Scientific publications

The geological and petrological pattern of alteration of mafic granulites to eclogite-like rocks was studied in the Lake Notozero-Lake Kovdozero area, on the Pongomnavolok Peninsula, in Pongoma Bay of the White Sea and on the Vichany and Mundinnavolok Peninsulas on Lake Keret, where GECcomplexes [1–4] of BMB occur. Diaphthoric alterations of OG to CP and EKL took place under Belomorian-type kyanite (amphibolite) and/or kyanite-muscovite (epidote-amphibolite)- facies conditions, which is attributed to a collision stage in the evolution of BMB. Furthermore, studies, conducted on the Vichany and Mundinnavolok Peninsulas of Lake Keret in the GEC-complex, have shown that metasomatic eclogite-like rocks can be formed under granulite-facies conditions that pass into amphibolite-facies [3]. The sequence, types, pattern, similarity and difference of metamorphic and metasomatic processes that result in the consecutive two-stage transition of mafic granulites to clinopyroxene-plagioclase and farther to eclogite-like rocks.