...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Gas accumulation in particle-rich suspensions and implications for bubble populations in crystal-rich magma
【24h】

Gas accumulation in particle-rich suspensions and implications for bubble populations in crystal-rich magma

机译：富含晶体的岩浆中气体在富颗粒悬浮液中的积累及其对气泡总数的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Gas mobility plays an important role in driving volcanic eruptions and controlling eruption style. The explosivity of an eruption depends, among other factors, on how easily gas can escape from the magma. Many magmatic systems have high concentrations of suspended crystals that inhibit gas migration through the melt. We use suspensions of plastic beads in corn syrup to investigate interactions between rising bubbles and particles. We observe different interaction styles as the ratio ψ of bubble to particle size is varied. Large bubbles (ψ >1) deform and sometimes break up as they move around particles. Small bubbles (ψ <1) are frequently trapped within the suspension, increasing the concentration of gas held within the system. We compare our experiments to bubble populations in tephra from Stromboli volcano, Italy. We show that these samples typically have bubbles and crystals of similar sizes and suggest that crystals might play a role in controlling bubble size in this natural system as well as in our experiments. Because small bubbles (ψ <1) get trapped within the suspension, and can be formed by breakup of larger bubbles, we expect that an increase in gas flux will result in an increase in the population of small bubbles. Changes in bubble number density and vesicularity in tephra erupted during periods of different eruptive intensity may thus provide a way of tracking changes in gas flux through the magma prior to eruption.
机译：气体流动性在驱动火山喷发和控制火山喷发方式中起着重要作用。喷发的爆炸性除其他因素外，还取决于气体从岩浆中逸出的难易程度。许多岩浆系统具有高浓度的悬浮晶体，抑制了气体通过熔体的迁移。我们使用玉米糖浆中塑料珠的悬浮液来研究上升的气泡和颗粒之间的相互作用。随着气泡与粒径之比ψ的变化，我们观察到不同的相互作用方式。大气泡（ψ> 1）会变形，有时会随着在粒子周围移动而破裂。小气泡（ψ<1）经常被困在悬浮液中，从而增加了系统中所含气体的浓度。我们将实验与意大利斯特龙博利火山的特非拉中的气泡种群进行了比较。我们显示这些样品通常具有类似大小的气泡和晶体，并暗示晶体可能在控制这种天然系统以及我们的实验中的气泡大小中起作用。由于小气泡（ψ<1）被截留在悬浮液中，并且可以通过较大气泡的破裂而形成，因此我们预计气体通量的增加将导致小气泡的数量增加。因此，在不同喷发强度期间喷发的特非拉中气泡数密度和囊泡的变化可提供一种在喷发之前跟踪通过岩浆的气体通量变化的方式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号