Documenting Magnatic Processes at Filicudi Island, Aeolian Arc, Italy: Integrating Quantitative Modeling and Plagioclase Textural and in situ Compositional Data

<p>Documenting the physiochemical processes that influence magma composition is critical for forecasting eruption styles and managing volcanic hazards. Compositional diversity of magmas develops through recharge, assimilation, and fractional crystallization (RAFC) within subvolcanic magma reservoirs. Integration of MELTS modeling, whole rock, plagioclase textural and in situ elemental and isotopic data from Filicudi Island, Italy allow documentation of the roles and relative chronology that RAFC played in the magmatic evolution and elucidates aspects of the magma plumbing system structure.</p> <p>Results indicate a polybaric magma plumbing system with deeper (3.5-4 kilobars) and shallower (0.5-1.2 kilobars) storage regions. Within the deeper system, FC acted to differentiate magma, while water contents acted to suppress plagioclase growth. Differentiated magma intruded to shallower levels, where plagioclase crystallized rapidly resulting in monotonous textures and high anorthite contents. Within the shallower system, recharge from the deeper system and continued FC contributed to the compositional diversity observed on Filicudi Island.</p>

Name thesis:degree_name

Master of Science (MS)

Discipline thesis:degree_discipline

Geological Sciences

Year dc:date.available

2012

Author dc:creator

• Harris, Michelle

Contributors dc:contributor

• Wendy Bohrson
• Chris Mattinson
• Michael Rowe

• Magma
• Italy
• composition
• minerals
• Geology
• Geomorphology
• Geophysics and Seismology
• Mineral Physics
• Volcanology

Repository record dc:identifier

https://digitalcommons.cwu.edu/etd/1450

OAI identifier oai:identifier

oai:digitalcommons.cwu.edu:etd-2475