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(Article of periodic en Anglais - 2012)

Document title

Kinematics of an alpine retrogressive rockslide in the Japanese Alps

Authors(s) and Affiliation(s)

NISHII R. (1) ; MATSUOKA N. (2) ;
(1) Fac. of Life and Environmental Sciences (Ikawa Univ. Forest), Univ. of Tsukuba, Shizuoka, JAPON
(2) Fac. of Life and Environmental Sciences, Univ., Tsukuba, JAPON

Abstract

This paper discusses the kinematics of a retrogressive rockslide area and factors promoting slope instability subsequent to the 2004 collapse, on the basis of geodetic surveys and meteorological observations from 2006 to 2010. the unstable area consists of 5 active blocks. The main blocks are separated from the stable rock slope by pre-existing "sackung features" that follow the strike of the bedding plane. Shear zones below these sackung features have developed into slip planes potentially causing the next collapse. The primary trigger of the acceleration in the unstable area is the stress release by the 2004 collapse. In addition, the presence of a potential slip plane below the sackung features also promotes slope instability, suggesting that sackung features behind a rockslide area may predefine the new head scarp of a forthcoming collapse

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no15 [pp. 1641-1650]

Bibliographic references : 24 ref.

Collation : 13 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3298

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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