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Papers by Tamar Beridze

Research paper thumbnail of Quaternary Volcanic Activity in the Greater Caucasus: A Review of Elbrus, Kazbek and Keli Volcanoes

Building Knowledge for Geohazard Assessment and Management in the Caucasus and other Orogenic Regions, 2021

Research paper thumbnail of Correlation of the Main Tectonic Units and Paleotectonic Reconstructions of the Eastern Black Sea - Caucasian - South Caspian Region

EGU General Assembly Conference Abstracts, Apr 1, 2018

Research paper thumbnail of Eastern Black Sea - Achara-Trialeti Cretaceous -Eocene Intra-arc rift structure: new evidences

EGU General Assembly Conference Abstracts, Apr 1, 2019

Research paper thumbnail of Thrust-Top Basins Examples Within Georgian Part of the Kura Foreland Fold-And-Thrust Belt, Georgia: Review

Research paper thumbnail of Upper Cretaceous Kachagiani (Sakdrisi) Ore deposit host rocks analysis, Bolnisi ore field, Georgia

Research paper thumbnail of Trace Fossils from Deep Sea Sediments of the Palaeocene-Lower Eocene Borjomi Suite Exposed in the Eastern Part of the Achara-Trialeti Fold-Thrust Belt, Georgia

Research paper thumbnail of Structural and Stratigraphic Architecture in Paleogene Extensional Sedimentary Basin: An Example from the Eastern Achara-Trialeti Fold-And-Thrust Belt, Georgia

Research paper thumbnail of Prehistoric Metallurgy in Mountainous Colchis (Lechkhumi)

The present paper is an introduction to our new archaeometallurgical research project and gives a... more The present paper is an introduction to our new archaeometallurgical research project and gives a brief overview and context to the recent results of exploratory fieldwork and some excavation conducted in the Lechkhumi region of mountainous Colchis (in particular the Tsageri Municipally of this part of West Georgia,) and their place in an already established archaeological context. Lechkhumi is one of the historic provinces of West Georgia and because of archaeological metalwork finds here forms a significant part of the known Colchian bronze culture and is now considered to be an important centre of prehistoric copper and bronze metallurgy. However, Lechkhumi has been archaeologically perhaps the least studied region in Georgia so far. Current interdisciplinary investigations of the late Bronze Age copper sites of Lechkhumi region is an attempt to establish and assess the significance of the region and its place in the contemporary metallurgical production and culture of this part ...

Research paper thumbnail of Structural geometry of active Kura foreland fold-and-thrust belt revealed by seismic reflection profiles

Research paper thumbnail of The place of the Bolnisi ore district, Georgia in the Tethyan-Eurasian metallogenic belt and peculiarities of its mineralization

Research paper thumbnail of Phanerozoic Metallogeny of the Caucasus Region during the Tethys Ocean Subduction and at the Post-Collision Stage

The interrelation of geodynamic development, volcanic activity and metallogeny of the Caucasus re... more The interrelation of geodynamic development, volcanic activity and metallogeny of the Caucasus region is determined by subduction at the pre-collision stage, as well as by synorogenic magmatic activity at post-collision setting. Pre-collisional development at the normal subduction stage includes island arc setting, calc-alkaline volcanism and gold-copper-base metal mineralization. Transformation of subducting slab (roll back, break off, detachment and delamination) was related to mantle diapir and spreading revealed in back/inter-arc settings. It resulted in tholeiite-alkali olivine basalt and shoshonitic volcanic activity and in copper-zinc-pyrite mineralization as well. In the course of a strengthening the diapir incursion the back-arc transformed into a small ocean basin, where ophiolite volcanism and copper-pyrite mineralization occurred. Transformation of subducting slab (TSS) took place along its dip and laterally as well, which mainly manifested itself in modes of geodynamic ...

Research paper thumbnail of The Late Bronze Age Archeometallurgy of Copper in Mountainous Colchis (Lechkhumi), Georgia

Research paper thumbnail of Impact of Magmatism on the Geodynamic Evolution of Southern Georgia on the Example of the Lesser Caucasus Artvin-Bolnisi Block

Magmatic evolution is an important event in the formation and development of the geological struc... more Magmatic evolution is an important event in the formation and development of the geological structure of Southern Georgia, where several reliably dated volcanogenic and volcanogenic-sedimentary formations are established. The region represents a modern analogue of continental collision zone, where subduction-related volcanic activity lasted from Paleozoic to the end of Paleogene. After the period of dormancy in the Early-Middle Miocene starting from the Late Miocene and as far as the end of the Pleistocene, primarily subaerial volcanic eruptions followed by formation of volcanic highlands and plateaus occurred in the reigon. The Upper Miocene to Holocene volcanic rocks are related to the transverse Van–Transcaucasian uplift and belong to post-collisional calcalkaline basalt–andesite–dacite–rhyolite series.

Research paper thumbnail of The Geometry of the Two Orogens Convergence and Collision Zones in Central Georgia: New Data from Seismic Reflection Profiles

Building Knowledge for Geohazard Assessment and Management in the Caucasus and other Orogenic Regions, 2021

Research paper thumbnail of Abundant trace fossil Polykampton in Palaeogene deep-sea flysch deposits of the Lesser Caucasus in Georgia: Palaeoecological and palaeoenvironmental implications

Palaeogeography, Palaeoclimatology, Palaeoecology, 2020

Research paper thumbnail of Structural Architecture of the Kura Foreland Fold-and-thrust Belt Using Seismic Reflection Profile, Georgia

Universal Journal of Geoscience, 2018

Research paper thumbnail of Sedimentary Features Related to Cretaceous Host-rock Succession of Madneuli Cu-Au Deposit-Useful Criteria for Stratigraphic Correlations and Basin Analysis.Presentation

Research paper thumbnail of Balanced cross-section across Kartli foreland thrust and fold belt: implications for the timing and kinematics modelling (south-east Georgia)

Research paper thumbnail of Newly Discovered Monuments of the Ancient Iron Metallurgy: Research Perspective and Expected Outcomes

NEWLY DISCOVERED MONUMENTS OF THE ANCIENT IRON METALLURGY: RESEARCH PERSPECTIVE AND EXPECTED OUTC... more NEWLY DISCOVERED MONUMENTS OF THE ANCIENT IRON METALLURGY: RESEARCH PERSPECTIVE AND EXPECTED OUTCOMES Nino Sulava, Rusudan Chagelishvili, Nino Kalandadze, Tamar Beridze (Tbilisi - Georgia) Key-words: Colchis, Metallurgy, Iron, Slag, Ore. Abstract: The Colchis culture including its local centers and infiltration zones, spread on the eastern coast of the Black Sea originated on a strong copper-bronze and iron metallurgy base, which has been recently confirmed by one more new discovery. Based on the investigation of artifacts (coating furnace fragments, snuffs, slags) collected in mountainous Colchis (Lechkhumi) by non-destructive XRF (X-ray fluorescence spectroscope ELVAX) method was determined the highest content of iron (80-95%), in the slag samples relatively to other metals. In one slag sample has been detected high content of copper- 41%, which allows us, to assume the simultaneous existence of iron and copper smelting furnace-workshops. In case of confirmation of our assumption ...

Research paper thumbnail of Facies Analysis of the Volcano-Sedimentary Host Rocks of the Cretaceous Madneuli Massive Sulphide Deposit, Bolnisi District, Georgia

Bull. Georg. Natl. …, 2009

ABSTRACT. The Cretaceous Madneuli barite-gold-copper-pollymetallic deposit is a major deposit of ... more ABSTRACT. The Cretaceous Madneuli barite-gold-copper-pollymetallic deposit is a major deposit of the Georgian Bolnisi mining district, located in the Artvin-Bolnisi zone. This contribution presents a detailed lithofacies analysis of volcanic host rocks of the Madneuli ...

Research paper thumbnail of Quaternary Volcanic Activity in the Greater Caucasus: A Review of Elbrus, Kazbek and Keli Volcanoes

Building Knowledge for Geohazard Assessment and Management in the Caucasus and other Orogenic Regions, 2021

Research paper thumbnail of Correlation of the Main Tectonic Units and Paleotectonic Reconstructions of the Eastern Black Sea - Caucasian - South Caspian Region

EGU General Assembly Conference Abstracts, Apr 1, 2018

Research paper thumbnail of Eastern Black Sea - Achara-Trialeti Cretaceous -Eocene Intra-arc rift structure: new evidences

EGU General Assembly Conference Abstracts, Apr 1, 2019

Research paper thumbnail of Thrust-Top Basins Examples Within Georgian Part of the Kura Foreland Fold-And-Thrust Belt, Georgia: Review

Research paper thumbnail of Upper Cretaceous Kachagiani (Sakdrisi) Ore deposit host rocks analysis, Bolnisi ore field, Georgia

Research paper thumbnail of Trace Fossils from Deep Sea Sediments of the Palaeocene-Lower Eocene Borjomi Suite Exposed in the Eastern Part of the Achara-Trialeti Fold-Thrust Belt, Georgia

Research paper thumbnail of Structural and Stratigraphic Architecture in Paleogene Extensional Sedimentary Basin: An Example from the Eastern Achara-Trialeti Fold-And-Thrust Belt, Georgia

Research paper thumbnail of Prehistoric Metallurgy in Mountainous Colchis (Lechkhumi)

The present paper is an introduction to our new archaeometallurgical research project and gives a... more The present paper is an introduction to our new archaeometallurgical research project and gives a brief overview and context to the recent results of exploratory fieldwork and some excavation conducted in the Lechkhumi region of mountainous Colchis (in particular the Tsageri Municipally of this part of West Georgia,) and their place in an already established archaeological context. Lechkhumi is one of the historic provinces of West Georgia and because of archaeological metalwork finds here forms a significant part of the known Colchian bronze culture and is now considered to be an important centre of prehistoric copper and bronze metallurgy. However, Lechkhumi has been archaeologically perhaps the least studied region in Georgia so far. Current interdisciplinary investigations of the late Bronze Age copper sites of Lechkhumi region is an attempt to establish and assess the significance of the region and its place in the contemporary metallurgical production and culture of this part ...

Research paper thumbnail of Structural geometry of active Kura foreland fold-and-thrust belt revealed by seismic reflection profiles

Research paper thumbnail of The place of the Bolnisi ore district, Georgia in the Tethyan-Eurasian metallogenic belt and peculiarities of its mineralization

Research paper thumbnail of Phanerozoic Metallogeny of the Caucasus Region during the Tethys Ocean Subduction and at the Post-Collision Stage

The interrelation of geodynamic development, volcanic activity and metallogeny of the Caucasus re... more The interrelation of geodynamic development, volcanic activity and metallogeny of the Caucasus region is determined by subduction at the pre-collision stage, as well as by synorogenic magmatic activity at post-collision setting. Pre-collisional development at the normal subduction stage includes island arc setting, calc-alkaline volcanism and gold-copper-base metal mineralization. Transformation of subducting slab (roll back, break off, detachment and delamination) was related to mantle diapir and spreading revealed in back/inter-arc settings. It resulted in tholeiite-alkali olivine basalt and shoshonitic volcanic activity and in copper-zinc-pyrite mineralization as well. In the course of a strengthening the diapir incursion the back-arc transformed into a small ocean basin, where ophiolite volcanism and copper-pyrite mineralization occurred. Transformation of subducting slab (TSS) took place along its dip and laterally as well, which mainly manifested itself in modes of geodynamic ...

Research paper thumbnail of The Late Bronze Age Archeometallurgy of Copper in Mountainous Colchis (Lechkhumi), Georgia

Research paper thumbnail of Impact of Magmatism on the Geodynamic Evolution of Southern Georgia on the Example of the Lesser Caucasus Artvin-Bolnisi Block

Magmatic evolution is an important event in the formation and development of the geological struc... more Magmatic evolution is an important event in the formation and development of the geological structure of Southern Georgia, where several reliably dated volcanogenic and volcanogenic-sedimentary formations are established. The region represents a modern analogue of continental collision zone, where subduction-related volcanic activity lasted from Paleozoic to the end of Paleogene. After the period of dormancy in the Early-Middle Miocene starting from the Late Miocene and as far as the end of the Pleistocene, primarily subaerial volcanic eruptions followed by formation of volcanic highlands and plateaus occurred in the reigon. The Upper Miocene to Holocene volcanic rocks are related to the transverse Van–Transcaucasian uplift and belong to post-collisional calcalkaline basalt–andesite–dacite–rhyolite series.

Research paper thumbnail of The Geometry of the Two Orogens Convergence and Collision Zones in Central Georgia: New Data from Seismic Reflection Profiles

Building Knowledge for Geohazard Assessment and Management in the Caucasus and other Orogenic Regions, 2021

Research paper thumbnail of Abundant trace fossil Polykampton in Palaeogene deep-sea flysch deposits of the Lesser Caucasus in Georgia: Palaeoecological and palaeoenvironmental implications

Palaeogeography, Palaeoclimatology, Palaeoecology, 2020

Research paper thumbnail of Structural Architecture of the Kura Foreland Fold-and-thrust Belt Using Seismic Reflection Profile, Georgia

Universal Journal of Geoscience, 2018

Research paper thumbnail of Sedimentary Features Related to Cretaceous Host-rock Succession of Madneuli Cu-Au Deposit-Useful Criteria for Stratigraphic Correlations and Basin Analysis.Presentation

Research paper thumbnail of Balanced cross-section across Kartli foreland thrust and fold belt: implications for the timing and kinematics modelling (south-east Georgia)

Research paper thumbnail of Newly Discovered Monuments of the Ancient Iron Metallurgy: Research Perspective and Expected Outcomes

NEWLY DISCOVERED MONUMENTS OF THE ANCIENT IRON METALLURGY: RESEARCH PERSPECTIVE AND EXPECTED OUTC... more NEWLY DISCOVERED MONUMENTS OF THE ANCIENT IRON METALLURGY: RESEARCH PERSPECTIVE AND EXPECTED OUTCOMES Nino Sulava, Rusudan Chagelishvili, Nino Kalandadze, Tamar Beridze (Tbilisi - Georgia) Key-words: Colchis, Metallurgy, Iron, Slag, Ore. Abstract: The Colchis culture including its local centers and infiltration zones, spread on the eastern coast of the Black Sea originated on a strong copper-bronze and iron metallurgy base, which has been recently confirmed by one more new discovery. Based on the investigation of artifacts (coating furnace fragments, snuffs, slags) collected in mountainous Colchis (Lechkhumi) by non-destructive XRF (X-ray fluorescence spectroscope ELVAX) method was determined the highest content of iron (80-95%), in the slag samples relatively to other metals. In one slag sample has been detected high content of copper- 41%, which allows us, to assume the simultaneous existence of iron and copper smelting furnace-workshops. In case of confirmation of our assumption ...

Research paper thumbnail of Facies Analysis of the Volcano-Sedimentary Host Rocks of the Cretaceous Madneuli Massive Sulphide Deposit, Bolnisi District, Georgia

Bull. Georg. Natl. …, 2009

ABSTRACT. The Cretaceous Madneuli barite-gold-copper-pollymetallic deposit is a major deposit of ... more ABSTRACT. The Cretaceous Madneuli barite-gold-copper-pollymetallic deposit is a major deposit of the Georgian Bolnisi mining district, located in the Artvin-Bolnisi zone. This contribution presents a detailed lithofacies analysis of volcanic host rocks of the Madneuli ...

Research paper thumbnail of Major volcano-sedimentary facies types of the Madneuli polymetallic deposit, Bolnisi district, Georgia: Implications for the host rock depositional environment

The Madneuli polymetallic deposit is the major deposit of the Bolnisi ore district in the southea... more The Madneuli polymetallic deposit is the major deposit of the Bolnisi ore district in the southeastern part of Georgia, which is in production since the 70's. The Bolnisi district is part of the Lesser Caucasus; it extends towards the west in the Eastern Pontides, Turkey. The origin of the Madneuli deposit is still controversial. Our study is based on physical volcanology and sedimentary basin analyses. Eleven principal volcanic and volcano-sedimentary facies types were identified within the Madneuli open pit based on their composition, texture, volcanic and sedimentary structures. The presence of various submarine sedimentary structures, hyaloclastite and turbiditic rocks and Radiolaria described for the first time within the host rocks of the Madneuli open pit, supports the submarine depositional setting for the volcano-sedimentary succession hosting the Madneuli deposit.

Research paper thumbnail of TEXTURES AND COMPOSITION OF KAZBEGI BASALT BRECCIA (THE GREAT CAUCASUS, GEORGIA) AS RECOGNITION FEATURES OF HIGH-QUALITY FACING AND ORNAMENTAL STONE

The object of our research is Kazbegi basalt breccia. The deposit of this high quality facing and... more The object of our research is Kazbegi basalt breccia. The deposit of this high quality facing and ornamental stone is located in headwaters of the river Devdoraki (the left tributary of the river Tergi) gorge, on the northern slope of the Main Range Zone of the Great Caucasus(one of the major tectonic units of Georgia)and is only partly exposed from under the glacier cover. The complicated ragged topography and lack of roads makes the primary deposit inaccessible for its exploitation. At present alluvial-glacial piles of basalt-breccia boulder blocks in the lower reaches of the river Devdorak is being quarried (total reserves 61300m 3). Kazbegi basalt-breccia is a green rock with breccia texture where large basaltic clasts are cemented by fine-grained epidote, calite and quartz mass resulted in formation of rather attractive decorative pattern of the rock and high demand on this rock as a raw material taking into account its good physical-mechanical properties[1] as well. It is though suggested that the Kazbegi basalt-breccia should be used more for lining of buildings' interiors and manufacturing of decorative items and mini-architectural artworks.As the similar type rock-formations are widespread in the region. The subject of precise recognition of the Kazbegi basalt-breccia textures and composition has become extremely essential. Thin section petrography of the breccia clasts and matrix, whole rock geochemistry and X-ray analysis have been conducted with the emphasis on alteration processes, mineralogical composition and textural features which stipulate special decorative pattern of basalt-breccia. According to previous data the rock was interpreted as epidote bearing breccia-like diabase or 'decorative diabase'. Based on our petrographic study the breccia-clasts (1-50cm.) have typical for basalts aphyric texture in contrast to diabase which is characterized by ophytic textures. This observation and chemical analyses results established that the rock corresponds to basalt; therefore the rock has been introduced as basalt-breccia [Fig.1].

Research paper thumbnail of Impact of Magmatism on the Geodynamic Evolution of Southern Georgia on the Example of the Lesser Caucasus Artvin-Bolnisi Block

The Georgian region occupies the central part of the collisional zone between the Eurasian and Af... more The Georgian region occupies the central part of the collisional zone between the Eurasian and Africa-Arabian continents and is actually a collage of lithospheric fragments of the Tethyan Ocean and its northern and southern continental margins. Magmatic evolution is an important event in the formation and development of the geological structure of Southern Georgia, where several reliably dated volcanogenic and volcanogenic-sedimentary formations are established. The region represents a modern analogue of continental collision zone, where subduction-related volcanic activity lasted from Paleozoic to the end of Paleogene. After the period of dormancy in the Early-Middle Miocene starting from the Late Miocene and as far as the end of the Pleistocene, primarily subaerial volcanic eruptions followed by formation of volcanic highlands and plateaus occurred in the reigon. The Upper Miocene to Holocene volcanic rocks are related to the transverse Van–Transcaucasian uplift and belong to post-collisional calc-alkaline basalt–andesite–dacite–rhyolite series. A system of island arc and intra-arc rift basins (Artvin-Bolnisi and Achara-Trialeti) have been interpreted as characteristic of the pre-collisional stage of the region development, while syn-post-collisional geodynamic events have been attributed to intracontinental stage. Outcrops of the postcollisional magmatic rocks are exposed along the boundaries of the major tectonic units of the region. The Artvin-Bolnisi unit forms the northwestern part of the Lesser Caucasus and represents an island arc domain of so called the Somkheto-Karabakh Island Arc or Baiburt-Garabagh-Kapan belt. It was formed mainly during the Jurassic-Eocene time interval on the southern margin of the Eurasian plate by nort-dipping subduction of the Neotethys Ocean and subsequent collision to the Anatolia-Iranian continental plate. The Artvin-Bolnisi unit, including the Bolnisi district, was developing as a relatively uplifted island arc-type unit with suprasubduction extrusive and intrusive events. Volcanogenic complexes are characterized by variable lateral and vertical regional stratigraphic relationships and are subdivided into several formations, dominated by volcanic rocks: basalts, andesites, dacites, and rhyolites of calc-alkaline-subalkaline series. Volcanic rocks are of shallow-marine to subaerial type. The peculiarities of magmatic activity and geodynamic development of the region stipulated synchronous formation of significant base and precious metals deposits of the Bolnisi ore district.