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An Exploratory Study on the Geometrical Reconstruction of the Late Cretaceous Misiryeong Laccolith and the Lost Size of the Baekdam Basin

백악기 후기 미시령 병반의 기하학적 복원과 백담분지의 규모에 관한 소고

  • Chwae, Uee-Chan (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, You-Bong (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Suzuki, Kazuhiro (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Choi, Sung-Ja (Geological Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 최위찬 (한국지질자원연구원 국토지질연구본부) ;
  • 김유봉 (한국지질자원연구원 국토지질연구본부) ;
  • ;
  • 최성자 (한국지질자원연구원 국토지질연구본부)
  • Received : 2011.06.21
  • Accepted : 2011.08.10
  • Published : 2011.08.28

Abstract

As a product of geological mapping of the Changamjeom Sheet (1:50,000) located around Misiryeong at a distance towards the west from Sokcho city, a small laccolith of hypabyssal rocks has been geometrically reconstructed to understand the original laccolith shape using structural contour lines of random spot sediments laid on the quartz feldspar porphyry and a schematic cross section. The laccolith age is constrained to ca. $84.4{\pm}1.8$ Ma (SHRIMP). The originated Baekdam sedimentary basin with the lost size has been yielded to 6 km wide and 16 km long.

Keywords

geometrical reconstruction;Misiryeong laccolith;quartz feldspar porphyry;comagmatic intrusive activity;Baekdam basin

Acknowledgement

Grant : 지질 도폭조사 연구

Supported by : 지식경제부

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