The eastern extension of the Avalonian terranes, the Prototethys and Paleotethys oceans

• Autorzy: Golonka Jan , Hung Khuong The , Du Nguyen Khac , Krobicki Michał
• Konferencja: Western Tethys meets Eastern Tethys - geodynamical, palaeoceanographical and palaeobiogeographical events : Second Symposium of the International Geoscience Programme IGCP 710 : 28th August - 3rd September, 2023, Kraków, Poland : abstract book
• Języki publikacji: EN

Abstrakty

EN

Avalonia was an archipelago of microcontinents divided into West and East Avalonia. West Avalonia included south-eastern parts of Nova Scotia, eastern Newfoundland, New Brunswick, Florida(?), and New England, while East Avalonia included southern Ireland, southern Scotland, England, northern France, the Brabant Massif, Lusatia, northern Germany, and north-western Poland. Several crustal fragments such as the Bruno–Silesia terrane, Moesian terranes, Istanbul/Zonguldak terrane constituted an extension of East Avalonia (Golonka et al., 2023). These microcontinents detached from Gondwana during the Early Paleozoic times. Golonka et al. (2023) also portrayed a chain of microcontinents moving away from Gondwana across the Palaeoasian (Protothetys) Ocean. These chain included Scythian, Turan, South Kazakhstan, Junggar, Tarim and Indochina. The Rheic-Palaeotethys Ocean opened behind these microcontinents. Collision occurred between Avalonia, Laurentia and Baltica during Caledonian Orogeny. This collision also included Bruno–Silesia, Moesia terranes, Istanbul/Zonguldak, Scythian and Turan terranes (Golonka & Gawęda, 2012). The events involving Junggar, South Kazakhstan and Tarim are more speculative. Indochina collided with South China along Song Ma– Truong Song–Ailaoshan suture during latest Silurian–earliest Devonian times. In northwestern Vietnam, the Late Silurian Song Chay complex granitoid is connected to this event. Moreover, the deep-water deposits such as Pa Ham formation were later replaced by shallow-water sedimentary formations, including the continental Lower Devonian red beds and Lower Devonian Nam Pia Formation composed mainly of terrigenous sediments and marl, medium-bedded to massive fine-grained limestone, representing shallow water sediments. The Lower Paleozoic greenschists of deepsea origin were unconformably covered in many localities by Devonian redbeds (Son et al., 1978; Hung, 2010; Hung et al., 2023).

Słowa kluczowe

EN

Avalonia; Prototethys; Palaeotethys

PL

Awalonia; protetyda; paleotyda

• Wydawca: Wydawnictwa AGH ; Stowarzyszenie Naukowe im. Stanisława Staszica
• Czasopismo: Geotourism / Geoturystyka
• Rocznik: 2023
• Tom: nr 1-2 (72-73)
• Strony: 23--24
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Golonka Jan

• AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Hung Khuong The

• Hanoi University of Mining and Geology, Hanoi, Vietnam

autor

Du Nguyen Khac

• Hanoi University of Mining and Geology, Hanoi, Vietnam

autor

Krobicki Michał

• AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland

Bibliografia

• [1] Golonka J. & Gawęda A., 2012. Plate tectonic evolution of the Southern margin of Laurussia in the Paleozoic. In: Sharkov, E. (ed.), Tectonics  – recent advances. Tech, Rijeka: 261–282.
• [2] Golonka J., Porębski S.J. & Waśkowska A., 2023. Silurian paleogeography in the framework of global plate tectonics. Palaeogeography, Palaeoclimatology, Palaeoecology, 622, 111597. https://doi.org/10.1016/j.palaeo.2023.111597.
• [3] Hung K.T., 2010. Overview of magmatism in northwestern Vietnam. Annales Societatis Geologorum Poloniae, 80(2): 185–226.
• [4] Hung K.T., Golonka, J. & Du, N.K., 2023. The collision between Indochina and South China blocks in northwestern Vietnam and its controversy. Journal of the Polish Mineral Engineering Society [in preparation].
• [5] Son P. (ed.), Thuc D.D., Thang N.D. & Ty T.V., 1978. Geological map of Vietnam at 1:200,000 scale. Son La sheet, with the explanatory note “Geology of the Son La sheet”. Geological Department of Vietnam, Ha Noi.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).