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氧化物纳米化诱导的铁提取导致粘度跳跃,并在性岩中增强爆炸性

Francisco Cáceres^1,2, Kai-Uwe Hess³, Michael Eitel³

¹Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität (LMU) München, Theresienstr. 41, 80333, Munich, Germany. francisco.caceres@min.uni-muenchen.de.

Nature communications

|January 19, 2024

概括

火山爆发的爆炸性与岩粘度有关. 氧化物纳米石的快速结晶通过从融中提取铁,显著增加了岩粘度,可能导致爆炸性喷发.

科学领域:

火山学火山学是一门学科.
地质化学地质化学
材料科学材料科学材料科学

背景情况:

火山爆发的爆炸性取决于岩脱气和粘度.
岩结晶,包括纳米石的形成,增加粘度,但确切的机制尚不清楚.

研究的目的:

实验性地研究自然性岩中的快速纳米石结晶.
为了量化由此产生的岩体粘度的增加.
为了确定粘度增强的主要原因.

主要方法:

热处理天然石岩 (无纳米石和含纳米石) 的热处理.
氧化纳米石结晶和再结晶的观察.
测量粘度变化的测量.

主要成果:

氧化物纳米石的结晶导致了岩体粘度增加一个数量级.
粘度的增加主要是由于铁从化阶段通过纳米质的提取.
微粒悬浮对粘度的物理影响是可以忽略不计的.

结论:

氧化物纳米石结晶显著提高了岩的粘度.
这种粘度的增加,由融化阶段的变化驱动,足以影响岩碎片化.
这些发现为对爆炸性火山爆发的控制提供了关键的见解.

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