The feedback of iron-rich ores with the metamorphic rocks (BIF) of the Kursk magnetic anomaly
Rich-iron ores of the Kursk magnetic anomaly are high-grade products of weathering of banded meta-morphic rocks (BIF). They form linear-areal and linear iron ore - residual forms of weathering crusts. Linear weathering crusts preserve indigenous textural features of BIFs. Relationships between metamorphic minerals and supergene minerals available: magnetite in to martite, martite in to micaceous hematite or high-grained hematite and then hematite in to mushketovite. Linear-areal weathering crusts not have transition zones after of the underlying metamorphic rocks. Sizes of ores deposits and distributions of mineral associations controlled by the intensity of the development of karst processes.