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Related Experiment Video

Updated: May 5, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
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Global systematics of arc volcano position.

Philip C England1, Richard F Katz

  • 1Department of Earth Sciences, Parks Road, Oxford OX1 3PR, UK. philip.england@earth.ox.ac.uk

Nature
|December 15, 2010
PubMed
Summary

Volcanic arc locations above subduction zones are not explained by chlorite stability limits. Numerical model errors and spurious correlations invalidate previous conclusions on mantle melting processes.

Area of Science:

  • Geophysics
  • Petrology
  • Tectonics

Background:

  • Volcanic arc locations above subduction zones are traditionally linked to mantle melting processes driven by hydrous fluid release from the subducting slab.
  • Previous studies proposed that arc volcanism is controlled by mantle melting within specific temperature and mineral stability windows, particularly chlorite stability.

Discussion:

  • This study refutes the conclusion by Grove et al. regarding the control of volcanic arc location by chlorite stability.
  • Inadequacies in the spatial resolution of numerical models used by Grove et al. led to erroneous arc location calculations.
  • The observed agreement between predicted and actual arc locations in the previous study was attributed to a spurious correlation with slab dip, not mantle melting processes.

Key Insights:

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  • The depth of the subducting slab beneath volcanic arcs is not adequately explained by the limits of chlorite stability.
  • Numerical modeling of subduction zone processes requires higher spatial resolution to accurately predict volcanic arc locations.
  • The relationship between slab dip and arc location in previous models was coincidental rather than causal.

    • Outlook:

    • Further research should focus on refining numerical models to better represent the complex thermal and compositional dynamics of subduction zones.
    • Investigating alternative mechanisms, beyond chlorite stability, is crucial for understanding the global distribution of volcanic arcs.
    • Accurate modeling of mantle melting and fluid migration is essential for predicting volcanic activity and associated geological hazards.