Lithochemical typification of Early Precambrian ferruginous-siliceous formations in the East European Craton |
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| Authors: | N V Aksamentova |
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| Institution: | (1) Institute of Geochemistry and Geophysics, Belorussian Academy of Sciences, ul. Kuprevicha 7, Minsk, 220141, Belarus |
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| Abstract: | The first comparative paleolithochemical characteristics of Early Precambrian ferruginous-siliceous formations of the East European Craton confined to four stratigraphic levels—Lower Archean, Upper Archean (Lopian), Lower Karelian, and Upper Karelian—are presented. Using the MINLITH method and software package for lithochemical calculations, the possible primary composition of metasedimentary rocks is reconstructed and paleogeographic settings of sedimentation are suggested. It is shown that different age formations represented initially lithogenetic groups with different compositions and quantitative relationships between the major types of sedimentary rocks with gradual transitions and genetic affinity. They accumulated in paleotectonic and facies settings that were specific for each stage of iron ore sedimentation, resulting in the development of four genetic (Bug, Algoma, Okolovo, and Lake Superior) types of ferruginous-siliceous formations. |
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