Science in China Series D: Earth Sciences

, Volume 50, Issue 9, pp 1281–1292 | Cite as

An accurately delineated Permian-Triassic Boundary in continental successions

  • Yin HongFu Email author
  • Yang FengQing 
  • Yu JianXin 
  • Peng YuanQiao 
  • Wang ShangYan 
  • Zhang SuXin 


The Permian-Triassic Boundary Stratigraphic Set (PTBST), characteristic of the GSSP section of Meishan and widespread in marine Permian-Triassic Boundary (PTB) sequences of South China, is used to trace and recognize the PTB in a continental sequence at Chahe (Beds 66f–68c). Diversified Permian plant fossils extended to the PTBST, and a few relicts survived above which they are replaced by gymnosperm pollen of Triassic aspect. In the nearby Zhejue Section, the continental PTBST is characterized by the fungal ‘spike’ recorded in many places throughout the world. The boundary claybeds (66f and 68a,c) of the PTBST are composed of mixed illite-montmorillonite layers analogous with those at Meishan. They contain volcanogenic minerals such as β quartz and zircon. U/Pb dating of the upper claybed gives ages of 247.5 and 252.6 Ma for Beds 68a and 68c respectively, averaging 250 Ma. In contrast to the situation in Xinjiang and South Africa, the sediment sequence of the Permian-Triassic transition in the Chahe section (Beds 56–80) become finer upward. Shallowing and coarsening upward is not, therefore, characteristic of the Permian-Triassic transition everywhere. The occurrence of relicts of the Gigantopteris Flora in the Kayitou Fm. indicates that, unlike most marine biota, relicts of this paleophytic flora survived into the earliest Triassic. It is concluded that Bed 67 at Chahe corresponds to Bed 27 at Meishan, and that the PTB should be put within the 60-cm-thick Bed 67b④, now put at its base tentatively. This is the most accurate correlation of the PTB in continental facies with that in the marine GSSP.


Permian-Triassic Boundary terrestrial sequence U-Pb age Chahe section accuracy 


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  1. 1.
    Yin H F, Zhang K X, Tong J N, et al. The Global Stratotype Section and Point (GSSP) of the Permian-Triassic Boundary. Episodes, 2001, 24: 102–114Google Scholar
  2. 2.
    Peng Y Q, Tong J N. High-resolution study on “boundary bed” of PTB in Yangtze Platform. Earth Sci—J China Univ Geosci (in Chinese with English abstract), 1999, 24: 39–48Google Scholar
  3. 3.
    Nanjing Institute of Geology and Palaeontology, Academia Sinica. Late Permian Coal-bearing Strata and Palaeontology Fauna in Western Guizhou and Eastern Yunnan (in Chinese). Beijing: Science Press, 1980. 1–277Google Scholar
  4. 4.
    Peng Y Q, Tong J N, Shi G R, et al. The Permian-Triassic Boundary Stratigraphic Set: characteristics and correlation. Newsl Stratigr, 2001, 39(1): 55–71Google Scholar
  5. 5.
    Wang S Y, Yin H F. Study on terrestrial Permian-Triassic boundary in Eastern Yunnan and Western Guizhou (in Chinese with English summary). Wuhan: China University of Geoscience Press, 2001. 87Google Scholar
  6. 6.
    Yin H F. On the Transitional Bed and the Permian-Triassic boundary in South China. Newsl Stratigr, 1985, 15(1): 13–27Google Scholar
  7. 7.
    Zhang S X, Peng Y Q, Yu J X, et al. Clayrocks of the terrestrial Permian-Triassic boundary of Chahe section, Weining, western Guizhou Province, South Cina: based on X-ray diffraction and scan electronic microscope. Geol Sci Technol Inf (in Chinese with English abstract), 2004, 23: 21–26Google Scholar
  8. 8.
    Li X X, Wu X Y. The Cathaysian and Gondwana floras: their contribution to determining the boundary between eastern Gondwana and Laurasia. J SE Asian Earth Sci, 1994, 9(4): 309–317CrossRefGoogle Scholar
  9. 9.
    Li X X. Floras in the Geological Periods of China (in Chinese). Guangzhou: Science and Technology Press of Guangdong, 1995. 144, 539.Google Scholar
  10. 10.
    Bureau of Geology and Mineral Resources of Guizhou Province. Regional geology of Guizhou Province. Geol. Memoir, Ministr. Geol Miner Resources, China, Ser. 1, No. 7 (in Chinese with English summary). Beijing: Geological Publishing House, 1987, 698Google Scholar
  11. 11.
    Peng Y Q, Yang F Q, Shi G R, et al. Correlating marine and non-marine Permian-Triassic boundary sections using high-resolution event-stratigratigraphy and biostratigraphy: an example from South China. Proceedings of XVth International Congress on Carboniferous and Permian Stratigraphy, Utrecht, The Netherlands, 2003. 395–396Google Scholar
  12. 12.
    Ouyang S, Utting J. Palynology of Upper Permian and Lower Triassic rocks, Meishan, Changxing county, Zhejiang Province, China. Rev Palaeobot Palyn, 1990, 66: 65–103CrossRefGoogle Scholar
  13. 13.
    Eshet Y, Rampino M R, Visscher H. Fungal event and palynological record of ecological crisis and recovery across the Permian-Triassic boundary. Geology, 1995, 23: 967–970CrossRefGoogle Scholar
  14. 14.
    Xie S C, Evershed R P. Peat molecular fossils recording paleoclimatic change and organism replacement. Chin Sci Bull, 2001, 46: 1749–1752CrossRefGoogle Scholar
  15. 15.
    Foster C B, Logan G A, Stephenson M H, ET AL. A revision of Reduviasporonites Wilson 1962: description, illustration, comparison and biological affinities. Palynology, 2002, 26, 35–58CrossRefGoogle Scholar
  16. 16.
    Ouyang S, Norris G. Earliest Triassic (Induan) spores and pollen from the Junggar Basin, Xinjiang, northwestern China. Rev Palaeobot Palyn, 1999, 106: 1–56CrossRefGoogle Scholar
  17. 17.
    Ouyang S. Late Permian and Early Triassic Palynological Assemblages in Fuyuan of Yunnan (in Chinese). Beijing: Science Press, 1986. 1–122Google Scholar
  18. 18.
    Chai C F, Zhou Y Q, Mao X Y, et al. Geochemical constraints on the Permo-Triassic boundary event in South China. In: Sweet W C, Yang Z Y, Dickins J M, et al. eds. Permo-Triassic Events in the Eastern Tethys. Cambridge: Cambridge University Press, 1992. 158–168Google Scholar
  19. 19.
    De Wit M J, Ghosh J G, de Villiers S C, et al. Multiple organic carbon isotope reversals across the Permo-Triassic Boundary of terrestrial Gondwana sequences: clues to extinction patterns and delayed ecosystem recovery. J Geol, 2002, 110: 227–240CrossRefGoogle Scholar
  20. 20.
    MacLeod K G, Smith R M H, Koch P L, et al. Timing of mammal-like reptile extinction across the Permian-Triassic boundary in South Africa. Geology, 2000, 28: 227–230CrossRefGoogle Scholar
  21. 21.
    Jin Y G, Wang Y, Wang W, et al. Pattern of marine mass extinction near the P-T boundary in South China. Science, 2000, 289: 432–436CrossRefGoogle Scholar
  22. 22.
    Becker L, Poreda R J, Junt A G, et al. Impact event at the Permian-Triassic Boundary: evidence from extra-terrestrial noble gasses in fullerenes. Science, 2001, 291: 1530–1533CrossRefGoogle Scholar
  23. 23.
    Mundil R, Ludwig K R, Metcalfe I, et al. Age and timing of the Permian mass exinctions: U/Pb dating of closed-systemzircons. Science, 2004, 305: 1760–1763CrossRefGoogle Scholar
  24. 24.
    Bowring S A, Erwin D H, Jin Y G, et al. U/Pb zircon geochronology and tempo of the end-Permian mass extinction. Science, 1998, 280: 1039–1045CrossRefGoogle Scholar
  25. 25.
    Wu Y L, Zhu H F, Zhu Z F, et al. Triassic Lithofacies, Paleogeography and Mineralization of South China (in Chinese with English abstract). Beijing: Geological Publishing House, 1999. 143Google Scholar
  26. 26.
    Smith R M H. Changing fluvial environments across the Permian-Triassic boundary in the Karoo Basin, South Africa and possible causes of tetrapod extinction. Palaeogeogra Palaeoclimatol Palaeoecol, 1995, 117: 81–104CrossRefGoogle Scholar
  27. 27.
    Ward P D, Montgomery D R, Smith R. Altered river morphology in South Africa related to the Permian-Triassic extinction. Science, 2000, 289: 1740–1743CrossRefGoogle Scholar
  28. 28.
    Institute of Geology, Chinese Academy of Geological Sciences and Institute of Geology, Xinjiang Bureau of Geology and Mineral Resources. Permian and Triassic strata and fossil assemblages in the Dalongkou area of Jimsar, Xinjiang. Geol Memoir, Ministr Geol Miner Resources, China (in Chinese with English abstract). 1986, 2(3): 262Google Scholar
  29. 29.
    Zhang K X, Tong J N, Yin H F, et al. Sequence stratigraphy near the Permian-Triassic boundary at Meishan section, South China. In: Yin H F ed. The Palaeozoic-Mesozoic Boundary, Candidates of Global Stratotype Section and Point of the Permian-Triassic Boundary. Wuhan: China University of Geosciences Press, 1996. 72–83Google Scholar
  30. 30.
    Yin H F, Tong J N. Late Permian-Middle Triassic sea level changes of Yangtze platform. J China Univ Geosci, 1996, 7: 101–105Google Scholar
  31. 31.
    Wang S Y, Yin H F. Discovery of microspherules in claystone near the terrestrial Permian-Triassic Boundary. Geol Rev (in Chinese with English abstract), 2001, 47: 411–414Google Scholar

Copyright information

© Science in China Press 2007

Authors and Affiliations

  • Yin HongFu 
    • 1
    Email author
  • Yang FengQing 
    • 2
  • Yu JianXin 
    • 2
  • Peng YuanQiao 
    • 1
  • Wang ShangYan 
    • 3
  • Zhang SuXin 
    • 1
  1. 1.Laboratory of Biological and Environmental GeologyChina University of GeosciencesWuhanChina
  2. 2.State Key Laboratory of Geological Process and Mineral ResourcesChina University of GeosciencesWuhanChina
  3. 3.Geological Survey of Guizhou ProvinceGuiyangChina

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