Alkaline Rocks and Carbonatites of the World

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Vedi-Azatskii

stripes

Occurrence number: 
136-04-005
Country: 
Armenia
Location: 
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.

Economic: 
Rare earth, copper, molybdenum and mercury mineralization is associated with the complex.
Age: 
K-Ar determinations on rocks gave 12 Ma (Aslanyan, 1958).
References: 
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.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith