Abstract
Chemical and isotopic compositions of Proterozoic metaterrigenous rocks of the Kan Block (Central and Idar terranes) of the Eastern Sayan are studied. The results of the reconstruction of their provenances and sedimentation conditions are presented. The rocks under investigation correspond by their petrogeochemical composition to graywackes of island arcs. The combination of geochemical and isotope data shows that sediments of the Central terrane had a local provenance represented by Early Proterozoic subduction magmatic complexes, whereas sediments of the Idar terrane formed probably as the result of mixing of terrigenous material related to the destruction of rocks of Meso-Neoproterozoic oceanic and more ancient continental crust.
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Original Russian Text © N.V. Dmitrieva, O.M. Turkina, A.D. Nozhkin, 2008, published in Litologiya i Poleznye Iskopaemye, 2008, No. 2, pp. 186–201.
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Dmitrieva, N.V., Turkina, O.M. & Nozhkin, A.D. Petrogeochemical features of metaterrigenous rocks of the Kan Block of the Eastern Sayan: Reconstructions of provenances and sedimentation conditions. Lithol Miner Resour 43, 165–179 (2008). https://doi.org/10.1134/S0024490208020065
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DOI: https://doi.org/10.1134/S0024490208020065