geolmsuВЕСТНИК МОСКОВСКОГО УНИВЕРСИТЕТА. СЕРИЯ 4. ГЕОЛОГИЯMoscow University Bulletin. Series 4. Geology0579-9406Издательский Дом МГУ10.55959/MSU0579-9406-4-2024-63-3-3-12geolmsu-694Research ArticleСтатьиНовые высокобарические полиморфные модификации магнетита, ильменита, оливина, пироксенов и полевых шпатовNew high-pressure polymorphs of magnetite, ilmenite, olivine, pyroxenes and feldsparsПущаровскийД. Ю.PushcharovskyD. Yu.

Дмитрий Юрьевич Пущаровский

Москва

Dmitry Yu. Pushcharovsky

Moscow

dmitp01@mail.ruМосковский государственный университет имени М.В. ЛомоносоваРоссияLomonosov Moscow State UniversityRussian Federation20240707202403312Copyright © Пущаровский Д.Ю., 20242024Пущаровский 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/694

Новые высокобарические минералы, прису тствующие в метеоритах, испытавших ударные воздействия, могут рассматриваться как вероятные компоненты глубинных геосфер. В статье дана характеристика структурных особенностей недавно открытых минералов этого генетического типа, представляющих геофизический интерес. Особое внимание обращено на новые данные о структурных трансформациях в глубинных оболочках Земли (Fe,Ti) — оксидов со структурами типа ильменита и постшпинельных фаз, высокобарических модификаций магнетита, оливина, пироксенов и полевых шпатов. Структуры и состав новых НР-минералов из импактных зон, метеоритов и алмазных включений несут информацию о сложной петрологии глубинных геосфер, которая не может проявиться  в продуктах лабораторных экспериментов, а также позволяют спрогнозировать их роль как возможных транспортеров крупных катионов в мантии Земли, влияющих на тепловой режим Земных недр.

The new high-pressure shock-produced minerals discovered in meteorites can be considered as the possible components of the deep-seated geospheres. The structure peculiarities of the recently discovered minerals of this genetic type and of the geophysical interest are discussed in the paper. The special attention is addressed on the structure transformation under high pressure of the (Fe,Ti)-oxides and the new HP-polymorphs of ilmenite, post-spinel phases, magnetite, olivine, pyroxene and feldspars. The high-pressure polymorphs of these minerals are thought to be the constituent of the deep Earth’s interior. The crystal structures and composition of new НР-minerals discovered in meteorites and in the rocks near terrestrial impact craters provide the richer information on the complicate petrology of deep-seated geospheres which cannot be obtained on the base of laboratory experiments. On this basis it is also possible to predict their role as potentially important carriers of large ion lithophile elements in the Earth’s mantle and, hence, important contributors to the Earth’s heat budget.

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