Ocean and Polar Research

  • 제36권4호
  • /
  • Pages.407-421
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  • 2014
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  • 1598-141X(pISSN)
  • /
  • 2234-7313(eISSN)
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)
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심해 저층환경충격 시험지역의 퇴적물 지화학적 특성

Geochemical Properties of Deep Sea Sediment in the Benthic Environmental Impact Experiment Site (BIS) of Korea

  • 공기수 (한국지질자원연구원 석유해저연구본부) ;
  • 형기성 (한국해양과학기술원 심해저광물자원연구센터) ;
  • 최헌수 (한국지질자원연구원 석유해저연구본부) ;
  • 지상범 (한국해양과학기술원 심해저광물자원연구센터)
  • 투고 : 2014.10.06
  • 심사 : 2014.11.27
  • 발행 : 2014.12.30
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초록

The benthic environmental impact experiment addresses environmental impacts at a specific site related to deep-sea mineral resource development. We have acquired several tens of multi- or box core samples at 31 sites within the Benthic environmental Impact Site (BIS) since 2010, aiming to examine the basic properties of surficial deep-sea sediment as a potential source for deep-water plumes. In this study, we present the geochemical properties such as major elements, rare earth elements (REEs), and heavy metal contents at the BIS. Such proxies vary distinctly according to the Facies association. The lithology of all core sediments in the BIS corresponds to both Association Ib and Association IIIb. The vertical profiles of some major elements ($SiO_2$, $Fe_2O_3$, CaO, $P_2O_5$, MgO, MnO) show noticeable differences between Association Ib and IIIb, while others ($Al_2O_3$, $TiO_2$, $Na_2O$, and $K_2O$) do not vary between Association Ib and IIIb. REEs are also distinctly different for Associations Ib and IIIb; in Association Ib, REY and HREE/LREE are uniform through the sediment section, while they increase downward in Association IIIb like the major elements; below a depth of 8 cm, REY is over 500 ppm. The metal enrichment factor (EF) evaluates the anthropogenic influences of some metals (Cu, Ni, Pb, Zn, and Cd) in marine sediments. In both Associations, the EF for Cu is over 1.5, the EF for Ni and Pb ranges from 0.5 to 1.5, and the EF for Zn and Cd are less than 0.5, indicating Cu is enriched but Zn and Cd are relatively depleted in the BIS. The vertical variations of geochemical properties between Association Ib and IIIb are shown to be clearly different, which seems to be related to the global climate changes such as the shift of Intertropical convergence zone (ITCZ).

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참고문헌

  1. 해양수산부 (2004) 심해저 광물자원 탐사 보고서 I 자원탐사 및 환경연구. 한국해양연구원, 770 p(MOF (2004) Deepsea mineral resources research report I Resource exploration and environmental study. KORDI, 770 p (in Korean))
  2. 해양수산부 (2007) 심해저 광물자원개발사업보고서 I 자원탐사 및 환경연구. 한국해양연구원, 755 p(MOF (2007) Deepsea mineral resources research report I Resource exploration and environmental study. KORDI, 755 p (in Korean))
  3. 해양수산부 (2008) 심해저 광물자원개발사업보고서 I 자원탐사 및 환경연구. 한국해양연구원, 760 p(MOF (2008) Deepsea mineral resources research report I Resource exploration and environmental study. KORDI, 760 p (in Korean))
  4. 국토해양부 (2009) 심해저 광물자원개발사업보고서 I 자원탐사 및 환경연구. 한국해양연구원, 580 p(MLTM (2009) Deepsea mineral resources research report I Resource exploration and environmental study. KORDI, 580 p (in Korean))
  5. 국토해양부 (2010) 심해저 광물자원개발사업보고서 I 자원탐사 및 환경연구. 한국해양연구원, 596 p(MLTM (2010) Deepsea mineral resources research report I Resource exploration and environmental study. KORDI, 596 p (in Korean))
  6. Banakar VK, Jauhari P (1994) Geochemical trends in the sediments and manganese nodules from a part of the Central Indian Basin. J Geol Soc India 43:591-598
  7. Baturin GN (1988) The geochemistry of manganese and manganese nodules in the ocean. D. Reidel Publishing Company, Dordrecht, Boston, Lancaster and Tokyo, 342 p
  8. Eby GN (2004) Principle of environmental geochemistry. Thomson brooks, 514 p
  9. Glasby GP, Gwozdz R, Kunzendrof H, Friedrich G, Thijssen T (1987) The distribution of rare earth and minor elements in manganese nodules and sediments from the equatorial and S.W. Pacific. Lithos 20:97-113 https://doi.org/10.1016/0024-4937(87)90001-6
  10. Halbach P, Friedrich G, von Stackelberg U (1988) The manganese nodule belt of the Pacific Ocean: geological environment, nodule formation and mining aspects. Ferdinand Enke Verlag, Stuttgart, 140 p
  11. Hyeong K, Park SH, Yoo CM, Kim KH (2005) Mineralogical and geochemical compositions of the eolian dust from the northeast equatorial Pacific and their implications on paleolocation of the Intertropical Convergence Zone. Paleoceanography 20:PA1010
  12. International Seabed Authority (2010) A geological model of polymetallic nodule deposits in the Clarion-Clipperton Fracture Zone. ISA technical study no. 6, 151 p
  13. Johnson DA (1972) Ocean-floor erosion in the equatorial Pacific. Geol Soc Am Bull 83:3121-3144 https://doi.org/10.1130/0016-7606(1972)83[3121:OEITEP]2.0.CO;2
  14. Jung HS, Lee CB, Jeong KS, Kang JK (1998) Geochemical and Mineralogical characteristics in two color core sediments from the Korea Deep Ocean Study (KODOS) area, northeast equatorial Pacific. Mar Geol 144:295-309 https://doi.org/10.1016/S0025-3227(97)00108-4
  15. Keller G, Barron JA (1983) Paleoceanographic implications of Miocene deep-sea hiatuses. Geol Soc Am Bull 94(5):590-613 https://doi.org/10.1130/0016-7606(1983)94<590:PIOMDH>2.0.CO;2
  16. Kim J, Hyeong KS, Lee HB, Ko YT (2012) Relationship between polymetallic nodule genesis and sediment distribution in the KODOS(Korea Deep Ocean Study) area, Northeastern Pacific. Ocean Sci J 47(3):197-207 https://doi.org/10.1007/s12601-012-0020-8
  17. Leinen M (1979) Biogenic silica accumulation in the central equatorial Pacific and its implication for Cenozoic paleoceanography: Summary. Geol Soc Am Bull 90:803
  18. Leinen M, Stakes D (1979) Metal accumulation rates in the central equatorial Pacific during Cenozoic time. Geol Soc Am Bull 90:357-375 https://doi.org/10.1130/0016-7606(1979)90<357:MARITC>2.0.CO;2
  19. Martin JM, Whitfield M (1983) The significance of the river input of chemical elements to the ocean. In: Wong CS (ed) Trace metals in seawater. Proc NATO Adv Res Inst, Plenum Press, pp 265-296
  20. Morgan CL, Odunton NA, Jones AT (1999) Synthesis of environmental impacts of deep seabed mining. Mar Georesour Geotech 17(4):307-356 https://doi.org/10.1080/106411999273666
  21. Nath BN, Pluger WL, Roelandts I (1997) Geochemical constraints on the hydrothermal origin of ferromanganese encrustations from the Rodriguez Triple Junction, Indian Ocean. In: Nicholson HK, Buhn KR, Dasgupta S (eds) Manganese mineralization: geochemistry and mineralogy of terrestrial and marine deposits. Geol Soc London, 370 p
  22. Schnetger B, Brumsack HJ, Schale H, Hinriches J, Dittert L (2000) Geochemical characteristics of deep-sea sediments from the Arabian Sea: a high-resolution study. Deep-Sea Res II 47:2735-2768 https://doi.org/10.1016/S0967-0645(00)00047-3
  23. Toyoda K, Nakamura Y, Masuda A (1990) Rare earth elements of Pacific pelagic sediment. Geochim Cosmochim Acta 54:1093-1103 https://doi.org/10.1016/0016-7037(90)90441-M
  24. Valsangkar AB (2003) Deep-sea polymetallic nodule mining: challenges ahead for technologists and environmentalists. Mar Georesour Geotech 21(2):81-91 https://doi.org/10.1080/716100481
  25. Yasuda H (1997) Late miocene-holocene paleoceanography of the western equatorial Atlantic: evidence from deepsea benthic foraminifera. Proc Ocean Drill Program Sci Results 154:395-432
  26. Zhang J, Liu CL (2002) Riverine composition and estuarine geochemistry of particulate metals in China-Weathering features, anthropogenic impact and chemical fluxes. Estuar Coast Shelf Sci 54:1051-1070 https://doi.org/10.1006/ecss.2001.0879