Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Geochronological and Geochemical Studies for Triassic Plutons from the Wolhyeonri Complex in the Hongseong Area, Korea

홍성지역 월현리 복합체 내에 분포하는 트라이아스기 심성암류의 지질연대학 및 지구화학적 연구

  • Oh, Jae-Ho (Petoleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Sung Won (Geological Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 오재호 (한국지질자원연구원 석유해저연구본부) ;
  • 김성원 (한국지질자원연구원 국토지질연구본부)
  • Received : 2013.07.26
  • Accepted : 2013.10.09
  • Published : 2013.10.28
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Abstract

The Hongseong area of the southwestern Gyeonggi massif is considered to be part of suture zone that is tectonically correlated with the Qinling-Dabie-Sulu belt of China in terms of the preservation of collisional evidences during Triassic in age. The Wolhyeonri complex, preserved at the center of the Hongseong area, consists mainly of Neoproterozoic orthogneisses and Middle Paleozoic intermediate- to high-grade metamorphic schists, orthogneisses and mafic metavolcanics. The area includes various Middle to Late Triassic intrusives (e.g. dyke or stock). They are mainly monzonite and aplite with small intrusions of monzodiorit, syenite and diorite in composition. The SHRIMP U-Pb zircon ages yield 237 Ma to 222 Ma. The geochemistry of the studied Triassic intrusives show similar subuction- or arc-type signatures having Ta-Nb troughs, depletion of P and Ti, and enrichment of LILEs (large ion lithophile elements). In addition, the Triassic plutons in the Hongseong area, including those from this study, mostly possess high-K calc-alkaline to shoshonitic tectonic affinity. These results could be tectonically correlated to the post-collisional magmatic event following the Triassic collision between the North and South China blocks in China. Therefore, the Triassic plutons in the Hongseong area offer an important insight into the Triassic geodynamic history of the NE Asian region.

한국 경기육괴의 서남부 홍성지역은 지구조적으로 중국의 친링-다비에-수루대와 비교 연장되는 봉합대의 하나로 고려된다. 홍성지역의 중앙부에 위치하는 월현리복합체는 주로 신원생대의 편마암과 고생대 중기의 중-고변성의 편암, 정편마암과 변성염기성화산암으로 주로 구성된다. 이 지역은 트라이아스기 중기에서 말기까지의 암맥상 혹은 암주상의 다양한 관입암이 분포한다. 주 암상은 몬조니암과 반화강암으로 구성되며 부수적으로 소규모 암주상의 몬조섬록암, 섬장암과 섬록암 등이 산출된다. 연구지역 심성암에 대한 SHRIMP U-Pb 저어콘 연대결과는 237 Ma부터 222 Ma의 범위를 보여준다. 연구대상 트라이아스기 심성암은 TaNb의 골, P와 Ti의 결핍과 저장력 원소들이 부화된 경향을 가지는 섭입형 혹은 호상형과 유사한 지화학적 특징을 보여준다. 연구지역 트라이아스기 심성암과 홍성지역의 주 트라이아스기 심성암인 화강암-섬장암은 대부분 칼륨 함량이 높은 고칼륨 캘크-알칼라인에서 쇼쇼나이트까지의 지구조 특징을 가진다. 이들 결과들은 중국의 북중국판과 남중국판의 트라이아스기 충돌이후 생성된 후충돌형 마그마 사건의 지구조적 연결을 가능하게 한다. 결과적으로 홍성지역의 트라이아스기 심성암은 동북아시아의 지구조동력 역사 내 트라이아스기 봉합의 중요한 이해를 제공하여준다.

Keywords

References

  1. Cheng, C.-S. and Kim, N. (2012). Review of radiometric ages for Phanerozoic granitoids in the southern Korean Peninsula. Jour. Petrol. Soc. Korea, v.21, p.173-192. https://doi.org/10.7854/JPSK.2012.21.2.173
  2. Cho, D.-L., Lee, S.R. and Armstrong, R. (2008). Termination of the Permo-Triassic Songrim (Indosinian) orogeny in the Ogcheon belt, South Korea: Occurrence of ca. 220 Ma post-orogenic alkali granites and their tectonic implications. Lithos, v.105, p.191-200. https://doi.org/10.1016/j.lithos.2008.03.007
  3. Cho, M., Kim, Y. and Ahn, J. (2007) Metamorphic evolution of the Imjingang Belt, Korea: Implications for Permo-Triassic collisional orogeny. Int. Geol. Rev., v.49, p.30-51. https://doi.org/10.2747/0020-6814.49.1.30
  4. Choi, S.J., Kee, W.S., Koh, H.J., Kwon, C.W., Kim, B.C., Kim, S.W., Kim, Y.B., Khim, Y.H., Kim, H.C., Park, S.- I., Song, K.Y., Yeon, Y.K., Lee, S.R., Lee, S.S., Lee, S.R., Lee, Y.S., Lee, H.J., Cho, D.R., Choi, B.Y., Han, J.K., Hyeon, H.J., Hwang, J.H. and Lee, J.A. (2012) Tectonic evolution of the western Gyeonggi Block and construction of geologic DB system. Basic Research Report of the Korea Inst. Geosci. Mineral Res., 420p.
  5. Cohen, K.M., Finney, S. and Gibbard, P.L. (2013) Interaltional Chronostratigraphic Chart. International Commission on Stratigraphy of the International Union of Geological Sciences.
  6. Choi, S.G., Rajesh, V.J., Seo, J., Park, J.W., Oh, C.W., Pak, S.J. and Kim, S.W. (2009) Petrology, geochronology and tectonic implications of Mesozoic high Ba$^{\circ}{\copyright}$Sr granites in the Haemi area, Hongseong Belt, South Korea. Isl. Arc, v.18, p.266-281.
  7. 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 Sci. Rev., v.52, p.175-235. https://doi.org/10.1016/S0012-8252(00)00029-5
  8. Harris, N.B.W., Perce, J.A. and Tindle, A.G. (1986) Geochemical characteristics of collision-zone magmatism. In: Coward, M.P., Reis, A.C. (Eds.), Collision Tectonics. Blackwell, Oxford.
  9. Kee, W.S., Koh, H.J., Kim, S.W., Kim, Y.B., Khim, Y.H., Kim, H.C., Park, S.-I., Song, K.Y., Lee, S.R., Lee, Y.S., Lee, H.J., Cho, D.R., Choi, B.Y., Choi, S.J. and Hwang, J.H. (2011) Tectonic evolution of the upper crustal units in the mid-western part of the Korean peninsula. Basic Research Report of the Korea Inst. Geosci. Mineral Res., 242p.
  10. Kihm, Y.H. and Hwang, J.H. (2011) Geological report of the Gangneung-Jumunjin sheets (1:50,000). Daejon, Korea Inst. Geosci. Mineral Res., 62p.
  11. Kim, J.H. (1996) Mesozoic tectonics in Korea. Jour. Southeast Asian Earth Sci., v.13, p.251-265. https://doi.org/10.1016/0743-9547(96)00032-3
  12. Kim H.S. (2012) Metamorphic and deformation of the Late Paleozoic Pyeongan Supergroup in the Taebaeksan Basin: reviews on the Permo-Triassic Songrim orogeny. Jour. Petrol. Soc. Korea, v.21, p.151-171. https://doi.org/10.7854/JPSK.2012.21.2.151
  13. Kim, J., Yi, K., Jeong, Y.-J. and Cheong, C.-S. (2011) Geochronological and geochemical constraints on the petrogenesis of Mesozoic high-K granitoids in the central Korean peninsula. Gondwana Research v.20, p.608-620. https://doi.org/10.1016/j.gr.2010.12.005
  14. Kim, S.W. and Kee, W.-S. (2010) Geochronology and geochemical characteristics of metavolcanics from the Wolhyeonri tectonic complex in the Hongseong area, SW Gyeonggi Massif. Jour. Geol. Soc. Korea, v.46, p.453-471.
  15. Kim, S.W. and Koh, H.J. (2010) Petrochemistry of garnetbearing metabasite in marble at Shinri area in Hongseong and its tectonic implication. Jour. Petrol. Soc. Korea, v.19, p.209-225.
  16. Kim, S.W., Kwon, S., Koh, H.J., Yi, K., Jeong, Y. and Santosh, M. (2011) Geotectonic framework of Permo-Triassic magmatism within the Korean Peninsula. Gondwana Res., v.20, p.865-889. https://doi.org/10.1016/j.gr.2011.05.005
  17. Kim, S.W., Oh, C.W., Williams, I.S., Rubbato, D., Ryu, I.- C., Rajesh, V.J., Kim, C.-B., Guo, J. and Zhai, M. (2006) Phanerozoic high-pressure eclogite and intermediate- pressure granulite facies metamorphism in the Gyeonggi block, South Korea: implications for the eastward extension of the Dabie-Sulu continental collision zone. Lithos, v.92, p.357-377. https://doi.org/10.1016/j.lithos.2006.03.050
  18. Kim, Y.B., Choi, S.J., Chwae, U. and Kim, Y.J. (2012) Geological report of the Gimje sheet (1:50,000). Daejon, Korea Inst. Geosci. Mineral Res., 32p.
  19. Kwon, S., Kim, S.W. and Santosh, M. (2013) Multiple generations of mafic-ultramafic rocks from the Hongseong suture zone, western South Korea: Implications for the geodynamic evolution of NE Asia. Lithos, v.160-161, p.68-83. https://doi.org/10.1016/j.lithos.2012.11.011
  20. Kwon, S., Sajeev, K., Mitra, G., Park, Y., Kim, S.W. and Ryu, I.-C. (2009) Evidence for Permo-Triassic collision in Far East Asia: The Korean collisional orogen. Earth Planet. Sci. Lett., v.279, p.340-349. https://doi.org/10.1016/j.epsl.2009.01.016
  21. Lee, B.J., Kim, Y.B. and Kee, W.S. (2006) Geological report of the Gisan sheet (1:50,000). Daejon, Korea Inst. Geosci. Mineral Res., 39p.
  22. Lee, S.H. and Kim. S.S. (1963) Explanatory text of the Geological map of Hong Song Sheet. Geol. Sur. Korea, 33p.
  23. Ludwig, K.R. (2008) User's manual for Isoplot 3.6: a geochronological toolkit for Microsoft Excel. Berkeley, CA, Berkeley Geochronology Center Special Publication, v.4, 77p.
  24. Ludwig, K.R. (2009) SQUID 2: a user's manual. Berkeley, CA, Berkeley Geochronology Center Special Publication, n.2, 100p.
  25. Oh, C.W. (2012) The Tectonic evolution of South Korea and northeast Asia from Paleoproterozoic to Triassic. Jour. Petrol. Soc. Korea, v.21, p.99-114.
  26. Oh, C.W., Kim, S.W., Choi, S.G., Zhai, M., Guo, J. and Sajeev, K. (2005) First finding of eclogite facies metamorphic event in South Korea and its correlation with the Dabie-Sulu collision belt in China. Jour. Geol., v.113, p.226-232. https://doi.org/10.1086/427671
  27. Oh, C.W. and Kusky, T.M. (2007) The late Permian to Triassic Hongseong-Odesan collision belt in South Korea, and its tectonic correlation with China and Japan. Int. Geol. Rev., v.49, p.636-657. https://doi.org/10.2747/0020-6814.49.7.636
  28. Pearce, J.A. (1996) Sources and settings of granitic rocks. Episodes, v.19, p.120-125.
  29. Pearce, J.A., Harris, N.B.W. and Tindle, A.G. (1984) Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Jour. Petrol., v.25, p.956-983. https://doi.org/10.1093/petrology/25.4.956
  30. Peng, P., Zhai, M., Guo, J., Zhang, H. and Zhang, Y. (2008) Petrogenesis of Triassic postcollisional syenite plutons in the Sino-Korean craton: an example from North Korea. Geol. Mag., v.145, p.637-647.
  31. Sagong, H., Kwon, S.-T. and Ree, J.-H. (2005) Mesozoic episodic magmatism in South Korea and its tectonic implication. Tectonics, v.24. doi:10.1029/2004TC001720.
  32. Song, K.Y., Park, S.-I. and Cho, D.-L. (2011) Geological report of the Sokcho-Yangyang sheet (1:50,000). Daejon, Korea Inst. Geosci. Mineral Res., 68p.
  33. Seo, J., Choi, S.-G. and Oh, C.W. (2010) Petrology, geochemistry, and geochronology of the post-collisional Triassic mangerite and syenite in the Gwangcheon area, Hongseong Belt, South Korea. Gondwana Res., v.18, p.479-496. https://doi.org/10.1016/j.gr.2009.12.009
  34. Seo, J., Choi, S.G., Oh, C.W., Kim, S.W. and Song, S.H. (2005) Genetic implications of two different ultramafic rocks from Hongseong area in the southwestern Gyeonggi Massif, South Korea. Gondwana Res., v.8, p.539-552. https://doi.org/10.1016/S1342-937X(05)71154-0
  35. Steiger, R. and Jger, E. (1977) Subcommission of geochronology: convention on the use of decay constants in geo- and cosmo-chronology. Earth Planet. Sci. Lett., v.36, p.359-362. https://doi.org/10.1016/0012-821X(77)90060-7
  36. Streckeisen, A.L. (1976) To each plutonic rock its proper name. Earth Sci. Rev., v.12, p.1-33. https://doi.org/10.1016/0012-8252(76)90052-0
  37. Sun, S.S. and McDonough, W.F, (1989) Chemical and isotopic systematics of oceanic basalt: implications for mantle composition and process. In: Saunders, A.D., Norry, M.J. (Eds), Magmatism in the Ocean Basins. Geol. Soc. London. Special Publ., v.42, p.313-345.
  38. Williams, I.S., 1998. U-Th-Pb geochronology by ion microprobe. In: McKibben, M.A., Shanks, W.C.III., Ridley, W.L.(eds.), Applications of Microanalytical Techniques to Understanding Mineralizing Processes. Society of Economic Geologists, Socorro, Rev. Econ. Geol., 7, 1-35.
  39. Williams, I. S., Cho, D.-L. and Kim, S. W. (2009) Geochronology, and geochemical and Nd-Sr isotopic characteristics, of Triassic plutonic rocks in the Gyeonggi Massif, South Korea: Constraints on Triassic post-collisional magmatism. Lithos, v.107, p.239-256. https://doi.org/10.1016/j.lithos.2008.10.017
  40. Yang, J.-H., Chung, S.-L., Wilde, S.A., Wu, F.-Y., Chu, M.- F., Lo, Q.-H. and Fan, H.-R. (2005) Petrogenesisof post-orogenic syenites in the Sulu Orogenic Belt, East China: geochronological, geochemical and Nd-Sr isotopic evidence. Chem. Geol., v.214, p.99-125. https://doi.org/10.1016/j.chemgeo.2004.08.053
  41. Zhai, M., Guo, J., Li, Z., Chen, D., Peng, P., Li, T., Hou, Q. and Fan, Q. (2007) Linking the Sulu UHP belt to the Korean Peninsula: evidence from eclogite, Precambrian basement, and Paleozoic sedimentary basins. Gondwana Res., v.12, p.388-403. https://doi.org/10.1016/j.gr.2007.02.003
  42. Zhao, Z.-F., Zheng, Y.-F., Zhang, J., Dai, L.-Q., Li, Q, and Liu, X. (2012) Syn-exhumation magmatism during continental collision: Evidence from alkaline intrusives of Triassic age in the Sulu orogen. Chem. Geol., v.328, p.70-88. https://doi.org/10.1016/j.chemgeo.2011.11.002

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