In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts
In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts
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DOI：
10.1007/s00410-014-0976-8
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发表时间：
2014-02-01
影响因子：
3.5
通讯作者：
Keppler, H.
中科院分区：
文献类型：
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作者：
Masotta, M.;Ni, H.;Keppler, H.
气泡的生长强烈影响脱气岩浆的物理特性及其喷发动力学。来自淬灭实验的天然样品和产物仅提供挥发性溶出的最终状态的快照，使得早期阶段发生的过程不受限制。为了填补这一空白，我们使用莫桑石电池装置在 1,100 至 1,240 摄氏度和 0.1 MPa (1 bar) 下对不同成分（玄武岩、安山岩和流英安岩）的岩浆中气泡生长进行了原位高温观测。数据表明，成核发生在非常小的过饱和度下（
Bubble growth strongly affects the physical properties of degassing magmas and their eruption dynamics. Natural samples and products from quench experiments provide only a snapshot of the final state of volatile exsolution, leaving the processes occurring during its early stages unconstrained. In order to fill this gap, we present in situ high-temperature observations of bubble growth in magmas of different compositions (basalt, andesite and rhyodacite) at 1,100 to 1,240 degrees C and 0.1 MPa (1 bar), obtained using a moissanite cell apparatus. The data show that nucleation occurs at very small degrees of supersaturaturation (