The Influence of Phenocrysts on Degassing in Crystal‐Bearing Magmas With Rhyolitic Groundmass Melts
The Influence of Phenocrysts on Degassing in Crystal‐Bearing Magmas With Rhyolitic Groundmass Melts
复制标题
斑晶对晶体脱气的影响——含流纹岩质熔体的岩浆
DOI:
10.1029/2018gl081822
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发表时间:
2019
影响因子:
5.2
通讯作者:
Cashman, K. V.
中科院分区:
文献类型:
--
作者:
deGraffenried, R. L.;Larsen, J. F.;Graham, N. A.;Cashman, K. V.
The porosity at which a magma becomes permeable (i.e., the percolation threshold;ϕc) is important for magma degassing; it is also poorly constrained in crystal‐bearing systems. To address this, we conduct high pressure‐temperature decompression experiments on water‐saturated rhyolitic melts with variable crystal contents. We find that crystal‐bearing run products become permeable at ~55‐vol.% vesicularity (crystal free), a value that is similar to that found in decompression‐crystallization experiments using basaltic andesite compositions. Our results provide insight into controls on the eruption styles of hydrous, crystal‐bearing magmas in general and controls on pulsatory Vulcanian behavior, in particular.
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影响因子:
3.5
作者:
S. J. Isgett;B. Houghton;S. Fagents;S. Biass;A. Burgisser;L. Arbaret
通讯作者:
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影响因子:
5.2
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DOI:
--
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2015
期刊:
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通讯作者:
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DOI:
--
发表时间:
2012
期刊:
影响因子:
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