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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 – ...

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

... ground: the area is virtually uninhabited, and eruptions pose little or no danger to humans. So, what has the complex study of the Tolbachik eruption yield, science-wise? As a geophysicists, I am in no position to draw any definitive conclusions about geochemistry and petrology. Eruptions in subduction areas are known to be extremely variable, and the erupted matter passes through continental-type crust, which is extremely heterogeneous in terms of its contents. The chemical contents of lavas also ...

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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Obsidian Geology and Archaeology

... informal group of geologists, archeologists, paleogeographers, and physicochemists of the Institute of Geology and Mineralogy (Novosibirsk), Far East Geological Institute (Vladivostok), University of Missouri (Columbia, United States), and Institute of Geochemistry (Irkutsk). Native of Paektu? “Archeological” obsidian in the continental Far East is represented by volcanic glasses hyalomelanes. Their provenances are bedrock exposures occurring on two plateaux: Shkotovo in the southern Primorsky ...

Modified: 22.08.2012
obsidian , geochemistry , petrology , prehistoric sources , Russian Far East
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