The Timescales of Magma Mixing in the Plumbing System of Bezymianny Volcano (Kamchatka): Insights from Diffusion Chronometry


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Аннотация

Intrusion of magma of contrasting composition into a magma chamber often triggers eruptions of arc volcanoes. Application of the diffusion chronometry method allowed us to determine the time when fresh magma was supplied to the shallow chamber of Bezymianny volcano in the case of six eruptions in 2006–2012 and to compare them to the recorded seismic activity of this volcano. Two types of eruptions of Bezymianny volcano were distinguished, with a contrasting orthopyroxene rim being formed in the respective magmas (a) up to 3 years and (b) up to 2 months before the beginning of an eruption. It was shown that these differences are caused by two different paths of magma supply to the shallow chamber of Bezymianny volcano.

Авторлар туралы

V. Davydova

Department of Geology

Хат алмасуға жауапты Автор.
Email: vestadav@gmail.com
Ресей, Moscow, 119991

V. Shcherbakov

Department of Geology

Email: vestadav@gmail.com
Ресей, Moscow, 119991

P. Plechov

Department of Geology; Fersman Mineralogical Museum

Email: vestadav@gmail.com
Ресей, Moscow, 119991; Moscow, 119071

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