Abstract
The formations in the early Paleozoic Joseon Supergroup (mainly carbonates with subordinate siliciclastics) within the Taebaeksan Basin in the Danyang area, South Korea, show an apparent right-side-up homoclinal stratigraphy without repetition or omission of any formation, and it was therefore thought that the NW-dipping formation boundaries are primary depositional contacts. Our detailed examination revealed, however, that the formation boundaries are reverse-slip shear zones parallel to the second-generation foliation (S2) crenulating transposed S0//S1 foliation and that WNW-dipping bedding planes (S0) are only locally preserved. The most penetrative regional planar structure in the area is the NNW-dipping first-generation foliation (S1) that is defined by compositional layering and is parallel to the axial planes of isoclinal F1 folds. Isoclinal to close F1 folds occur on both the mesoscopic and macroscopic scale, whereas tight to close F2 folds occur locally only on the mesoscopic scale. D1 deformation presumably involved a NNW-SSE horizontal contraction and resulted in the buckle folding and transposition of S0. D2 deformation involved a NW-SE contraction, probably at a high angle to the S0//S1 transposed layers, and produced passive shear folding of S0//S1 with S2 crenulation cleavages as discrete shear surfaces. Shearing deformation was strongly localized along some S2 foliation planes, resulting in reverse shear zones that represent the current ‘pseudo’-formation boundaries. Based on zircons U-Pb ages, we suggest that the Okdong Fault was initiated from an unconformable boundary between the Precambrian basement gneiss and overlying sediments of the Paleozoic Taebaeksan Basin, probably during the Middle Jurassic.
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References
Barnhoorn, A., Bystricky, M., Burlini, L., and Kunze, K., 2005, Post-deformational annealing of calcite rocks. Tectonophysics, 403, 167–191.
Bell, A.M., 1981., Vergence: an evaluation. Journal of Structural Geology, 3, 197–202.
Bestmann, M., Kunze, K., and Matthews, A., 2000, Evolution of a calcite marble shear zone complex on Thassos Island, Greece: micro-structural and textural fabrics and their kinematic significance. Journal of Structural Geology, 22, 1789–1807.
Brodie, K.H. and Rutter, E.H., 2000, Deformation mechanisms and rheology: why marble is weaker than quartzite. Journal of the Geological Society, 157, 1093–1096.
Cheong, C.H., 1971, Stratigraphy and paleontology of the Danyang Coalfield, North Chungcheong-do, Korea. Journal of Geological Society of Korea, 7, 63–88. (in Korean with English abstract)
Cho, M. and Kim, H., 2005, Metamorphic evolution of the Ogcheon belt, Korea: a review and new age constraints. International Geology Review, 47, 41–57.
Cho, M., Lee, Y., Kim, T., Cheong, W., Kim, Y., and Lee, S.R., 2017, Tectonic evolution of Precambrian basement massifs and an adjoining fold-and-thrust belt (Gyeonggi Marginal Belt), Korea: an overview. Geosciences Journal, 21, 845–865.
Choi, D.K., 1998, The Yongwol Group (Cambrian–Ordovician) redefined: a proposal for the stratigraphic nomenclature of the Choson Supergroup. Geosciences Journal, 2, 220–234.
Choi, D.K., Chough, S.K., Kwon, Y.K., Lee, S.B., Woo, J., Kang, I., Lee, H.S., Lee, S.M., Sohn, J.W., Shinn, Y.J., and Lee, D.J., 2004, Taebaek group (Cambrian-Ordovician) in the Seokgaejae section, Taebaeksan Basin: a refined lower Paleozoic stratigraphy in Korea. Geosciences Journal, 8, 125–151.
Chough, S.K., Kwon, Y.K., Lee, H.S., and Woo, J., 2022, The Jangsan Formation refined. Geosciences Journal, 26, 545–554.
Chough, S.K., Kwon, S.T., Ree, J.-H., and Choi, D.K., 2000, Tectonic and sedimentary evolution of the Korean peninsula: a review and new view. Earth-Science Reviews, 52, 175–235.
Chough, S.K., Lee, D.J., and Ree, J.-H., 2013, Whereabouts of the collision belt between the Sino-Korean and South China blocks in the northeast Asian margin. Geosciences Journal, 17, 397–401.
Cluzel, D., Cadet, J.-P., and Lapierre, H., 1990, Geodynamics of the Ogcheon belt (South Korea). Tectonophysics, 183, 41–56.
Cluzel, D., Lee, B.-J., and Cadet, J.-P., 1991, Indosinian dextral ductile fault system and synkinematic plutonism in the southwest of the Ogcheon belt (South Korea). Tectonophysics, 194, 131–151.
Davis, G.H., Reynolds, S.J., and Kluth, C.F., 2011, Structural Geology of Rocks and Regions. John Wiley & Sons, Hoboken, USA, 839 p.
Donath, F.A. and Parker, R.B., 1964, Folds and folding. Geological Society of America Bulletin, 75, 45–62.
Fossen, H., 2016, Structural Geology. Cambridge University Press, Cambridge, UK, 510 p.
Han, R., Ree, J.-H., Cho, D.-L., Kwon, S.-T., and Amstrong, R., 2006, SHRIMP U-Pb zircon ages of pyroclastic rocks in the Bansong Group, Taebaeksan Basin, South Korea and their implication for the Mesozoic tectonics. Gondwana Research, 9, 106–117.
Harms, J.C., 1979, Primary sedimentary structures. Annual Review of Earth and Planetary Sciences, 7, 227–248.
Kim, H.S. and Ree, J.-H., 2010, P-T modeling of kyanite and sillimanite paramorphs growth after andalusite in late Paleozoic Pyeongan Supergroup, South Korea: implication for metamorphism during the Mesozoic tectonic evolution. Lithos, 118, 269–286.
Kim, J.H. and Koh, H.J., 1992, Structural analysis of the Danyang area, Danyang coalfield, Korea. Economic and Environmental Geology, 25, 61–72.
Kim, J.H., Koh, H.J., and Kee, W.S., 1989, The Okdong fault. Economic and Environmental Geology, 22, 285–291.
Kim, M.J. and Park, K.-H., 2018, A review on the K-Ar ages of quartz schist in the Okdong Fault Zone: robust enough for the evidence for the Precambrian deposition of the Jangsan Formation? The Journal of the Petrological Society of Korea, 27, 67–72.
Kobayashi, T., Yosimura, I., Iwaya, Y., and Hukasawa, T., 1942, The Yokusen geosynclines in the Chosen period. Brief notes on the geological history of the Yokusen orogenic zone. Proceedings of the Imperial Academy, 18, 579–584.
Kwon, S.-T., Ree, J.-H., Park, K.-H., and Jeon, E.-Y., 1995, Nature of contact between the Ogcheon belt and Yeongnam massif and the Pb-Pb age of granitic gneiss in Cheondong-ri, Danyang. Journal of the Petrological Society of Korea, 4, 144–152. (in Korean with English abstract)
Lee, S.Y., Min, K., Ree, J.-H., Han, R., and Jung, H., 2012, The Geounri shear zone in the Paleozoic Taebaeksan Basin of Korea: tectonic implications. Journal of Structural Geology, 42, 91–103.
Ludwig, K.R., 2008, User’s manual for Isoplot/Ex 3.7 and 4.15: a geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center, Special Publication, Berkeley, USA., 4, 70 p.
Ludwig, K.R., 2009, SQUID 2: a user’s manual. Berkeley Geochronology Center, Special Publication, Berkeley, USA, 2, 104 p.
Means, W.D., 1987, A newly recognized type of slickenside striation. Journal of Structural Geology, 9, 585–590.
Passchier, C.W. and Trouw, R.A., 2005, Microtectonics (2nd edition). Springer, Berlin, Germany, 366 p.
Ramsay, J.G., 1967, Folding and Fracturing of Rocks. McGraw-Hill, New York, USA, 568 p.
Ree, J.-H., Kwon, S.H., Park, Y., Kwon, S.-T., and Park, S.H., 2001, Pretectonic and posttectonic emplacements of the granitoids in the south central Okcheon belt, South Korea: implication for the timing of strike-slip shearing and thrusting. Tectonics, 20, 850–867. https://doi.org/10.1029/2000TC001267
Schmid, S.M., Panozzo, R., and Bauer, S., 1987, Simple shear experiments on calcite rocks: rheology and microfabric. Journal of Structural Geology, 9, 747–778.
Scoffin, T.P., 1987, Introduction to Carbonate Sediments and Rocks. Chapman & Hall, New York, USA, 274 p.
Tucker, M.E., 2009, Sedimentary Petrology: An Introduction to the Origin of Sedimentary Rocks. Blackwell, Oxford, UK, 262 p.
Wernicke, B. and Axen, G.J., 1988, On the role of isostasy in the evolution of normal fault systems. Geology, 16, 848–851.
Whitney, D.L., Teyssier, C., Rey, P., and Buck, W.R., 2013, Continental and oceanic core complexes. Geological Society of America Bulletin, 125, 273–298. https://doi.org/10.1130/B30754.1
Williams, I.S., 1998, U-Th-Pb geochronology by ion microprobe. In: McKibben, M.A., Shanks III, W.C., and Ridley, W.I. (eds.), Applications of Microanalytical Techniques to Understanding Mineralizing Processes. Reviews in Economic Geology, Society of Economic Geologists, 7, p. 1–35. https://doi.org/10.5382/Rev.07.01
Williams, P.F., 1985, Multiply deformed terrains–problems of correlation. Journal of Structural Geology, 7, 269–280.
Williams, P.F. and Schoneveld, C., 1981, Garnet rotation and the development of axial plane crenulation cleavage. Tectonophysics, 78, 307–334.
Won, C.G. and Lee, H.Y., 1967, Explanatory text of the geological map of Danyang (1: 50,000). Geological Survey of Korea, Seoul, Korea, 34 p. (in Korean)
Yoshimura, I., 1940, Geology of the Neietsu District, Kogendo, Tyosen (Korea). Journal of the Geological Society of Japan, 47, 112–122. (in Japanese)
Zwingmann, H., Han, R., and Ree, J.-H., 2011, Cretaceous reactivation of the Deokpori Thrust, Taebaeksan Basin, South Korea, constrained by K-Ar dating of clayey fault gouge. Tectonics, 30, TC5015. https://doi.org/10.1029/2010TC002829
Acknowledgments
We thank two reviewers for their constructive comments. We appreciate helpful discussions in the field with Jae Hoon Kim, Xiangyi An, and Suk-Joo Choh. This work was supported by the National Research Foundation of Korea (NRF-2014R1A1A2056836) and partly by the Korea government (MSIT) (NRF-2022R1A2C 1003840).
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Uhmb, TH., Ree, JH. & Kim, H.S. Deformation-induced right-side-up pseudo-stratigraphy of the early Paleozoic Joseon Supergroup in the southeastern Danyang area, South Korea. Geosci J (2024). https://doi.org/10.1007/s12303-024-0008-2
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DOI: https://doi.org/10.1007/s12303-024-0008-2