Comparison of the Ordovician-Carboniferous Boundary Between Korea and NE China: Implications for Correlation and Tectonic Evolution |
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| Authors: | Jeong Hwan Kim Yong Il Lee Maosong Li Zhiquiang Bai |
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| Institution: | 1. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, China;2. Centre for Tectonics, Resources and Exploration, Department of Earth Sciences, University of Adelaide, SA 5005, Australia;3. School of Earth Sciences and Resources, China University of Geosciences Beijing, No. 29, Xueyuan Road, Haidian District, Beijing 100083, China;1. Department of Earth Sciences, Memorial University of Newfoundland, St. John''s, NL A1B 3X5, Canada;2. Geological Museum, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark;3. Department of Earth Sciences, Brock University, St. Catharines, Ontario L2S 3A1, Canada;4. Dipartimento di Scienze della Terra, Universita` di Pisa, via Santa Maria 53, 56126 Pisa, Italy;5. 1417 Fairbrook Dr., Des Peres, MO 63131, USA;1. Department of Earth and Environmental Sciences, Korea University, Seoul 136-713, Republic of Korea;2. Department of Earth and Environmental Sciences, Andong National University, Andong 760-749, Republic of Korea |
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| Abstract: | There is a great hiatus between Ordovician and Carboniferous strata in the Northeast China and Korean Peninsula. In order to understand geology and tectonic evolution, and to find out the similarities and differences in both regions, two sections in the Western Hill near Beijing in NE China and several sections in the Korean Peninsula were selected to examine their geologic boundaries between Lower and Upper Paleozoic strata to compare their characteristic features. At four sites in the two sections in the Western Hill near Beijing were examined their contact relations. The Hui Yu section is the same horizon where one site is top of a quarry hill and the other of down hill. Mid-Carboniferous Qingshuijian Formation rests on the Ordovician Majiagou Formation. Limestone beds are more commonly intercalated with shale and sandstone at site 2 of the Hui Yu section, while at site 1, conglomerate beds are dominant. Site 1 of the Se Shu Fen section shows eroded and concealed karst topography and conglomerate beds are intercalated within shale beds. Silurian and Devonian strata are absent in these areas. In the Korean Peninsula, most O-C contacts occur between Ordovician limestone formation and Carboniferous strata, although Silurian strata occur beneath the Carboniferous strata in the Jeongseon area and Pyeongnam Basin. Most contact relations are parallel unconformity and angular unconformity is rarely seen. The O-C relations in both regions are similar to each other, and these indicate that the Korean Peninsula was located near or belonged to the Sino-Korean paraplatform during Paleozoic time. |
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| Keywords: | Ordovician-Carboniferous relations parallel unconformity Hui Yu Se Shu Fen Taebaegsan region |
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