Current Science

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Suspended matter from hydrothermal plume at 3°40'N Carlsberg Ridge was studied for microtexture and geochemistry. Characteristics of these plume particles were compared with deep-oceanic particulates from different depths. Compared to fine, deep-oceanic suspended matter (≤2.0 μm), some particles in the plume were larger (≥20 μm) and had irregular shape and surface. These plume particles were mostly composed of Fe-oxides and silicates. Bulk composition showed that plume particles were relatively enriched with Fe, P, Mn, rare earth elements (except Ce) and U, but had other trace element concentration analogous to that found in deep-oceanic suspended matter. Efficient scavenging of elements from hydrothermal fluid and sea water makes geochemistry of plume particulates different from common oceanic particles.

Keywords

Deep-Oceanic Particulates, Geochemistry, Hydrothermal Plume, Micro-Texture, Suspended Particulate Matter.
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