Browse > Article

Fault system in the Cretaceous Kyokpo Basin and its basement: Implications for basin formation  

Lee, Byung-Joo (Geologic Environment Div., Korea Institute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Journal of the Geological Society of Korea / v.47, no.3, 2011 , pp. 245-254 More about this Journal
Abstract
In the study area which is the Cretaceous sedimentary Kyokpo Basin and the basement, three types of faults are recognized: dextral strike-slip faults , normal faults and reverse faults. The strike-slip faults can be subdivided into three sets (Banwol Fault, Jongam Fault and Gunghangchi Fault). Among the strike-slip faults, the Banwol fault, which is running along the northern coastline, has conjugate sinistral strike-slip faults of NW direction. The normal faults of nearly WEW direction well develop at the northeastern coastline and the reverse faults of NS direction are distributed in the western coastline. These different sets of the faults can be simultaneously formed by the compression of about $110^{\circ}$ direction. The compression also resulted in the formation of thrusts and slumped beds or asymmetrical folds, which have well-developed NNE-NS strike of the axial plane. The thrusts and folds only occur within any particular horizons overlain by undeformed strata, indicative of syn-depositional origin. The dextral sense of strike-slip faults, the systematic development of fault systems, and the syn-depositional deformation of sediments collectively suggested that the Kyokpo Basin was formed under a dextral strike-slip regime, about $110^{\circ}$ compressional direction. Conclusively the Kyokpo basin is interpreted as a fault wedge basin (transpressional basin) rather than a pull-apart basin (transtensional basin).
Keywords
Cretaceous sedimentary basin; Kyokpori Formation; Kyokpo Basin; strike-slip fault; wedge basin;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 기원서, 김복철, 이융남, 2006, 백악기 남양분지의 퇴적환경과 구조적 진화. 지질학회지, 42, 329-351.
2 김정환, 이제용, 기원서, 1994, 백악기 부여분지의 구조적 진화. 지질학회지, 30, 182-192.
3 이병주, 김복철, 2003, 백악기 공주분지의 지질 및 지질구조 특성 연구. 지질학회지, 39, 161-170.
4 이희권, 1998, 백악기 풍암분지에 대한 구조지질학적 연구. 지질학회지, 34. 122-136.
5 최영섭, 1996, 음성분지의 지구조운동 연구. 서울대학교 박사학위논문, 158 p.
6 Bartlett, W.L., Friedman, M. and Logan, J.M., 1981, Experimental folding and faulting of rocks under confining pressure. Part IX, Wrench faults in limestone layers, Tectonophysics, 79, 255-277.
7 Chun, S.S., 1990, Sedimentary processes, depositional environments and tectonic settings of the Cretaceous Uhangri Formation, southwest Korea. Unpubl. Ph.D. Thesis, Seoul National University, 328 p.
8 Chun, S.S. and Lee, H.J., 1991, Basin analysis of the Cretaceous sedimentary basins: depositional environments and depositional mechanisms of the Kyokpo Basin. KORDI, BSPE 00233-348-5, 131 p.
9 Chun, S.S. and Chough, S.K., 1992, Tectonic history of Cretaceous sedimentary basins in the southwestern Korean Peninsula and Yellow Sea. In: S.K. Chough (Ed.), Sedimentary Basins in the Korean Peninsula and Adjacent Seas. Spec. Publ. Korean Sedimentology Research Group, Special Publication 1, 60-76.
10 Chun, S.S. and Kim, S.B., 1995, The Cretaceous Kyokpori Formation, SW Korea: sublacustrine steep-sloped delta facies. Journal of Geological Society of Korea, 31, 215-236.
11 Crowell, J.C., 1974, Origin of late Cenozoic basins in southern California. In: Tectonics and Sedimentation (Ed. by W.R. Dickinson), Special Publ., Soc. Econ. Paleont. Miner. Tulsa, 22, 190-204.
12 Gibbs, A.D., 1984, Structural evolution of extensional basin margins. Jl of the Geological Society of London, 141, 609-620.   DOI   ScienceOn
13 KIER, 1981, Report on stability of proposed site for a nuclear power plant (Buan Site). 105 p.
14 Kim, B.C., Yu, K.M., Chun, H.Y., Choi, S.J. and Kim, Y.B., 1997, The southeastern margin of the Cretaceous Yongdong Basin, Korea: a lacustrine fan-delta system. Geosciences Journal, 1, 61-74.   DOI
15 Kim, S.B., Chough, S.K. and Chun, S.S., 1995, Bouldery deposits in the lowermost part of the Cretaceous Kyokpori Formation, SW Korea; Cohesionless debris flows and debris falls on a steep-gradient delta slope. Sedimentary Geology, 98, 97-119.   DOI   ScienceOn
16 Wilcox, R.E., Harding, T.P. and Seely, D.R., 1973, Basic wrench tectonics: the American Association of Petroleum. Geologist Bull., 57, 199-201.
17 Lambiase, J.J. and Bosworth, W.P., 1995, Structural development and stratigraphy of the Kyokpo Pull-Apart Basin, South Korea and tectonic implications for inverted extensional basin. Geo., Soc. Special Pub., 88, 457-417.
18 Moody, J.D. and Hill, M.J., 1956, Wrench fault tectonics. Geol. Soc. Am. Bull., 67, 1207-1246.   DOI
19 Sales, J.K., 1968, Crustal mechanics of Cordillerian foreland deformation: A regional and scale-model approach. the American Association of Petroleum Geologist Bull., 52, 2016-2044.