ИСТИНА

Our data on the chondrule and matrix minerals allowed us to evaluate the temperature and pressure by the olivineclinopyroxene- orthopyroxene assemblage. The textural traits of the chondrules and matrix with a normal magmatic crystallization succession of minerals and the narrow ranges of temperature (890-950C) and pressure (6.1-6.8 kbar) suggest that the minerals crystallized in equilibrium from a chondritic melt at a certain depth in the parent body. Our pressure estimates for clinopyroxene crystallization in the parent body make it possible to evaluate the radius of the parent body during the planetary episode of its evolution at 600 -700 km.