Magma fragmentation by rapid decompression
Article Abstract:
A laboratory investigation of pyroclast formation following rapid decompression showed the fragmentation of magma samples from the 1980 eruption of Mount St. Helens to form pyroclastic products that are similar to those formed in real eruptions in many aspects. This fragmentation occurred upon rapid depressurization of the samples from initial pressures of up to 12 MPa. The explosive fragmentation of the samples at temperatures well below those normally associated with magmatic processes was also noted. This indicates that rapid unloading events can make even relatively cool magma bodies hazardous.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Explosive fragmentation of erupting magma
Article Abstract:
Simulation of magma eruption process by depressurization experiments on a two-phase system reveals a novel explosive vaporization process in magma eruption. In this process, the growth of nucleated bubble is inhibited by a fragmentation front, which compresses the material ahead of the bubble by propagating downward via a mixture of inert particulate material and volatile liquid. This process is complementary but distinct from other fragmentation mechanisms.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Granite magma formation transport and emplacement in the Earth's crust
Article Abstract:
New research examines the physical processes that control the transportation of granitic melts from their source, through the Earth's crust, until they are emplaced in pre-existing rock.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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