In situ confirmation of permeability development in shearing bubble-bearing melts and implications for volcanic outgassing

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• 作者：Alexandra R.L. Kushnir ; ^{alexandra.kushnir@gmail.com} ; Caroline Martel ; Ré ; mi Champallier ; Laurent Arbaret
• 关键词：Mode I fractures ; torsion ; magma ; outgassing ; experiments
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：458
• 期：Complete
• 页码：315-326
• 全文大小：2659 K
• 卷排序：458

文摘

Magmas are deformed in simple shear at conditions pertinent to volcanic conduits Permeability develops during deformation at shear strain rates >2×10−4 s−1>2×10−4 s−1 Permeability is established via extension fractures, not bubble coalescence Extension fractures are efficient outgassing paths for the central magmatic column Permeability is greatest when brittle and viscous mechanisms act in tandem