PROGNOSTIC ESTIMATE OF NOBLEMETAL RESOURCES IN PROMISING ORE DISTRICTS OF THE KARELIAN REGION

• Published in: Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
• Main Authors: Анатолий Иванович Голубев, Василий Иванович Иващенко, Anatoly Golubev, Vasily Ivashchenko
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: Karelian Research Centre of the Russian Academy of Sciences 2017
• Subjects: докембрий; карелия; золото; платина; палладий; мало- сульфидный pt-pd тип оруденения; расслоенные плутоны; габбродолериты; пудожгорское месторождение; орогенное мезотермальное золото; сдвиговые зоны; Science; Q; Onega; Vygozero; karelian
• Online Access: https://doi.org/10.17076/geo384; https://doaj.org/article/36bfa032906a4424ad7d724eb375008f

The gold and platinoid resources of the Karelian region are expected to increase. Our prediction is based on the leading genetic types of noble-metal mineralization known in the region such as the low-sulphide Pt-Pd type in layered plutons and gabbro-dolerites, CuU-Mo-V-Pt-Pd-Au polygenic Padma type, orogenic mesothermal gold type and complex gold-porphyry type, as well as new types not reported earlier such as stratiform black shale type, iron oxide type with copper and gold (IOCG) and Rompas gold-uranium type. Noble-metal mineralization in the metapyroxenites of the Kaalamo and Välimäki igneous complexes, Latvasyrja aposkarn metasomatic rocks in Priladozhye (Lake Ladoga area) and Zaonezhye (Trans-Onega) black shales are described briefly mineralogically and geochemically. The mineralogical and geochemical indicators of noble-metal ore formation in Karelia’s Paleoproterozoic trapps, tested at the Pudozhgorsky igneous complex and the Chinozero sill, are identified. Variations in the PT-parameters of ore formation in the Koikary-Vygozero shear zone are interpreted as a reliable criterion for its predictive metallogeny evaluation for orogenic gold.