[2oral601-11] T6 ［Topic Session］From magma source and magma plumbing system to volcano formation）

9:45 AM - 10:15 AM JST(12:45 AM - 1:15 AM UTC)Highlight

[T6-O-5] [Invited]Magma evolution prior to eruption: evidences from petrologic and geochemical research connecting magma source and volcanic sink under active worldwide volcanoes

*Antonio M Álvarez Valero¹ (1. University of Salamanca)

【ハイライト講演】火山噴火に至るまで地下ではいったい何がおきているのであろうか？時に災害をもたらす火山噴火を予測するためには，その準備過程の理解が必要不可欠である．本講演では，スペイン・サラマンカ大学のアントニオ アルバレツ教授により，日本・南極・ニュージーランド・アイスランドなど世界各地の活火山について，火山噴火の際のマグマ供給系の構成や機能，マグマの進化過程に関する研究成果を紹介していただく．（ハイライト講演とは．．．）

Keywords:

Magma evolution,Magma plumbing system,Pre-eruptive magma processes,Active volcanoes,Volcanic hazards

Active volcanoes are key natural laboratories to study in detail -and monitoring- the history of magmas before, during and after eruptions. The scientific interest to advance our knowledge of how magma reservoirs behave and evolve is a fundamental and long-lasting target in Earth Sciences in general and in volcanology-petrology-geochemistry in particular, as it is directly related to the type of hazards that volcanoes may generate. When an eruption is already inevitable, the fundamental information about the magmatic evolution under the volcano, which strongly depends on how the plumbing system behaves at depth, is challenging, infrequent and often too late for mitigating volcanic hazards. Hence, combining exhaustive petrological studies of erupted products with volcano monitoring data recorded prior to -and during- a volcanic eruption becomes extremely useful to achieve such purpose, which its first step is integrating petrologic and geochemical research. Studies of petrography, mineral and bulk chemistry, stable isotopes, thermodynamics, micro-CT and microRaman techniques, of erupted materials provide essential information about the plausible mechanisms controlling the next eruption initiation through the physical and chemical changes that occur at depth prior to eruptions. In this talk, we will visit volcanoes within different geological settings (eg. Mt. Zao, Deception Island, Ruapehu, Hofsjökull, Tagoro) connecting from the petrologic and geochemical perspectives the magma plumbing system with its evolution up to eruption at surface. The results of this magma evolution can be considered in further studies of volcanic monitoring to improve the capability to interpret geochemical and geophysical data and signals recorded during volcanic unrest episodes, and hence, forecast volcanic eruptions and related hazards.