EGU21-6880, updated on 04 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Astronomical time scale for the  Doushantuo Formation ofEdiacaran in South China: Implications for the duration of the negative δ13C excursion

Yu Sui1, Zhixiang Wang2, and Chunju Huang2
Yu Sui et al.
  • 1Hubei University of Science and Technology, The School of Resources Environment Science and Technology, Xianning 437100,China (
  • 2State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei

Reconstructing the high-resolution astrochronology framework for the Ediacaran is critical to fully understand the evolution of the sedimentary environment and the carbon cycle in South China. The Ediacaran was perhaps one of the most important intervals in the Earth's sedimentary environment and biological evolution history, which witnessed the carbon isotope perturbation frequently, the emergence and evolution of metazoans, and the extreme climate change. There are many controversies for the characteristics and origin of these geological, biological and extreme climate events due to the lack of continuous and high-resolution astronomical time scale in the Ediacaran. We here propose to study the systematic cyclostratigraphic analysis of the Doushantuo Formation based on the Jiulongwan section in South China, and then use the long-eccentricity (405-kyr) for astronomical tuning to establish continuous and high-resolution astrochronologic framework, which would provide chronological constraints on carbon isotope negative  excursions, biological evolution and the extreme climate change for the Ediacaran. In order to reveal the inner correlation of the onset age, sequence of these major geological events as well as biological evolution in the Doushantuo Formation on the Ediacaran. Moreover, we also try to discuss the astronomical orbits-forcing factor that may lead to the occurrence and evolution of these major geological events, which would provide scientific evidence for studying the global climate change in the future.

How to cite: Sui, Y., Wang, Z., and Huang, C.: Astronomical time scale for the  Doushantuo Formation ofEdiacaran in South China: Implications for the duration of the negative δ13C excursion, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-6880,, 2021.

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