GEOL 212 Study Guide - Quiz Guide: Overpressure, Cryovolcano, Paroxysmal Attack
26 Dec 2017
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These volcanoes seem to erupt two distinct types of material: extremely hot magma (up to 1600 k). This corresponds to terrestrial eruptions of mafic (basalt) ultramafic komatiite. This typically erupts effusively, pooling up as lava lakes or flowing long distances: sulfur compounds including sulfur dioxide (so2), hydrogen sulfide (h2s), and elemental sulfur. These compounds are mostly responsible for io"s color palate. They are primarily found in explosive plume-like eruptions. So2 is an especially important constituent that exits the vent as a gas and condenses into white. Io"s mantle and crust are probably highlydifferentiated, with additional differentiation of the silicate and sulfur-compound portions of the crust. The upper mantle experience extensive melting that yields ultramafic komatiitic magma. As this magma rises, it in turn, melts sulfur compounds of the upper crust. Perhaps it makes better sense to refer to ultramafic eruptions as volcanoes and sulfur eruptions as.
