Volcano Questions

Magma feeding the volcano's magma chamber comes from the highly pressurized
outer core, which is a liquid composed of metals and reduced silicon. The
pressure is resultant of the burden above the outer core and the force of
gravity, I believe. Pressure acts in 360 degrees, so the liquid material in
the outer core will find the point of least resistance, and begin to migrate
out of the outer core towards the surface. When it erupts onto the surface
of either a continental plate or a oceanic plate, it becomes a volcano,
spitting out lava. The process of the magma making it's way towards the
surface along conduits like faults, fissures, etc. will cause tectonic
activity, by the magma placing force on existing plates/structures already
in some stressful situation, due to existing tectonic activity. This
results in earthquakes, which is why earthquakes or seismic events proceed
most (if not all) volcanic eruptions.



Not all volcanoes explode onto the surface, some just ooze or flow out,
after breaking through the surface. Some blow a small chunk of the mountain
away and then just flow lava down the sides of the mountain. What causes a
volcano to explode in a massive, violent eruption, sending million of tons
of debris into the air? Does magma build up in a chamber (magma chamber)
until some event triggers a explosive eruption?



And further, it appears to me that as billions of cubic feet of magma are
discharged from the outer core, that those continental and oceanic crusts
being assimilated into the mantle would in turn cause some of the mantle to
be assimilated into the outer core, since there must be a material balance,
mass is not being created in the core, and it is not a empty hole after
discharging magma. I would think the material balance of the outer core has
remained relatively the same for most of the 4.7 billion years the planet
has been here, which means something must replace what is belched out in
volcanoes over the years. Gravity would tend to cause the dense metals
(nickel, iron cobalt, etc.) to be drawn into the outer core, along with
other material "along for the ride".


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Relevant Pages

  • Re: Volcano Questions
    ... ago), but the graphics were so good, I can't forget the one showing the ... magma coming from the outer core. ... I guess I need to find another image of a volcano to replace ...
    (sci.geo.geology)
  • Re: Volcano Questions
    ... The pressure is resultant of the burden above the outer core and the force of gravity, ... When it erupts onto the surface of either a continental plate or a oceanic plate, it becomes a volcano, spitting out lava. ... The process of the magma making it's way towards the surface along conduits like faults, fissures, etc. will cause tectonic activity, by the magma placing force on existing plates/structures already in some stressful situation, due to existing tectonic activity. ...
    (sci.geo.geology)
  • Re: Volcano Questions
    ... pressurized outer core, which is a liquid composed of metals and reduced ... erupts onto the surface of either a continental plate or a oceanic plate, ... The process of the magma making ... What causes a volcano to explode in a massive, violent eruption, sending ...
    (sci.geo.geology)
  • Re: Volcano Questions
    ... presentation on a upcoming project that they wanted funded. ... , but the graphics were so good, I can't forget the one ... showing the magma coming from the outer core. ...
    (sci.geo.geology)
  • Re: Watching Redoubts Webicorder
    ... winter time and near the sea, the pressure ... moving magma. ... And here is NOAA's SSD volcano products page (Redoubt isn't on there ...
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