PLATINUM METAL MINERALIZATION IN THE WESTERN PANA MASSIF (KOLA PENINSULA)

Abstract

New data on the geological structure and composition of the platinoid (PGE) mineralization in the Upper Layered Horizon (ULH) of the Western Pana Massif made it possible to compare them with the data on mineralization in the Lower Layered Horizon (LLH). The two horizons differ significantly in the abundance and assemblage of mineral species and classes. The new data confirm the concept of the formation of layered horizons in two different magmatic subphases. The Western Pana Massif, a member of the Fedorova–Pana layered (ultramafic–mafic) complex of Early Proterozoic age, extends over approximately 30 km as a 3840-m-thick magmatic body dipping at 30°–40°. The massif is sandwiched between Archean rocks and Karelides of the Imandra–Varzuga zone. The massif represents a stratified body mainly composed of gabbronorites and includes two horizons of intensely layered rocks identified above as LLH and ULH.