NEW DATA ON PETROGEOCHEMICAL RESEARCH OF PRE-ALPINE  QUARTZ DIORITES AND GRANITOIDS OF THE LOKI CRYSTALLINE  MASSIF (LESSER CAUCASUS)

Tamara Tsutsunava; Giorgi Beridze; Irakli Javakhishvili; Rezo Vekua

doi:10.52340/pajig.2024.136.02

Authors

Tamara Tsutsunava Tbilisi State University https://orcid.org/0000-0002-3546-3588
Giorgi Beridze Tbilisi State University https://orcid.org/0000-0002-9573-8600
Irakli Javakhishvili Tbilisi State University https://orcid.org/0000-0002-3250-3687
Rezo Vekua Tbilisi State University https://orcid.org/0009-0005-7801-9961

DOI:

https://doi.org/10.52340/pajig.2024.136.02

Keywords:

petrogeochemistry, pre-Alpine granitoids, the Lesser Caucasus

Abstract

The issues of geochemistry and genesis of the Upper Devonian quartz diorites and Late Variscan granitoids of the pre-Alpine basement of the Loki crystalline massif are discussed. According to I, S and A types of the geochemical classification of granits, quartz diorites belong to S and partly M type granites, and granitoids belong to S and I types. The chemical composition of granitoids corresponds to normal, mostly normal alkaline-acid rocks. The granitoids and quartz diorites of the massif are characterized by the signs of magmatic rocks of volcanogenic-arc origin, which indicates mainly the subduction conditions of their formation.

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Author Biographies

Tamara Tsutsunava, Tbilisi State University

Doctor of geological-mineralogical Sciences, Director of the Alexandre Janelidze Institute of Geology of Ivane Javakhishvili Tbilisi State University, Chief Scientist of the Department of Petrology, Mineralogy, Geochemistry and Lithology; Professor of the Department of Mineralogy-Petrology and Minerals, Department of Geology, Faculty of Exact and Natural Sciences, Ivane Javakhishvili Tbilisi State University.

Giorgi Beridze, Tbilisi State University

PhD of Geology, Senior Scientist of Complex Laboratory of Geological Research of Alexandre Janelidze Institute of Geology of Ivane Javakhishvili Tbilisi State University.

Irakli Javakhishvili, Tbilisi State University

PhD of Geology, Head of a Complex Laboratory of Geological Research of the Alexandre Janelidze Institute of Geology of Ivane Javakhishvili Tbilisi State Universit , Senior Researcher.

Rezo Vekua, Tbilisi State University

Master of geology, PhD Student, Engineer-geologist of Department of Petrology, Mineralogy, Geochemistry and Lithology of Alexandre Janelidze Institute of Geology of Ivane Javakhishvili Tbilisi State University.

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