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The Abuduo Fault on the Eastern Margin of the Tibetan Plateau: Geometric Structure Interpretation and Slip Rate Estimation.

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Title: The Abuduo Fault on the Eastern Margin of the Tibetan Plateau: Geometric Structure Interpretation and Slip Rate Estimation.
Authors: Liao, Cheng1,2 (AUTHOR), Liang, Mingjian1,2 (AUTHOR) liangmingjian@scdzj.gov.cn, Wu, Weiwei1,2,3 (AUTHOR), Chen, Cong1,2 (AUTHOR), Zuo, Hong1,2 (AUTHOR), He, Fuxiu1,2,3 (AUTHOR), Chen, Ailin1,2 (AUTHOR), Dong, Yunxi1 (AUTHOR), Liu, Shuhuai3 (AUTHOR)
Source: Remote Sensing. Jun2026, Vol. 18 Issue 12, p1916. 24p.
Subjects: Geologic faults, Strike-slip faults (Geology), Radiocarbon dating, Surface geometry, Velocity, Remote sensing, Uplands, Earthquake hazard analysis
Geographic Terms: China, Tibet (China)
Abstract: Highlights: What are the main findings? Based on GF-7 and other remote sensing data combined with field seismo-geological investigations, the fine geometric structure of the Abuduo Fault was obtained for the first time, and the fault was divided into three segments according to geometric discontinuities. Meanwhile, remote sensing interpretation and field validation of tectonic landforms along the fault were conducted, yielding 25 sets of left-lateral offset parameters and revealing the displacement distribution characteristics. 14C dating and offset extraction were performed on a typical offset gully, yielding a slip rate of 2.5–2.8 mm/yr for the western segment of the Abuduo Fault. What are the implications of the main findings? This study enriches the fundamental research data of the Abuduo Fault and provides important supporting material for regional seismic hazard assessment and the compilation of the fifth-generation seismic ground motion parameter map of China. These findings are of great significance for exploring the slip rate partitioning characteristics of the Garzê–Yushu Fault and the dynamic evolution of the eastern margin of the Tibetan Plateau. The Abuduo Fault is a Holocene left-lateral strike-slip fault located on the eastern margin of the Tibetan Plateau, potentially connecting eastward with the Garzê–Yushu Fault. Due to its high-altitude setting, this fault remains poorly studied, and knowledge of its detailed surface geometry and slip rate is still insufficient. Using GF-7 and other multi-source remote sensing data, field surveys, semi-automatic offset extraction software, and radiocarbon (14C) dating, we determined the fault's fine surface geometry, offsets, and slip rate. The results show that the fault can be divided into western, central, and eastern segments based on geometric discontinuities. The central segment consists of four right-stepping en echelon faults. The western and central segments are separated by a left-stepping compressional ridge with a step-over width of ~3.1 km, while the central and eastern segments are separated by a right-stepping pull-apart basin with a step-over width of ~9.4 km. Offsets generally increase from west to east. The western and central segments may exhibit stronger Late Quaternary activity, but this understanding remains to be further validated. Based on offset measurement and the dating of a typical offset gully, the Holocene slip rate of the western segment is estimated at 2.5–2.8 mm/yr. [ABSTRACT FROM AUTHOR]
Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: The Abuduo Fault on the Eastern Margin of the Tibetan Plateau: Geometric Structure Interpretation and Slip Rate Estimation.
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  Data: <searchLink fieldCode="JN" term="%22Remote+Sensing%22">Remote Sensing</searchLink>. Jun2026, Vol. 18 Issue 12, p1916. 24p.
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  Data: <searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br /><searchLink fieldCode="DE" term="%22Strike-slip+faults+%28Geology%29%22">Strike-slip faults (Geology)</searchLink><br /><searchLink fieldCode="DE" term="%22Radiocarbon+dating%22">Radiocarbon dating</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+geometry%22">Surface geometry</searchLink><br /><searchLink fieldCode="DE" term="%22Velocity%22">Velocity</searchLink><br /><searchLink fieldCode="DE" term="%22Remote+sensing%22">Remote sensing</searchLink><br /><searchLink fieldCode="DE" term="%22Uplands%22">Uplands</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink><br /><searchLink fieldCode="DE" term="%22Tibet+%28China%29%22">Tibet (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Highlights: What are the main findings? Based on GF-7 and other remote sensing data combined with field seismo-geological investigations, the fine geometric structure of the Abuduo Fault was obtained for the first time, and the fault was divided into three segments according to geometric discontinuities. Meanwhile, remote sensing interpretation and field validation of tectonic landforms along the fault were conducted, yielding 25 sets of left-lateral offset parameters and revealing the displacement distribution characteristics. 14C dating and offset extraction were performed on a typical offset gully, yielding a slip rate of 2.5–2.8 mm/yr for the western segment of the Abuduo Fault. What are the implications of the main findings? This study enriches the fundamental research data of the Abuduo Fault and provides important supporting material for regional seismic hazard assessment and the compilation of the fifth-generation seismic ground motion parameter map of China. These findings are of great significance for exploring the slip rate partitioning characteristics of the Garzê–Yushu Fault and the dynamic evolution of the eastern margin of the Tibetan Plateau. The Abuduo Fault is a Holocene left-lateral strike-slip fault located on the eastern margin of the Tibetan Plateau, potentially connecting eastward with the Garzê–Yushu Fault. Due to its high-altitude setting, this fault remains poorly studied, and knowledge of its detailed surface geometry and slip rate is still insufficient. Using GF-7 and other multi-source remote sensing data, field surveys, semi-automatic offset extraction software, and radiocarbon (14C) dating, we determined the fault's fine surface geometry, offsets, and slip rate. The results show that the fault can be divided into western, central, and eastern segments based on geometric discontinuities. The central segment consists of four right-stepping en echelon faults. The western and central segments are separated by a left-stepping compressional ridge with a step-over width of ~3.1 km, while the central and eastern segments are separated by a right-stepping pull-apart basin with a step-over width of ~9.4 km. Offsets generally increase from west to east. The western and central segments may exhibit stronger Late Quaternary activity, but this understanding remains to be further validated. Based on offset measurement and the dating of a typical offset gully, the Holocene slip rate of the western segment is estimated at 2.5–2.8 mm/yr. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Identifiers:
      – Type: doi
        Value: 10.3390/rs18121916
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 24
        StartPage: 1916
    Subjects:
      – SubjectFull: Geologic faults
        Type: general
      – SubjectFull: Strike-slip faults (Geology)
        Type: general
      – SubjectFull: Radiocarbon dating
        Type: general
      – SubjectFull: Surface geometry
        Type: general
      – SubjectFull: Velocity
        Type: general
      – SubjectFull: Remote sensing
        Type: general
      – SubjectFull: Uplands
        Type: general
      – SubjectFull: Earthquake hazard analysis
        Type: general
      – SubjectFull: China
        Type: general
      – SubjectFull: Tibet (China)
        Type: general
    Titles:
      – TitleFull: The Abuduo Fault on the Eastern Margin of the Tibetan Plateau: Geometric Structure Interpretation and Slip Rate Estimation.
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              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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