Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Effect of Sediment-Water Interface 'Boundary Layer' on Exposure of Nodules and Their Abundance: A Study from Seabed Photos


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1 National Institute of Oceanography Dona Pauia, Goa 403 004, India
     

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The results obtained from seabed photos and boomerang grab samples reveal a striking similarity in distribution patterns of size classes of polymetallic nodules. Due to partial sediment cover, there is a 'fractionation' effect on nodules, which affects nodule abundance estimates based on photos. A model showing variable burial (or exposure) depending upon the thickness of the Sediment-Water Interface Boundary (SWIB) layer is presented. Standard relationships can be established between nodule burial and SWIB thickness.
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  • Effect of Sediment-Water Interface 'Boundary Layer' on Exposure of Nodules and Their Abundance: A Study from Seabed Photos

Abstract Views: 195  |  PDF Views: 2

Authors

Rahul Sharma
National Institute of Oceanography Dona Pauia, Goa 403 004, India

Abstract


The results obtained from seabed photos and boomerang grab samples reveal a striking similarity in distribution patterns of size classes of polymetallic nodules. Due to partial sediment cover, there is a 'fractionation' effect on nodules, which affects nodule abundance estimates based on photos. A model showing variable burial (or exposure) depending upon the thickness of the Sediment-Water Interface Boundary (SWIB) layer is presented. Standard relationships can be established between nodule burial and SWIB thickness.