Alkaline Rocks and Carbonatites of the World

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Occurrence number: 
Longitude: 45, Latitude: 39.98

This complex is developed within the Vedi-Azat volcanic formation. It consists exclusively of volcanic and subvolcanic intrusions including sills, dykes, laccoliths and small stocks, amongst which, in a central position, are a number of volcanic necks that are circular in section and up to 1 km2. The rocks of the suite comprise a series from alkali olivine basalts through trachyte and trachyandesite to leucite syenite porphyry and leucite phonolite.

Rare earth, copper, molybdenum and mercury mineralization is associated with the complex.
K-Ar determinations on rocks gave 12 Ma (Aslanyan, 1958).
ASLANYAN, A.T. 1958. Regional geology of Armenia. Aipetrat, Erevan. 430 pp. GABRIELYAN, A.A., BAGDASARYAN, G.P.,KARAPETYAN, K.I., MELIKSETYAN, B.M., MELKONYAN, P.L. and MNATSAKANYAN,A.C. 1968. Main stages of geotectonic development and magmatic activity on the territory of the Armenian SSR. Ivestiya Akademii Nauk Armyanskoi SSR, Seriya Nauk o Zemle, Erevan. 21: 6-39. OSTROUMOVA, A.S. 1967. A basalt-trachyte formation of the Small Caucasus. In Alkaline volcanological formations of folded regions. 64-76. Nedra, Leningrad.
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