The evolution of lava flow-fields: observations of the 1981 and 1983 eruptions of Mount Etna, Sicily
The evolution of lava flow-fields: observations of the 1981 and 1983 eruptions of Mount Etna, Sicily
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熔岩流场的演变：西西里岛埃特纳火山 1981 年和 1983 年喷发的观测
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
A. Duncan
中科院分区：
文献类型：
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作者：
J. Guest;C. Kilburn;H. Pinkerton;A. Duncan
1981年埃特纳火山在其北侧和1983年在其南侧的喷发具有截然不同的特征。前者是一个持续时间短，高渗出率喷发生产的大部分是一个简单的流场，后者是相对较长的持续时间和低渗出率，产生一个复合流场重叠flow.Supply之间的差异，这两个事件的喷发行为和流场的发展方式，这两个流场实现了大约相同的最大长度。这被认为是偶然的。证据表明，1981年的主要流动停止，因为熔岩供应停止，因此体积受到控制。1983年的流场有一个更复杂的分支历史，但在这种情况下，似乎对于最长的单个流，冷却在控制流的最大范围方面起着重要作用。
The eruptions of Mount Etna in 1981 on the north flank and 1983 on the south flank of the volcano were of strikingly different character. The former was a short duration, high effusion rate eruption producing for the most part a simple flow-field; the latter was of relatively long duration and low effusion rate, producing a compound flow-field of overlapping flows.Despite the differences between the eruptive behaviour of these two events and the way in which the flow-field developed, both the flow-fields achieved about the same maximum length. This is considered fortuitous. The evidence suggests that the main 1981 flow stopped because the lava supply ceased and was thus volume controlled. The 1983 flow-field had a more complex history of branching, but in this case it appears that, for the longest individual flow, cooling played an important role in controlling the maximum extent of the flows.