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Т-Р условия кристаллизации гранитоидов Монголо-Охотской зоны по данным исследования расплавных и флюидных включенийстатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАКДата последнего поиска статьи во внешних источниках: 29 ноября 2013 г.
- Авторы: Коваль П.В., Прокофьев В.Ю.
- Журнал: Петрология
- Том: 6
- Номер: 5
- Год издания: 1998
- Первая страница: 497
- Последняя страница: 511
- DOI: WOS:000076279400003
- Аннотация: The crystallization conditions of granitic rocks of the Mongolia-Okhotsk zone were estimated on the basis of data on their geochemistry and inclusions in minerals at 1235-540 degrees C and 8000-90 bar at a content of water of 13.9-0.2 wt %. The range of the physicochemical conditions of granitoid melt crystallization (temperature, pressure, and water concentration in the melt) increased to the highest (possible under crustal conditions) values with decreasing depth facies of the granitoids. The estimates obtained on the batholithic levels of the intrusions usually correspond to the range of the main modal values of the distributions. Extreme values were commonly yielded by small and metalliferous granitoid intrusions of the rare-metal geochemical types. It was demonstrated that granitoids of the rare-metal geochemical types can form by means of the fluid-magmatic differentiation (metamagmatic transformation) of earlier palingenetic granitoid melts in the presence of CO2-rich fluids. Fluid-magmatic differentiation played an important part in the development of metalliferous magmatic systems.
- Добавил в систему: Прокофьев Всеволод Юрьевич