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Snake-head rock avalanche: rock slope failure caused by horizontal seismic accelerationстатья
- Авторы: Strom A.L., Djumabaeva A.B., Dyikanalieva J.K., Ormukov Ch O.
- Сборник: Int. Assoc. for Mathematical Geology XIth International Congress
- Глава в коллективной монографии
- Год издания: 2006
- Издательство: Universite de Liege
- Местоположение издательства: Belgium
- Номер статьи: S08-12
- Аннотация: The Snake-Head rockslide originated as the along-slope motion of 5×106 – 7×106 m3 of Palaeozoic sandstone detached from the rock massif, which could be due to southward-directed seismic acceleration only. Rockslide was accompanied by long-runout rock avalanche in which only ~10% of debris was involved. Failure occurred at the eastern part of the Suusamyr intermontane depression within landslides' cluster associated with recentsurface ruptures. Proximal part of rockslide about 800 m long and several dozens meters thick extends up to sharp narrowing of the valley, which worked as an obstacle on the way of moving rockslide mass. Rock avalanche that started at that point travelled nearly 2000 malong the creek valley with mean angle of about 5º. Its distal part form an elongated palm-likebody 650 m long, up to 150 m wide and up to 5-6 m thick bounded by the levee 4-5 meters high above the surrounding alluvial fan and 1-2 m high above the internal part of rock avalanche deposits. Such morphology excludes its formation by debris flow. Lower part ofthis body is composed of shattered debris, while larger angular boulders cover its surface.
- Добавил в систему: Стром Александр Леонидович