The Korean Journal of Quaternary Research (한국제4기학회지)

Korea Association For Quaternary Research (한국제4기학회)
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Holocene uplift rates in Korea

한반도의 현세 융기율

  • Wook-Hyun Nahm (Geology Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Hoil Lee (Geology Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Chang-Pyo Jun (Geology Division, Korea Institute of Geoscience and Mineral Resources)
  • 남욱현 (한국지질자원연구원 국토지질연구본부) ;
  • 이호일 (한국지질자원연구원 국토지질연구본부) ;
  • 전창표 (한국지질자원연구원 국토지질연구본부)
  • Received : 2018.11.20
  • Accepted : 2018.12.27
  • Published : 2018.12.31
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Abstract

The most common method for estimating the uplifting rate is to measure the height of the coastal terraces. Coastal terraces are basically formed at the sea level position. During the Holocene age, both the height of the sea level and the coastal terrace are uncertain. The purpose of this paper is to clarify that the uplifting rate of the Korean Peninsula varies depending on the region, based on the height of sea level, the height of coastal terraces, and GPS observations. Gangwon-do and Jeolla-do provinces seem to have been stabilized at least since the beginning of the Holocene period. Overall distribution pattern of the uplifting rates on the Korean peninsula is likely to be related to the massifs. Of course, the boundaries of the massifs are faults, so the role of faults would be great. Essentially however, it is reasonable to consider that the difference in local uplift rates depends on the characteristics of the massif itself. The characteristics may include differences in response to stresses from tectonic movements, differences in crustal thicknesses, and so on.

지질-지형의 안정성을 논할 때에 가장 기본이 되는 것은 융기율이며, 융기율 산정을 위해서 가장 널리 쓰이는 방법은 해안단구의 높이를 측정하는 것이다. 해안단구는 기본적으로 해수면 높이에서 형성되는데, 현세 동안에는 해수면 높이와 해안단구의 높이 모두 불확실하다. 본 논문에서는 현세 동안의 해수면 높이, 해안단구 높이, 그리고 GPS 상시관측 결과 등을 토대로 한반도의 융기율이 지역에 따라 차이가 있음을 밝히고자 하였다. 강원도와 전라도 해안은 최소한 현세 초기 이후 대체로 안정한 것으로 보이며, 경상도 일대는 현세 중기 이후에 상당량 융기한 것으로 판단할 수 있다. 한반도에서 지역적으로 융기율의 차이가 나타나는 양상은 육괴의 분포와 연관되어 있을 가능성이 높다. 물론 이러한 육괴의 경계는 단층이므로 단층의 역할이 크겠지만, 기본적으로 지역적 융기율의 차이는 육괴 자체의 특성에 따르는 것으로 보는 것이 타당할 것이다. 그 특성은 지구조 규모의 응력에 반응하는 정도 차이, 지각 두께의 차이 등을 포함할 수 있다.

Keywords

Acknowledgement

본 연구는 한국지질자원연구원에서 수행하고 있는 연구 과제 "HLW지층처분 후보부지 선정을 위한 전국 규모 지질환경정보도 작성(GP2018-009)"의 일환으로 수행하였습니다.

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