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Геодинамика и тектонофизика

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ГЛУБИННАЯ ГЕОДИНАМИКА: ГРАНИЦЫ ПРОЦЕССА ПО ГЕОХИМИЧЕСКИМ И ПЕТРОЛОГИЧЕСКИМ ДАННЫМ

https://doi.org/10.5800/GT-2010-1-1-0008

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Аннотация

Проведен анализ геохимических характеристик вулканических пород и петрологических данных по глубинным включениям, которые могут быть использованы для оценки обмена веществом между различными геосферами Земли. Несмотря на то, что обычно рассматривается возможность субдуцирования слэбов вплоть до границы ядро–мантия и последующего возвращения материала в область подлитосферной магмогенерации в форме мантийных плюмов, петрологические доказательства самого глубокого поступления вещества на поверхность ограничиваются верхними горизонтами нижней мантии (~650–700 км), т.е. глубиной самых глубоких землетрясений. Включения ферропериклаза в некоторых алмазах не опровергают вовлечение и более глубоких горизонтов мантии, однако не дают этому однозначного подтверждения. Геохимические данные также не дают однозначного подтверждения вовлечения вещества нижней мантии в процессы магмогенерации под вулканически активными районами. В то же время они свидетельствуют о полной вещественной изоляции ядра от верхнемантийных процессов.

Об авторе

Алексей Викторович Иванов
Институт земной коры СО РАН
Россия

канд. геол.-мин. наук, с.н.с.,

664033, Иркутск, ул. Лермонтова, 128



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Иванов А.В. ГЛУБИННАЯ ГЕОДИНАМИКА: ГРАНИЦЫ ПРОЦЕССА ПО ГЕОХИМИЧЕСКИМ И ПЕТРОЛОГИЧЕСКИМ ДАННЫМ. Геодинамика и тектонофизика. 2010;1(1):87-102. https://doi.org/10.5800/GT-2010-1-1-0008

For citation:


Ivanov A.V. DEEP-LEVEL GEODYNAMICS: BOUNDARIES OF THE PROCESS ACCORDING TO GEOCHEMIC AND PETROLOGIC DATA. Geodynamics & Tectonophysics. 2010;1(1):87-102. (In Russ.) https://doi.org/10.5800/GT-2010-1-1-0008

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