Санкт-Петербургский горный университет императрицы Екатерины II, Санкт-Петербург, Россия

Таловина И. В., зав. кафедрой, проф., д-р геол.-минерал. наук, i.talovina@gmail.com

Бабенко И. А., аспирант

Илалова Р. К., доцент, канд. геол.-минерал. наук

Институт минералогии Фрайбергской горной академии, Фрайберг, Германия

Дурягина А. М., канд. геол.-минерал. наук

Приведены результаты изучения составов породообразующих и акцессорных минералов различных мафитовых и ультрамафитовых формаций. Рассчитаны и проанализированы температуры образования горных пород на основании четырех оливин-шпинелевых геотермометров для разных формаций ультрамафитов и мантийных ксенолитов на примере Антарктиды, Монголии, Урала и других регионов. Отмечено, что температуры оливин-шпинелевого равновесия в породах офиолитовых зональных и расслоенных массивов оказываются сопоставимыми, а в мантийных ксенолитах – повышенными по отношению к ним. Сделан вывод о применимости основных версий геотермометров для вычисления темпера-
тур мафит-ультрамафитовых систем для реконструкции геодинамических условий формирования различных блоков земной коры. Рассмотрены некоторые типоморфные индикаторы формационной принадлежности горных пород, а именно: отношение Ni:Mn в оливине и железистость в хромшпинелиде. 
Работа выполнена в рамках государственного задания Министерства науки и высшего образования Российской Федерации (FSRW-2024–0003. Фундаментальные междисциплинарные исследования геологических образований Антарктиды в районе станции Восток).

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