Stratigraphy of the area of Ukrainian Antarctic Akademik Vernadsky station
- Antarctic Peninsula,
- Graham Coast,
- Wilhelm Archipelago,
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
In 2019 and 2017, the authors performed field geological research on the Graham Coast of the Antarctic Peninsula. The studied area covered the western coast of the Kiev Peninsula and most of the adjacent islands of the Wilhelm Archipelago. The main objective of the study was to specify the stratigraphic column for the Ukrainian Antarctic Station (UAS) area, to determine the petrographic composition and lithological features of strata, to find out the features of their occurrence and the succession of accumulation. Research methods included: large-scale geological surveying and geological mapping. The main result was the development of a new stratigraphic scheme for the UAS area. The authors found that the studied stratigraphic column was composed of volcanic and subordinate terrigenous deposits. Their accumulation lasted in the time interval from late Palaeozoic to Cenozoic inclusive. The conclusions have been made about to the origin of studied strata, their ages and possible analogues in neighbouring territories. Lahille Island Formation (LIF) was recognized as the oldest lithostratigraphic unit of the studied area. Deep-sea turbid origin is assumed for the LIF terrigenous rocks. The TTL sedimentation age is limited by the time interval between the Late Permian and Early Triassic periods. On the basis of lithological features and geological age, TTL correlates with the Paradise Harbour formation belonging to the Trinity Peninsula Group. The most widespread lithostratigraphic unit of the study area is the volcanic strata of the Kiev Peninsula, which is a product island-arc volcanism associated with the Andean orogeny. The age of KPF volcanism is defined as Jurassic. It is found that the volcanic stratum of the Argentine Islands Formation (AIF) differs from the KPF by the petrographic composition, occurrence and features of stratification. It gave grounds to separate AIF into an independent lithostratigraphic unite. The age of AIF volcanism is limited by the time interval between the Jurassic and Cretaceous periods. According to lithological features and geological age, KPF and AIF were identified as the members of Antarctic Peninsula Volcanic Group. An assumption about the possible presence of the latest volcanogenic rocks of Neogene or even Quaternary age on the Argentinean Islands is made.
- Adie, R. J. 1957. The petrology of Graham Land: III. Metamorphic rocks of the Trinity Peninsula series. Falkland Islands Dependencies Survey Scientific reports, 20, 1-26.
- Bakhmutov, V.G., Gladkochub, D.P., Shpira, V.V. 2013. Age-related position, geodynemic specifics and paleomagnetism of intrusive complexes of the western coast of the Antarctic Peninsula. Geophysical Journal, 35, 3, 3-30.
- Barbeau, D.L., Davis, J.T., Murrey, K.E., Valencia, V., Gehrels, G.E., Zahid, K.M., Gombosi, D.J. 2010. Detrital-zircon geochronology of the metasedimentary rocks of north-western Graham Land. Antarctic Science, 22, 1, 65-78. https://doi.org/10.1017/S095410200999054X
- Burton-Johnson, A., Riley T. R. 2015. Autochthonous v. accreted terrane development of continental margins: a revised in situ tectonic history of the Antarctic Peninsula. Journal of the Geological Society, 172, 822-835. https://doi.org/10.1144/jgs2014-110
- Castillo P., Lacassie, J.P., Augustsson, C., Herve, F. 2015. Petrography and geochemistry of the Carboniferous-Triasic Trinity Peninsula Group, West Antarctica: implication for provenace and tectonic setting. Geological Magazine, 152, 4, 575-588. https://doi.org/10.1017/S0016756814000454
- Curtis, R. 1966. The petrology of the Graham Coast, Graham Land. British Antarctic Survey Scientific reports, 50, 1-51.
- Elliot, D. H. 1964. The petrology of the Argentine Islands. British Antarctic Survey Scientific Reports, 41, 31.
- Guenthner, W. R., Barbeau, D. L., Reiners, P. W., Thomson, S. N. 2010. Slab window migration and terrane accretion preserved by low-temperature termochronology of a magmatic arc, northern Antarctic peninsula. Geochemistry, Geophysics, Geosystems, 11, 3. https://doi.org/10.1029/2009GC002765
- Haselwimmer, C.E., Riley, T.R., Liu, J.G. 2010. Assesing the potintial of multispectral remote sensing for lithological mapping of the Antarctic Peninsula: case study from eastern Adelaide Island, Graham Land. Antarctic Science, 22(3), 299-318. https://doi.org/10.1017/S0954102010000015
- Haselwimmer, C.E., Riley, T.R., Liu, J.G. 2011. Lithologic maping in the Oscar II Coast area, Graham Land, Antarctic Peninsula using ASTER data. International Journal of Remote Sensing, 32, 7, 10, 2013-2035. https://doi.org/10.1080/01431161003645824
- Mytrokhyn, O., Bakhmutov, V., Boiarko, Y. 2018. First finding of fossiliferous siliceous rocks on Argentine Islands, West Antarctica. XII International Scientific Conference "Monitoring of Geological Processes and Ecological Condition of the Environment". Kyiv, 13-16 November, 2018, 4.
- Mytrokhyn, O., Bakhmutov, V. 2019. Geological research during 24-th Ukrainian Antarctic Expedition, January - April 2019: Graham Coast of Antarctic Peninsula and adjacent islands. XIII International Scientific Conference "Monitoring of Geological Processes and Ecological Condition of the Environment". Kyiv, 2019, 4.
- Nowell D. 2012. Geological maps from British Antarctic Survey. Geology today, 28, 5, 174-179. https://doi.org/10.1111/j.1365-2451.2012.00848.x
- Pankhurst, R. J. 1982. Rb-sr geochronology of Graham Land, Antarctica. Journal of the Geological Society, 139, 6, 701-711. https://doi.org/10.1144/gsjgs.139.6.0701
- Rex, D.C. 1976. Geochronology in relation to the stratigraphy of the Antarctic Peninsula. Bulletin of British Antarctic Survey, 43, 49-58.
- Riley, T.R., Flowerdew, M.J., Haselwimmer, C.C. 2011. Geological map of Eastern Graham Land, Antarctic Peninsula (1:625000 scale). BAS GEOMAPS 2 Series, sheet 1, British Antarctic Survey, Cambridge, UK.
- Storey, B.C., Vaughan, A.P.M., Millar, I.L. 1996. Geodynamic evolution of the Antarctic Peninsula during Mesozoic times and its bearing on Weddell Sea history. Geological Society, London, Special Publications, 108, 87-103. https://doi.org/10.1144/GSL.SP.1996.108.01.07
- Tangeman, J.A., Mukasa, S.B., Grunov, A.M. 1996. Zircon U-Pb geochronology of plutonic rocks from the Antarctic Peninsula: Confirmation on presence of unex posed Paleozoic crust. Tectonics, 15, 6, 1309-1324. https://doi.org/10.1029/96TC00840
- Thomson, M.R.A., Pankhurst, R.J. 1983. Age of post-Gondvanian calc-alkaline volcanism in the Antarctic Peninsular region. In Oliver L.R., James P.R. and Jago J.B. (eds). Antarctic Earth Science. Australian Academy of Science, Canberra, 328-333.
- Vaughan, A.P.M., Storey, B.C. 2000. The eastern Palmer Land shear zone: A new terrane accretion model for the Mesozoic development of the Antarctic Peninsula. Journal of the Geological Society, London, 157, 1243-1256. https://doi.org/10.1144/jgs.157.6.1243