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Characterizing Geomorphological Properties of Western Pacific Seamounts for Cobalt-rich Ferromanganese Crust Resource Assessment
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  • Journal title : Economic and Environmental Geology
  • Volume 49, Issue 2,  2016, pp.121-134
  • Publisher : The Korean Society of Economic and Environmental Geology
  • DOI : 10.9719/EEG.2016.49.2.121
 Title & Authors
Characterizing Geomorphological Properties of Western Pacific Seamounts for Cobalt-rich Ferromanganese Crust Resource Assessment
Joo, Jongmin; Kim, Jonguk; Ko, Youngtak; Kim, Seung-Sep; Son, Juwon; Pak, Sang Joon; Ham, Dong-Jin; Son, Seung Kyu;
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 Abstract
We characterize the spatial distribution of Cobalt-rich ferromanganese crusts covering the summit and slopes of a seamount in the western Pacific, using acoustic backscatter from multibeam echo sounders (MBES) and seafloor video observation. Based on multibeam bathymetric data, we identify that ~70% of the summit area of this flattopped seamount has slope gradients less than . The histogram of the backscatter intensity data shows a bi-modal distribution, indicating significant variations in seabed hardness. On the one hand, visual inspection of the seafloor using deep-sea camera data exhibits that the steep slope areas with high backscatter are mainly covered by manganese crusts. On the other hand, the visual analyses for the summit reveal that the summit areas with relatively low backscatter are covered by sediments. The other summit areas, however, exhibit high acoustic reflectivity due to coexistence of manganese crusts and sediments. Comparison between seafloor video images and acoustic backscatter intensity suggests that the central summit has relatively flat topography and low backscatter intensity resulting from unconsolidated sediments. In addition, the rim of the summit and the slopes are of high acoustic reflectivity because of manganese crusts and/or bedrock outcrops with little sediments. Therefore, we find a strong correlation between the acoustic backscatter data acquired from sea-surface multibeam survey and the spatial distribution of sediments and manganese crusts. We propose that analyzing acoustic backscatter can be one of practical methods to select optimal minable areas of the ferromanganese crusts from seamounts for future mining.
 Keywords
ferromanganese crust;seamount;acoustic survey;acoustic backscatter;seafloor video observation;
 Language
Korean
 Cited by
1.
An integrated method for the quantitative evaluation of mineral resources of cobalt-rich crusts on seamounts, Ore Geology Reviews, 2017, 84, 174  crossref(new windwow)
 References
1.
APL-UW (1997) High Frequency Ocean Environmental Acoustic Models Handbook, Technical Report APL-UW TR-9407, Applied Physics Laboratory, University of Washington, Seattle, p.21-49.

2.
Blondel, P. and Murtion, B.J. (2009) The handbook of sidescan sonar, Springer Verlag, p.15-18.

3.
Beyer, A., Charkraboty, B. and Schenke, H.W. (2007) Seafloor classification of the mound and channel provinces of the Porcupine Seabight: and application of the multibeam angular backscatter data, Int J Earth Sci (Geol Rundsch). v.96, p.11-20. crossref(new window)

4.
Caress, D.W. and Chayes, D.N. (1995) New software for processing sidescan data from sidescan-capable multibeam sonars. In: Proceedings of the OCEANS 95 MTS/ IEEE Conference on Challenges of our Changing Global Environment, San Diego, CA. p.997-1000.

5.
Fonseca, L. and Calder, B. (2005) Geocoder: an efficient backscatter map constructor. Proceedings of the U.S. Hydrographic Conference 2005, San Diego, p.1-9

6.
Fonsenca, L. and Mayer, L. (2007) Remote estimation of surficial seafloor properties through the application Angular Range Analysis to multibeam sonar data, Mar Geophys Res., v.28, p.119-126. crossref(new window)

7.
Fonseca, L., Brown, C., Calder, B.R., Mayer, L.A. and Rzhanov, Y. (2009) Angular range analysis of acoustic themes from Stanton Banks, Ireland: a link between visual interpretation and multibeam echosounder angular signatures. Applied Acoustics, v.70, p.1298-1304. crossref(new window)

8.
Fox, C.G. and Hayes, D.E (1985) Quantitative methods for analyzing the roughness of the seafloor, Rev. Geophys., v.23, n.1, p.1-48 crossref(new window)

9.
Glasby, G.P., Ren, R., Ahi, X. and Pulyaeva, I.A. (2007) Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time. Geo-Marine Letters, v.27, p.315-323. crossref(new window)

10.
Heap, A.D., Hughes, M.G., Anderson, T., Nichol, S.L. and Daniell, J.J. (2009) Seabed Environments and Subsurface Geology of the Capel-Faust Basins and Gifford Guyot, Eastern Australia - TAN0713 Post-survey Report. Record 2009/022. Geoscience Australia, Canberra, p.16-21.

11.
Hein, J.R., Koschinsky, A., Halbach, P., Manheim, F.T., Bau, M., Kang, J.-K. and Lubik, N. (1997) Iron and manganese oxide mineralization in the Pacific. In Nicholson, K. et al. (eds.) Manganese Mineralization: Geochemistry and Mineralogy of Terrestrial and Marine Deposits. Geological Society Special Publication 119, London, p.123-138.

12.
Hein, J.R., Koschinsky, A., Bau, M., Manheim, F.T., Kang, J.-K. and Roberts, L. (2000) Cobalt-rich ferromanganese crusts in the Pacific. In Cronan, D.S. (ed.) Handbook of Marine Mineral Deposits. CRC Press, Boca Raton, p.239-279.

13.
Hein, J.R., Conrad, T.A. and Dunham, R.E. (2009) Seamount characteristics and mine-site model applied to exploration- and mining-lease-block selection for cobalt-rich ferromanganese crusts. Mar. Georesour. Geotechnol. v.27, p.160-176. crossref(new window)

14.
Hein, J.R., Mizell, K., Koschinsky, A. and Conrad, T.A. (2013) Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based resources. Ore Geology Reviews, v.51, p.1-14. crossref(new window)

15.
Kim, J., Ko, Y.T., Hyeong, K. and Moon, J.W. (2013) Geophysical and Geologcial Exploration of cobalt-rich Ferromanganese Crusts on a Seamount in the Western Pacific. Econ. Environ. Geol., v.46, n.6, p.569-580. crossref(new window)

16.
MOMAF (2005) A report on 2005 deep seabed mineral resources exploration, MOMAF, v.5, p.3-42.

17.
Kojima, K. (1999) Report on the cobalt-rich manganese crust resources in the waters of the republic of the marshall islands: based on the results of the cooperation study project on the deepsea mineral resources in selected offshore areas of the SOPAC region. SOPAC technical report 293, p.4-7.

18.
Lee, G.C., Ko. Y., Yoo, C.M., Chi, S.B., Kim. J. and Ham, D.J (2005) Review on underwater positioning for deep towing vehicles, ocean and poloar Research, v.27, n.3, p.335-339. crossref(new window)

19.
Lee, T.G., Lee, K.H., Hein, J.R. and Moon, J.W. (2009) Geophyiscal investigation of seamounts near the Ogasawara Fracture Zone, western Pacific, Earth Planets Space, v.61, p.319-331. crossref(new window)

20.
Linconln, J.M, Pringle, M.S. and Silva, I.P. (1993) Early and Late Cretaceous Volcanism and Reef-Building in the Marshall Islands. In : Pringle, M.S., Sager, W.W., Silter, W.V and Stein, S. (eds), The Mesozoic Pacific: Geology, Tectonics, and Volcanism. Geophical Mogograph, 77, American Geophysical Union, Washington, D.C., p.279-305.

21.
Park, Y., Lee, S., Seo, W.J., Gong, G.S., Han, H. and Park, S. (2008) Surfical sediment classification using Backscattered Amplitude Imagery of Multibeam Echo sounder(300 kHz), Econ. Environ. Geol., v.41, n.6, p.747-761.

22.
Roberts, J.M., Brown, C.J., Long, D.C. and Bates, R. (2005) Acoustic mapping using a multibeam echosounder reveals cold-water coral reefs and surrounding habitats, Coral Reef, v.24, p.654-669. crossref(new window)

23.
Ryan, W.B.F., Carbotte, S.M., Coplan, J.O., O'Hara, S., Melkonian, A., Arko, R., Weissel, R.A., Ferrini, V., Goodwillie, A., Nitsche, F., Bonczkowski, J. and Zemsky, R. (2009) Global Multi-Resolution Topography synthesis, Geochem. Geophys. Geosyst., v.10, Q03014, doi: 10.1029/2008GC002332 crossref(new window)

24.
Stewart, W.K., Chu, D., Malik, S., Lerner, S. and Singh, H. (1994) Quantitative seafloor characterization using a bathymetric sidescan sonar, IEEE. Jour. Oceanic Eng., v.19, n.4, p.599-610. crossref(new window)

25.
Thornton, B., Asada, A., Bodernmann, A., Sangekar, M., Ura, T. (2013) Instruments and Methods for Acoustic and Visual survey of manganese cursts, IEEE J. Oceanic Eng., v.38, p.186-203. crossref(new window)

26.
Usui, A. and Okamoto, N. (2010) Geophysical and geological exploration of Cobalt-rich ferromanganese crusts: An attempt of small-scale mapping on a Micronesian seamount. Marine Georesources and Geotechnology, v.28, p.192-206. crossref(new window)