stripes
Occurrence number:
136-19-001
Country:
Russia
Region:
Taimyr Peninsula
Location:
Longitude: 95.9, Latitude: 75.52
Carbonatite:
No
This intrusion is located in the vicinity of the rivers Kolomeitseva and Mamont to the north of the Birranga ridge. It lies within a granitoid batholith of lower Devonian age in the contact zone of leucocratic granites. It is oval in plan, covers about 8 km2 and is composed of coarse-grained syenite, syenite porphyry, trachyte and alkaline syenites with nepheline, although the quantity of nepheline (up to 5%) in the last is low.
Age:
The K-Ar method gave 200 Ma.
References:
DAMINOVA, A.M. 1963. Alkaline rocks of central Taimyr. Trudy, Patricia Lumumba University of Peoples Friendship, Moscow, 3(1): 3-48.
Location: