Experimental modelling of the chondritic structure

Авторы: Bezmen N.I., Gorbachev P.N., Zinovieva N.G.
Журнал: Experiment in GeoSciences
Том: 24
Номер: 1
Год издания: 2018
Первая страница: 16
Последняя страница: 18
Аннотация: The chondritic structure was experimentally obtained with the example of forsterite meteorites. It is received 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 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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