stripes
Occurrence number:
136-09-003
Country:
Russia
Region:
Enesei
Location:
Longitude: 90.08, Latitude: 60.77
Carbonatite:
No
Peralkaline syenites occupy an area of 0.5x0.7 km and are surrounded by alaskite granite. The syenite consists of microcline perthite (85%), aegirine replaced by amphibole (3-12%) and quartz (0.5%) with minor zircon, monazite, apatite, magnetite and fluorite.
Age:
K-Ar determinations on whole rocks gave 600-635 Ma (Datsenko, 1984.
References:
DATSENKO, V.M. 1984. Granitoid magmatism of the south-west margin of the Siberian Platform. Nauka, Novosibirsk. 120 pp.
NOZHKIN, A.D. and TROFIMOV, Yu.P. 1982. The peralkaline granite-syenite association of Srednevogovsky massif (Enisei ridge). In V.S. Sobolev (ed) Geology of coloured metal deposits from the folded margin of the Siberian Platform. 61-9. Nauka, Novosibirsk.
Location: