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Advances in Earth Science >

2023 , Vol. 38 >Issue 8: 866 - 878

DOI: https://doi.org/10.11867/j.issn.1001-8166.2023.048

Application of 3D Digital Core Technique to the Deformation of Quaternary Soft Sediment in the Pearl River Delta

  • Yeerzhati JIAYINA ,
  • Zhen CHEN ,
  • Xianhe ZHANG ,
  • Xiaoming LIN ,
  • Weisheng WU ,
  • Xiaobo HUANG ,
  • Yapeng YAN ,
  • Yongjie TANG ,
  • Jie LIU
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  • 1.School of Earth Sciences and Engineering, Sun Yat-sen University, Guangdong Zhuhai 519082, China
    2.Xinjiang Baodi Mining Co. , Ltd. , Urumqi 830000, China
    3.GDZD Institute on Deep-Earth Sciences Co. , Ltd. , Guangzhou 510275, China
    4.Geological Survey of Guangdong Province, Guangzhou 510080, China
    5.Guangdong Foshan Geological Survey, Guangdong Foshan 528000, China
    6.Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, Guangdong Zhuhai 519082, China
    7.Southern Marine Science and Engineering Guangdong;Laboratory (Zhuhai), Guangdong Zhuhai 519082, China
JIAYINA Yeerzhati (1996-), female, Altay Prefecture, Xinjiang Uygur Autonomous Region, Master student. Research area inclueds rock micro CT technology. E-mail: jiayina@mail2.sysu.edu.cn
LIU Jie (1967-), female, Yifeng County, Jiangxi Province, Professor. Research areas include computational geodynamics and microtomography technology and applications. E-mail: liujie86@mail.sysu.edu.cn

Received date: 2023-06-09

  Revised date: 2023-07-06

  Online published: 2023-08-28

Supported by

the Specially Funded Project for Land and Resources Protection and Governance in Guangdong Province “Exploration and research on basement faults in the Pearl River Delta”(2017201);“Urban Geological Survey of Nanhai District, Foshan City” (Grant No. JF2021(NH)WZ0246)

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Abstract

The presence of Late Quaternary faults in the Pearl River Delta region is an important factor that may affect the development of the Greater Bay Area. Loose Quaternary sediments within active fault zones are the main markers and information carriers of fault activity, comprehensive observations of loose sediments from the point view of three-dimension are difficult. In this study, borehole cores from the main fault zones in Xilingang, Guangzhou were X-ray CT scanned using whole-core scanning devices, images were processed and visualized by using the volume rendering technique to investigate the 3D structures of the cores focusing on the deformation of Quaternary unconsolidated sediments. The study demonstrates that the CT scan of borehole cores enables us to virtually observe cores with reality from different perspectives by free rotations, which is impossible to reach physically for unconsolidated cores, and further reveals a large number of phenomena that cannot be observed from conventional core photographs, including the internal heterogeneous structures, the distribution of materials, and the extending pattern and compositions of fractures. Combined with the dating results of sediments, the time of fault activity can be estimated. Therefore, whole-core CT scanning can be a preferred new method for studying unconsolidated borehole cores and is recommended for geological exploration and active fault investigations in areas covered by soft sediments.

Key words： 3D digital core; Quaternary; Soft sediments; Deformation; Pearl River Delta.

Cite this article

Yeerzhati JIAYINA , Zhen CHEN , Xianhe ZHANG , Xiaoming LIN , Weisheng WU , Xiaobo HUANG , Yapeng YAN , Yongjie TANG , Jie LIU . Application of 3D Digital Core Technique to the Deformation of Quaternary Soft Sediment in the Pearl River Delta[J]. Advances in Earth Science, 2023 , 38(8) : 866 -878 . DOI: 10.11867/j.issn.1001-8166.2023.048

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