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Geochronology of Pliocene volcanism in the Dzhavakheti Highland (the Lesser Caucasus). Part 1: Western part of the Dzhavakheti Highland

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Abstract

Isotopic-geochronological study of the Pliocene magmatic activity in western part of the Dzhavakheti Highland (northwestern region of the Lesser Caucasus) is carried out. The results obtained imply that the Pliocene magmatic activity lasted in this part of the highland approximately 2 million years from 3.75 to 1.75–1.55 Ma. As is established, the studied volcanic rocks correspond in composition mostly to K-Na subalkaline and more abundant normal basalts. Time constraints of main phases in development of basic volcanism within the study region are figured out. We assume that individual pulses of silicic to moderately silicic volcanism presumably took place in the Dzhavakheti Highland about 3.2 and 2.5 Ma ago.

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Authors and Affiliations

  1. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Moscow, Russia

    V. A. Lebedev & S. N. Bubnov

  2. A. Dzhanelidze Institute of Geology, Tbilisi, Georgia

    O. Z. Dudauri & G. T. Vashakidze

Authors
  1. V. A. Lebedev
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  2. S. N. Bubnov
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  3. O. Z. Dudauri
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  4. G. T. Vashakidze
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Additional information

Original Russian Text © V.A. Lebedev, S.N. Bubnov, O.Z. Dudauri, G.T. Vashakidze, 2008, published in Stratigrafiya. Geologicheskaya Korrelyatsiya, 2008, Vol. 16, No. 2, pp. 104–126.

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Lebedev, V.A., Bubnov, S.N., Dudauri, O.Z. et al. Geochronology of Pliocene volcanism in the Dzhavakheti Highland (the Lesser Caucasus). Part 1: Western part of the Dzhavakheti Highland. Stratigr. Geol. Correl. 16, 204–224 (2008). https://doi.org/10.1134/S0869593808020081

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  • DOI: https://doi.org/10.1134/S0869593808020081

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