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Ascension and storage | Big Idea : Magma moves in fits and starts
https://magmamovesinfits.wordpress.com/what-happens-in-deep-earth/ascent
Big Idea : Magma moves in fits and starts. Unsteady magmatic flow, viscosity, feeding system. Skip to primary content. What happens in deep Earth? How to create magmas. How can viscosity change. Consequences on magma motions. Viscosity during the eruption. Volatiles: oversaturation and magma movements. Feeding system and changes in viscosity. People working on this. More about the Big Idea. This section mainly relies on. When pressure conditions are small enough, the surrounding rocks become less dense t...
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Feeding system mechanics | Big Idea : Magma moves in fits and starts
https://magmamovesinfits.wordpress.com/geometry-of-the-feeding-system/feeding-system-mechanics
Big Idea : Magma moves in fits and starts. Unsteady magmatic flow, viscosity, feeding system. Skip to primary content. What happens in deep Earth? How to create magmas. How can viscosity change. Consequences on magma motions. Viscosity during the eruption. Volatiles: oversaturation and magma movements. Feeding system and changes in viscosity. People working on this. More about the Big Idea. In this section I use a more physical approach to show that not only viscosity can create a cyclicity. As we consid...
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Synthesis | Big Idea : Magma moves in fits and starts
https://magmamovesinfits.wordpress.com/synthesis
Big Idea : Magma moves in fits and starts. Unsteady magmatic flow, viscosity, feeding system. Skip to primary content. What happens in deep Earth? How to create magmas. How can viscosity change. Consequences on magma motions. Viscosity during the eruption. Volatiles: oversaturation and magma movements. Feeding system and changes in viscosity. People working on this. More about the Big Idea. If the fraction of magma leaving the chamber is higher that the replenishment rate, then pressure in the chamber de...
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Volatiles: oversaturation and magma movements | Big Idea : Magma moves in fits and starts
https://magmamovesinfits.wordpress.com/geometry-of-the-feeding-system/volatiles-oversaturation-and-magma-movements
Big Idea : Magma moves in fits and starts. Unsteady magmatic flow, viscosity, feeding system. Skip to primary content. What happens in deep Earth? How to create magmas. How can viscosity change. Consequences on magma motions. Viscosity during the eruption. Volatiles: oversaturation and magma movements. Feeding system and changes in viscosity. People working on this. More about the Big Idea. Volatiles: oversaturation and magma movements. This exsolution occurs when the. The oversaturation causes bubbles c...
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6.8 | Growth and movements of bubbles drives eruptions
https://bubblesbigidea.wordpress.com/6-8
Growth and movements of bubbles drives eruptions. Skip to primary content. 68 Passive degassing is linked to the kind of flow during the ascension. Under some conditions, passive degassing can occur in viscous magmas if bubbles can connect together, increasing the permeability, so that gases can escape toward the surface through permeable foam. This process is called coalescence. Here is a picture of the mount Etna in Sicily with its permanent plume due to passive degassing. Viscous magma : bubbles move ...
bubblesbigidea.wordpress.com
6.6 | Growth and movements of bubbles drives eruptions
https://bubblesbigidea.wordpress.com/6-7
Growth and movements of bubbles drives eruptions. Skip to primary content. 66 Bubbles induce an increase of the melt viscosity. When bubbles become major proportions of the bulk volume, the bulk material experiences increased viscosity. For instance, in Hawaii, the basaltic magma of the Kilauea products only lava flows whereas the more viscous magma of the Mount Pinatubo produced one of the largest eruption in 1991. Small bubbles which are reabsorbed in the melt. This video by Barry Bickmore shows the ef...
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People working on this | Big Idea : Magma moves in fits and starts
https://magmamovesinfits.wordpress.com/index/people-working-on-this
Big Idea : Magma moves in fits and starts. Unsteady magmatic flow, viscosity, feeding system. Skip to primary content. What happens in deep Earth? How to create magmas. How can viscosity change. Consequences on magma motions. Viscosity during the eruption. Volatiles: oversaturation and magma movements. Feeding system and changes in viscosity. People working on this. More about the Big Idea. People working on this. Dr Oleg Melnik: studies fluid dynamics and applies this to magmatic systems. Dr Georg Zellm...
bubblesbigidea.wordpress.com
6.3 | Growth and movements of bubbles drives eruptions
https://bubblesbigidea.wordpress.com/1-3
Growth and movements of bubbles drives eruptions. Skip to primary content. 63 Bubbles nucleation appears after oversaturation of the melt. By Cioni et al. Nucleation of bubbles within the magma chamber due to over-saturation in volatiles. Growth of bubbles when magma acsent because of diffusion and decompression. Fragmentation = burst of bubbles when the over-pressure within the bubbles is too important. Cartoon showing the path of a magma as it ascents and exsolves its volatiles. Enter your comment here.
