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Minerals Report - International Seabed Authority

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Figure. 4: Distributions of hydrothermal activity detected along the central Mid-Atlantic<br />

Ridge (15°N-30°N) superimposed upon the pseudo-bathymetry derived from satellite<br />

altimetry by Sandwell & Smith [29].<br />

By contrast, a survey of the 600km of the Reykjanes Ridge south of the<br />

Iceland hot spot revealed evidence for only one hydrothermal system<br />

(German et al., 1994) despite the increased magmatic budget that occurs as the<br />

Mid-Atlantic Ridge and this underlying mantle plume coincide (Figure 5).<br />

INTERNATIONAL SEABED AUTHORITY 382

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