This massif is an intrusion covering about 10 km2. It is formed of a single intrusive phase, which is represented by nepheline-kalsilite monzonites, essexites and medium- and fine-grained syenites.
You are here
The Caucasus is an Alpine orogenic structure generated by collision between the Eurasian and Afro-Arabian plates, the area of contact being marked by the Lesser Caucasus ophiolite zone and intense volcanic activity. The Alpine alkaline volcanism in the Caucasus occurs in two distinct structural settings the first of which is palaeoceanic and characterised by volcano-sedimentary sequences which are closely associated with the ophiolites. In the second setting the alkaline rocks are associated with an intra-arc extensional regime and were emplaced immediately after the main stage of continental collision. The alkaline magmatism is essentially Eocene to Miocene in age and is principally developed in the countries of Armenia, Azerbai'an and Georgia (Fig. 2_50). The greatest contributions to our knowledge of the Caucasian alkaline rocks were made by Adamyan (1955), Aslanyan (1958), Bagdasaryan (1966), Gevorkyan (1965), Kotlyar (1939), Meliksetyan (1963a and 1963b) and Azizbekov et al. (1979).
The Bunduk intrusion is situated several kilometres northeast of the Tezhsar complex on the southern slope of the Bazumsky mountain range. This is a dyke-like body expanding at its eastern end to a width of 2 km. There are also several smaller bodies in the vicinity with areas up to 1 km2.