Deep cleft in the floor of the south Tasman Sea south of New Zealand's South Island
The Puysegur Trench and Macquarie Ridge are marked by the line extending south from the southwestern South Island.
The 6,300-metre (20,700 ft) deep[1]Puysegur Trench is a deep cleft in the floor of the south Tasman Sea formed by the subduction of the Indo-Australian Plate under the Pacific Plate to the south of New Zealand. Immediately to its east lies the Puysegur Ridge, a northern extension of the Macquarie Ridge, which separates the Puysegur Trench from the Solander Trough. To the west is the expanse of the Tasman Basin, which stretches most of the distance to Australia. To the north of the trench lies the Fiordland Basin, which can be considered an extension of the trench. The Puysegur Trench mirrors the Kermadec Trench and Tonga Trench north of New Zealand.
Map of Puysegur Trench (blue) and its active ocean floor tectonic relationships. The immediate adjacent to the south McDougall Fault Zone (red shading) and approximate Macquarie Ridge line (yellow) are shown. The arc Solander volcanic edifice (brown) and the Resolution Ridge (black line) are shown. The Macquarie Ridge associated basins (northwest portion of South East Tasman Basin, Solander Trough & Emerald Basin) are shown in light purple shading as this delimits most of the historic cross faulting and other fault zones closely related to the historic sea floor spreading centre of the Macquarie Ridge (click on map to enable mouse over, a purple dot shown then is the location of the Macquarie Triple Junction far to the south).
The Puysegur Trench stretches for over 800 kilometres south from the southwesternmost point of the South Island's coast, its southernmost extent being 400 kilometres due west of the Auckland Islands. It is named after Puysegur Point.
^Stern, Robert J. (2004). Subduction initiation: spontaneous and induced, Earth and Planetary Science Letters 226, 275–292. doi:10.1016/j.epsl.2004.08.007.
The 6,300-metre (20,700 ft) deep PuysegurTrench is a deep cleft in the floor of the south Tasman Sea formed by the subduction of the Indo-Australian...
Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 mi) wide and...
The PuysegurTrench, which includes the Fjord Trench, is the southern region of the boundary closest to the Macquarie Triple Junction. The Puysegur Trench...
The Hikurangi Trench, also called the Hikurangi Trough, is an oceanic trench in the bed of the Pacific Ocean off the east coast of the North Island of...
beginning to subduct under the Pacific Plate along the PuysegurTrench. Extending southwest of this trench is the Macquarie Ridge. The southerly side is a divergent...
other, producing the PuysegurTrench to the south, the Hikurangi Trench east of the North Island, and the Kermadec and Tonga Trenches further north. New...
crust. These two features are separated by the Alpine Fault and Kermadec Trench and by the wedge-shaped Hikurangi Plateau, and they are moving separately...
12 km 40.80°S 176.00°E Felt throughout North Island 3 November 1918 PuysegurTrench South of New Zealand 6.8 50 km 47.00°S 165.40°E Felt throughout Southland...
complex is an extension of New Zealand's Alpine Fault which becomes the PuysegurTrench and ridge to its east. New Zealand is continental crust and the northern...
Indo-Australian Plate subducts under the Pacific Plate forming the PuysegurTrench. The southern part of Zealandia, which is to the east of this boundary...
Plate at the PuysegurTrench. The South American Plate is subducting under the South Sandwich Plate, forming the South Sandwich Trench. The oceanic Australian...
Plate is a long and narrow tectonic plate located west of the Kermadec Trench in the south Pacific Ocean. Also included on this tectonic plate is a small...
with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone. Abyssal plains cover more than 33% of the ocean floor...
Indo-Australian Plate boundary forms the Macquarie Fault Zone in the PuysegurTrench off the southwestern corner of the South Island and comes onshore as...
subduction of the Australian Plate beneath the Pacific Plate along the PuysegurTrench, which extends southwards from the end of the Alpine Fault. The current...
north and south. To the northeast, the Hikurangi Trench, an extension of the much deeper Kermadec Trench, drops to below 3,000 m (9,800 ft) close to the...
Australian Plate. Immediately to the south of the South Island is the PuysegurTrench, where the Australian Plate is subducting obliquely under the Pacific...
of South America Philippine Trench – A submarine trench to the east of the Philippines in the Pacific Ocean PuysegurTrench – A deep cleft in the floor...
opening from the still active eastern arc segments close to the Pacific trench and slab. The 400 km (250 mi) long Cook Fracture Zone that is aligned with...
the Australian Plate subducts under the Pacific Plate forming the PuysegurTrench. This configuration has led to volcanism and extension in the North...
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