Find of cordierite hornfels in the Upper layered horizon of the West-Раnа platinum-bearing massif at Kola Peninsula

Groshev N. Yu., Rundqvist T. V.,Bazai A. V.

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2015. V. 144. N 2. P. 82-98

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Language: Russian


A xenolith of hercynite-plagioclase-cordierite hornfels was found in the core of a drill-hole in the West-Pana massif. This xenolith occurs there in several meters above the main anorthosite layer of the South platinum-bearing Reef in the Upper Layered Horizon (ULH). Platinum group minerals and gold were detected in these hornfels for the first time in the West-Pana massif, and this event confirms the concept of multiphase character of the PGM mineralization there. Basic rocks of the Fedorov-Pana complex are assumed to be a protolith of the hornfels, so, obtained data support probably the multiphase formation idea for other platinum-bearing intrusions in Kola Peninsula.

Key words: hornfels, xenoliths in layered intrusions, contact metamorphism, platinum group elements, South Reef, Fedorov-Pana complex.