Paleoenvironmental significance of ichnogenus Skolithos in the aftermath of the end-Permian mass extinction: a case study of the Lower Triassic Heshanggou Formation in western Henan Province
Xing Zhi-Feng1,2,3, Li Wan-Ying1, Qi Yong-An1,2,3, Zheng Wei1,2,3, Xu Xin1, Zhang Xiang-Yun1, Li Da1,2,3, Wu Pan-Pan1
1 College of Resources and Environment,Henan Polytechnic University,Henan Jiaozuo 454003,China; 2 Henan Province Key Laboratory of Biogenic Traces and Sedimentary Minerals,Henan Jiaozuo 454003,China; 3 Central Plains Economic Zone Coalbed Methane and Shale Gas Collaborative Innovation Center,Henan Jiaozuo 454003,China
Abstract The Lower Triassic ichnofossils in the western Henan record the evolution of trace-maker communities from remnant to recovery after the Permian-Triassic mass extinction(PTME). Skolithos is characterized by vertical or high angle inclination to the rock layer,and is widely preserved in the Lower Triassic Heshanggou Formation. Macroscopic and microscopic characteristics of Skolithos were studied on abundant,well-developed Skolithos specimens collected from the Heshanggou Formation in Dengfeng and Yiyang areas.We conducted a three dimensional occupation cubes of ecospace utilization and ecosystem engineering by analyzing the motility,feeding strategy,the interaction between organisms and substrate, and the way of biological modification of sediments. We also analyzed the paleoenvironmental significance of Skolithos and explored the high environmental pressure indicated by Skolithos ichnofossils. The results show that Skolithos is mainly affected by high environmental pressures such as high temperatures,dry and hot climate and giant monsoon in the early stage of recovery. As an opportunistic ichnogenus, Skolithos was widely developed in meandering river and shallow lacustrine deposits. The above results may provide a reference for the study of continental sedimentary environment and paleoecological background of the Lower Triassic in the western Henan.
Fund:Co-funded by the National Natural Science Foundation of China(Nos. 41772110,41872111,41102008,41902113),Key Research Project of Higher Education Institutions in Henan Province(No. 20A170010) and Key Scientific and Technological Projects in Henan Province(No. 202102310336)
Corresponding Authors:
Zheng Wei,born in 1979,is an associate professor in the college of resources and environment of Henan Polytechnic University. He is mainly engaged in researches of sedimentology,ichnology. E-mail: zhengw99@hpu.edu.cn.
About author: Xing Zhi-Feng,born in 1973,is an associate professor in the college of resources and environment of Henan Polytechnic University. She is mainly engaged in researches of sedimentology,paleontology and ichnology. E-mail: xingzhifeng925@hpu.edu.cn.
Cite this article:
Xing Zhi-Feng,Li Wan-Ying,Qi Yong-An et al. Paleoenvironmental significance of ichnogenus Skolithos in the aftermath of the end-Permian mass extinction: a case study of the Lower Triassic Heshanggou Formation in western Henan Province[J]. JOPC, 2022, 24(3): 461-478.
Xing Zhi-Feng,Li Wan-Ying,Qi Yong-An et al. Paleoenvironmental significance of ichnogenus Skolithos in the aftermath of the end-Permian mass extinction: a case study of the Lower Triassic Heshanggou Formation in western Henan Province[J]. JOPC, 2022, 24(3): 461-478.
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