Results 221 to 230 of about 23,662 (266)

Dynamics of Magma Chambers

1993
Discussed herein are three major issues of debate regarding the dynamics of magma chambers: I. whether or not crystal settling is important II. whether or not magma densities drop during fractionation, and III. whether there is a Soret effect.
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Eruptions from zoned magma chambers

Journal of the Geological Society, 1981
SUMMARY: An appreciation of the positions within a magma chamber from which magma will be erupted can be gained from an understanding of the pattern of magma removal. Upwardly converging streamlines followed by a fluid escaping from a flat-topped reservoir into a cylindrical conduit cause magma from widely separated horizontal and vertical
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Simulation of Layered Magma Chambers

Journal of Geological Education, 1991
The principles of magma addition and liquid layering in magma chambers can be simply demonstrated in the laboratory by dissolving colored crystals. The concepts of density stratification and apparent lack of mixing of miscible liquids is convincingly illustrated with hydrous solutions at room temperature.
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Crypto-magma chambers beneath Mt. Fuji

Journal of Volcanology and Geothermal Research, 2010
Abstract Mt. Fuji consists dominantly of basalt. A study of olivine-hosted melt-inclusions from layers of air-fall scoria, however, shows clear evidence of andesitic liquids. Whole rock compositions show a narrow range of SiO2, but a wide range of FeO*/MgO and incompatible elements.
Takayuki Kaneko, Atsushi Yasuda, Toshitsugu Fujii, Mitsuhiro Yoshimoto   +3 more
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Volcanoes, Volcanic Rocks and Magma Chambers

1984
Volcanoes are hills, mounds or sheets of relatively localized igneous rock assemblages made up of pyroclastic rocks, lava flows, and intrusions in varying proportions. Volcanoes differ notably in their geometry, volume, and relative amounts of pyroclastic rocks and lava flows, with differences mostly dependent upon eruptive mechanisms and rates of ...
Richard V. Fisher, Hans-Ulrich Schmincke
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Convection and Macrosegregation in Magma Chambers

1992
Magmas accumulate in large reservoirs where convection occurs, driven by density differences due to fractional crystallization and temperature variations. The observations consist of igneous rocks representing the final crystallized product and volcanic lava series.
S. R. Tait, C. Jaupart
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Slimline magma chambers

Nature, 1992
Sherman Bloomer, Peter Meyer
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Fountains in Magma Chambers

Journal of Petrology, 1989
I. H. CAMPBELL, J. S. TURNER
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Magma Chambers

Annual Review of Earth and Planetary Sciences, 1989
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No single model for supersized eruptions and their magma bodies

Nature Reviews Earth & Environment, 2021
Colin J N Wilson, George F Cooper, Katy J Chamberlain   +2 more
exaly