Supereruption quartz crystals and the hollow reentrants
Supereruption quartz crystals and the hollow reentrants
复制标题
超级喷发石英晶体和空心折返体
DOI:
10.1130/g46275.1
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发表时间:
2019
期刊:
影响因子:
5.8
通讯作者:
Manga, Michael
中科院分区:
文献类型:
--
作者:
Befus, Kenneth S.;Manga, Michael
Hollow reentrants in quartz phenocrysts from Yellowstone (western United States) caldera’s Lava Creek Tuff are preserved vestiges of bubbles in the supereruption’s pre-eruptive magma reservoir. We characterized the reentrants using a combination of petrographic techniques, synchrotron X-ray microtomography, and cathodoluminescence imagery. One or more reentrants occur in ∼20% of quartz, and up to ∼90% of those reentrants are hollow. The earliest-erupted parts of the Lava Creek Tuff have the most empty reentrants. The hollow reentrants provide direct, physical evidence for volatile saturation, exsolution, and retention in a magma reservoir. Quartz-melt surface tension permits bubbles to attach to quartz only when bubbles have been able to nucleate and grow in the melt. Prior to eruption, the Lava Creek Tuff existed as a bubbly, volatile-saturated magma reservoir. The exsolved volatiles increased magma compressibility, helping to prevent the ever-accumulating magma from reaching a critical, eruptive overpressure until it reached a tremendous volume.
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影响因子:
3.5
作者:
Ferguson, David J.;Gonnermann, Helge M.;Swanson, Donald A.
通讯作者:
Swanson, Donald A.
影响因子:
3.5
作者:
J. Gardner
通讯作者:
J. Gardner
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
G. Girard;J. Stix
通讯作者:
J. Stix
影响因子:
5.3
作者:
M. Myers;P. Wallace;C. Wilson;B. K. Morter;Elliot J. Swallow
通讯作者:
Elliot J. Swallow
影响因子:
4.1
作者:
James E. Gardner
通讯作者:
James E. Gardner