Changes in iron oxidation state as magma rises are driven by degassing and fractional crystallization
the verdict
SUPPORTED
the evidence backs this
confidence 86/100
Multiple petrological and thermodynamic studies support the conclusion that changes in iron oxidation state during magma ascent and evolution are driven by a combination of degassing and fractional crystallization.
Evidence for · 3
Sulfur_X: A Model of Sulfur Degassing During Magma Ascent
2023 · cited by 53
Demonstrates that degassing processes during magma ascent track and drive changes in iron and sulfur redox states.
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More for · 2
Sulphur behaviour and redox conditions in etnean magmas during magma differentiation and degassing
2020 · cited by 20
Shows that magma differentiation and fractional crystallization, coupled with degassing, significantly alter oxygen fugacity and iron/sulfur behavior.
The redox "filter" beneath magmatic orogens and the formation of continental crust.
2018 · cited by 16
Indicates that fractional crystallization (such as of garnet) causes simultaneous oxidation and iron depletion in ascending or differentiating magmas.