Cited by 35Geological and Geochemical AnalysisGeological and Geophysical StudiesGeological and Geophysical Studies Worldwide

Subduction zone recycling processes and the rock record of crustal suture zonesThis article is one of a series of papers published in this Special Issue on the theme Lithoprobe — parameters, processes, and the evolution of a continent.

Scholl, David W., von Huene, Roland·2010·Canadian Journal of Earth Sciences

Abstract

Offshore observations at modern ocean-margin subduction zones (OMSZs) reveal that bodies of accreted material are commonly volumetrically small or missing, that crustal thinning and subsidence (3–5 km) has occurred, and that most trench axes lie close (5–30 km) to the seaward tapering edge of coastal basement rock. Onshore mapping commonly documents missing or only narrow terranes of former forearc rock and the inboard migration of the arc magmatic front. These observations are evidence that subduction is accompanied by the removal of sediment and crustal material from the submerged forearc by the kindred tectonic processes, respectively, of sediment subduction and subduction erosion. Subduction erosion truncates the margin (migrates the trench inboard) at ∼2.5 km/Ma. Onshore observations at ancient crust-suturing subduction zones (CSSZs) imply that collisional suturing is accompanied by sediment subduction and truncation of both upper and lower plates. During a protracted period of suturing (20–50 million years), a 100–200 km wide (or wider) band of the seaward edge of each plate can be removed subductively. Truncation of the upper plate is effected by subduction erosion, and that of the lower plate by the necking and break-off of its subducted edge. The average linear rate of crustal loss for each plate is estimated at ∼1.5 km/Ma, or ∼3 km/Ma combined. Because significant crustal loss occurs before and during tectonic fusing of colliding crustal blocks, structures and rock bodies that might be expected to record a former OMSZ and the formation of a CSSZ may be absent, unimpressively small, or preserved only as exhumed masses of once deeply subducted material.

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Crossref · 10.1139/e09-061

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  • Accretionary orogens are major sites of both crust formation through lateral growth and destruction through tectonic erosion caused by the downgoing oceanic lithosphere.

    “Accretionary orogens are major sites of both crust formation through lateral growth as well as destruction through tectonic erosion caused by the downgoing oceanic lithosphere (Scholl and von Huene, 2010).”

    From Secular change and the onset of plate tectonics on Earth (2020) · cites this paper as Scholl and von Huene, 2010

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Authors
Scholl, D. W., & von Huene, R.
Affiliations
  • University of Alaska Fairbanks (US)
  • Department of Geology and Geophysics, University of Alaska, Fairbanks, AK 99775-5780, USA.
Venue
Canadian Journal of Earth Sciences
Published
2010-05
Volume
47
Issue
5
Pages
633-654
ISSN
  • 0008-4077 (ISSN-L)
  • 1480-3313
OpenAlex
W1970722600
Cited by
35
References
181
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2021: 3 · 2020: 4 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 5 · 2014: 5 · 2013: 1 · 2012: 3
Type
journal article
Language
en
Open access
closed
Locations
Canadian Journal of Earth Sciences (publishedVersion)
Funders
Országos Meteorológiai Szolgálat
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Geology › Geological and Geophysical Studies
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geophysical Studies Worldwide
Keywords
subduction zone, sediment subduction, subduction erosion, crustal thinning, forearc, trench migration, continental collision, accretionary prism, exhumation, continental margin evolution

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