DOI QR코드

DOI QR Code

백악기 후기 미시령 병반의 기하학적 복원과 백담분지의 규모에 관한 소고

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

  • 최위찬 (한국지질자원연구원 국토지질연구본부) ;
  • 김유봉 (한국지질자원연구원 국토지질연구본부) ;
  • ;
  • 최성자 (한국지질자원연구원 국토지질연구본부)
  • 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)
  • 투고 : 2011.06.21
  • 심사 : 2011.08.10
  • 발행 : 2011.08.28

초록

창암점 도폭 (1:5만)을 조사하는 과정에서 속초시 서쪽의 미시령 인근에서 반심성암으로 구성된 미시령 병반의 존재를 알게 되었으며, 원래의 병반 모양을 알기 위해 석영장석반암 직 상위에 산점상으로 분포하는 퇴적층에 대한 구조등고선과 단면도를 통한 기하학적 복원을 하였다. 병반의 형성시기는 상기 반암의 관입시기인 $84.4{\pm}1.8$ Ma (SHRIMP)로 고려된다. 삭박되어 잃어버린 백담퇴적분지의 원래 크기는 동-서 폭이 6 km, 남-북 길이가 16 km에 달하는 것으로 산출되었다.

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.

키워드

참고문헌

  1. Cho, D.-L., Hong, S.H., Chwae, U., Lee, B.-J. and Choi, P.-Y. (1998) Geological Report of the Goseong-Ganseong Sheet (1:50,000). KIGAM, 59p.
  2. Chwae, U., Kim, K.B., Hong, S.H., Lee, B.J., Hwang, J.H., Park, K.H., Hwang, S.K., Choi, P.Y., Song, K.Y. and Jin, M.S. (1995) Geological Map of Korea (1,:000,000). KIGAM.
  3. Fichter, L.S. (2000) "Igneous Phase Diagrams". Igneous Rocks. James Madison University. http://csmres.jmu.edu/geollab/Fichter/IgnRx/Phasdgrm.html. Retrieved 2006-04-29.
  4. Kee, W.-S., Kim, H., Kim, B.C., Choi, S.-J., Park, S.-I. and Hwang, S.K. (2010) Geological Report of the Seoraksan Sheet(1:50,000). KIGAM, 94p.
  5. Kim, Y.B., Chwae, U. and Hwang. S.K. (2010) Geological Report of the Changamjeom Sheet (1:50,000). KIGAM, 80p.
  6. Reedman, A.J., Park, K.H., Merriman, R.J. and Kim, S.E. (1987) Welded tuff infilling a volcanic vent at Weolseong, Republic of Korea. Bull. Volcanol., v.49, p.541-546. https://doi.org/10.1007/BF01080448
  7. Sichel, S.E., Motoki, A., Savi, D.C. and Soares, R. (2008) REM: R. Esc. Minas, Ouro Preto., v.61, p.423-432, out. dez. 2008. https://doi.org/10.1590/S0370-44672008000400004