Journal of the Geological Society of Korea (지질학회지)

The Geological Society of Korea (대한지질학회)
권호 표지

Preliminary study of AMS radiocarbon dating and geochemical analyses of the Quaternary sands at the Yonghanri area, Pohang

포항 용한리 지역의 퇴적지층에 대한 절대연령 측정 및 지화학 분석

Park, Myong-Ho;Kim, Ji-Hoon;Choi, Sung-Ja;Kil, Young-Woo;Song, Yun-Goo
박명호;김지훈;최성자;길영우;송윤구

  • Published : 2007.03.30

⟨ Previous Next ⟩

Abstract

There are two or three steps of marine terraces in the Yonghanri of the southeastern Korea. Aplatform of marine teraces is overlain by dune sand deposit, interbeded with organic muddy sands. We have done the 14C-AMS age dating and organic geochemical analyses for the organic muddy sands and topsoil on the marine terrace 10-20m in height. The calibrated 14C-AMS ages provide that the organic muddy sands and topsoil have using by the sedimentation rate and extrapolation method, it seems that the sediments on the marine deposit have ben deposited since at least 37.3 cal. kyr BP (middle MIS 3). According to elemental analysis (TOC/TN ratio), the organic matter of the late Quaternary deposits has been predominantly derived from a land vascular plant and partly from the marine organisms. Similarly, the results of Rock-Eval pyrolysis analysis show that the organic matter is plotted at the path of organic type III evolution and at the thermally immature stage. In particular, the at the backshore parallel to the beach. Moreover, sedimentary characteristics of the (paleo) sand dunes and soil deposits imply that the sediments would have been influenced by quasi-cyclic changes e.g. in climate and/or wind intensity during late Pleistocene to Recent.

경상북도 포항시 용한리에는 2-3조의 해안단구 지형이 발달하고 있다. 이 논문에서는 포항 일대에 발달하여 있는 지층을 연구하기 위한 예비연구로서 AMS 탄소연대 측정과 지화학 분석법을 이용하여 10-20 m 고도를 갖는 소위 제2 1차적으로 연구하였다. 사구층 내에는 최상부의 토양층 및 유기물 함유 이토질 모래층들이 협재되어 있다. AMS 탄소연대 측정 결과, 단구 상부의 유기물 함유 이토질 모래층들은 약 23.3 cal. kyr BP(MIS 2 후기) 이후부터 현재까지 퇴적되었다. 유기물 함유 이토질 모래층 하부의 사구층을 포함하면, 사구층(상부로부터 약 8 m 심도)은 적어도 37.3 cal. kyr BP(MIS 3 중기) 이후부터 퇴적되기 시작한 것으로 추정된다. 원소분석 결과는 지층 내 함유된 유기물이 대부분 육상식물 기원임을 지시하며, 부분적으로 해양생물 기원의 유기물도 함유하고 있음을 보여주고 있다. Rock-Eval 열분석 결과에서도 시료들이 모두 유기물 타이프 III(육상식물 기원)의 진화경로에 위치하고 있음을 보여준다. 특히, 연구지역의 퇴적지층은 육지 쪽으로 기운 층리면에 사층리가 발달한 풍성 기원의 퇴적물들로, 해안을 따라 후안 위치에 형성된 모래층들이 주를 이루고 있다. 더욱이, (고)사구 퇴적층과 토양층의 층서학적 특성을 보면, 연구지역의 지층은 플라이스토세 후기부터 홀로세 동안에 기후와 바람세기와 같은 준주기적 변화에 의해 영향을 받은 것으로 보인다. : 용한리, 사구, AMS 탄소연대 측정, MIS 3, 육상식물 기원Myong-Ho Park, Ji-Hoon Kim, Sung-Ja Choi, Young-Woo Kil and Yungoo Song, 2007, Preliminary study of AMS radiocarbon dating and geochemical analyses of the Quaternary sands at the Yonghanri area, Pohang. Journal of the Geological Society of Korea. v. 43, no.

Keywords

References

  1. 오건환, 1980, 한반도 동.서해안 중부에 분포하는 해성단구면의 대비. 부산여대 논문집, 8, 157-172
  2. 윤순옥, 황상일, 2000, 한국 남동해안 해안단구의 지형형성 mechanism. 대한지리학회지, 35, 17-38
  3. 정창식, 2002, 해안단구에 대한 연대측정. 지질학회지, 38, 279-291
  4. 정창식, 최정헌, 홍덕균, 이광식, 최성자, 최위찬, 정기영, 임창복, 장천중, 장호완, 2002, 경주시 양남면 관성 지역 제2단구 퇴적층의 OSL 연대. 한국암석학회.한국광물학회 공동학술회의 발표문, p. 35-36
  5. 최성자, 2004, 대보-구룡포-감포 지역의 해안단구(II). 자원환경지질, 37, 245-253
  6. 최성자, Merritts, D., Ota, Y., 최위찬, 류충렬, 임창복, 정창 식, 2002, 감포 기장간 해안단구 변위율 및 신기지구조운동. 자원환경지질학회 2002년도 요약문, p. 271-273
  7. 최위찬 외, 2000, 신기지각변형연구. 과학기술부, N2-01- 02-A-01, 19 p.
  8. 최정헌, 장호완, 김종욱, 정창식, 이광식, Murray, A.S., 2002, 경상북도 용한리 고사구층에 대한 OSL 연대측정. 대한지질학회 추계공동학술발표회 초록집, p. 84
  9. CALIB rev 4.3 (Data set 2), Program for calibration
  10. Choi, J.H., Murray, A.S., Jain, M., Cheong, C.-S. and Chang, H.W., 2003a, Luminescence dating of well-sorted marine terrace sediments on the southeastern coast of Korea. Quaternary Science Reviews, 22, 407-421 https://doi.org/10.1016/S0277-3791(02)00136-1
  11. Choi, J.H., Murray, A.S., Cheong, C.S., Hong, D.G. and Chang, H.W., 2003b, The resolution of stratigraphic inconsistency in the luminescence ages of marine terrace sediments from Korea. Quaternary Science Reviews, 22, 1201-1206 https://doi.org/10.1016/S0277-3791(03)00022-2
  12. Chun, J.H., Han, S.J. and Cheong, D.K., 1997, Tephrastratigraphy in the Ulleung Basin, East Sea: Late Pleistocene to Holocene. Geosciences Journal, 1, 154-166 https://doi.org/10.1007/BF02910207
  13. Chun, J.-H., Ikehara, K. and Han, S.-J., 2004, Evidence in Ulleung Basin sediment cores for a Termination II (penultimate deglaciation) eruption of the Aso-3 tephra. The Quaternary Research, 43, 99-112 https://doi.org/10.4116/jaqua.43.99
  14. Espitalie, J., Deroo, G. and Marquis, F., 1985, La pyrolysis Rock-Eval et ses applications: Revue de l'Institute Francasis du Petrole, 40, 563-579, 755-784
  15. Hunt, J.M., 1996, Petroleum Geochemistry and Geology. Freeman, New York, 743 p.
  16. Inoue, D. and Choi, W-H., 2006, The Activity of the Ulsan Fault System Based on Marine Terrace Age Study at the Southeastern Part of Korean Peninsula. Central Research Institute of Electric Power Industry, ISBN4-86216- 148-0, 83 p.
  17. Kim, S.W., 1973, A study on the terraces along the southeastern coast Bang-eojin-Pohang) of the Korean peninsula. Journal of the Geological Society of Korea, 9, 89-121
  18. Lee, D.Y., 1987, Stratigraphic research of the Quaternary deposits in the Korean Peninsula. Korean Journal of Quaternary Research, 1, 3-20
  19. Miukhopadhyay, P.K., Wade, J.A. and Kruge, M.A., 1995, Organic facies and maturation of Jurassic/Cretaceous rocks, and possible oil-source rock correlation based on pyrolysis of asphaltenes, Scotian Basin, Canada. Organic Geochemistry, 22, 85-104 https://doi.org/10.1016/0146-6380(95)90010-1
  20. Muller, P.J., 1977, C/N ratios in Pacific deep-sea sediments; effect of inorganic ammonium and organic nitrogen compounds sorbed by clays. Geochimica et Cosmichimica Acta, 41: 765-776 https://doi.org/10.1016/0016-7037(77)90047-3
  21. Oh, G.H., 1981, Marine terraces and their tectonic deformation on the coast of the southern part of the Korean Peninsula. Bull. Dept. Geography, University of Tokyo, v. 13, 61 p.
  22. Park, M.-H., Kim, I.-S. and Shin, J.-B., 2003, Characteristics of the late Quaternary tephra layers in the East/ Japan Sea and their new occurrences in western Ulleung Basin sediments. Marine Geology, 202, 135-142 https://doi.org/10.1016/S0025-3227(03)00287-1
  23. Park, M.-H., Kim, J.-H., Kim, I.-S., Ryu, B.-J. and Yu, K.-M., 2005, Tephrostratigraphy and paleo-environmental implications of late Quaternary sediments and interstitial water in the western Ulleung Basin, East/ Japan Sea. Geo-Marine Letters, 25, 54-62 https://doi.org/10.1007/s00367-004-0203-0
  24. Park, M.-H., Kim, J.-H., Ryu, B.-J., Kim, I.S. and Chang, H.-W., 2006, AMS radiocarbon dating of the marine late Pleistocene-Holocene sediment cores in the western Ulleung Basin, East/Japan Sea. Nuclear Instruments and Methods in Physics Research B, 243, 211-215 https://doi.org/10.1016/j.nimb.2005.08.120
  25. Prahl, F.G., Ertel J.R., Goni., M.A., Sparrow, M.A. and Eversmeyer, E., 1994, Terrestrial organic carbon contributions to sediments on the Washington margin. Geochimica et Cosmichimica Acta, 58, 3055-3048
  26. Silliman, J.E., Meyers, P.A. and Bourbonniere, R.A., 1996, Record of postglacial organic matter deliverly and burial in sediments of Lake Ontario. Organic Geochemistry, 24, 43-472 https://doi.org/10.1016/0146-6380(96)00007-1
  27. St-Onge, G. and Hillaire-Marcel., C., 2001, Isotopic constraints of sedimentary inputs and Organic carbon burial rates in the Saguenay Fjord, Quebec. Marine Geology, 176, 1-22 https://doi.org/10.1016/S0025-3227(01)00150-5
  28. Stevenson F.J. and Cheng, C.N., 1972, Organic geochemistry of the Argentine Basin Sediments; Carbon-nitrogen relationships and Quaternary correlations. Geochimica et Cosmichimica Acta, 36, 653-671 https://doi.org/10.1016/0016-7037(72)90109-3
  29. Stuiver, M. and Polach, H.A., 1977, Discussion: reporting of $^{14}C$ data. Radiocarbon, 19, 355-363
  30. Stuiver, M., Reimer, P.J., Bard, E., Beck, J.W., Burr, G.S., Hughen, K.A., Kromer, B., McCormac, F.G., van der Plicht, J. and Spurk, M., 1998, INTCAL 98 radiocarbon age calibration, 24,000-0 cal BP. Radiocarbon, 40, 1041-1083