Thermodynamic constraints on devolatilization of variably altered oceanic ultramafic rocks during subduction: Implications for subarc mantle oxidation

Weigang Peng

Presentation information

[E] Oral

S (Solid Earth Sciences ) » S-MP Mineralogy & Petrology

[S-MP32] Oceanic & Continental Subduction Processes: petrologic/geophysical/geochemical perspective

Tue. May 26, 2026 9:00 AM - 10:30 AM Exhibition Hall Special Setting (6) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:REHMAN U. HAFIZ(Kagoshima University), Das Kaushik(Hiroshima University), Imayama Takeshi(Research Institute of Frontier and Science Technology, Okayama University of Science)

10:15 AM - 10:30 AM

[SMP32-06] Thermodynamic constraints on devolatilization of variably altered oceanic ultramafic rocks during subduction: Implications for subarc mantle oxidation

*Weigang Peng¹, Katy A. Evans², James A.D. Connolly³, Yi-Bing Li⁴, Han Hu⁵, Lifei Zhang⁶ (1. Hohai University, 2. Curtin University, 3. ETH Zurich, 4. Zhejiang Ocean University, 5. China Earthquake Administration, 6. Peking University)

Keywords:Altered ultramafic rock, Devolatilization, Subduction, Oxygen fugacity, Subarc mantle oxidation, Thermodynamic modeling