Lavrent'Evskii

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Occurrence number:

136-12-010

Country:

Russia

Region:

Kola and Karelia

Location:

Longitude: 37.02, Latitude: 67.27

Carbonatite:

Lavrent'evskii has an area of 40 km2 and is emplaced in Archaean plagiogranites and gneisses. It comprises two principal phases: an early phase is represented by aegirine-arfvedsonite granites, and a later one mainly by lepidomelane granites. Contacts with the host rocks are intrusive. The mafic minerals define a distinct linear orientation. Extensive apophyses extend into the country rocks and pegmatites containing amazonite, quartz veins and zones of metasomatic alteration are developed throughout the intrusion.

Economic:

Zircon and rare-earth mineral concentrations occur (Batieva, 1976).

Age:

The Pb method on zircon gave 2560 Ma (Pushkarev, 1990).

References:

BATIEVA, I.D. 1976. The petrology of alkaline granitoids of the Kola peninsula. Nauka, Leningrad. 223 pp.
BATIEVA, I.D. et al. 1985. Magmatic formations of the north-eastern part of the Precambrian Baltic Sheild. Nauka, Leningrad. 175 pp.
PUSHKAREV, Yu.D. 1990. Megacycles in the evolution of the crust-mantle system. Leningrad. Nauka, Leningrad. 300 pp.

Map:

Fig. 2_12. Lavrent’evskii (after Batieva, 1976, Fig. 10).

Location:

All locations > Europe > Russia > Kola And Karelia

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