For citations:

Nugumanova Ya.N., Doroshkevich A.G. COMPOSITION OF SPINEL GROUP MINERALS FROM LATE PROTEROZOIC ULTRAMAFIC LAMPROPHYRES OF THE BOLSHETAGNINSKII ALKALINE ULTRAMAFIC CARBONATITE COMPLEX LOCATED AT THE URIK-IYA GRABEN, EASTERN SAYAN REGION. Geodynamics & Tectonophysics. 2022;13(4):0656. (In Russ.) https://doi.org/10.5800/GT-2022-13-4-0656