ISSN:
1432-0819
Keywords:
Key words Mogi
;
Dislocations
;
Deformation
;
Magma compressibility
;
Kīlauea
;
Gravity variations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract In volcanoes that store a significant quantity of magma within a subsurface summit reservoir, such as Kīlauea, bulk compression of stored magma is an important mode of deformation. Accumulation of magma is also accompanied by crustal deformation, usually manifested at the surface as uplift. These two modes of deformation – bulk compression of resident magma and deformation of the volcanic edifice – act in concert to accommodate the volume of newly added magma. During deflation, the processes reverse and reservoir magma undergoes bulk decompression, the chamber contracts, and the ground surface subsides. Because magma compression plays a role in creating subsurface volume to accommodate magma, magma budget estimates that are derived from surface uplift observations without consideration of magma compression will underestimate actual magma volume changes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004450050006
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