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Tolbachick – ​a unique geochemical phenomenon

The Tolbachinskiy volcano, or Tolbachik, has a very peculiar geochemistry. This peculiarity manifests itself primarily in the unusually high potassium content of its eruptive rocks: its basalts contain up to 4 percent of potassium oxide (К 2 О). Such values are not only maximal for the Kamchatka peninsula – ​they are among the highest of all island arc volcanoes formed as the result of subductions (the eruptive rocks of the South American Cordilleras show similar values) It is known that high...

Modified: 29.12.2018
Pacific Ring of Fire , volcanoes of Kamchatka , klyuchevskoy volcano group , Tolbachik , eruption , tectonics , subduction , seismic tomography , tomographic algorithms , geochemistry
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Tolbachik Eruption – another message from the Land of Volcanoes

The majority of volcanic eruptions and earthquakes on our planet occur along the so called Ring of Fire – a chain of over five hundred dormant three hundred active volcanoes lined up along the perimeter of the Pacific Ocean. The reason is that this area lies on the junction of oceanic and continental tectonic plates, and volcanic activity is directly linked with their incessant interaction in the ongoing process of continent drift. The Pacific Ring of Fire (or rather, an arc) stretches along the...

Modified: 29.12.2018
Pacific Ring of Fire , volcanoes of Kamchatka , klyuchevskoy volcano group , Tolbachik , eruption , tectonics , subduction , seismic tomography , tomographic algorithms , geochemistry
Path: Главная / Articles
Major Supereruptions in the Earth’s History Were Caused by Deep Water Migration

Siberian scientists, in collaboration with colleagues from France and Saudi Arabia, used a comprehensive geophysical study of the deep structure beneath the Toba Caldera on Sumatra to simulate the processes leading to the recurrent supereruptions. The results of this study have been published in the prestigious journal Nature Communications The supereruption is an explosive eruption ejecting, in a single event, over 1000 cubic kilometers of material in the dense rock equivalent. Over the past...

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

Siberian scientists, in collaboration with colleagues from France and Saudi Arabia, used a comprehensive geophysical study of the deep structure beneath the Toba Caldera on Sumatra to simulate the processes leading to the recurrent supereruptions. The results of this study have been published in the prestigious journal Nature Communications The supereruption is an explosive eruption ejecting, in a single event, over 1000 cubic kilometers of material in the dense rock equivalent. Over the past...

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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