Fast ascend of basaltic magmas from 7600 BP eruption of Shiveluch

Авторы: Gordeychik B., Churikova T., Kronz A., Sundermeyer C., Simakin A., Wörner G.
Сборник: Volcanism and Seismicity in the Subduction Zone. 10th Biennial Workshop on Japan-Kamchatka-Alaska Subduction Processes (JKASP-2018). Petropavlovsk-Kamchatsky, 20-26 August, 2018
Тезисы
Год издания: 2018
Место издания: IViS FEB RAS Petropavlovsk-Kamchatsky
Аннотация: We have a fundamental understanding of the principal magmatic processes of compositional differentiation and mixing of magmas prior to their eruption. However, the duration of these magmatic processes preceding the eruption, i.e. differentiation, storage, mixing, and rejuvenation of the melts from crystal mush, as well as amalgamation of distinct magma batches, are yet to be understood. Here we describe the olivine crystals from 7600 14C BP eruption of Shiveluch volcano (Kamchatka) that preserve the full history of growth and diffusion from deep mantle source to the Earth surface at unprecedented level of detail (Gordeychik et al., 2018). Based on Fo and Ni diffusion modeling, we demonstrate that olivines stayed in mixed mafic magmas at mantle depth for 100 to 2000 days before their ascent to surface that lasted only 1-10 days.
Добавил в систему: Гордейчик Борис Николаевич

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