Changes in iron oxidation state as magma rises are driven by degassing and fractional crystallization

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

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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.

The analysis

The claim specifies that iron oxidation state changes during magma rise are driven by degassing and fractional crystallization. Papers [0], [2], and [3] explicitly discuss how ascent-driven degassing and fractional crystallization processes control oxygen fugacity and iron/sulfur redox states in magmatic systems. No papers refute this well-established petrological mechanism.

Evidence for · 3

Sulfur_X: A Model of Sulfur Degassing During Magma Ascent

Recorded source metadata

S. Ding, T. Plank, P. Wallace, D. Rasmussen. Sulfur_X: A Model of Sulfur Degassing During Magma Ascent. 2023. https://doi.org/10.1029/2022GC010552

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

Recorded source metadata

E. Gennaro, A. Paonita, G. Iacono-Marziano, Yves Moussallam, M. Pichavant, N. Peters, C. Martel. Sulphur behaviour and redox conditions in etnean magmas during magma differentiation and degassing. 2020. https://doi.org/10.1093/petrology/egaa095

Shows that magma differentiation and fractional crystallization, coupled with degassing, significantly alter oxygen fugacity and iron/sulfur behavior.

Source citation format

The redox "filter" beneath magmatic orogens and the formation of continental crust.

Recorded source metadata

Tang M, Erdman M, Eldridge G, Lee CA. The redox "filter" beneath magmatic orogens and the formation of continental crust.. 2018. https://doi.org/10.1126/sciadv.aar4444

Indicates that fractional crystallization (such as of garnet) causes simultaneous oxidation and iron depletion in ascending or differentiating magmas.

Source citation format

The paper trail · every fact has a biography

first checked02 Aug 2026

judged → SUPPORTED · 8602 Aug 2026

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