Story: Marine minerals

New Zealand’s legal sea floor

New Zealand’s legal sea floor

Since 1978 New Zealand’s legal claim to the sea floor around its islands has been defined by a line drawn 200 nautical miles (370.4 kilometres) around its islands. But in some places New Zealand’s mostly underwater continent extends well beyond this. Under the United Nations Convention on the Law of the Sea there is a process for countries to apply for an extension of the area of sea floor that they have control over. In New Zealand’s case this applies to areas where the submerged New Zealand continent extends beyond the 200-mile limit. In 2006 New Zealand is likely to propose that its legal sea floor be enlarged (taking in parts of the area marked in brown). Where this extends beyond the 200-mile limit, New Zealand will enjoy rights over mineral resources and organisms (such as sponges and molluscs) on the sea floor, but not fish stocks.

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Source: GNS Science

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How to cite this page:

Ian Wright, 'Marine minerals - Nodules, crusts and vents', Te Ara - the Encyclopedia of New Zealand, (accessed 27 January 2022)

Story by Ian Wright, published 12 Jun 2006