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High-Resolution (3.5kHz) Echo Characters of the Northern South Shetland Continental Margin and the South Scotia Sea, Antarctica
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  • Journal title : Ocean and Polar Research
  • Volume 25, Issue 4,  2003, pp.557-567
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2003.25.4.557
 Title & Authors
High-Resolution (3.5kHz) Echo Characters of the Northern South Shetland Continental Margin and the South Scotia Sea, Antarctica
Lee, Sang-Hoon; Jin, Young-Keun; Kim, Kyu-Jung; Nam, Sang-Heon; Kim, Yea-Dong;
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 Abstract
High-resolution (3.5 kHz) subbottom profiles were analyzed in order to reveal sedimentation pattern of late Quaternary in the northern South Shetland continental margin and the South Scotia Sea, Antarctica. On the basis of clarity, continuity and geometry of surface and subbottom echoes together with seafloor topography, high-resolution echo characters are classified into eight echo types which represent rock basements (echo type III-1), coarse-grained subglacial till or moraine (echo type I-1), slides/slumps (echo type IV), debris-flow deposits (echo types II-3 and III-2), and bottom-current deposits (echo types I-2, II-1 and II-2). Subglacial till or moraine (echo type I-1) is mostly present in the lower continental shelf and upper continental slope of the northern South Shetland continental margin, which changes downslope to slides/slumps (echo type IV) and debris-flow deposits (echo types II-3 and III-2) in the middle to lower continental slope. This distribution suggests that the continental slopes of the northern South Shetland continental margin were mostly affected by downslope gravitational processes. Further downslope, bottom-current sediments (echo type I-2) deposited by the southwestward flowing Antarctic Deep Water (ADW) occur at the South Shetland Trench, reflecting an Interaction between mass flows and bottom currents in the area. In contrast to the northern South Shetland continental margin, the South Scotia Sea is dominated by bottom-current deposits (echo types II-1 and II-2), indicating that the sedimentation was mostly controlled by the westward flowing ADW. Flow intensity of the ADW has increased in the relative topographic highs, forming thin covers of coarse-grained contourites (echo type II-1), whereas it has decreased in the relative topographic lows, depositing thick, fine-grained contourites (echo type II-2). The poor development of wave geometry in the fine-grained bottom-current deposits (echo type II-2) is suggestive of the unsteady nature of the ADW flow.
 Keywords
high-resolution acoustic characters;late Quaternary sedimentation;mass-flow and bottom-current deposits;northern South Shetland continental margin;South Scotia Sea;
 Language
Korean
 Cited by
1.
남극 남쉐틀랜드 군도 북부 대륙주변부의 후기 제 4기 퇴적작용,윤석훈;윤호일;강천윤;

한국해양학회지:바다, 2004. vol.9. 1, pp.1-12
 References
1.
윤석훈, 윤호일, J. Howe. 2002. 남극 브랜스필드 해협 해저 퇴적층의 고해상 탄성파상 분석. 지질학회지, 38, 537-550.

2.
Banfield, L.A. and J.B. Anderson. 1995. Seismic facies investigation of the late Quaternary glacial history of Bransfield Basin, Antarctica. Antarctic Res. Series, 68, 123-140.

3.
Camerlenghi, A., A. Crise, C.J. Pudsey, E. Accerboni, R. Laterza, and M. Rebesco. 1997. Ten-month observation of the bottom current regime across a sediment drift of the Pacific margin of the Antarctic Peninsula. Antarct. Sci., 9, 426-433.

4.
Carter, L. and I.N. McCave. 1994. Development of sediment drifts approaching an active plate margin under the SW Pacific Deep Western Boundary Undercurrent. Paleoceanography, 9, 1061-1085. crossref(new window)

5.
Chough, S.K., K.S. Jeong, and E. Honza. 1985a. Zoned facies of mass-flow deposits in the Ulleung (Tsushima) basin, East Sea (Sea of Japan). Mar. Geol., 65, 113-125. crossref(new window)

6.
Chough, S.K., D.C. Mosher, and S.P. Srivastava. 1985b. Ocean Drilling Program (ODP) site survey (Hudson 84-30) in the Labrador Sea: 3.5 kHz profiles. Geological Survey of Canada, Paper, 85-1B, 33-41.

7.
Chough, S.K., S.H. Lee, J.W. Kim, S.C, Park, D.G. Yoo, H.S. Han, S.H. Yoon, S.B. Oh, Y.B. Kim, and G.G. Back. 1997. Chirp (2 7 kHz) echo characters in the Ulleung Basin. Geosciences J., 1, 143-153. crossref(new window)

8.
Damuth, J.E. 1975. Echo character of the western Equatorial Atlantic floor and its relationship to dispersal and distribution of terrigenous sediments. Mar. Geol., 18, 17-45. crossref(new window)

9.
Damuth, J.E. 1978. Echo character of the Norwegian-Greenland Sea: relationship to Quaternary sedimentation. Mar. Geol., 28, 1-36. crossref(new window)

10.
Damuth, J.E. 1980. Use of high-frequency (3.5-12 kHz) echograms in the study of near-bottom sedimentation processes in the deep-sea: a review. Mar. Geol., 38, 51-75. crossref(new window)

11.
Damuth, J.E. and R.W. Embley. 1981. Mass-transport processes on Amazon Cone: western equatorial Atlantic. AAPG Bull., 65, 629-643.

12.
Damuth, J.E. and D.E. Hayes. 1977. Echo character of the east Brazilian continental margin and its relationship to sedimentary processes. Mar. Geol., 24, 73-95. crossref(new window)

13.
Domack, E.W. and S. Ishman. 1993. Oceanographic and physiographic controls on modern sedimentation within Antarctic fjords. Geol. Soc. Am. Bull., 105, 1175-1189. crossref(new window)

14.
Embley, R.W. 1976. New evidence for occurrence of debris flow deposits in the deep sea. Geology, 4, 371-374. crossref(new window)

15.
Embley, R.W. and R.D. Jacobi. 1977. Distribution and morphology of large submarine sediment slides and slumps on Atlantic continental margins. Mar. Geotechnol., 2, 205-228. crossref(new window)

16.
Faugeres, J.C. and D.A.W. Stow. 1993. Bottom-currentcontrolled sedimentation: a synthesis of the contourite problem. Sed. Geol., 82, 287-297. crossref(new window)

17.
Faugeres, J.C., D.A.W. Stow, P. Imbert, and A. Viana. 1999. Seismic features diagnostic of contourite drifts. Mar. Geol., 162, 1-38. crossref(new window)

18.
Flood, R.D. and A.N. Shor. 1988. Mud waves in the Argentine Basin and their relationship to regional bottom circulation patterns. Deep-Sea Res., 35, 943-971. crossref(new window)

19.
Flood, R.D., A.N. Shor, and P.L. Manley. 1993. Morphology of abyssal mudwaves at Project MUDWAVES sites in the Argentine Basin. Deep-Sea Res., 40, 859-888. crossref(new window)

20.
Gonzalez-Casado, J.M., J.L. Giner-Robies, and J. Lopez-Martinez. 2000. Bransfield Basin, Antarctic Peninsula: Not a normal backarc basin. Geology, 28, 1043-1046. crossref(new window)

21.
Grose, T.J., J.A. Johnson, and G.R. Bigg. 1995. A comparison betwen the FRAM (Fine Resolution Antarctic Model) results and observations in the Drake Passage. Deep-Sea Res., 42, 365-388. crossref(new window)

22.
Howe, J.A. 1996. Turbidite and contourite sediment waves in the northern Rockall Trough, North Atlantic Ocean. Sedimentology, 43, 219-234. crossref(new window)

23.
Howe, J.A. and C.J. Pudsey. 1999. Antarctic circumpolar deep water: a Quaternary paleoflow record from the northern Scotia Sea, south Atlantic Ocean. J. Sediment. Res., 69, 847-861. crossref(new window)

24.
Howe, J.A., R.A. Livermore, and A. Maldonado. 1998. Mudwave activity and current-controlled sedimentation in Powell Basin, northern Weddell Sea, Antarctica. Mar. Geol., 149, 229-241. crossref(new window)

25.
Howe, J.A., M.S. Stoker, and D.A.V. Stow. 1994. A Late Cenozoic sediment drift complex, northeast Rockall Trough, North Atlantic. Paleoceanography, 9, 989-999. crossref(new window)

26.
Jin, Y.K., Y. Kim, H.S. Kim, and S.H. Nam. 1996. Preliminary results of seismic survey in the central Bransfield Strait, Antarctic Peninsula. Proc. NIPR Symp. Antract. Geosci., 9, 141-149.

27.
Jin, Y.K., Y. Kim, S.H. Nam, and K.J. Kim. 2000. Morpho tectonic variation of the Shackleton Fracture Zone around the Antarctic-Scotica plate boundary off the northern Antarctic Peninsula. Korean J. Geophys., 3, 210-218.

28.
Kim, Y., Y.K. Jin, and S.H. Nam. 1997. Crustal structure of the Shackleton Fracture Zone in the southwestern Scotia Sea. p. 661-667. In: The Antarctic Region: Geological Evolution and Process. ed. by C.A. Ricci. Terra Antarctic Publication, Siena.

29.
Klepies, K.A. and L.A. Lawver. 1996. Tectonics of the Antarctic-Scotia plate boudnary near Elephant and Clarence Islands, West Antarctica. J. Geophys. Res., 89, 20211-20231.

30.
Lee, S.H., S.K. Chough, G.G. Back, Y.B. Kim, and B.S. Sung. 1999. Gradual downslope change in high-resolution acoustic characters and geometry of large-scale submarine debris lobes in Ulleung Basin, East Sea (Sea of Japan), Korea. Geo-Mar. Lett., 19, 254-261. crossref(new window)

31.
Lee, S.H., S.K. Chough, G.G. Back, and Y.B. Kim. 2002. Chirp (2-7 kHz) echo characters of the South Korea Plateau: styles of mass movement and sediment gravity flow. Mar. Geol., 184, 227-247. crossref(new window)

32.
Masson, D.G. 2001. Sedimentary processes shaping the eastern slope of the Faeroe-Shetland Channel. Cont. Shelf Res., 21, 825-857. crossref(new window)

33.
Masson, D.G., Q.J. Huggett, and D. Brunsden. 1993. The surface texture of the Saharan Debris flow deposit and some speculations on submarine debris flow processes. Sedimentology, 40, 583-598. crossref(new window)

34.
Middleton, G.V. and M.A. Hampton. 1973. Mechanics of flow and deposition. p. 1-38. In: Turbidites and Deep Water Sedimentation. ed. by A.H. Bouma. SEPM, Pacific Section. Short Course.

35.
Nardin, T.R., F.J. Hein, D.S. Gorsline, and B.D. Edwards. 1979. A review of mass movement processes, sediment and acoustic characteristics in slope and base-of-slope systems versus canyon-fan-basinfloor systems. p. 61-73. In: Geology of Continental Slopes. ed. by L.J. Doyle and O.H. Pilkey. SEPM Spec. Publ., 27.

36.
Nowlin, W.D. and W. Zenk. 1988. Westward bottom currents along the margin of the South Shetland Island Arc. Deep-Sea Res., 35, 269-301. crossref(new window)

37.
Orsi, A.H., T. Whitworth III, and W.D. Nowlin. 1995. On the meridional extent and fronts of the Antarctic Circumpolar Current. Deep-Sea Res., 42, 641-673. crossref(new window)

38.
Palayo, A.M. and D.A. Wiens. 1989. Seismotectonics and relative plate motion in the Scotia Sea region. J. Geophys. Res., 94, 7293-7320. crossref(new window)

39.
Pope, P.G. and J.B. Anderson. 1992. Late Quaternary glacial history of the northern Antarctic Peninsula's western continental shelf: evidence from the marine record. Antarctic Research Series, 57, 63-91. crossref(new window)

40.
Pratson, L.F. and E.P. Laine. 1989. The relative importance of gravity-induced versus current-controlled sedimentation during the Quaternary along the mideast United-States outer continental-margin revealed by 3.5 KHz echo character. Mar. Geol., 89, 87-126. crossref(new window)

41.
Pudsey, C.J. 2000. Sedimentation on the continental rise west of the Antarctic Peninsula over the last three glacial cycles. Mar. Geol., 167, 313-338. crossref(new window)

42.
Pudsey, C.J. and J.A. Howe. 1998. Quaternary history of the Antarctic Circumpolar Current: evidence from the Scotia Sea. Mar. Geol., 148, 83-112. crossref(new window)

43.
Pudsey, C.J., P.F. Barker, and R.D. Larter. 1994. Ice sheet retreat from the Antarctic Peninsula shelf. Cont. Shelf Res., 14, 1647-1675. crossref(new window)

44.
Pudsey, C.J., J.A. Howe, P. Morris, and D.E. Gunn. 2002. Processes on sediment drifts from 3.5 kHz data, Antarctic Peninsula continental rise. Royal Soc. New Zealand Bull., 35, 345-350.

45.
Rebesco, M., R.D. Larter, A. Camelenghi, and P.F. Barker. 1996. Giant sediment drifts on the continental rise west of the Antarctic Peninsula. Geo-Mar. Lett., 16, 65-75. crossref(new window)

46.
Reed, D.L., A.W. Meyer, E.A. Silver, and H. Prasetyo. 1987. Contourite sedimentation in an intraoceanic forearc system: eastern Sunda Arc, Indonesia. Mar. Geol., 76, 223-242. crossref(new window)

47.
Shevenell, A.E., E.W. Domack, and G.M. Kernan. 1996. Record of Holocene palaeoclimate changes along the Antarctic Peninsula: evidence from glacial marine sediments, Lallemand Fjord. p. 55-64. In: Climate Succession and Glacial History over the Past Five Million Years. ed. by M.R. Banks and M.J. Brown. Roy. Doc. Tasmania, 130.

48.
Sievers, H.A. and W.D. Nowlin. 1984. The stratification and water masses in Drake Passage. J. Geophys. Res., 83, 3010-3022. crossref(new window)

49.
Wynn, R.B. and D.A.W. Stow. 2002. Classification and characterisation of deep-water sediment waves. Mar. Geol., 192, 7-22. crossref(new window)

50.
Yoon, H.I. 1995. Glaciomarine Sedimentation Patterns of Bransfield Strait and Adjoining Fjords in South Shetland Islands, Antarctica: Implications for Late Quaternary Glacial History. Ph.D. thesis, Inha University, Incheon, Korea, 273 p.

51.
Yoon, H.I., B.K. Park, Y. Kim, and D. Kim. 2000. Glaciomarine sedimentation and its paleoceanographic implications along the fjord margins in the South Shetland Islands, Antarctic during the last 6000 years. Paleogeogr., Paleoclimatol., Paleoceanogr., 157, 189- 211. crossref(new window)

52.
Zaragosi, S., G.A. Auffret, J.C. Faugeres, T. Garlan, C. Pujol, and E. Cortijo. 2000. Physiography and recent sediment distribution of the Celtic Deep-sea Fan, Bay of Biscay. Mar. Geol., 169, 207-237. crossref(new window)