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Major Supereruptions in the Earth’s History Were Caused by Deep Water Migration

... the Indian Ocean plate. This zone, which clearly stands out on the map of the seabed, separates two parts of the plate with different ages and is a weakened part of the lithosphere, which facilitates the penetration of seawater to the crust. In the subduction zone, the oceanic Indian plate sinks into the mantle beneath Sumatra and pulls there the water-saturated IFZ. At a depth of about 150 km, directly beneath the Toba Caldera, this water is ejected from the subducting lithospheric plate. Then, the water begins to migrate upward through the mantle wedge, altering the mantle rocks to make them more fusible and less dense. The ascent of the rocks leads to the formation ...

Modified: 02.09.2016
supervolcanoes , Toba , Sumatra , Indonesia , seismic model , tectonics , subduction , volcanism , caldera , crust structure , magma chambers , supereruptions
Path: Главная / Articles
Major Supereruptions in the Earth's History Were Caused by Deep Water Migration

... the Indian Ocean plate. This zone, which clearly stands out on the map of the seabed, separates two parts of the plate with different ages and is a weakened part of the lithosphere, which facilitates the penetration of seawater to the crust. In the subduction zone, the oceanic Indian plate sinks into the mantle beneath Sumatra and pulls there the water-saturated IFZ. At a depth of about 150 km, directly beneath the Toba Caldera, this water is ejected from the subducting lithospheric plate. Then, the water begins to migrate upward through the mantle wedge, altering the mantle rocks to make them more fusible and less dense. The ascent of the rocks leads to the formation ...

Modified: 08.08.2016
supervolcanoes , Toba , Sumatra , Indonesia , seismic model , tectonics , subduction , volcanism , caldera , crust structure , magma chambers , supereruptions
Path: Главная / News

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