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To ascertain the origin of the Yangju-Circular-Structure (YCS), located north of Seoul, South Korea, extensive gravity surveys were conducted. A collaborative analysis, integrating geology, geomorphology, gravity field interpretation, and density modeling, yielded significant insights: (1) The eastern region of the YCS, adjacent to the Dongducheon fault line, has been displaced approximately 3,000 m southward. This substantial shift provides crucial evidence of significant tectonic activity affecting the area. (2) Our analyses indicate that the formation of the YCS is unlikely to be a result of differential weathering processes. (3) The YCS features three distinct concentric circular structures with varying in diameter. (4) The subsurface structure beneath the YCS appears to be symmetrical, likely resulting from concentric energy waves caused by an external impact, such as a meteorite.

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Meteorite Impact Origin of Yangju Circular Structure in the Middle Part of the Korean Peninsula Estimated by Gravity Field Interpretation

  • 会议论文

  • 出版模式：

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  • 发表日期：

    2024年

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  • Sungchan Choi,
  • Sung-Wook Kim,
  • Younghong Shin,
  • Eun-Kyeong Choi

摘要

To ascertain the origin of the Yangju-Circular-Structure (YCS), located north of Seoul, South Korea, extensive gravity surveys were conducted. A collaborative analysis, integrating geology, geomorphology, gravity field interpretation, and density modeling, yielded significant insights: (1) The eastern region of the YCS, adjacent to the Dongducheon fault line, has been displaced approximately 3,000 m southward. This substantial shift provides crucial evidence of significant tectonic activity affecting the area. (2) Our analyses indicate that the formation of the YCS is unlikely to be a result of differential weathering processes. (3) The YCS features three distinct concentric circular structures with varying in diameter. (4) The subsurface structure beneath the YCS appears to be symmetrical, likely resulting from concentric energy waves caused by an external impact, such as a meteorite.