Abstract
This study proposes the revised stratigraphy of the lower part of the Duwibong Unit of the lower Paleozoic Joseon Supergroup that the Myobong Formation is the lowermost stratum. The Jangsan Formation, which has long been regarded as the lowermost stratum of the Unit, is likely to be of late Proterozoic in age. It is also proposed that the Myeonsan and Myobong formations are of coeval age and that the Myeonsan Formation formed in the early stage is interpreted to be the local proximal facies which was overlain by the Myobong Formation in the late stage. This new interpretation is based on the presence of the unconformity between the Jangsan and Myobong formations observed in two areas (Dongjeom area, Taebaek City and Deogam area, Imgye-Myeon, Jeongseon-Gun). Sandstone facies in the topmost part of the Myeonsan Formation is gradually overlain by siltstone to mudstone facies of the Myobong Formation. In addition, Myobong mudstone is geochemically similar to Myeonsan mudstone. The similarity in lithologies among Jangsan sandstone, quartzarenite gravelly clasts in the Myeonsan Formation and the newly defined late Proterozoic stratum (Kim and Lee, 2003a), immediately underlying the Myeonsan Formation provides additional evidence that the Jangsan Formation is not the lowermost stratum of the Duwibong Unit but the source rocks of quartzarenite gravelly clasts of the Myeonsan Formation.
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References
Cheong, C.H., 1969, Stratigraphy and paleontology of the Samcheog coalfield, Gangweondo, Korea. Journal of Geological Society of Korea, 5, 13–56.
GICTR, 1962, Geologic Atlas of Taebaegsan Region. Geological Investigation Corps of Taebaegsan Region.
Haapala, I. and Rämö, O.T., 1990, Petrogenesis of the Proterozoic rapakivi granites of Finland. Geological Society of America Special Paper 246, 275–286.
Haapala, I. and Rämö, O.T., 1999, Rapakivi granites and related rocks: an introduction. Precambrian Research, 95, 1–7.
Hallam, A., 1984, Pre-Quaternary sea level changes. Annual Review of Earth and Planetary Scineces, 12, 205–243.
Jarvis, K.E., 1988, Inductively coupled plasma mass spectrometry: a new technique for the rapid or ultra-trace level determination of the rare-earth elements in geological materials. Chemical Geology, 68, 31–39.
Kim, H.S., 1977, Mineralogy and petrology of the Precambrian iron deposits. Journal of Geological Society of Korea, 13, 191–211.
Kim, J.Y., 1991, Stratigraphy of the Myeonsan Formation in Samcheoggun, Kangwondo and Ponghwagun, Kyeongsangbukdo. Journal of the Geological Society of Korea, 27, 225–245.
Kim, J.Y. and Cheong, C.H., 1987, The Precambrian-Cambrian boundary in the east of the Dongjeom fault, Gangweon-do, Korea. Journal of the Geological Society of Korea, 23, 145–158.
Kim, Y., 2004, Sedimentary evolution of siliciclastic rocks in the Duwibong unit of the lower Paleozoic Joseon Supergroup, Korea. Ph. D. Thesis, Seoul National University, 322p.
Kim, Y. and Lee, Y.I., 2003a, A new Late Proterozoic stratum in South Korea. Geosciences Journal, 7, 47–52.
Kim, Y. and Lee, Y.I., 2003b, Characterization of quartzites in the southern Korean Peninsula. Gondwana Research, 6, 729–742.
Kim, Y. and Lee, Y.I., 2004a, Diagenesis of shallow marine sandstones, the Lower Ordovician Dongjeom Formation, Korea: Response to relative sea-level changes. Journal of Asian Earth Sciences, 23, 235–245.
Kim, Y. and Lee, Y.I., 2004b, Origin of quartz cement in the Lower Ordovician Dongjeom Formation, Korea. Journal of Asian Earth Sciences, 24, 327–335.
Kobayashi, T., 1966, The Cambro-Ordovician formations and faunas of South Korea. Part X. stratigraphy of Chosen Group in Korea and south Machuria and its relation to the Cambro-Ordovician formation of other areas. Sect. A. The Chosen Group of South Korea, Jornal of Science, University of Tokyo, 16, 1–84.
Kobayashi, T., Yosimura, I., Iwaya, Y. and Hukasawa, T., 1942, The Yukusen Geosyncline in the Chosen Period. Brief notes on the geologic history of the Yukosen Orogenic Zone, 1. Proc. Imp. Acad. Tokyo 18, 579–584.
Lee, H.Y., 1988, Paleozoic Eratherm. In: Lee, D.S. (Ed.), Geology of Korea. Kyohak-sa, Seoul, pp. 49–156.
Lee, S.M. and Kim, H.S., 1968, Petrogenesis of the syenite in the Yangyang mine district, Kwangwon Province. Journal of Geological Society of Korea, 4, 199–214.
Lee, Y.I. and Lee, J.I., 2003, Paleozoic sedimentation and tectonics in Korea: A review. Island Are, 12, 162–179.
Park, B.K., Ryu, C.S. and Cheong, D.K., 1994, Sedimentary facies and depositional settings of Lower Cambrian Myobong Formation in Choseon Supergroup, Taebaeg area, Korea. Journal of Geological Society of Korea, 30, 435–454.
Ri, S.R. and Om, H.Y., 1996, Section 3: Middle-Upper Proterozoic Era. In: Paek, R.J., Kang, H.G. and Jon, G.P. (Eds.), Geology of Korea. Foreign Languages Books Publishing House, Pyongyang, pp. 52–79.
Taylor, S.R. and McLennan, S.M., 1985, The Continental Crust: Its Composition and Evolution. Blackwell, 312 p.
Vail, P.R., Mitchum, R.M., Jr. and Thompson, S., III, 1977, Seismic stratigraphy and global changes of sea level, 4: Global cycles of relative changes of sea level. In: Payton, C.E. (Ed.) Seismic Stratigraphy—Applications to Hydrocarbon Exploration. American Association of Petroleum Geologists Memoir 26, pp. 83–97.
Windley, B.F., 1995. The Evolving Continent 3rd Edition. John Wiley and Sons, Chichester, 526p.
Yun, S., 1978, Petrology, chemical composition, and depositional environments of the Cambro-Ordovician sedimentary sequences in the Yeonhwa 1 mine area, southeastern Taebaegsan region, Korea. Journal of the Geological Society of Korea, 14, 145–174.
Zhai, M., Ni, Z., Oh, C.W., Guo, J. and Choi, S.G., 2005, SHRIMP zircon age of a Proterozoic rapakivi granite batholith in the Gyeonggi massif (South Korea) and its geological implications. Geological Magazine, 142, 23–30.
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Kim, Y., Lee, Y.I. Early evolution of the Duwibong Unit of the lower Paleozoic Joseon Supergroup, Korea: A new view. Geosci J 10, 391–402 (2006). https://doi.org/10.1007/BF02910434
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DOI: https://doi.org/10.1007/BF02910434