Tl. Grokhovskaya et al., PGE-COPPER-NICKEL MINERALIZATION OF THE LAYERED MASSIF OF THE GENERALSKAYA MOUNTAIN (PEEHENGA ORE DISTRICT, KOLA-PENINSULA), Geology of ore deposits, 38(3), 1996, pp. 183-196
New data on the petrology, phase, and cryptic layering of the General'
skaya (Luostari) mountain massif as well as on the geochemistry and mi
neralogy of its platinum-copper-nickel mineralization are presented. T
he intrusive rocks are divided into marginal and layered groups. The l
ayered group includes the upper and lower gabbronorite zones and the m
iddle rhythmically layered zone, where massive gabbronorites intercala
te with rocks of contrasting composition. Low-sulfide platinum mineral
ization is localized within several extended horizons of thin-layered,
taxitic, and poikilitic rocks of the rhythmically layered zone. The g
rade of platinum metals in ore horizons is up to 5 g/t with palladium
predominating over other platinum group elements (PGE). The PGE occur
in the massif in mineral and dispersed forms. The predominant platinum
-bearing association in the ore horizons of the General'skaya mountain
massif consists of merenskyite and sulfarsenides of Ni and Co with an
admixture of PGE and hollingworthite. A wide range of miscibility bet
ween hollingworthite and Pd- and Rh-bearing cobaltite and gersdorffite
is defined. The Pechenga ore district is characterized by the develop
ment of a peculiar mineralogical ''sulfarsenide'' province with a frac
tionation of PGE in the individual sulfarsenide parageneses of each in
trusion.