Results 171 to 180 of about 510,795 (213)

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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Temperatures of entering magma, formation and dimensions of magma chambers of volcanoes

Bulletin Volcanologique, 1982
A mechanism, of formation of magma chambers that feed volcanoes is discussed. Heat conditions and dimensions of magma chambers which have existed for more than several thousand years may become stable. The approximate equations of heat balance of these chambers are derived by calculating the temperatureT1 of the magma entering chambers and the radiia ...
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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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Formation of crystal magma chambers in Iceland

Geology, 1986
Formation of crustal magma chambers in Iceland may be facilitated by the occurrence of stress barriers that lead to formation of thick sills. Such sills absorb the magma of all dikes that enter them and may evolve into magma chambers. Ideal sites for stress barriers, and hence for magma chambers, are rock formations where individual layers have ...
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Fountains in Magma Chambers

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

Science, 1981
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Slimline magma chambers

Nature, 1992
Sherman Bloomer, Peter Meyer
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Zoned magma chambers: the influence of magma chamber geometry on sidewall convective fractionation

Journal of Volcanology and Geothermal Research, 1995
S.L.de Silva, J.A. Wolff
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Magma Chambers

Annual Review of Earth and Planetary Sciences, 1989
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Magmatism, Magma, and Magma Chambers

2007
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