ЭКСПЕРИМЕНТАЛЬНОЕ МОДЕЛИРОВАНИЕ ХОНДРИТОВОЙ СТРУКТУРЫ

Авторы: Безмен Н.И., Горбачев П.Н., Зиновьева Н.Г.
Сборник: /Тезисы ВЕСЭМПГ-2018
Тезисы
Год издания: 2018
Место издания: М.:GEOKHI RAS
Первая страница: 299
Последняя страница: 301
Аннотация: The chondritic structure was experimentally obtained with the example of forsterite meteorites, which formed as a result of the interaction of oxides mixture and gas components at 1250°C and a pressure of 50 MPa. The starting composition of the runs corresponded cosmic abundance of the elements. The composition of the fluid phase (C-O-H-S system) was controlled by three independent parameters: mole fraction of hydrogen, the presence of atomic carbon (crucible with the initial sample), and the fugacity of sulfur in equilibrium of the sulphide melt with metallic iron. The composition of the fluid phase at 1250 °C and 50 MPa was calculated using a special program. The presence of hydrogen in the melts leads to the rupture of Si-O-Si bridging bonds in the silicon-oxygen anions, with a part of silicon in fluid-saturated melts become a state of modifiers which cause the formation of glasses as the forsterite composition chondrules during quenching
Добавил в систему: Зиновьева Нина Георгиевна

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