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Volatile resorption expedites eruption onset in large silicic systems.
Franziska Keller1,2, Meredith Townsend3, Juliana Troch4
1Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA, USA. kellerf@tcd.ie.
Nature Communications
|March 13, 2026
Summary
Volatile resorption, not just exsolution, can accelerate magma chamber pressurization, potentially triggering hazardous silicic caldera-forming eruptions. Monitoring for resorption signatures may offer early eruption warnings.
Area of Science:
- * Volcanology
- * Geochemistry
- * Earth Sciences
Background:
- * Silicic caldera-forming eruptions are highly hazardous but poorly understood.
- * Volatile exsolution is a known driver, but other mechanisms may exist.
Purpose of the Study:
- * To investigate the role of volatile resorption in magma chamber pressurization.
- * To determine conditions under which volatile resorption occurs and its impact on eruption dynamics.
Main Methods:
- * Utilized a thermo-mechanical magma chamber model.
- * Analyzed the Aso-4 eruption as a potential natural case study.
Main Results:
- * Volatile resorption can pressurize magma chambers faster than exsolution in rapidly recharged systems.
- * Resorption is driven by pressure increase and crystal melting.
- * Model predicts resorption at recharge rates >10-2.4 km3/yr, amplifying pressurization by reducing compressibility.
Conclusions:
- * Volatile resorption is a key process in destabilizing large silicic magma systems.
- * This process accommodates and promotes rapid chamber pressurization, leading to eruptions.
- * Detecting resorption signatures could provide crucial early warning for volcanic eruptions.
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