Title

M. N. Goloburdina

THE NATURE OF CARBONATE OF KIMBERLITE BRECCIAS OF MOUNT BLAGODAT (WESTERN SIDE OF THE MIDDLE URAL MOUNTAINS)

The article presents the results of petrographycal and geochemical research of kimberlite breccias of Mount Blagodat located on the western side of the Middle Urals. Determined the isotopic composition δ¹³С, δ¹⁸О и ⁸⁶Sr/⁸⁷Sr of carbonates of breccias and xenolith of spinelle peridotite. It was found that the content of rare elements and rare earth metals of the carbonated breccias similar the not carbonated breccias and does not match the carbonatites. The obtained data on the isotopic composition of carbon, oxygen and strontium in carbonate of kimberlite breccias suggest that the source of carbonated fluids associated with the crust component.
Keywords: western side of the Middle Ural Mountains, carbonation of Middle Paleozoic kimberlites, composition δ¹³С, δ¹⁸О и ⁸⁶Sr/⁸⁷Sr of carbonates.