Figure 2. Diagram of the geological structure of the Monchegorsk pluton [Sharkov, 1980] a) Position of the Monchegorsk complex in the main tectonic structures of the N-E part of the Baltic shield. MB - 1 - Murmansk block; TsKB - Central Kola block; T and L - Tersk and Lottinsk fragments of the Tersk-Lottinsk block; P and I-V - Pechenega and Imandra-Varzuga structures of the Pechenega-Varzuga volcanogenic-sedimentary belt; LGP and UGP - Laplandia and Umbina fragments of the Laplandia-Umbina granulite belt; GLR - Laplandia main deep fault; MK - Monchegorsk complex. b) Diagram of the geological structure of the Monchegorsk pluton 1 - host diorite-gneiss, crystalline schist of the Kola series and other rocks of the recent Archean; 2 - peripheral endocontact zones of the intrusion; 3 - dunite, peridotite; 4 - rhythmic interbedding of dunite, peridotite, olivine bronzitite and bronzitite; 5 - predominantly bronzitite; 6 - zones of the sulphide mineralization; 7 - position of the core holes; 8 - area for taking oriented samples for the paleomagnetic study; 9 - norite; 10 - altered norite, 11 - faults.