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Minerals Report - International Seabed Authority

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elements associated with the detrital phase usually decrease with increasing<br />

crust thickness (69).<br />

60 90 120 150 180 -150 -120 -90 -60 -30 0<br />

•<br />

Shatsky<br />

Rise<br />

•<br />

•<br />

California<br />

Margin<br />

•<br />

• • •<br />

Mid-Pacific<br />

Mountains<br />

Johnston Is.<br />

Hawaiian Chain<br />

NW of<br />

M.I.<br />

Mariana<br />

Arc<br />

C-C Zone<br />

FSM<br />

Yap-Palau<br />

Arc<br />

Marshall Is.<br />

•<br />

East-central and South-east<br />

Pacific Margin<br />

•<br />

Fiji<br />

•<br />

•<br />

•<br />

Tonga Arc<br />

•<br />

•<br />

•<br />

•<br />

•<br />

••<br />

• •<br />

•<br />

constructive margin<br />

destructive margin<br />

tentative margin<br />

Lined boxes in the Pacific are regions with mean Fe-Mn crust compositional data listed in Table 6; far north Pacific data are from the two<br />

rthest north; the California margin includes the Oregon margin; the far south Pacific data cover areas mostly offshore New Zealand and<br />

ustralia; the south Pacific data span most of the area between South America and the west Pacific arcs and between the equator and<br />

latitude; the crossed hatched oval region is the Clarion-Clipperton prime Fe-Mn nodule zone for comparison; data for all the stations<br />

ntic and Indian Oceans were averaged for each ocean for Table 6.<br />

INTERNATIONAL SEABED AUTHORITY 212

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