Influence of non-Newtonian rheology on magma degassing
نویسندگان
چکیده
منابع مشابه
Influence of non-Newtonian rheology on magma degassing
Many volcanoes exhibit temporal changes in their degassing process, from rapid gas puffing to lava fountaining and long-lasting quiescent passive degassing periods. This range of behaviors has been explained in terms of changes in gas flux and/or magma input rate. We report here a simple laboratory experiment which shows that the nonNewtonian rheology of magma can be responsible, alone, for suc...
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1023 ABSTRACT The rheology of twoor three-phase magmas has been the focus of much interest because it controls magma ascent and eruption behavior. Research on magma rheology has typically considered homogeneous fl ow. Here we demonstrate, based on natural examples, that strain resulting from viscous fl ow preceding explosive fragmentation localizes into shear zones at a microscopic scale. Strai...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2011
ISSN: 0094-8276
DOI: 10.1029/2011gl047789