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An evaluation of factors influencing pore pressure in accretionary complexes: Implications for taper angle and wedge mechanics

Dates

Year
2006

Citation

Saffer, Demian M, and Bekins, Barbara A, 2006, An evaluation of factors influencing pore pressure in accretionary complexes: Implications for taper angle and wedge mechanics: Journal of Geophysical Research, v. 111, iss. B4.

Summary

At many subduction zones, accretionary complexes form as sediment is off-scraped from the subducting plate. Mechanical models that treat accretionary complexes as critically tapered wedges of sediment demonstrate that pore pressure controls their taper angle by modifying basal and internal shear strength. Here, we combine a numerical model of groundwater flow with critical taper theory to quantify the effects of sediment and décollement permeability, sediment thickness, sediment partitioning between accretion and underthrusting, and plate convergence rate on steady state pore pressure. Our results show that pore pressure in accretionary wedges can be viewed as a dynamically maintained response to factors which drive pore pressure (source [...]

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  • USGS National Research Program

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Added to ScienceBase on Fri Apr 19 11:15:14 MDT 2013 by processing file <b>Multiphase Flow, Transport, Reaction, and Biodegradation.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/51117dcfe4b03611765639d6">https://www.sciencebase.gov/catalog/item/51117dcfe4b03611765639d6</a>

Additional Information

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Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.1029/2005JB003990

Citation Extension

citationTypeJournal Article
journalJournal of Geophysical Research
parts
typeVolume
value111
typeIssue
valueB4

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