TY JOUR TI Silicon in ferromanganese crusts from the Sea of Japan: peculiarities of allocation and interrelation with main ore phases KW ferromanganese crusts KW silicon KW Fe-slides KW Sea of Japan JO Vestnik of geosciences AU Astakhova, N.V. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"