Release date- 26082019 - The origin of gigantic
magma eruptions that led to global climatic crises and extinctions of species has remained controversial.
Instead, the study suggests that volcanoes are fed by so-called 'mush reservoirs' -- areas of mostly solid crystals with
magma in the small spaces between the crystals.
Amazingly, the brains behind the breakthrough claim volcanoes are telling their own stories as their secrets are locked inside
magma crystals.
(2013) Primary
magmas at the volcanic front of the NE Japan arc: coeval eruption of crustal low-K tholeiitic and mantle-derived medium-K calc-alkaline basalts at Azuma Volcano.
The key, scientists say, is to elevate the temperature of the rock to more than 750 degrees Celsius, which can happen when hot
magma from deep within the Earth's crust rises to the surface.
This book is a collection of 12 papers that address four important issues in
magma evolution:
magma transfer from mantle to surface, dynamics of
magma transport,
magma reservoir dynamics and processes of silicic melt generation.
The low viscosity of the basaltic
magmas released in Hawaiian-style eruptions on these volcanoes (Fig.
"Pervasive" migration is the motion of
magma through an extensive network of channels.
As
magmas cool, crystals may accumulate on the floors, walls, and roofs of
magma chambers and form crystal mushes that initially contain 40 percent melt, but prior to solidification contain less than 15 percent trapped melt.
When mantle material melts to form
magma, it traps subsurface carbon.
Shergotty contains certain crystals that could only have formed if the
magma that makes up the rock was 2 percent water by weight.
In the Earth, such bodies of
magma tend to move towards the surface leading to volcanic eruptions.
