Characteristics and Significance of Carbon and Oxygen Isotopic Compositions of the PTB Boundary in Haidai Section, Xuanwei Area of China

Authors

  • Chenming Liu

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China

  • Demin Yang

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China

  • Zhengqin Na

    Yunnan Wuyuan Technology Co., Ltd., Kunming 650027, China

DOI:

https://doi.org/10.30564/jees.v7i5.8500
Received: 20 January 2025 | Revised: 26 February 2025 | Accepted: 5 March 2025 | Published Online: 6 May 2025

Abstract

The End-Permian mass extinction (EPME), Earth's most severe biocrisis, occurred proximal to the Permian-Triassic Boundary (PTB), with marine ecosystems experiencing catastrophic collapse. This study employs stable carbon (δ¹³C) and oxygen isotopes from marine carbonates in the Haidai Section (Xuanwei, northeastern Yunnan) to decipher paleoenvironmental drivers. The well-preserved stratigraphic sequence encompasses the Upper Permian (Yangxin and Xuanwei Formations) transitioning into the Lower Triassic (Feixianguan and Jialingjiang Formations), providing a continuous marine sedimentary archive. A marked negative δ¹³C excursion (-9.66‰ V-PDB) occurs at the PTB, initiating from +0.82‰ with subsequent gradual recovery. This geochemical signature correlates with: 90% reduction in primary productivity Biodiversity collapse exhibiting cluster extinction patterns Prolonged suppression of ecological recovery Concurrently, reconstructed seawater temperatures reveal extreme thermal fluctuations, surging from 23℃ to 32℃ at the PTB before precipitously declining to 16℃. These perturbations demonstrate coupled biogeochemical dynamics wherein: • Carbon cycle destabilization disrupted nutrient fluxes • Temperature oscillations exceeded marine taxa thermal tolerances • Synergistic environmental stresses amplified extinction selectivity The δ¹³C-temperature covariance (r²=0.085) establishes mechanistic linkages between physicochemical perturbations and biotic responses. Our findings demonstrate that the EPME was driven by positive feedback loops in which: Volcanic CO₂ emissions triggered carbonate saturation decline Thermal stratification exacerbated anoxia Biogeochemical cycling perturbations suppressed primary producers This integrated geochemical record from the Haidai Section provides critical insights into environment-organism coevolution during Phanerozoic Earth's most profound mass extinction.

Keywords:

Carbon and Oxygen Isotope; Northeastern Yunnan; Xuanwei; PTB; ELIP; Mass Extinction

References

[1] Benton, M.J., Twitchett, R.J., 2003. How to kill (almost) all life: The end-Permian extinction event. Trends in Ecology & Evolution. 18(7), 358–365. DOI: https://doi.org/10.1016/S0169-5347(03)00093-4

[2] Erwin, D.H., 1994. The Permo-Triassicextinction. Nature. 367, 231–236.

[3] Erwin, D.H., Bowring, S.A., Jin, Y., 2002. End-Permian mass extinctions: A review. Special Paper of the Geological Society of America. 356, 363–383.

[4] Rong, J., Huang, B., 2023. The first brachiopod fauna after the late ordovician mass extinction: Evidence from silicified brachiopods at the top of the ordovician in Zhenxiong, Northeastern Yunnan. Acta Palaeontologica Sinica. 62(01), 1–29. DOI: https://doi.org/10.19800/j.cnki.aps.2022036

[5] Payne, J.L., Lehrmann, D.J., Wei, J., et al., 2004. Large perturbations of the carbon cycle during recovery from the end-Permian extinction. Science. 305, 506–509.

[6] Huang, E., 1994. Carbon isotope composition of marine carbonate rocks of the Permian-Triassic boundary at Shangchangzi and biological extinction events. Geochimica. 23(1), 60–68.

[7] Zhou, S., Huang, H., Shi, X., et al., 2008. Stable isotope records and major events in environmental and life evolution. Geological Review. 54(2), 225–231.

[8] Cao, C., Wang, W., Jin, Y., 2002. Carbon isotope variations near the Permian/Triassic boundary at Meishan, Zhejiang Province. Chinese Science Bulletin. 47(4), 302–305.

[9] Xie, S., Pancost, R.D., Huang, J., et al., 2007. Changes in the global carbon cycle occurred as two episodes during the Permian-Triassic crisis. Geology. 35(12), 1083–1086.

[10] Joachimski, M.M., Lai, X., Shen, S., et al., 2012. Climate warming in the latest Permian and the Permian-Triassic mass extinction. Geology. 40(3), 195–198. DOI: https://doi.org/10.1130/G32707.1

[11] Zhang, W., 1991. New progress in isotope geological science and technology. Geological Science and Technology Information. 10(2), 67–72.

[12] Li, R., Lu, J., Zhang, S., et al., 1999. Organic carbon isotope composition of black shales from the Sinian and Early Cambrian. Science in China: Series D. 29(4), 351–357.

[13] Teng, G., Liu, W., Xu, Y., et al., 2004. Identification of effective source rocks in Ordovician marine deposits, Ordos Basin. Progress in Natural Science. 14(11), 1249–1256.

[14] Gao, Z., Fan, T., Jiao, Z., et al., 2006. Carbonate platform styles and sedimentary response characteristics of the Cambrian-Ordovician in the Tarim Basin. Acta Sedimentologica Sinica. 24(1), 19–27.

[15] Liu, D., Sun, X., Li, Z., et al., 2006. Carbon and oxygen isotope analysis of Ordovician dolomite in the Ordos Basin. Petroleum Geology & Experiment. 28(2), 155–161.

[16] Wang, K., Li, W., Lu, J., et al., 2011. Carbon, oxygen, and strontium isotope characteristics of Carboniferous carbonate rocks in eastern Sichuan and their genetic analysis. Geochimica. 40(4), 351–362.

[17] Chen, Q., Zhang, H., Li, W., et al., 2012. Carbon and oxygen isotope characteristics of Ordovician carbonate rocks in the Ordos Basin and their significance. Journal of Palaeogeography. 14(1), 117–124.

[18] Huang, S., Li, X., Hu, Z., et al., 2016. Comparison of carbon and oxygen isotope compositions of Triassic Feixianguan Formation carbonate rocks on both sides of the Kaijiang-Liangping trough in eastern Sichuan Basin and its palaeoceanographic significance. Geochimica. 45(1), 24–40.

[19] Shen, S., Cao, C., Zhang, H., et al., 2019. High-resolution δ¹³C records and phased extinction patterns at the Permian-Triassic boundary. Earth-Science Reviews. 189, 244–259.

[20] Song, X.Y., Chen, L.M., Deng, Y.F., et al., 2013. Syn-collisional tholeiitic magmatism induced by asthenosphere upwelling due to slab detachment at the southern margin of the Central Asian Orogenic Belt. Journal of the Geological Society. 170(6), 941–950. DOI: https://doi.org/10.1144/jgs2012-049

[21] Stanley, S.M., 1988. Paleozoic mass extinctions:shared patterns suggest global cooling as a common cause. American Journal of Science. 288, 334–352.

[22] Kozur, H.W., 1998. Some aspects of the Permian Triassic boundary (PTB) and of the possible causes for the biotic crisis around this boundary. Palaeogeography, Palaeoclimatology, Palaeoecology. 143, 227–272.

[23] Jin, Y., Wang, Y., Wang, W., et al., 2002. Pattern of marine mass extinction near the Permian-Triassic boundary in South China. Science. 289, 432–436.

[24] Holser, W.T., Schonlaub, H.P., Attrep, J.M., et al., 1989. A unique geochemical record at the Permian/Triassic boundary. Nature. 337, 39–44.

[25] Korte, C., Kozur, H.W., Bachmann, G.H., 2007. Carbon isotope values of Triassic lacustrine and hypersaline playa lake carbonates:lower Buntsandstein and middle Keuper(Germany). Hallesches Jahrbuch fur Geowissenschaften. 29, 1–10.

[26] Korte, C., Kozur, H.W., Mohtat Aghai, P., 2004. Dzhulfian to lowermost Triassic δ13C record at the Permian/Triassic boundary section at Shahreza, Central Iran. Hallesches Jahrbuch fur Geowissenschaften B Beiheft. 18, 73–78.

[27] Horacek, M., Brandner, R., Abaet, R., 2007. Carbon isotope of the P-T boundary and the Lower Triass in the Southern Alps: Evidence for rapid changs in storage of organic carbon. Palaeogeography,Palaeoclimatology,Palaeoecology. 252, 347–354.

[28] Zhang, X., Hu, X., Li, J., et al., 2024. Sedimentological and carbon isotope records of the carbonate platform mortality event at the end of the Early Permian in the Lower Yangtze Region. Geological Journal of China Universities. 30(04), 379–396. DOI: https://doi.org/10.16108/j.issn1006-7493.2023030

[29] Wang, J., 2015. Geochemical Characteristics and Paleoenvironmental Implications of the P/T Boundary Coals in Xuanwei, Yunnan [PhD thesis]. Beijing, China: China University of Mining and Technology. pp. 41–42.

[30] Shao, L., Dou, J., Zhang, P., 1996. The paleogeographic significance of oxygen and carbon stable isotopes in the Late Permian of southwestern China. Geochimica. 25(6), 575–581.

[31] Kaufman, A.J, KnolI, A.H., 1995. Neoproterozoic variations in the C isotope composition of seawater:stratigraphic and biogeochemieal implications. Precambrian Research. 73(1/2/3/4), 27–49.

[32] Meng, H., Ren, Y., Zhong, D., et al., 2016. Geochemical characteristics and paleoenvironmental implications of the Cambrian Longwangmiao Formation in eastern Sichuan Basin. Natural Gas Geoscience. 27(7), 1299–1311.

[33] Korte, C., Kozur, H.W., Veizer, J., 2005. δ13C and δ18O values of Triassic brachiopods and carbonate rocks as proxies for coeval seawater and palaetemperature. Palaeogeography, Palaeoecology, Palaeoclimatology. 226(3/4), 287–306.

[34] Wynn, T.C., Read, J.F., 2007. Carbon-oxygen isotope signal of Mississippian slope carbonates, Appalachians, USA: A complex response to climate-driven fourth-order glacio-eustasy. Palaeogeography, PaIaeoecoIogy, Palaeoclimatology. 256(3/4), 254–272.

[35] Wang, D., Feng, X., 2002. Geochemical study of carbon and oxygen isotopes in the Lower Paleozoic of the Bohai Bay area. Acta Geologica Sinica. 76(3), 400–408.

[36] Li, Q., Jin, Z., Jiang, F., 2014. Preliminary exploration of carbon and oxygen isotope analysis methods for dolomite genesis: A case study of the Proterozoic dolomite in the Yanshan area of Beijing. Lithologic Reservoirs. 26(4), 117–122.

[37] Keith, M.H., Weber, J.N., 1964. Isotopic composition and environmental classification of selected fossils. Geochimica et Cosmochimica Acta. 28, 1787–1816.

[38] Kong, W., Li, S., Wan, Q., et al., 2011. Carbon and oxygen isotope characteristics and their significance of the Permian in Xikou area, Zhen’an. Journal of Hefei University of Technology (Natural Science Edition). 34(7), 1058–1065.

[39] Wang, S., Gao, L., Pang, Q., et al., 2015. The terrestrial Jurassic-Cretaceous boundary in China and its international stratigraphic correlation: A case study of the Jurassic-Cretaceous chronostratigraphy in the northern Hebei-western Liaoning area. Acta Geologica Sinica. 89(8), 1331–1351.

[40] Chen, L., Zhong, H., Hu, R., et al., 2006. Early Cambrian anoxic events in northern Guizhou: Characteristics of biomarker compounds and organic carbon isotopes. Acta Petrologica Sinica. 22(9), 2413–2423.

[41] Ishikawa, T., Ueno, Y., Komiya, T., et al., 2008. Carbon isotope chemostratigraphy of a Precambrian-Cambrian boundary section in the Three Gorge area, South China: Prominent global scale isotope excursions just before the Cambrian Explosion.Gondwana Research. 14(1–2), 193–208.

[42] Yuan, Y., Cai, C., Wang, T., et al., 2014. Redox condition during Ediacaran-Cambrian transition in the Lower Yangtze deep water basin, South China: Constraints from iron speciation and δ13Corg in the Diben section, Zhejiang. Chinese Science Bulletin. 59(23), 3638–3649.

[43] Haas, J., Demeny, A., Hips, K., et al., 2006. Carbon isotope excursions and microfacies in marine Permian-Triassic boundary sections in Hungary. Paleogeogr Paleoclimatol Paleoecol. 237(2–4), 160–181.

[44] Luo, G., Huang, J., Xie, S., et al., 2010. Relationships between carbon isotope evolution and variation of microbes during the Permian-Triassic transition at Meishan Section,South China. International Journal of Earth Sciences. 99(4), 775–784.

[45] Song, H., Wignall, P.B., Tong, J., et al., 2012.Geochemical evidence from bioapatite for multiple oceanic anoxic events during Permian-Triassic transition and the link with end-Permian extinction and recovery. Earth and Planetary Science Letters. 353(1), 12–21.

[46] Nan, J., Liu, Y., 2004. Variations of organic and inorganic carbon isotopes and paleoenvironment at the Permian-Triassic boundary section in Meishan, Zhejiang. Geochimica. 33(1), 9–19. DOI: https://doi.org/10.3321/j.issn:0379-1726.2004.01.002

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How to Cite

Chenming Liu, Demin Yang, & Zhengqin Na. (2025). Characteristics and Significance of Carbon and Oxygen Isotopic Compositions of the PTB Boundary in Haidai Section, Xuanwei Area of China. Journal of Environmental & Earth Sciences, 7(5), 203–214. https://doi.org/10.30564/jees.v7i5.8500