stripes
Occurrence number:
136-18-005
Country:
Russia
Region:
Sette-Daban
Location:
Longitude: 136.38, Latitude: 59.75
Carbonatite:
Yes
Stocks, of up to 0.7 km2, and dykes of nepheline syenite and peralkaline syenites cut Sinian (Upper Proterozoic) terrigenous rocks. Many nests and veins of low-temperature carbonatites are known in the area. The alkaline rocks and carbonatites are concentrated along deep north-south-trending faults. Xenoliths of country rocks are preserved in the syenites and fenites are widespread. It is postulated that the intrusion has an area of 60 km2 at a depth of 2 km below the present surface.
References:
EPSTEIN, E.M., PANSHIN, I.P., MORALEV, V.M., VOLKODAV, I.G. 1972. On the vertical zonality of the massifs of the ultrabasic-alkaline rocks and carbonatites. In A.I. Ginzburg (ed) Geology of the ore deposits of the rare elements. 35: 49-69. Nedra. Moscow.
Location: