Eruptive process, effects and deposits of the 1996 and ancient basaltic phreatomagmatic eruptions in Karymskoye lake,Kamchatka, Russia

Авторы: Belousov A., Belousova M.
Сборник: Lacustrine Volcanoclastic Sedimentation
Том: 30
Глава в коллективной монографии
Год издания: 2001
Место издания: IAS Special Volume
Первая страница: 235
Последняя страница: 260
Аннотация: On 2-3 January 1996 an explosive eruption discharging = l0 6 kgs -1 of basaltic magma occurred inKarymskoye lake at an initial water depth of ~ 50 m. Characteristics of the deposits together with analyses of a videotape of several explosions have allowed us to model the eruptive events. Initial vent-clearing phreatic explosions ejected blocks of country rocks (up to 3 m diameter) to distances of up to 1.3 km. Then followed 10-20 h of phreatomagmatic Surtseyan activity (100-200 outbursts of water-gas-pyroclastic mixtures to heights of up to 1 km, with initial velocities of 110 m/s. The eruption slugs collapsed back into the lake and produced base surges (runout up to 1.3 km; average velocity 12.5 m/s). crust bombs (specific basaltic bombs with dense core and scoriaceous crust).
Добавил в систему: Белоусов Александр Борисович

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