We believe that major processes in the crust beneath the
Kluchevskoy group of volcanoes originate in a mantle channel observed
in the lowermost part of the model in all time windows. Mechanically,
thermally or chemically, the mantle channel affects the lower crust
and causes excessive pressure and stresses. This leads to the opening
of cracks and the transportation of fluids and melts upward. When
they reach an intermediate level (10–12 km depth) these fluids lower
the melting temperature of overheated rocks and trigger the creation
of magma sources (e.g., Kohn, 2000; Giordano et al., 2004). At the
same time, decompression may lead to the formation of gas bubbles
that increase the pressure around the intermediate magma reservoirs
(see, for example, Lensky et al., 2004). In turn, this causes the origin of
new fractures and the further activation of fluid transport through the
crust. This avalanche-type positive feedback ultimately ends in eruption
(Fig. 8B).
We believe that major processes in the crust beneath theKluchevskoy group of volcanoes originate in a mantle channel observedin the lowermost part of the model in all time windows. Mechanically,thermally or chemically, the mantle channel affects the lower crustand causes excessive pressure and stresses. This leads to the openingof cracks and the transportation of fluids and melts upward. Whenthey reach an intermediate level (10–12 km depth) these fluids lowerthe melting temperature of overheated rocks and trigger the creationof magma sources (e.g., Kohn, 2000; Giordano et al., 2004). At thesame time, decompression may lead to the formation of gas bubblesthat increase the pressure around the intermediate magma reservoirs(see, for example, Lensky et al., 2004). In turn, this causes the origin ofnew fractures and the further activation of fluid transport through thecrust. This avalanche-type positive feedback ultimately ends in eruption(Fig. 8B).
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