Active inversion tectonics, simple shear folding and back-thrusting at Rioni Basin, Georgia

Tibaldi, Alessandro; Alania, Victor; Bonali, Fabio Luca; Enukidze, O.; Tsereteli, Nino; Kvavadze, N.; Varazanashvili, O.

doi:10.1016/j.jsg.2017.01.005

Cited by 42 publications

(17 citation statements)

References 48 publications

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“…Although poorly constrained by FT data, geologic and geomorphic evidence indicate a relatively continuous zone of tectonic shortening, uplift, and exhumation along the southern slope of the western Greater Caucasus. This is exemplified by the Racha earthquake, by geomorphic studies at the outermost thrust front in the Rioni Basin (Tibaldi, Alania, et al, ; Tibaldi, Russo, et al, ) (Figure ), and by the presence of growth anticlines with antecedent drainage and wind gaps north of Suchumi (Figure ). This is within what has previously been modeled as stable Eurasia (Figure ).…”

Section: Discussionmentioning

confidence: 91%

Testing Models of Cenozoic Exhumation in the Western Greater Caucasus

Vincent¹,

Somin

Carter

et al. 2020

Tectonics

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• There is a marked lateral change in the Cenozoic cooling history of the crystalline core of the western Greater Caucasus • The region with young cooling ages (between Mt. Elbrus and Mt. Kazbek) coincides with an area of mantle-sourced Late Miocene and younger magmatism • If driven by buoyancy forces, cooling must be partitioned over short wavelengths by lithospheric heterogeneities Vincent et al.

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Section: Discussionmentioning

confidence: 91%

Testing Models of Cenozoic Exhumation in the Western Greater Caucasus

Vincent¹,

Somin

Carter

et al. 2020

Tectonics

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“…Progressive subaerial uplift and unroofing of the fill of the Greater Caucasus Basin occurred from the Oligocene onward (Lozar & Polino, ; Vincent, Hyden, et al, ; Vincent et al, ; Vincent et al, ) by thick‐skinned thrusting along previously rift related normal faults (Nemčok et al, ; Vincent et al, ). This was followed by thin‐skinned thrust deformation that propagated into the adjacent foreland basins, a process that continues to the present day (Forte et al, ; Mosar et al, ; Tibaldi et al, ; Vezzoli et al, ). The High Atlas, Morocco and the Pyrenees, France and Spain are examples of other mountain chains built by inversion tectonics of a rift, with initial thick‐ and later thin‐skinned thrust sheet development resulting in flexural basin formation on either side of an exhumed basin infill (e.g., Beauchamp et al, ; Beaumont et al, ; Muñoz, ).…”

Section: Geological Backgroundmentioning

confidence: 99%

Comment on “Relict Basin Closure and Crustal Shortening Budgets During Continental Collision: An Example From Caucasus Sediment Provenance” by Cowgill et al. (2016)

Vincent¹,

Saintot

Mosar

et al. 2018

Tectonics

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Plain Language Summary The southern slope of the Greater Caucasus mountains is the site of a former rift basin. In order to explain shortening deficits, plate deceleration, and the ~5 Ma reorganization of the Arabia‐Eurasia collision zone Cowgill et al. (2016) proposed that this basin closed ~5 Myrs ago. Within the western Greater Caucasus, at least, careful examination of sedimentological, provenance, and seismic data, however, supports an earlier ~35 Ma basin closure age. Basin closure cannot therefore be the driving mechanism for the ~5 Ma deceleration of the Arabian plate and reorganization of the Arabia‐Eurasia collision zone.

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“…The understanding of the southern flank also saw the emergence of mixed-mode and thin-skinned deformation models at the same time (e.g. Banks et al, 1997;Robinson et al, 1997;Nemčok et al, 2013;Tibaldi et al, 2017;Alania et al, 2020aAlania et al, ,b, 2021. There is a general consensus that the presentday Greater Caucasus is the result of a very large scale positive structural inversion of a Jurassic extensional basin system which may have had an average width of only 100-200 km (Banks et al, 1997;Saintot et al, 2006;Adamia et al, 2010Adamia et al, , 2017Nikishin et al, 2010;.…”

Section: Gr Eat Er Ca Uc Asu S Gr Eat Er Ca Uc Asu S Pa Ll a S H Ig H Pa Ll A S H Ig H K U R A B A S In K U Rmentioning

confidence: 99%

Exploration Plays in the Caucasus Region

Tari

Blackbourn

Boote³

et al. 2021

Journal of Petroleum Geology

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Exploration efforts around the Greater Caucasus region started towards the end of the 19th century and established a wide range of petroleum play types in various basin segments around the orogen. All these plays are associated with the flanks of the inverted thrust-fold belt and the adjacent foreland basin systems, but display significant variation among the basin segments depending on the tectonostratigraphic units involved and the degree of exploration maturity. Whereas the same main source rocks have generated most of the hydrocarbons in all the basins (namely organic-rich shales in the Oligocene -Lower Miocene Maykop Group and the Eocene Kuma Formation), it is primarily the trapping style, both proven and speculative, which is responsible for the broad spectrum of play types observed. Eleven play type diagrams across six main petroleum provinces of the Greater Caucasus region are presented in this paper and summarize the current exploration understanding of the existing discoveries and potential new play targets. These play cartoons offer a prospect-scale summary of both mature producing and underexplored basin segments in a coherent visual manner, and are therefore intended to promote future exploration efforts in the Caucasus region. The testing of new play types requires the proper risking of the two most critical elements in the region: hydrocarbon kitchen effectiveness, and post-charge trap modification. The de-risking of these factors will require properly designed, fit-for-purpose acquisition of modern geological and geophysical data sets.

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Active inversion tectonics, simple shear folding and back-thrusting at Rioni Basin, Georgia

Cited by 42 publications

References 48 publications

Testing Models of Cenozoic Exhumation in the Western Greater Caucasus

Testing Models of Cenozoic Exhumation in the Western Greater Caucasus

Comment on “Relict Basin Closure and Crustal Shortening Budgets During Continental Collision: An Example From Caucasus Sediment Provenance” by Cowgill et al. (2016)

Exploration Plays in the Caucasus Region

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