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Using Chemical Affinities to Understand Disequilibrium Textures of Plagioclase Preserved in Magmatic Systems 期刊论文
Geophysical Research Letters, 2021
作者:  Ellyn G. Huggins;  Philipp Ruprecht;  Mark S. Ghiorso
收藏  |  浏览/下载:4/0  |  提交时间:2021/05/21
New Geology articles published online ahead of print in January 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:15/0  |  提交时间:2021/02/10
The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge 期刊论文
Geophysical Research Letters, 2020
作者:  Philipp Ruprecht;  Adam C. Simon;  Adrian Fiege
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/14
Extreme rainfall triggered the 2018 rift eruption at Kilauea Volcano 期刊论文
NATURE, 2020, 580 (7804) : 491-+
作者:  Cloutier, Richard;  Clement, Alice M.;  Lee, Michael S. Y.;  Noel, Roxanne;  Bechard, Isabelle;  Roy, Vincent;  Long, John A.
收藏  |  浏览/下载:33/0  |  提交时间:2020/05/13

The May 2018 rift intrusion and eruption of Kilauea Volcano, Hawai'  i, represented one of its most extraordinary eruptive sequences in at least 200 years, yet the trigger mechanism remains elusive(1). The event was preceded by several months of anomalously high precipitation. It has been proposed that rainfall can modulate shallow volcanic activity(2,3), but it remains unknown whether it can have impacts at the greater depths associated with magma transport. Here we show that immediately before and during the eruption, infiltration of rainfall into Kilauea Volcano'  s subsurface increased pore pressure at depths of 1 to 3 kilometres by 0.1 to 1 kilopascals, to its highest pressure in almost 50 years. We propose that weakening and mechanical failure of the edifice was driven by changes in pore pressure within the rift zone, prompting opportunistic dyke intrusion and ultimately facilitating the eruption. A precipitation-induced eruption trigger is consistent with the lack of precursory summit inflation, showing that this intrusion-unlike others-was not caused by the forceful intrusion of new magma into the rift zone. Moreover, statistical analysis of historic eruption occurrence suggests that rainfall patterns contribute substantially to the timing and frequency of Kilauea'  s eruptions and intrusions. Thus, volcanic activity can be modulated by extreme rainfall triggering edifice rock failure-a factor that should be considered when assessing volcanic hazards. Notably, the increasingly extreme weather patterns associated with ongoing anthropogenic climate change could increase the potential for rainfall-triggered volcanic phenomena worldwide.


Immediately before and during the eruption of Ki & x304  lauea Volcano in May 2018, anomalously high rainfall increased the pore pressure in the subsurface to its highest level in 50 years, causing weakening and mechanical failure of the edifice.


  
Investigating Fine-Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast-Spreading Ridge (the East Pacific Rise, 9 degrees 43 '-53 ' N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (21) : 11799-11810
作者:  Marjanovic, Milena;  Barreyre, Thibaut;  Fontaine, Fabrice J.;  Escartin, Javier
收藏  |  浏览/下载:5/0  |  提交时间:2020/02/17
mid-ocean ridges  East Pacific Rise  hydrothermal circulation  crustal permeability  numerical modeling  
Ca isotopes record rapid crystal growth in volcanic and subvolcanic systems 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (41) : 20315-20321
作者:  Antonelli, Michael A.;  Mittal, Tushar;  McCarthy, Anders;  Tripoli, Barbara;  Watkins, James M.;  DePaolo, Donald J.
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
Ca isotopes  volcanic eruptions  magma recharge  crystal growth  timescales  
Optimal depth of subvolcanic magma chamber growth controlled by volatiles and crust rheology 期刊论文
NATURE GEOSCIENCE, 2019, 12 (9) : 762-+
作者:  Huber, Christian;  Townsend, Meredith;  Degruyter, Wim;  Bachmann, Olivier
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
Research shows why there's a 'sweet spot' depth for underground magma chambers 新闻
来源平台:EurekAlert! - Earth Science. 发布日期:2019
作者:  admin
收藏  |  浏览/下载:0/0  |  提交时间:2019/09/19
Thermal Evolution of the Impact-Induced Cryomagma Chamber Beneath Occator Crater on Ceres 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (3) : 1213-1221
作者:  Hesse, M. A.;  Castillo-Rogez, J. C.
收藏  |  浏览/下载:1/0  |  提交时间:2019/11/26
Deep low-frequency earthquakes indicate migration of magmatic fluids beneath Laacher See 新闻
来源平台:EurekAlert! - Earth Science. 发布日期:2019
作者:  admin
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/17