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SILICIC EXPLOSIVE VOLCANISM: MODALITIES OF MAGMA ...

SILICIC EXPLOSIVE VOLCANISM: MODALITIES OF MAGMA ...

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Raffaello Cioni – Silicic explosive volcanism – GEOITALIA 2009 – Rimini 7-8 settembreMagma degassingDecompression-induced degassingSupersaturation &Bubble nucleationBubble growth(diffusion + decompression)Raffaello Cioni – Silicic explosive volcanism – GEOITALIA 2009 – Rimini 7-8 settembreDynamics of magma ascentConservation equations: why does magmaaccelerate in the conduit?For cylindric conduits, mass conservation impliescontinuous acceleration during degassingMass

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