globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116572
论文题名:
Petrologic imaging of the architecture of magma reservoirs feeding caldera-forming eruptions
作者: Black B.A.; Andrews B.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 552
语种: 英语
中文关键词: caldera-forming eruptions ; magma storage ; magmatic architecture ; petrologic imaging ; the life cycle of volcanoes
英文关键词: Architecture ; Feldspar ; Gasoline ; Caldera-forming eruption ; Dispersed structure ; Magma reservoirs ; Saturation pressure ; Thermo-mechanical ; Vertical dimensions ; Vertical separation ; Volcanic systems ; Reservoirs (water) ; caldera ; crustal structure ; image analysis ; magma chamber ; petrology ; volcanic eruption ; volcanology
英文摘要: Caldera footprints and erupted magma volumes provide a unique constraint on vertical dimensions of upper crustal magma reservoirs that feed explosive silicic eruptions. Here we define a Vertical Separation (VS) ratio in which we compare the geometric vertical extent with the range of depths indicated petrologically by melt inclusion water and CO2 saturation pressures for fifteen caldera-forming eruptions spanning ∼100 km3 to ∼103 km3 in volume. We supplement melt inclusion saturation pressures with rhyolite-MELTS barometry and plagioclase-melt hygrometry to generate a petrologic image of magma reservoir architecture. We find that pre-eruptive upper crustal magma reservoirs range from contiguous bodies (where petrologic and geometric estimates match closely) to vertically dispersed structures. Vertically dispersed pre-eruptive reservoirs are more common among intermediate-volume eruptions than among the smallest and largest caldera-forming eruptions. We infer that the architecture of magma reservoirs tracks the thermomechanical evolution of large volcanic systems. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164871
Appears in Collections:气候变化与战略

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作者单位: Earth and Atmospheric Science, City College of New York, New York, NY 10031, United States; Earth and Environmental Sciences, Graduate Center, City University of New York, New York, NY 10017, United States; Global Volcanism Program, Smithsonian Institution, Washington, DC, United States

Recommended Citation:
Black B.A.,Andrews B.J.. Petrologic imaging of the architecture of magma reservoirs feeding caldera-forming eruptions[J]. Earth and Planetary Science Letters,2020-01-01,552
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