We interpret this feature as a channel
bringing deep mantle materials with high fluid and melt content to the bottom of the crust. This mantle channel
directly or indirectly determines the activity of all volcanoes of the Kluchevskoy group. In the crust, we model
complex structure that varies over time. During the pre-eruptive period, we detected two levels of potential
magma storage: one in the middle crust at 10–12 km depth and one close to the surface just below Kluchevskoy
volcano. In 2005, a year of powerful eruptions of Kluchevskoy and Besymiyanny volcanoes, we observe a general
increase in Vp/Vs throughout the crust. In the relaxation period following the eruption, the Vp/Vs values are
generally low, and no strong anomalous zones in the crust are observed. We propose that very rapid variations
in Vp/Vs are most likely due to abrupt changes in the stress and deformation states, which cause fracturing and
the active transport of fluids. These fluids drive more fracturing in a positive feedback system that ultimately
leads to eruption. We envision the magma reservoirs beneath the Kluchevskoy group as sponge-structured
volumes that may quickly change the content of the molten phases as fluids pulse rapidly through the system
We interpret this feature as a channelbringing deep mantle materials with high fluid and melt content to the bottom of the crust. This mantle channeldirectly or indirectly determines the activity of all volcanoes of the Kluchevskoy group. In the crust, we modelcomplex structure that varies over time. During the pre-eruptive period, we detected two levels of potentialmagma storage: one in the middle crust at 10–12 km depth and one close to the surface just below Kluchevskoyvolcano. In 2005, a year of powerful eruptions of Kluchevskoy and Besymiyanny volcanoes, we observe a generalincrease in Vp/Vs throughout the crust. In the relaxation period following the eruption, the Vp/Vs values aregenerally low, and no strong anomalous zones in the crust are observed. We propose that very rapid variationsin Vp/Vs are most likely due to abrupt changes in the stress and deformation states, which cause fracturing andthe active transport of fluids. These fluids drive more fracturing in a positive feedback system that ultimatelyleads to eruption. We envision the magma reservoirs beneath the Kluchevskoy group as sponge-structuredvolumes that may quickly change the content of the molten phases as fluids pulse rapidly through the system
การแปล กรุณารอสักครู่..
