| Реферат: | eng: Presents the results of detailed studies of the chemical composition of the main (olivine, orthopyroxene, clinopyroxene, plagioclase and amphibole) and secondary (scapolite, magnetite, ilmenite) minerals of channel samples of olivine gabbronorite Callbackmessage array. The gabbroids of this massif crystallized, probably, during the upward motion of the mafic melt, which was a structured suspension. The latter consisted of mixing and acquiring a wavy arrangement of phenocrysts of olivine, orthopyroxene, clinopyroxene, and plagioclase immersed in the bulk, consisting of subparallel oriented long axis and "streamlined" porphyritic phenocrysts of plagioclase laths and because of this, with trachytoid texture. The result of mixing porphyroid inclusions in the process of upward movement of the melt-suspension was that in being in close proximity to each other pyroxene inclusions evidence of their chemical equilibrium, that is, the consistency of their compositions. Banded texture gabbroids Callbackmessage array are likely the result of late-magmatic processes that are not associated with intra crystallization-gravitational differentiation of mafic melt.
|