Prototectonics of apatite-nepheline bodies in the Khibiny.
Abstract
Apatite-nepheline bodies in the Khibiny are spatially confined to an arc-shaped intrusion of ijolite-urtite. They are gently inclined to the center of the massif and occur in its hanging flank at the contact with ricechorrites and medium-grained nepheline syenites. The shape of ore bodies is lenticular-platform, their thickness is from 10-30 to 100-150 m, and their dip to the center of the massif is 25-50°. The largest among them Kukisvumchorr-Yuksporr and Rasvumchorr ore bodies are located in the southwestern part of the arc-shaped band of ijolite-urtites and form the Southwestern ore field (S.M. Kirov, Yuksporr, Apatite Circus, Centralny mines). 15 km to the north of the ore field is the Kuelpor-Lavoyok deposit, 5 km to the east is the Koashva ...
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