Geophysical Journal | 2016 volume 38 5

Mafic dykes of Ingul megablock (Ukrainian Shield): relationship of surface and deep structures of the lithosphere, fault tectonics and geodynamics

© I.K. Pashkevich, M.I. Bakarzhieva, 2016

Morphology, structure position, formation and dyke saturation of the swarms were ascertained. New dyke swarms of "second range" were established. Intersection areas of the dyke swarms "traces" were defined. They are considered as the magmatic focuses at the different lithosphere depths, which are connected with cells of the repeatedly activated plume. Analysis of the Earth crust deep structure and peculiarities of mantle heterogeneities in the proposed magmatic focuses of dykes permitted us to conclude, that they are associated with pulsing mantle plume. U nder its influence melted mantle material moved forward from greater depths in the east to smaller one in the west. It found the escape as dykes in the north-western faults but Golovanevsk suture zone limited further extension of material.

Key words: dykes, swarms of dykes, magmatic foci, mantle plume, lithosphere.

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