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Award Abstract #0841074

Collaborative Research: Mantle Serpentinization and Water Cycling Through the Mariana Trench and Forearc

NSF Org: OCE
Division Of Ocean Sciences
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Initial Amendment Date: January 21, 2010
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Latest Amendment Date: October 19, 2015
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Award Number: 0841074
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Award Instrument: Continuing Grant
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Program Manager: Candace Major
OCE Division Of Ocean Sciences
GEO Directorate For Geosciences
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Start Date: February 1, 2010
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End Date: January 31, 2017 (Estimated)
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Awarded Amount to Date: $413,112.00
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Investigator(s): Douglas Wiens doug@wustl.edu (Principal Investigator)
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Sponsor: Washington University
CAMPUS BOX 1054
Saint Louis, MO 63130-4862 (314)747-4134
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NSF Program(s): Marine Geology and Geophysics,
GeoPRISMS
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Program Reference Code(s): 0000, OTHR
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Program Element Code(s): 1620, 8076

ABSTRACT

This project will utilize active- and passive source seismic techniques, using short period and broad band OBSs, respectively, in the Mariana forearc, trench, and outer rise, in order to image the distribution of upper mantle serpentinization. This study will address a central question regarding the importance of serpentinite for understanding subduction zones. The research will quantify the flux of water subducted by upper-mantle serpentinite, and explore the relationships between serpentinization and seismicity in the outer forearc and outer rise.

Broader Impacts: This study has much relevance to arc magnatism and will help quantify the hydration state of the earth's mantle, thus addressing a primary goal of the Subduction Factory initiative of the MARGINS program. The project provides educational support for several graduate and undergraduate students.


PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Embley, R.W., Y. Tamura, S.G. Merle, T. Sato, O. Ishizuka, W.W. Chadwick Jr., D.A. Wiens, P. Shore, and R.J. Stern. "Eruption of South Sarigan Seamount, Northern Mariana Islands: Insights into Hazards from Submarine Volcanic Eruptions," Oceanography, v.27, 2014, p. 24. 

Erica L. Emry, Douglas A. Wiens, and Daniel Garcia-Castellanos. "Faulting within the Pacific Plate at the Mariana Trench: Implications for plate interface coupling and subduction of hydrous minerals," Journal of Geophysical Research, v.119, 2014, p. 3076. 

BOOKS/ONE TIME PROCEEDING

Erica L Emry. "Shallow Thrust and Outer Rise Earthquakes in Northwestern Pacific Subduction Zones and their Role in Subduction Zone Water Budgets with Special Focus on the Mariana Islands", 02/01/2012-01/31/2013,  2012, "PhD Thesis, Washington University in Saint Louis, Saint Louis, MO, 251 pp.".

 

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