Hydrothermal fluid migration due to interaction with shallow magma: Insights from gravity changes before and after the 2015 eruption of Cotopaxi volcano, Ecuador
作者： Antonina Calahorrano-Di Patre , Glyn Williams-Jones , Maurizio Battaglia , Patricia Mothes , Elizabeth Gaunt
DOI: 10.1016/J.JVOLGEORES.2019.106667
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摘要: Abstract On August 14, 2015 Cotopaxi Volcano (Ecuador) erupted with several phreatomagmatic explosions after nearly 135 years of quiescence. Unrest began in April an increase the number daily seismic events and inflation flanks volcano. Time-lapse gravity measurements started at volcano June 2015. Although minor changes were detected prior to eruptive activity, largest variations measured between October March 2016, when other geophysical parameters had reached background levels. Inverse modelling GPS data suggests a deep intrusion while inverse post-eruptive hydrothermal system. Deformation, seismicity, are consistent magmatic source Part magma rose from depth interacted system, causing activity pushing fluids aquifer into shallow perched aquifer.
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