From this, they were able to get "pretty convincing evidence" that the ferrous iron and its resulting chemical breakdown in magma
oceans could have helped jumpstart the oxygen in our atmosphere, back in its early days.
In the case of the Luenha picrites, named after the research area near the Luenha River, the geochemical compositions indicate a hot magma
source that is in many respects different from previously reported magma
sources in the Karoo province.
To calculate how long the magma
was stored at this boundary area, the researchers used a volcanic mineral known as spinel like a tiny stopwatch or crystal clock.
These terms refer to the ways the layers of magma
either drip or rocket from the inner Earth and then harden to create the various volcano shapes.
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"The process we discuss is essential not only to develop resurgence, but also for the formation of the magma
reservoirs responsible for the largest eruptions on Earth," researcher Valerio Acocella said.
It will be ground-breaking to be able to monitor the magma
body itself and understand more about the environment down there.
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Dr Ubide said: "Just as investigators reconstruct events to learn the truth, we prise magma
injections from the crystals that are transported to the surface by erupted magmas
to do the same thing.
If the scientists are right, there is enough magma
inside to fill the Grand Canyon more than 11 times!
"The ground deformation survey indicated that there's magma
ascending at the crater.