Bathymetry of the Tonga Trench and Forearc: a map series

  title={Bathymetry of the Tonga Trench and Forearc: a map series},
  author={Dawn J. Wright and Sherman H. Bloomer and Christopher J. MacLeod and Brian Taylor and Andrew M. Goodlife},
  journal={Marine Geophysical Researches},
Four new bathymetric maps of the Tonga Trench and forearc between 14 °S and 27 °S display the important morphologic and structural features of this dynamic convergent margin. The maps document a number of important geologic features of the margin. Major normal faults and fault lineaments on the Tonga platform can be traced along and across the upper trench slope. Numerous submarine canyons incised in the landward slope of the trench mark the pathways of sediment transport from the platform to… 
Structural variability of the Tonga-Kermadec forearc characterized using robustly constrained geophysical data
Subducting bathymetric anomalies enhance erosion of the overriding forearc crust. The deformation associated with this process is superimposed on pre-existing variable crustal and sedimentary
Construction and subduction of the Louisville Ridge, SW Pacific—insights from wide-angle seismic data modelling
The Louisville Ridge is a ca. 4000 km-long chain of seamounts in the SW Pacific that is currently being subducted at the Tonga-Kermadec trench. The Pacific Plate, on which the chain sits, is
Seismic velocity structure and deformation due to the collision of the Louisville Ridge with the Tonga-Kermadec Trench
New marine geophysical data recorded across the Tonga-Kermadec subduction zone are used to image deformation and seismic velocity structures of the forearc and Pacific Plate where the Louisville
Tectonic erosion of the Peruvian forearc, Lima Basin, by subduction and Nazca Ridge collision
Subsidence of Lima Basin, part of the Peruvian forearc, is controlled by tectonic erosion by the subducting Nazca plate. Multichannel seismic reflection data coupled with age and paleowater depth
The Central Pacific Megatrend
The WNW-ESE-trending Central Pacific Megatrend is a transbasinal feature comprising several types of geornorphic features—ridges, linear seamount chains, and fractures. First appearing on the
Different styles of deformation of the fore-arc wedge along the Chilean convergent margin: Insights from 3D numerical experiments
(TYPE=abstract)The styles of deformation of the fore-arc wedges along the Chilean convergent margin are observed to vary significantly, despite similar plate kinematic conditions. Here, I focus on
Diffuse Extension of the Southern Mariana Margin
Extension within the southern Mariana margin occurs both normal to and parallel to the trench. Trench‐normal extension takes place along focused and broad backarc spreading axes forming crust that is


Tectonic controls on sedimentation and diagenesis in the Tonga Trench and forearc, southwest Pacific
Sedimentation in the Tonga forearc is dominated by the redeposition of volcaniclastic sediment from the arc volcanic front by mass flows and turbidity currents onto the adjacent Tonga Platform, the
A multibeam reconnaissance of the Tonga Trench axis and its intersection with the Louisville guyot chain
A Seabeam reconnaissance of 1200 km of the deep sediment-starved axis of Tonga Trench delineated the fine-scale relief at the outcrop of a subduction zone generally characterized by tectonic erosion
Slow rates of subduction erosion estimated from subsidence and tilting of the Tonga forearc
The convergent margins of the western Pacific are marked by widespread tectonic erosion of the overriding plate by the subducting oceanic lithosphere. At Ocean Drilling Program Site 841 on the
Origin of the Louisville ridge and its relationship to the Eltanin Fracture Zone System
We have combined shipboard and Seasat altimeter derived data in an intergrated geological and geophysical study of the Louisville Ridge; a 3500-km-long seamount chain extending from the Tonga trench
Tectonic Processes and the History of the Mariana Arc: A Synthesis of the Results of Deep Sea Drilli
DSDP Leg 60 drilled 10 sites on an east-west transect at 18°N across the tectonically active trench, volcanic arc, and extensional back-arc basin on the Mariana arc system. The analysis of these
Subduction of a Late Cretaceous Seamount of the Louisville Ridge at the Tonga Trench: A model of normal and accelerated tectonic erosion
The hotspot-generated Louisville Ridge is a 4000-km chain of seamounts (typically 2–2.5 km high and 10–40 km in diameter) and an underlying crustal swell (1.5 km high and 100+ km wide) trending NNW
Ocean Drilling Program Site 841 is located on the outer slope of the Tonga forearc, midway between the crest of the forearc platform and the axis of the Tonga Trench. Drilling revealed a mid Eocene
Geodetic observations of very rapid convergence and back-arc extension at the Tonga arc
THE Earth's most active zone of mantle seismicity arises from the subduction of the Pacific plate at the Tonga trench1. It is not known why this slab generates so many more earthquakes than other