Distribution of contourite drifts on convergent margins: Examples from the Hikurangi subduction margin of New Zealand

Contourite drift systems form a significant component of the marine clastic sedimentary record. Although contourites form in all tectonic settings, few studies have described their development along convergent margins; such characterization is needed to underpin oceanographic and palaeoenvironmental...

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Bibliographic Details
Published in:Sedimentology 2021-01, Vol.68 (1), p.294-323
Main Authors: Bailey, William S., McArthur, Adam D., McCaffrey, William D., Pontén, Anna
Format: Article
Language:English
Subjects:
Abyssal zone
Active margins
Bottom currents
Contourites
Convergence
Deep‐water
Drift
Hikurangi
Neogene
New Zealand
Ocean currents
Ocean floor
Oceanic trenches
Passive margins
Sand waves
Sedimentary structures
Slope gradients
Subduction
Subduction (geology)
Tectonics
Water wells
Well data
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Summary:Contourite drift systems form a significant component of the marine clastic sedimentary record. Although contourites form in all tectonic settings, few studies have described their development along convergent margins; such characterization is needed to underpin oceanographic and palaeoenvironmental studies in active settings. This study is the first to document contourite drift development along the Hikurangi subduction margin of New Zealand. Integration of bathymetric, seismic and well data enables five classes of drift to be recognized around the subduction wedge, occurring in three principal associations: (i) an upper slope drift association of giant elongate mounded (ca 150 km long, 50 km wide and up to 1100 m thick) and plastered drifts (ca 300 km long, 8 km wide and
ISSN:0037-0746
1365-3091
DOI:10.1111/sed.12779