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geolmsu

ВЕСТНИК МОСКОВСКОГО УНИВЕРСИТЕТА. СЕРИЯ 4. ГЕОЛОГИЯ

Moscow University Bulletin. Series 4. Geology

0579-9406

Издательский Дом МГУ

10.33623/MSU0579-9406-4-2025-64-5-3-26

geolmsu-838

Research Article

Статьи

Водосодержащие минералы в мантии Земли

The hydrated minerals in the Earth’s mantle

https://orcid.org/0000-0001-6960-1021

Пущаровский

Д. Ю.

Pushcharovsky

D. Yu.

Пущаровский Дмитрий Юрьевич.

Москва

Dmitry Yu. Pushcharovsky.

Moscow

dmitp01@mail.ru

Московский государственный университет имени М.В. ЛомоносоваРоссияLomonosov Moscow State UniversityRussian Federation

2025

09112025

645326

2025

Пущаровский Д.Ю.

Pushcharovsky D.Y.

Данная работа распространяется под лицензией Creative Commons Attribution 4.0.

This work is licensed under a Creative Commons Attribution 4.0 License.

https://vestnik.geol.msu.ru/jour/article/view/838

Глубинные оболочки Земли отличаются различным содержанием воды. Основной механизм переноса воды из земной коры и Мирового океана в глубинные оболочки связан с процессами субдукции океанической литосферы. Мантийная переходная зона, благодаря способности накапливать воду номинально безводными минералами (вадслеитом и рингвудитом) представляет собой ее важнейший резервуар, особенно в сравнении с верхней мантией. Верхнемантийные перидотиты в составе погружаемых плит внутри переходной зоны могут сохранять H2O на больших глубинах в таких соединениях, как «алфавитные» DHMS фазы. Состав перидотита нижней мантии включает 80 масс. % Mg-перовскита (бриджманита), 15 масс. % ферропериклаза и 5 масс. % Ca-перовскита (дейвмаоита). Среди этих минералов наибольшее содержание воды допускается в Ca-перовските, за которым следуют Mg-перовскит и ферропериклаз. Учитывая огромную массу мантии Земли, даже минимальное количество воды, сосредоточенное в номинально безводных фазах, может в несколько раз превышать количество воды в современной гидросфере, несмотря на дегазацию мантии в результате вулканической деятельности, происходившей особенно интенсивно в первые 500 млн лет формирования планеты. Дана структурная характеристика минералов — возможных аккумуляторов воды в условиях глубинных геосфер.

The Earth’s deep-seated shells are characterized by different water contents. The main mechanism of water transfer from the Earth’s crust to the mantle is related with the subduction processes of the oceanic lithosphere. The mantle transition zone, due to its ability to accumulate water in nominally anhydrous minerals (wadsleyite and ringwoodite) is its most important reservoir, especially in comparison with the upper mantle. Upper mantle peridotite within subducting slabs inside the transition zone can preserve H2O at great depths in compounds such as “alphabetic” DHMS phases. The composition of lower mantle peridotite includes 80 wt % Mg-perovskite (bridgmanite), 15 wt % ferropericlase, and 5 wt % Ca-perovskite (davemaoite). Among these minerals, the highest water content is allowed in Ca-perovskite, followed by Mg-perovskite and ferropericlase. Taking into account the huge mass of the Earth’s mantle, even the minimum amount of water concentrated in nominally anhydrous phases can exceed the amount of water in the modern hydrosphere several times, despite the degassing of the mantle as a result of volcanic activity, which occurred especially intensively during the first 500 million years of the planet’s formation. The structural characterization of minerals — possible accumulators of water in the conditions of deep geospheres is given.

мантия Земливодосодержащие минералы«алфавитные» фазыноминально безводные минералы

Earth’s mantlewater-bearing minerals“alphabetic” phasesnominally anhydrous minerals

Автор благодарен членам-корреспондентам РАН Ф.В. Каминскому и Н.Н. Еремину, профессорам А.Л. Перчуку и Н.В. Зубковой за советы и обсуждение этой работы. Исследование выполнено в рамках государственного задания МГУ имени М.В. Ломоносова.

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The authors declare that there are no conflicts of interest present.