近日，法国克莱蒙奥弗涅大学Olivier Roche团队研究了岩浆中剪切诱导的气泡成核。这一研究成果于2025年11月6日发表在《科学》杂志上。

岩浆中气泡的成核作用是控制火山喷发动力学的关键过程。

研究组聚焦于在火山环境中普遍存在的黏性剪切作用触发挥发性饱和液体成核的现象。通过结合实验室实验、理论分析和数值模拟，他们研究了在挥发性过饱和液体中，机械剪切能量促进气体分子核形成与生长的条件。结果表明，成核所需的临界剪切应力随挥发性过饱和度的增加而降低。对自然系统进行的维数分析表明，剪切诱导成核很可能发生在火山通道中，这对理解岩浆脱气过程与喷发模式具有重要意义。

附：英文原文

Title: Shear-induced bubble nucleation in magmas

Author: Olivier Roche, Jean-Michel Andanson, Alain Dequidt, Christian Huber, Olivier Bachmann, David Pinel

Issue&Volume: 2025-11-06

Abstract: The nucleation of gas bubbles in magmas is fundamental to controlling the dynamics of volcanic eruptions. In this study, we addressed nucleation in a volatile-saturated liquid triggered by viscous shear, which is ubiquitous in volcanic environments. By combining laboratory experiments, theoretical analysis, and numerical simulations, we investigated the conditions under which the mechanical energy associated with shearing favors the formation and growth of gas molecule nuclei in a liquid supersaturated with volatiles. Our results reveal that the critical shear stress for nucleation decreases as the volatile supersaturation increases. Dimensional analysis applied to natural systems shows that shear-induced nucleation is likely to occur in volcanic conduits, which has implications for magma degassing processes and eruptive styles.

DOI: adw8543

Source: https://www.science.org/doi/10.1126/science.adw8543