Alkaline Rocks and Carbonatites of the World

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Pkhrutskii

stripes

Occurrence number: 
013-00-001
Country: 
Azerbaijan
Location: 
Longitude: 48.17, Latitude: 38.85

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. The main rock-forming minerals are nepheline, kalsilite, orthoclase, andesine, augite, aegirine-augite and biotite. The rocks were strongly affected by metasomatic processes involving addition of sodalite and albite.

Age: 
K-Ar and Rb-Sr determinations gave 37 to 40 Ma (Bagdasaryan, 1966).
References: 
ADAMYAN, A.I. 1955. Petrography of the alkaline rocks of the Megrinsky region Armenian SSR. Akademii Nauk Armyanskoi SSR, Erevan. 102 pp. BAGDASARYAN, G.P. 1947. Nepheline syenites of the Pambaksky shield. Doklady Akademii Nauk Armyanskoi SSR. Erevan, 1: 19-35. BAGDASARYAN, G.P. 1954. Alkaline pegmatites of central Armenia. Doklady Akademii Nauk Armyanskoi SSR. Erevan, 19(4): 117-22. BAGDASARYAN, G.P. 1966. Intrusive rocks of the Basumo-Pambaksky region. In Geology of the Armenian SSR. Petrography. Intrusive rocks. 3: 256-308. Armenian Academy of Sciences, Erevan. GEVORKYAN, R.G. 1965. Geochemical peculiarities and petrogenesis of the alkaline rocks of central Armenia. Trudy, Moscow. 144 pp. KOCHINYAN, R.E. 1975. Mineralogy and geochemistry of the alkaline rocks of the Pamback. Akademii Nauk Armyanskoi SSR, Erevan. 175 pp. KOTLYAR, V.N. 1939. Discovery of the leucitic rocks in the Caucasus. Sovetskaya Geologiya, 4-5: 4-11. MELIKSETYAN, B.M. 1963b. Mineralogical geochemical peculiarities of the alkaline rocks of the Magrinsky pluton. Ivestiya Akademii Nauk Armyanskoi SSR, Erevan, 2: 57-80. MELIKSETYAN, B.M. 1971. Mineralogy, geochemistry and petrological peculiarities of the Tezhsarskii complex. In Petrology of the intrusive complexes of the important regions of the Armenian SSR. 117-308. Akademii Nauk Armyanskoi SSR, Erevan. TATEVOSYAN, T.Sh. 1966. Intrusive rocks of the Bargushatsk ridge. In Geology of the Armenian SSR. Petrography. Intrusive rocks, 3: 114-214. Akademii Nauk Armyanskoi SSR, Erevan.
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