Sedimentary fill of the Chile Trench (32–46°S): volumetric distribution and causal factors

  title={Sedimentary fill of the Chile Trench (32–46°S): volumetric distribution and causal factors},
  author={David V{\"o}lker and Jacob Geersen and Eduardo Contreras‐Reyes and Christian Reichert},
  journal={Journal of the Geological Society},
  pages={723 - 736}
The Chile Trench of the convergent continental margin of Central Chile is a sediment-filled basin that stretches over 1500 km in a north–south direction. The sediment fill reflects latitudinal variations in climate as well as in the morphology and geology of Chile, but also of sediment transport processes to the trench and within the trench. We try to untangle these signals by calculating the total volume and the latitudinal volume distribution of trench sediments and by relating this… 

Figures and Tables from this paper

Structure and Tectonics of the Chilean Convergent Margin from Wide-Angle Seismic Studies: A Review

Based on a compilation of published 2-D velocity-depth models along the Chilean margin (22°–48° S), I review the structure and tectonic processes that govern this convergent margin in terms of

Southward expanding plate coupling due to variation in sediment subduction as a cause of Andean growth

It is found that the thickness of trench-fill sediments, a proxy of plate coupling (with less sediments causing stronger coupling), exerts an important influence on the pattern of crustal shortening along the Andes, demonstrating the importance of climate-tectonic interaction on mountain building.

Reestablishment of an accretionary prism after the subduction of a spreading ridge—constraints by a geometric model for the Golfo de Penas, Chile

Seismic studies offshore southern Chile have revealed the presence of a 70–80 km wide accretionary prism seaward of the Golfo de Penas (GPAP), where the Chile Ridge collided with the South American

Basal Accretion Along the South Central Chilean Margin and Its Relationship to Great Earthquakes

The south central Chilean margin regularly produces many of the world's largest earthquakes and tsunami, including the 2010 Mw 8.8 Maule and 1960 Mw 9.5 Valdivia events. In 2017, we acquired seismic

Water input and water release from the subducting Nazca Plate along southern Central Chile (33°S–46°S)

The age of the subducting Nazca Plate off Chile increases northward from 0 Ma at the Chile Triple Junction (46°S) to 37 Ma at the latitude of Valparaíso (32°S). Age‐related variations in the thermal

Structural constraints on the subduction of mass-transport deposits in convergent margins

Abstract The subduction of large and heterogeneous mass-transport deposits (MTDs) is discussed to modify the structure and physical state of the plate boundary and therewith exert an influence on



Cyclicity of Peru‐Chile trench sediments between 36° and 38°S: A footprint of paleoclimatic variations?

At active continental margins, the subduction of lithospherical plates often leads to trench building; such is the case where the oceanic Nazca Plate meets the continental South American Plate. As

Sedimentation in the Chile Trench: Depositional morphologies, lithofacies, and stratigraphy

The depositional bodies of the Chile Trench (trench fans, the axial channel, sheeted basins, ponded basins, and axial sediment lobes) control the spatial distribution of modem lithofacies in the

Lithospheric flexure modelling seaward of the Chile trench: implications for oceanic plate weakening in the Trench Outer Rise region

SUMMARY The Chilean subduction zone presents a unique opportunity to study trench outer rise deformation of the subducting oceanic lithosphere at different thermal ages. The shape of the outer rise

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Abstract: Sedimentology, petrography and the provenance of Holocene sediments from the Southern Chile Trench (36–47°S) were investigated in an integrated approach combining description of a

Terrigenous sediment supply along the Chilean continental margin: modern regional patterns of texture and composition

Abstract The regional patterns of texture and composition of modern continental slope and pelagic sediments off Chile between 25°S and 43°S reflect the latitudinal segmentation of geological,

Deep lithospheric structures along the southern central Chile margin from wide-angle P-wave modelling

P>Crustal- and upper-mantle structures of the subduction zone in south central Chile, between 42 degrees S and 46 degrees S, are determined from seismic wide-angle reflection and refraction data,

Inversion of forearc basins in south-central Chile caused by rapid glacial age trench fill

This study examines the response of a forearc to the increase in sediment flux to the trench caused by the onset of glacial denudation in the Patagonian Andes. We investigated shelf-coastal basins in

Submarine-fan development in the southern Chile Trench: A dynamic interplay of tectonics and sedimentation

Submarine fans are well developed in the southern Chile Trench, from 33°S to 41°S latitude. SeaMARC-II side-scan sonar and seismic reflection records image steep erosional escarpments, as much as 400