photographs.
3. The internal structures of rock glaciers has been approached by indirect geophysical soundings such as the year-round monitoring of ground temperature besides the snow-depth measurements and geoelectrical measurements. In Kuranosuke Rock Glacier a frozen layer was observed beneath the surface debris layer in October, 1999.
Field researches of active rock glaciers were carried out outside Japan, in the Nepal and Bhutan Himalayas, the Swiss Alps, and Antarctica.
The periglacial model attributes a slow rock glacier movement to permafrost creep.
Rock glaciers in the Japanese high mountains were classified into the following three types and periods: (1) Fossil rock glaciers formed during the Late Glacial period around 10000 years ago, (2) Fossil rock glaciers formed during the Neoglacial and Little Ice Age periods between a few million years and a few hundred years ago, (3) Inactive rock glaciers formed during the Little Ice Age between a few hundred years ago and 150 years ago. The mountain permafrost belt must have been wide enough to form a number of rock glaciers during the above mentioned cold periods. Subsequent permafrost melting would have fossilized these rock glaciers, some of which may have been misinterpreted as moraine ridges or protalus ramparts.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 福井幸太郎・岩田修二: "立山、内蔵助カールでの永久凍土の発見"雪氷. 62. 23-28 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda, A. and Matsuoka, N.: "Measuremeuts of bottom temperature of the winter snow cover (BTS) in relation to rock glacier activity, corviglia, Swiss Alps"Ann. Rep. Inst. Geosci., Univ. Tsukuba. 25. 13-17 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 松岡憲知: "岩石氷河-氷河説と周氷河説"地学雑誌. 107. 1-24 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Matsuoka, N. & Ikeda, A.: "Some obsenvations regarding mountain pevmafvost in the Japanese Alps"Ann. Rep. Inst. Geasci., Univ, Tsukuba. 24. 19-25 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saigusa, s., Miura, H., and others: "Preliminary reportsof vock glaciensat the foot of Mt. Riisen-Larsen in Ender by Land, East Antarctica"南極資料. 42. 168-178 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Fukui, K. and Iwata, S.: "Results of permafrost investigation in Kuranosuke Cirque, Tateyama, the Japanese Alps"Seepyo. 62. 23-28 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda, A. and Matsuoka, N.: "Measurements of bottom temperature of the winter snow cover (BTS) in relation to rock glacier activity, Corviglia, Swiss Alps: a preliminary report"Ann. Rep. Inst. Geosci., Univ. Tsukuba. No. 25. 13-175 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Matsuoka, N.: "Rock glaciers: Glacial and periglacial?"Journal of Geography. 107(1). 1-24 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Matsuoka, N. and Ikeda, A.: "Some observations regarding mountain permafrost in the Japanese Alps."Ann. Rep. Inst. Geosci., Univ. Tsukuba. No. 24. 19-25 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saigusa, S., Miura, H., Maemoku, H., and Hirakawa, K.: "Preliminary report on rock glaciers at the foot of Mt. Riiser-Larsen in Enderby Land, East Antarctica"Antarctic Record. 42(2). 168-178 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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