Deep fluid pathways beneath Mammoth Mountain, California, illuminated by migrating earthquake swarms

Science Advances
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Abstract

Although most volcanic seismicity is shallow (within several kilometers of the surface), some volcanoes exhibit deeper seismicity (10 to 30+ km) that may reflect active processes such as magma resupply and volatile transfer. One such volcano is Mammoth Mountain, California, which has also recently exhibited high rates of CO2 discharge at the surface. We perform high-resolution earthquake detection and relocation to reveal punctuated episodes of rapidly propagating seismicity at mid-crustal depths along a narrow fracture zone surrounding a body of partial melt. We infer that these earthquakes track dike intrusions or fluid pressure pulses associated with CO2 exsolution, suggesting that the deep plumbing system of Mammoth Mountain is an active conduit for fluid transport from the base of the crust to the surface.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Deep fluid pathways beneath Mammoth Mountain, California, illuminated by migrating earthquake swarms
Series title Science Advances
DOI 10.1126/sciadv.aat5258
Volume 4
Issue 8
Year Published 2018
Language English
Publisher American Association for the Advancement of Science
Contributing office(s) Volcano Science Center
Description eaat5258; 7 p.
First page 1
Last page 7
Country United States
State California
Other Geospatial Mammoth Mountain