This intrusion, located in the northern Karelia area, and dated at 2442 ± 1.9 Ma, belongs to the Oulanka plutonic group. The intrusion cuts rocks of the Archean granite-migmatite-gneiss basement and is disconformably overlain by Proterozoic metavolcanic rocks. It is a layered body not exceeding 4,600 meters in thickness.
The layered body shows various kinds of cumulates, peridotites, gabbronorites, norites, anorthosites, pyroxenites, etc.
A pegmatoidal plagioclase-bearing meta-pyroxenite, hosted by a sill of microgabbronorite, is mineralized with Cu/Ni sulphides (pods and stringers, opx-interstitial or included in enstatite), PGE minerals, Ag-Au alloys, hessite, Re-rich molybdenite and tarkianite.
Refs.:
- Grokhovskaya, T.L., Distler, V.V., Klyunin, S.F., Zakharov, A.A., Laputina, I.P. (1992) Low-sulfide platinum group mineralization of the Lukkulaisvaara pluton, Northern Karelia. International Geology Review: 34: 503-520.
- Barkov, A.Yu. and Lednev, A.I. (1993) A rhenium-molybdenum-copper sulfide from the Lukkulaisvaara layered intrusion, Northern Karelia, Russia. European Journal of Mineralogy: 5: 1227-1233.
- Barov, A.Yu., Pakhmovskii, Y.A., and Men'shikov, Y.P. (1995) Zoming in the platinum-group sulfide minerals from the Lukkulaisvaara and Imandrovsky layered intrusions, Russia. Neues Jahrbuch für Mineralogie, Abhandlungen: 169: 97-117.
- Barkov, A.Yu., Men'shikov, Y.P., Begizov, V.D., Lednev, A.I. (1996) Oulankaite, a new platinum-group mineral from the Lukkulaisvaara layered intrusion, Northern Karelia, Russia. European Journal of Mineralogy: 8: 311-316.
- Glebovitsky, V.A., Semenov, V.S., Belyatsky, B.V., Koptev-Dvornikov, E.V., Pchelintseva, N.F., Kireev, B.S., and Koltsov, A.B. (2001) The Structure of the Lukkulaisvaara intrusion, Oulanka group, northern Karelia: petrological implications. Canadian Mineralogist: 39(2): 607-637.
- Barkov, A.Y., Fleet, M.E., Martin, R.F., and Tarkian, M. (2004) Compositional variations of oulankaite and a new series of argentian oulankaite from the Lukkulaisvaara layered intrusion, northern Russian Karelia. Canadian Mineralogist: 42: 439-453.
