stripes
Occurrence number:
136-16-002
Country:
Russia
Region:
Primorye
Location:
Longitude: 135.2, Latitude: 45.83
Carbonatite:
No
Numerous stocks and dykes of alkaline syenites cut schists and siltstones of upper and middle Carboniferous age. The alkaline syenites are medium- and coarse-grained rocks with trachytic textures. They consist of K-feldspar, albite, aegirine and alkali amphibole. There is a little biotite and accessory anatase, ilmenorutile and titanomagnetite. There is extensive secondary replacement of the alkaline syenites by albite, muscovite and sericite.
Age:
K-Ar on alkaline syenites gave 150 and 137 Ma.
References:
KOTLYUR, S.G. 1968. North-east and Far East. In Yu.I. Polovinkina (ed) Geological structures of the USSR. 3 Magmatism. Nedra, Moscow. 640 pp.
Location: