Earth Science Frontiers ›› 2024, Vol. 31 ›› Issue (1): 412-430.DOI: 10.13745/j.esf.sf.2024.1.4

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International Continental Scientific Drilling Project of the Songliao Basin: Terrestrial Geological Records of the Cretaceous Dinosaur Age

WANG Chengshan1,2(), GAO Yuan1,2, WANG Pujun3, WU Huaichun1,4, LÜ Qingtian5, ZHU Yongyi6, WAN Xiaoqiao1,2, ZOU Changchun7, HUANG Yongjian1,2, GAO Youfeng3, XI Dangpeng1,2, WANG Wenshi6, HE Huaiyu8, FENG Zihui9, YANG Guang10, DENG Chenglong8, ZHANG Laiming1,2, WANG Tiantian1,11, HU Bin1,2, CUI Liwei12, PENG Cheng7, YU Enxiao13, HUANG He14, YANG Liu2, WU Zhengxuan2   

  1. 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China
    2. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
    3. College of Earth Sciences, Jilin University, Changchun 130061, China
    4. School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    5. Chinese Academy of Geological Sciences, Beijing 100037, China
    6. Institute of Exploration Techniques, Chinese Academy of Geological Sciences, Langfang 065000, China
    7. School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China
    8. Stale Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    9. Exploration and Development Research Institute, Daqing Oilfield Limited Corporation Ltd., PetroChina, Daqing 163712, China
    10. Exploration Department, Jilin Oilfield Company, PetroChina, Songyuan 138000, China
    11. Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China
    12. China Geological Survey, Geological Information Center, Ministry of Land and Resources, Langfang 101149, China
    13. Hainan Wildfire Technology Co., Ltd., Haikou 570100, China
    14. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
  • Received:2023-12-10 Revised:2023-12-29 Online:2024-01-25 Published:2024-01-25

Abstract:

Over the past century the Earth has experienced continued warming, and it may enter a Greenhouse Earth state in the future with no ice at the poles. The Cretaceous was a typical Greenhouse period in deep time; thus, understanding the Cretaceous climate is important for interpreting past climate changes and predicting future trends. The ICDP (International Continental Drilling Program) Songliao Basin drilling project is the world's first continental scientific drilling project to penetrate the Cretaceous continental strata; it is aimed to investigate Cretaceous terrestrial climate and environmental changes, and to explore the mechanisms of massive terrestrial organic accumulation and enrichment. Spanning 16 years, this project achieves a continuous, complete 8187-meter core (recovery rate >97%, establishes a high-precision chronostratigraphic framework for the Cretaceous continental strata, reconstructs multi-temporal-scale terrestrial climate cycles and climate events during the Cretaceous period, reveals the mechanisms of Cretaceous sea-level fluctuations, and confirms marine incursion events in the Songliao Basin. This project has promoted global collaboration among geologists to study the Cretaceous greenhouse Earth, leading to a series of high-impact research achievements, and it has provided crucial scientific support for the sustainable development of oil and gas exploration in the Songliao Basin, generating significant social benefits and substantial international and domestic influence. This project represents a milestone in exploring deep-time Earth, and it is foreseeable that in the future, with the aid of scientific drilling, humans will continue to enhance their understanding of deep-time climatic and environmental evolution.

Key words: International Continental Scientific Drilling Program (ICDP), Songliao Basin, Cretaceous, paleoclimate, chronostratigraphic framework, marine incursion events

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