Ground penetrating radar sounding on an active rock glacier on James Ross Island, Antarctic Peninsula region

• Autorzy: Fukui K , Sone T. , Strelin J. , Torielli C. , Mori J.
• Języki publikacji: EN

Abstrakty

EN

This study used ground penetrating radar soundings to examine a tongue-shaped rock glacier (64°04'S 58°25'W) on James Ross Island, Antarctic Peninsula, in January 2005. The rock glacier studied has multiple well-developed transverse ridges and approximately 800 m long from the talus of its head to its frontal slopes and is 300 m wide in the middle. The longitudinal ground penetrating radar profile identified debris bands which dip up-glacier, similar to the thrust structures in the compression zone of a valley glacier. Transverse ground penetrating radar profiles indicated a layered structure which is inclined towards the central part of the rock glacier and which resembles the transverse foliation of a valley glacier. Consequently, the internal structure of the rock glacier is revealed as being similar to the "nested spoons" common in the interior of valley glaciers. We concluded that this rock glacier has been created by the deformation of a glacier ice core and a thick and continuous debris mantle.

Słowa kluczowe

EN

rock glacier; ground penetrating radar; James Ross Island; Antarctic Peninsula; glacier

• Wydawca: -
• Czasopismo: Polish Polar Research
• Rocznik: 2007
• Tom: 28
• Numer: 1
• Opis fizyczny: p.13-22,fig.,ref.

Twórcy

autor

Fukui K

• National Institute of Polar Research, 1-9-10 Kaga, Itabashi-ku, Tokyo 173-8515, Japan

autor

Sone T.

autor

Strelin J.

autor

Torielli C.

autor

Mori J.

Bibliografia

• BARSCH D. 1996. Rockglaciers: Indicators for the present and former Geoecology in high mountain environments. Springer, Berlin: 331 pp.
• BENN D. and EVANS D. 1998. Glaciers and Glaciation. Arnold, London: 734 pp.
• BIBBY, J.S. 1966. The Stratigraphical of Part of North-East Graham Land and James Ross Island Group. British Antarctic Survey. Scientific Report no. 53: 37 pp.
• CHINN T.J.H. and DILLON A. 1987. Observations of a debris-covered polar glacier Whisky Glacier James Ross Island, Antarctic Peninsula, Antarctica. Journal of Glaciology 33: 300-310.
• FUKUDA M., Strelin J., Shimokawa K., Takahashi N., Sone T. and Torombotto D. 1992. Permafrost occurrence of Seymour Island and James Ross Island, Antarctic Peninsula Region. In: Y. Yoshida, K. Kaminuma and K. Shiraishi (eds) Recent Progress in Antarctic Earth Science. Terra Science Publishing Company, Tokyo: 745-750.
• HAEBERLIW. 1985. Creep of mountain permafrost: internal structure and flow of Alpine rock glaciers. Mitteilungen der Versuchanstalt für Wasserbau, Hydrologie und Glaziologie, no. 77, Zürich: 142 pp.
• HOOKE R.L. and HUDLESON P.J. 1978. Origin of foliation in glaciers. Journal of Glaciology 20: 285-299.
• HUMLUM O. 1998. The climate significance of rock glaciers. Permafrost and Periglacial Processes 9: 372-395.
• LUNDQVIST J., LILLIESKÖLD M. and ÖSTMARK K. 1995. Glacial and periglacial deposits of Tumbledown Cliffs area, James Ross Island, West Antarctica. Geomorphology 11: 205-214.
• SERRANO E. and LÓPEZ-MARTĺNEZ J. 2000. Rock glaciers in the South Shetland Islands, Western Antarctica. Geomorphology 35: 145-162.
• SONE T. and STRELIN J.A. 1997. Air temperature conditions and climatic-geomorphological characteristics of James Ross Island, Antarctic Peninsula. In: C.A. Rinaldi (ed.) Cuartas Jornadas de communicaciones sobre investigaciones Antarticas. Direction Nacional de Antarticas, Buenos Aires: 372-377.
• STRELIN J.A. and MALAGNINO E.C. 1992. Geomorfología de la isla James Ross. In: C.A. Rinaldi (ed.) Geología de la Isla James, Antártida, Instituto Antartico Argentine, Buenos Aires: 7-36.
• STRELIN J.A. and SONE T. 1994. Rock Glaciers in Antarctica. International Symposium and Field Meeting "The Termination of the Pleistocene in South America" IGCP Project 253 Abstract. CADIC, Ushuaia: 36-38.
• STRELIN J.A. and SONE T. 1998. Rock glaciers on James Ross Island, Antarctica. In: A.G. Lewkowicz and M. Allard (eds) Permafrost - Proceedings of the 7th International Permafrost Conference. Collection Nordicana University Laval, Quebec: 1027-1032. Received 2 November 2005 Accepted 16 August 2006