Kievey deposit, Fedorovo-Pansky massif (Pana layered complex), Murmansk Oblast, Russiai

Regional Level Types
Kievey deposit	Deposit
Fedorovo-Pansky massif (Pana layered complex)	Massif
Murmansk Oblast	Oblast
Russia	Country

Includes a 6 km long part of the North Reef from the Mar’jok to the East Kievey site.
The North PGE Reef consists of a series of thin, lens-shaped bodies of various rocks of the Lower Layered Horizon (“reef package”) containing typically 2–5 vol.% of disseminated sulfides and PGE up to the first tens of ppm. In many of its characteristics, primarily thickness, extent, and PGE content, the North Reef is close to the well-known Merensky Reef in South Africa, as well as to the JM Reef in the USA. The North Reef is divided along its strike into several portions named after the neighboring mountain uplands of the Pana Tundra Ridge: (1) Kamennik, (2) Suleipakhk, (3) Kievey and (4) Peshempakhk. The reserves of base and precious metals at the Kievey site, as well as at the Kamennik site, were calculated by the joint efforts of academic organizations and companies. The PGE- and Au-enriched sulfide mineralization at the Kievey deposit is associated primarily with the second cycle of the Lower Layered Horizon, but in subsequent cycles PGE mineralization does not disappear and occurs in the form of more discontinuous lenses. Sulfides are mainly represented by pyrrhotite, chalcopyrite, and pentlandite. The main PGE minerals are kotulskite, vysotskite, merenskyite, braggite, and moncheite. In addition, the mineralized rocks contain gold and Pd-pentlandite. The main type of mineralized rocks is leucogabbro and anorthosites. According to ordinary sampling data, these rocks make up 42% of the main ore body of the Kievey deposit. As an interesting property of the North Reef, it should be noted that each occurrence of mineralized rocks in the Lower Layered Horizon is accompanied by a maximum content of anorthite in the plagioclase in contrast to the adjacent barren rocks.

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References