GSTDTAP  > 气候变化
DOI10.1029/2021GL095175
The role of tuffs in sealing volcanic conduits
Shreya Kanakiya; Ludmila Adam; Michael C. Rowe; Jan M. Lindsay; Lionel Esteban
2021-10-01
发表期刊Geophysical Research Letters
出版年2021
英文摘要

Acid-sulfate alteration commonly changes the physicochemical properties of volcanic conduits. Although several conduit pressurization models suggest hydrothermal sealing, little experimental evidence exists from conduit-filling rocks on the development of such a seal. Here we show that acid-sulfate alteration affects conduit-filling lavas and tuffs differently, with implications for their role in sealing the conduit. In lavas, alteration creates fluid pathways and decreases rock stiffness by dissolving primary minerals. In contrast, in the inherently porous tuffs, alteration reduces fluid pathways and increases rock stiffness by precipitating secondary minerals. Compaction of tuffs under subsurface pressures together with such alteration-related sealing can form low porosity and low permeability zones within the conduit. Such zones could promote fluid-pressure build-up and predispose the volcano to explosive eruptions. We discuss our results in the context of observed seismicity and ground deformation and suggest using our elastic properties data to constrain geophysical inversions of acid-sulfate altered volcanic conduits.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/338846
专题气候变化
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GB/T 7714
Shreya Kanakiya,Ludmila Adam,Michael C. Rowe,et al. The role of tuffs in sealing volcanic conduits[J]. Geophysical Research Letters,2021.
APA Shreya Kanakiya,Ludmila Adam,Michael C. Rowe,Jan M. Lindsay,&Lionel Esteban.(2021).The role of tuffs in sealing volcanic conduits.Geophysical Research Letters.
MLA Shreya Kanakiya,et al."The role of tuffs in sealing volcanic conduits".Geophysical Research Letters (2021).
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