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- The North Fiji Basin (NFB) is an oceanic basin west of Fiji in the south-west Pacific Ocean. It is an actively spreading back-arc basin delimited by the Fiji islands to the east, the inactive to the north, the Vanuatu/New Hebrides island arc to the west, and the Hunter fracture zone to the south.Roughly triangular in shape with its apex located at the northern end of the New Hebrides Arc, the basin is actively spreading southward and is characterised by three spreading centres and an oceanic crust younger than 12 Ma. The opening of the NFB began when a slab roll-back was initiated beneath the New Hebrides and the island arc started its clockwise rotation.The opening of the basin was the result of the collision between the Ontong Java Plateau and the Australian Plate along the now inactive Solomon–Vitiaz subduction system north of the NFB.The NFB is the largest and most developed back-arc basin of the south-west Pacific. It is opening in a complex geological setting between two oppositely verging subduction systems, the New Hebrides/Vanuatu and Tonga trenches and hence its ocean floor has the World's largest amount of spreading centres per area. Two opposite-facing systems of deformation partly overlap where the Australian and Pacific plates meet along a section of the andesite line in the south-west Pacific: east of the NFB the Kermadec-Tonga Arc stretches some 3,000 km (1,900 mi) north from New Zealand, and west of the NFB the New Hebrides subduction zone formed during the opening of the NFB back-arc basin. There are three microplates in the NFB: New Hebrides, Balmoral Reef, and Conway Reef. Little was known about the NFB before 1985 and in the 1970s the central part of the basin, the only mapped area, was called the North Fiji Plateau. (en)
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- Opening of the NFB from 12 Ma to present. Grey areas represent now subducted ocean floor. (en)
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- North Fiji Basin 00Ma.jpg (en)
- North Fiji Basin 03Ma.jpg (en)
- North Fiji Basin 06Ma.jpg (en)
- North Fiji Basin 09Ma.jpg (en)
- North Fiji Basin 12Ma.jpg (en)
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- The North Fiji Basin (NFB) is an oceanic basin west of Fiji in the south-west Pacific Ocean. It is an actively spreading back-arc basin delimited by the Fiji islands to the east, the inactive to the north, the Vanuatu/New Hebrides island arc to the west, and the Hunter fracture zone to the south.Roughly triangular in shape with its apex located at the northern end of the New Hebrides Arc, the basin is actively spreading southward and is characterised by three spreading centres and an oceanic crust younger than 12 Ma. The opening of the NFB began when a slab roll-back was initiated beneath the New Hebrides and the island arc started its clockwise rotation.The opening of the basin was the result of the collision between the Ontong Java Plateau and the Australian Plate along the now inactive (en)
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