Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
권호 표지

Holocene Glaciomarine Sedimentation in Marian Cove, King George Island, West Antarctica

서 남극 킹조지 섬 마리안 소만의 홀로세 빙해양 퇴적작용

  • Chang, Soon-Keun (Polar Research Canter, Korea Ocean Research and Development Institute) ;
  • Yoon, Ho-Il (Polar Research Canter, Korea Ocean Research and Development Institute)
  • 장순근 (한국해양연구소 극지연구센터) ;
  • 윤호일 (한국해양연구소 극지연구센터)
  • Published : 2000.06.28
Download PDF
⟨ Previous Next ⟩

Abstract

A 2.3 m-long core obtained from Marian Cove, King George Island in the South Shetland Islands, West Antarctica shows clues to the glaciomarine sedimentation during the Holocene. The lower part below 115cm-deep of the core is predominated by coarser material such as diamictons compared with the higher part above 105cm dominated by finer material (rhythmite and massive muds). Based on the granulometric features the coarse materials are generally supposed to be glacially-driven and basal tills, whereas the fine materials appear to originate from various sources such as meltwater-supplied, glacially-supplied, wind-blown, and organic origins. However, the presence of erratic coarse particles in the finer materials suggests the ice-rafted origin of the relevant materials. The lower part below 105cm-deep of the core was characterized by lower TN, TC, and TOC contents, and by higher TS and CaCO$_3$ contents compared with its upper part. No significant changes in C/N ratio were shown throughout the core. The ice cliff along the east side of Marian Cove seemed to locate to the west by 1.6km at 8,300 years B. P. on the basis of the repetitive occurrence of rhythmite and diamicton. Since the retreat of ice cliff in 7,970${\pm}$70 years B. P. the sediments of Marian Cove were dominated by fine materials and ice-rafted materials. The abrupt increase of coarse materials in 175cm-4 deep seems to result from supply of coarse materials due to earthquake or other drastic phenomena.

서남극 남쉐틀랜드 군도 킹조지 섬 마리안 소만에서 중력시추기로 얻은 길이 2.3 m의 시추퇴적물은 홀로세 동안 이 지역에서 일어났던 빙해양 퇴적작용의 특성을 보여준다. 층준 115 cm를 기준으로 상부층과 하부층으로 나뉘어진다. 하부층은 조립질 물질이 우세하며 상부는 리드마이트와 괴상(塊狀) 니질(泥質) 층이 우세하다. 상부층에서 우세한 조립물질은 보통 빙하로 운반된 물질과 이미 존재하던 빙퇴석으로 구성되는 바, 세립물질은 융빙수, 빙하,바람으로 공급된 육성기원 쇄설물이 대부분이며 생물기원물질도 상당량 혼재되었다. 세립물질 내에 포함된 조립물질은 유빙운반물질로 해석된다. 깊이 105cm의 아래부분은 질소 총량, 탄소 총량, 유기물 총량이 적은 반면 유황 총량과 탄산칼슘 총량은 많다. 유기물 총량과 질소총량 사이의 비(C/N ratio)는 대체로 큰 변화가 없다. 현재의 마리안소만 동쪽 빙벽은 리드마이트와 빙퇴석의 산출시기를 고려할 때 지금부터 8,300년 전에는 1.6km 서쪽에 위치했던 것으로 보인다. 마리안소만의 퇴적물은 7,970${\pm}$70년 전 빙벽이 시추심 위치에서 후퇴하면서 세립물질과 유빙운반물질이 우세해졌다.

Keywords

References

  1. 한국해양연구소, BSPN 00258-822-7 세종기지 주변 수심 및 육상측량 (Ⅱ). 남극환경특성 및 보존에 관한 연구 김용권;백원대
  2. 한국해양학회지 바다 v.4 남극 킹죠지 섬 마리안 소만의 하계 수층 특성과 부유물질 분산 유규철;윤호일;오재경;김예동;강천윤
  3. 한국극지연구 v.3 남극 킹죠지섬 바톤반도의 지의류의 식생분포 이주삼
  4. 한국지구과학회지 v.18 남극 세종기지부근의 지면의 특징 장순근
  5. 한국극지연구 v.1 3.5kHz 음향기록을 이용한 King George 섬 Maxwell 만의 해양지질 최동림;남상헌;오재경
  6. 한국극지연구 v.2 마리안소만의 퇴적환경과 주변의 고빙하 분포 상 홍성민;박병권;윤호일;김예동;오재경
  7. Science Report v.78 no.81 The Geology of the South Shetland Islands: V. Volcanic Eruption of Deception Island. British Antarctic Survey Baker, P. E.;McReath, I.;Harvey, M. R.;Roobol, M. J.;Davies, T. G.
  8. Marine Geology (in press) Foraminiferal assemblages and CaCO₃dissolution since the Last Deglaciation in the Maxwell Bay, King George Island, Antarctica Baohua Li;Yoon, H. I.;Park, B. K.
  9. Early Diagenesis: A Theoretical Approach Berner, R. A.
  10. Journal of Sedimentary Research v.69 Grain-size and textural classification of coarse sedimentary particles Blair, T. C.;McPherson, J. G.
  11. Boreas v.11 Sedimentology of glacial and glacial marine deposits on the George V-Adelie continental shelf, East Antarctica Domack, E. W.
  12. Antarctic Journal of U. S. v.27 Modern carbon-14 ages and reservooir corrections for the Antarctic Peninsula and Gerlache Strait area Domack, E. W.
  13. Journal of Sedimenatary Petrology v.50 Clast shape as an indicator of transport and depositional mechanisms in glacial marine sediments: George V Continental Shelf, Antarctica Domack, E. W.;Anderson, J. B.;Kurtz, D. D.
  14. Quaternary Research v.31 Application of Tandem accelerator mass-spectrometer dating to Late Pleistocene-Holocene sediments of the East Antarctic continental shelf Domack, E. W.;Jull, A. J. T.;Anderson, J. B.;Linick, T. W.;Williams, C. R.
  15. Geology v.19 Advance of East Antarctic outlet glaciers during the Hypsithermal: Implications for the volume state of the Antarctic ice sheet under global warming Domack, E. W.;Jull, A. J. T.;Nakao, S.
  16. Journal of Sedimentary Petrology v.27 Brazos river bars. A study in the significance of grain size parameters Folk, R. L.;Ward, W. C.
  17. Quaternary Science Review v.11 Magnitude and geographic variation of the radiocarbon content in Antarctic marine life: Implications for reservoir corrections in radiocarbon dating Gordon, J. E.;Harkness, D. D.
  18. Marine Geology v.103 Developing sediment geochronologies for high-latitude continental shelf deposits: A radiochemical approach Harden, S. L.;Demaster, D. J.;Nittrouer, C. A.
  19. Korean Journal of Polar Research v.2 High resolution seismic survey of Maxwell Bay, King George Island: Glacial marine sedimentation and tectonics Kim, Y.;Nam, S. H.
  20. Geoscience Journal v.3 Geochemical evidence for Holocene paleoclimatic changes in Maxwell Bay of South Shetland Islands, West Antarctica Kim, D.;Park, B.K.;Yoon, H.I.;Kang, C. Y.
  21. Economic Geology v.73 The quartz-pyrite rock of the South Shetland Islands Littlefair, M. J.
  22. Polish Polar Research v.1 Distribution and quantity of suspended matter in Admiralty Bay, King George Isaland, West Antarctica Pecherzewsk, K.
  23. Annals of Glaciology v.27 Recent retreat of ice cliffs, King George Island, South Shetland Islands Park, B. K.;Chang, S.K.;Yoon, H. I.;Chung, H.
  24. Radiocarbon v.35 Modeling atmospheric $^{14}C$ influences and $^{14}C$ ages of marine samples to 10000 BC Stuiver, M.;Brazinius, T. F.
  25. Quatemary Research v.35 Climatic, solar, oceanic, and geomagnetic influences on Late-glacial and Holocene atmospheric $^{14}C/^{12}C$ change Stuiver, M;Brazinius, T. F.;Becker, B.;Kromer, B.
  26. The last great ice sheet History of the marine ice sheet in West Antarctica during the last glaciation: a working hypothesis Stuiver, M.;Denton, G. H.;Hughes, T. J.;Fastook, J. L.;G.H. Denton(ed.);T. J. Hughes(ed.)
  27. Marine Geology v.140 Glaciomarine sedimentation and palaeo-glacial setting of Maxwell Bay and its tributary embayment, Marian Cove, South Shetland Islands, West Antarctica Yoon, H. I.;Han, M. W.;Park, B. K.;Oh, J. K.;Chang, S. K.
  28. Korean Journal of Polar Research v.7 Distribution and dispersal pattern of suspended particulate matter in Maxwell Bay and its tributary, Marian Cove, in the South Shetland Islands, Antarctica Yoon, H. I.;Park, B. K.
  29. Marine Geology v.152 Distribution and dispersal pattern of suspended particulate matter in Maxwell Bay and its tributary, Marian Cove, in the South Shetland Islands, West Antarctica Yoon H. I.;Park, B. K.;Domack, E. W.;Kim, Y.