| DOI: | 10.1002/2016GL070532
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| 论文题名: | Cooling-dominated cracking in thermally stressed volcanic rocks |
| 作者: | Browning J.; Meredith P.; Gudmundsson A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8714
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| EISSN: | 1944-8445
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| 出版年: | 2016
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| 卷: | 43, 期:16 | | 起始页码: | 8417
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| 结束页码: | 8425
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| 语种: | 英语
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| 英文关键词: | acoustic emission
; cooling joints
; thermal cracking
; thermal stress
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| Scopus关键词: | Acoustic emissions
; Cooling
; Cracking (chemical)
; Cracks
; Heating
; Thermal expansion
; Thermal stress
; Volcanic rocks
; Volcanoes
; Acoustic emission data
; Crack morphology
; Heating and cooling
; Induced damage
; Seismic velocities
; Thermal cracking
; Thermally induced
; Volcanic structures
; Acoustic emission testing
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| 英文摘要: | Most studies of thermally induced cracking in rocks have focused on the generation of cracks formed during heating and thermal expansion. Both the nature and the mechanism of crack formation during cooling are hypothesized to be different from those formed during heating. We present in situ acoustic emission data recorded as a proxy for crack damage evolution in a series of heating and cooling experiments on samples of basalt and dacite. Results show that both the rate and the energy of acoustic emission are consistently much higher during cooling than during heating. Seismic velocity comparisons and crack morphology analysis of our heated and cooled samples support the contemporaneous acoustic emission data and also indicate that thermal cracking is largely isotropic. These new data are important for assessing the contribution of cooling-induced damage within volcanic structures and layers such as dikes, sills, and lava flows. ©2016. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982281721&doi=10.1002%2f2016GL070532&partnerID=40&md5=abe6520052850dee76cd17acfd6c3d33
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9677
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Earth Sciences, University College London, London, United Kingdom
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| Recommended Citation: | |
Browning J.,Meredith P.,Gudmundsson A.. Cooling-dominated cracking in thermally stressed volcanic rocks[J]. Geophysical Research Letters,2016-01-01,43(16).
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