1. Super-eruptions occur when huge accumulations of magma formed over millions of years  Tech Explorist
  2. Timescales for pluton growth, magma-chamber formation and super-eruptions  Nature.com
  3. Volcanic super eruptions are millions of years in the making—followed by swift surge, scientists find  Phys.org
  4. View Full Coverage on Google News
Scientists have discovered that super-eruptions occur when huge accumulations of magma deep in the Earth’s crust, formed over millions of years.Volcanic super-eruptions are millions of years in the making – followed by a swift surge.

Super-eruptions occur when huge accumulations of magma formed over millions of years - Tech Explorist

Generation of silicic magmas leads to emplacement of granite plutons, huge explosive volcanic eruptions and physical and chemical zoning of continental and arc crust1–7. Whereas timescales for silicic magma generation in the deep and middle crust are prolonged8, magma transfer into the upper crust followed by eruption is episodic and can be rapid9–12. Ages of inherited zircons and sanidines from four Miocene ignimbrites in the Central Andes indicate a gap of 4.6 Myr between initiation of pluton emplacement and onset of super-eruptions, with a 1-Myr cyclicity. We show that inherited zircons and sanidine crystals were stored at temperatures <470 °C in these plutons before incorporation in ignimbrite magmas. Our observations can be explained by silicic melt segregation in a middle-crustal hot zone with episodic melt ascent from an unstable layer at the top of the zone with a timescale governed by the rheology of the upper crust. After thermal incubation of growing plutons, large upper-crustal magma chambers can form in a few thousand years or less by dike transport from the hot-zone melt layer. Instability and disruption of earlier plutonic rock occurred in a few decades or less just before or during super-eruptions. Analysis of inherited zircons and sanidines from Miocene ignimbrites in the Central Andes shows that plutons were emplaced for up to 4 million years prior to onset of volcanism and that disruption of plutonic rock occurs a few decades or less just before or during super-eruptions.Nature - Analysis of inherited zircons and sanidines from Miocene ignimbrites in the Central Andes shows that plutons were emplaced for up to 4 million years prior to onset of volcanism and that...

Timescales for pluton growth, magma-chamber formation and super-eruptions | Nature

Researchers at the University of Bristol and Scottish Universities Environmental Research Centre have discovered that super-eruptions occur when huge accumulations of magma deep in the Earth's crust, ...

Volcanic super eruptions are millions of years in the making—followed by swift surge, scientists find