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DOI | 10.1029/2020GL089025 |
Host Rock Variability Powers the Diversity of Steam‐Driven Eruptions | |
Cristian Montanaro; Shane J. Cronin; Bettina Scheu; Ben Kennedy; Bradley J. Scott; Donald B. Dingwell | |
2020-12-08 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Steam‐driven eruptions are explosive events that are fueled by pressurized water and steam trapped within rock and sediments. We show how rock properties modulate explosion size, dynamics and hazard footprint based on examples from Lake Okaro (New Zealand). Laboratory decompression experiments demonstrate that fragmentation of strong/unaltered host rocks comes with a high energy cost (∼10‐11% of bulk explosion energy). Consequently a low energy fraction (∼7‐8%) remains for kinetic energy and thus particle ejection. In contrast, disaggregation of unconsolidated sediments requires little energy (<2–7%), allowing higher outputs of kinetic energy (22–25%), and more efficient debris dispersion. Experimental estimates of bulk explosive energies are consistent with both field observations and empirical models applied to Lake Okaro crater dimensions. This integration of experimental methods, field observations, and empirical modelling underscores the dominant role of alteration state and host rock lithology when estimating crater‐forming and ballistic hazards in volcanic/geothermal areas. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308261 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Cristian Montanaro,Shane J. Cronin,Bettina Scheu,等. Host Rock Variability Powers the Diversity of Steam‐Driven Eruptions[J]. Geophysical Research Letters,2020. |
APA | Cristian Montanaro,Shane J. Cronin,Bettina Scheu,Ben Kennedy,Bradley J. Scott,&Donald B. Dingwell.(2020).Host Rock Variability Powers the Diversity of Steam‐Driven Eruptions.Geophysical Research Letters. |
MLA | Cristian Montanaro,et al."Host Rock Variability Powers the Diversity of Steam‐Driven Eruptions".Geophysical Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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