The name "Proto-Tethys" has been used inconsistently for several concepts for a supposed predecessor of the Paleo-Tethys Ocean, a palaeocean that separated the margins of Gondwana, often referred to as peri-Gondwana, from various continents and Gondwana-derived continental fragments from Precambrian times and onwards. According to von Raumer & Stampfli 2008, after the Cadomian orogenic events 550 Ma, the Proto-Tethys Ocean formed the eastern part of an oceanic domain (of which the Iapetus and Tornquist oceans formed the western parts) which subducted under the northern margins of Gondwana. In this model the Proto-Tethys separated the North China and Baltica continents from Gondwana.[1] In the Early Ordovician 500-480 Ma, the Proto-Tethys was subducted under Cadomia as a result of the Chamrousseback-arc basin.[2]Torsvik & Cocks 2009 used the name 'Ran Ocean' for a similar concept, the Cambrian-Ordovician ocean that separated Baltica from Gondwana.[3][4]
Other geologists dispute the existence of such an ocean.[5]
Palaeozoic evolutionEdit
The ocean formed when Pannotia disintegrated, Proto-Laurasia (Laurentia, Baltica, and Siberia) rifted away from a supercontinent that would become Gondwana. Proto-Tethys formed between these two supercontinents. The ocean was bordered by Panthalassic Ocean to the north, separating it from Panthalassa by island arcs and Kazakhstania. The Proto-Tethys expanded during the Cambrian. The ocean was at its widest during the Late Ordovician to Middle Silurian. The ocean was situated between the Siberia to the west, and Gondwana to the east. The ocean began to shrink during the Late Silurian, when North China, and South China moved away from Gondwana and headed north. In the late Devonian, the microcontinent of Kazakhstania collided with Siberia, shrinking the ocean even more. The ocean closed when the North China craton collided with Siberia-Kazakstania continent in the Carboniferous, while the Paleo-Tethys Ocean expanded.
Berra, F.; Angiolini, L. (2014). "The evolution of the Tethys region throughout the Phanerozoic: a brief tectonic reconstruction". In Marlow, L.; Kendall, C.; Yose, L. (eds.). Petroleum systems of the Tethyan region: AAPG Memoir. Vol. 106. pp. 1–27. doi:10.1306/13431840M1063606. ISBN9780891813866. Retrieved 21 November 2015.
Catalán, J. R. M.; Fernández-Suárez, J.; Jenner, G. A.; Belousova, E.; Montes, A. (2004). "Provenance constraints from detrital zircon U–Pb ages in the NW Iberian Massif: implications for Palaeozoic plate configuration and Variscan evolution". Journal of the Geological Society. 161 (3): 463–476. Bibcode:2004JGSoc.161..463C. CiteSeerX10.1.1.487.5815. doi:10.1144/0016-764903-054. S2CID 129477715.
Torsvik, T. H.; Cocks, L. R. M. (2009). "The Lower Palaeozoic palaeogeographical evolution of the northeastern and eastern peri-Gondwanan margin from Turkey to New Zealand" (PDF). Geological Society, London, Special Publications. 325 (1): 3–21. Bibcode:2009GSLSP.325....3T. doi:10.1144/sp325.2. S2CID 128490493. Retrieved 21 November 2015.
von Raumer, J. F.; Stampfli, G. M. (2008). "The birth of the Rheic Ocean—Early Palaeozoic subsidence patterns and subsequent tectonic plate scenarios" (PDF). Tectonophysics. 461 (1): 9–20. Bibcode:2008Tectp.461....9V. doi:10.1016/j.tecto.2008.04.012. Retrieved 21 November 2015.
External linksEdit
– at
– at
Early Carboniferous – at PaleoMap Project (North China microcontinent begins to collide with Siberia-Kazakstania continent closing the Proto-Tethys)
August 25, 2023
proto, tethys, ocean, proto, tethys, theic, ocean, ancient, ocean, that, existed, from, latest, ediacaran, carboniferous, contents, history, concept, palaeozoic, evolution, also, references, notes, sources, external, linkshistory, concept, editthe, name, proto. The Proto Tethys or Theic Ocean was an ancient ocean that existed from the latest Ediacaran to the Carboniferous 550 330 Ma Contents 1 History of concept 2 Palaeozoic evolution 3 See also 4 References 4 1 Notes 4 2 Sources 5 External linksHistory of concept EditThe name Proto Tethys has been used inconsistently for several concepts for a supposed predecessor of the Paleo Tethys Ocean a palaeocean that separated the margins of Gondwana often referred to as peri Gondwana from various continents and Gondwana derived continental fragments from Precambrian times and onwards According to von Raumer amp Stampfli 2008 after the Cadomian orogenic events 550 Ma the Proto Tethys Ocean formed the eastern part of an oceanic domain of which the Iapetus and Tornquist oceans formed the western parts which subducted under the northern margins of Gondwana In this model the Proto Tethys separated the North China and Baltica continents from Gondwana 1 In the Early Ordovician 500 480 Ma the Proto Tethys was subducted under Cadomia as a result of the Chamrousse back arc basin 2 Torsvik amp Cocks 2009 used the name Ran Ocean for a similar concept the Cambrian Ordovician ocean that separated Baltica from Gondwana 3 4 Other geologists dispute the existence of such an ocean 5 Palaeozoic evolution EditThe ocean formed when Pannotia disintegrated Proto Laurasia Laurentia Baltica and Siberia rifted away from a supercontinent that would become Gondwana Proto Tethys formed between these two supercontinents The ocean was bordered by Panthalassic Ocean to the north separating it from Panthalassa by island arcs and Kazakhstania The Proto Tethys expanded during the Cambrian The ocean was at its widest during the Late Ordovician to Middle Silurian The ocean was situated between the Siberia to the west and Gondwana to the east The ocean began to shrink during the Late Silurian when North China and South China moved away from Gondwana and headed north In the late Devonian the microcontinent of Kazakhstania collided with Siberia shrinking the ocean even more The ocean closed when the North China craton collided with Siberia Kazakstania continent in the Carboniferous while the Paleo Tethys Ocean expanded See also EditPaleo Tethys Ocean Tethys Ocean Rheic OceanReferences EditNotes Edit von Raumer amp Stampfli 2008 Introduction p 9 von Raumer amp Stampfli 2008 Fig 7a c Torsvik amp Cocks 2009 p 5 Berra amp Angiolini 2014 Cambrian late Cambrian about 500 Ma p 4 Catalan et al 2004 Fig 1 Sources Edit Berra F Angiolini L 2014 The evolution of the Tethys region throughout the Phanerozoic a brief tectonic reconstruction In Marlow L Kendall C Yose L eds Petroleum systems of the Tethyan region AAPG Memoir Vol 106 pp 1 27 doi 10 1306 13431840M1063606 ISBN 9780891813866 Retrieved 21 November 2015 Catalan J R M Fernandez Suarez J Jenner G A Belousova E Montes A 2004 Provenance constraints from detrital zircon U Pb ages in the NW Iberian Massif implications for Palaeozoic plate configuration and Variscan evolution Journal of the Geological Society 161 3 463 476 Bibcode 2004JGSoc 161 463C CiteSeerX 10 1 1 487 5815 doi 10 1144 0016 764903 054 S2CID 129477715 Torsvik T H Cocks L R M 2009 The Lower Palaeozoic palaeogeographical evolution of the northeastern and eastern peri Gondwanan margin from Turkey to New Zealand PDF Geological Society London Special Publications 325 1 3 21 Bibcode 2009GSLSP 325 3T doi 10 1144 sp325 2 S2CID 128490493 Retrieved 21 November 2015 von Raumer J F Stampfli G M 2008 The birth of the Rheic Ocean Early Palaeozoic subsidence patterns and subsequent tectonic plate scenarios PDF Tectonophysics 461 1 9 20 Bibcode 2008Tectp 461 9V doi 10 1016 j tecto 2008 04 012 Retrieved 21 November 2015 External links EditProto tethys ocean at global history Paleo Tethys and Proto Tethys at global history Early Carboniferous at PaleoMap Project North China microcontinent begins to collide with Siberia Kazakstania continent closing the Proto Tethys Retrieved from https en wikipedia org w index php title Proto Tethys Ocean amp oldid 1031936387, wikipedia, wiki, book, books, library,
