Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8907
Authors: | Montagna, C. P.* Gonnermann, H. M.* |
Title: | Magma flow between summit and Pu‘u ‘O‘o at Kılauea Volcano, Hawai‘i | Journal: | Geochemistry, Geophysics, Geosystems | Series/Report no.: | 7/14 (2013) | Publisher: | American Geophysical Union | Issue Date: | 29-Jul-2013 | DOI: | 10.1002/ggge.20145 | Keywords: | magma flow dikes Kilauea elastic rock magma-rock coupling |
Subject Classification: | 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous | Abstract: | Volcanic eruptions are often accompanied by spatiotemporal migration of ground deformation, a consequence of pressure changes within magma reservoirs and pathways. We modeled the propagation of pressure variations through the east rift zone (ERZ) of K" ılauea Volcano, Hawai‘i, caused by magma " o-Kupaianaha withdrawal during the early eruptive episodes (1983–1985) of the ongoing Pu‘u ‘ O‘" " eruption. Eruptive activity at the Pu‘u ‘ O‘" o vent was typically accompanied by abrupt deflation that lasted for several hours and was followed by a sudden onset of gradual inflation once the eruptive episode had ended. Similar patterns of deflation and inflation were recorded at K" ılauea’s summit, approximately 15 km to the northwest, albeit with time delays of hours. These delay times can be reproduced by modeling the spatiotemporal changes in magma pressure and flow rate within an elastic-walled dike that traverses K" ılauea’s ERZ. Key parameters that affect the behavior of the magma-dike system are the dike dimensions, the elasticity of the wall rock, the magma viscosity, and to a lesser degree the magnitude and duration of the pressure variations themselves. Combinations of these parameters define a transport efficiency and a pressure diffusivity, which vary somewhat from episode to episode, resulting in variations in delay times. The observed variations in transport efficiency are most easily explained by small, localized changes to the geometry of the magma pathway |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
montagna_gonnermann_g3_2013.pdf | 2.87 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
10
checked on Jan 22, 2021
Page view(s)
261
checked on Mar 27, 2024
Download(s)
17
checked on Mar 27, 2024