Results 241 to 250 of about 143,639 (273)
LDAK-PBAT: A Pathway-Based Analysis Tool for Decoding the Genetics of Complex Diseases
Berrandou T, Speed D.
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The dynamics of magma mixing in a rising magma batch [PDF]
Bulletin Of Volcanology, 1989 The conditions under which two magmas can become mixed within a rising magma batch are investigated by scaling analyses and fluid-dynamical experiments. The results of scaling analyses show that the fluid behaviours in a squeezed conduit are determined mainly by the dimensionless number
Stephen Blake, Takehiro Koyaguchi
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Properties of the Magma and Modified Magma Equations
Journal of the Physical Society of Japan, 1990Solutions of the “magma equation”, f t =[ f n {( f - m f t ) x -1}] x , are investigated for compact support initial conditions. It is shown analytically that traveling wave solutions with compact support do not exist for this equation. Numerical integration demonstrates that although initial conditions with compact support produce solitary waves ...
Jeffrey R. Sachs +2 more
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Magma supply, magma ascent and the style of volcanic eruptions
Earth and Planetary Science Letters, 2007Abstract We propose a new way of looking at the sequence of events leading to different styles of silicic, volcanic eruptions. Small-to-medium sized eruptions, either explosive or effusive, are explained by the ascent of isolated magma batches from mid-crustal magma chambers.
SCANDONE, Roberto +2 more
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Annual Review of Earth and Planetary Sciences, 1989
The major divisions of the Earth have come about largely by magmatic processes giving rise to a vast variety of distinctive rocks making up the crust, mantle, and core. The process by which this happens is called differentiation and it mainly occurs through the separation of crystals from melt in places where magma collects in sills, dikes, and lava ...
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The major divisions of the Earth have come about largely by magmatic processes giving rise to a vast variety of distinctive rocks making up the crust, mantle, and core. The process by which this happens is called differentiation and it mainly occurs through the separation of crystals from melt in places where magma collects in sills, dikes, and lava ...
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Nature, 1999
Explosive eruptions of volcanoes, such as that which destroyed Pompeii, are especially threatening to neighbouring human populations. Understanding of this type of eruption is still at an early stage, although it is clear that fragmentation of magma in the conduit inside the volcano is a key process. New models of magma fragmentation provide improved —
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Explosive eruptions of volcanoes, such as that which destroyed Pompeii, are especially threatening to neighbouring human populations. Understanding of this type of eruption is still at an early stage, although it is clear that fragmentation of magma in the conduit inside the volcano is a key process. New models of magma fragmentation provide improved —
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Magmas in collision: Rethinking chemical zonation in silicic magmas
Geology, 2000The heterogeneity of eruptions attributed to protracted fractionation in subvolcanic magma chambers may instead result from chamber recharge. The case of mafic magma intruding andesitic slush is recognized as giving rise to hybrid effusive eruptions such as at Unzen volcano, Japan, and Soufriere Hills volcano, Montserrat. We propose that zoned andesite-
Christopher J. Nye +3 more
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Elements, 2010
Sulfur is a ubiquitous element whose variable valence states (S2−, S, S4+, S6+) allow it to participate in a wide variety of geochemical and biogeochemical processes. Depending on its redox state and controlling species, sulfur dissolved in magma may be fractionated into a water-rich phase and sulfur-bearing minerals.
Charles W. Mandeville, Nicole Métrich
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Sulfur is a ubiquitous element whose variable valence states (S2−, S, S4+, S6+) allow it to participate in a wide variety of geochemical and biogeochemical processes. Depending on its redox state and controlling species, sulfur dissolved in magma may be fractionated into a water-rich phase and sulfur-bearing minerals.
Charles W. Mandeville, Nicole Métrich
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