Award Abstract # 0742368
Collaborative Research: Element Recycling from UHP Metasediments: Evidence and Consequences

NSF Org: OCE
Division Of Ocean Sciences
Recipient: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
Initial Amendment Date: January 22, 2008
Latest Amendment Date: January 22, 2008
Award Number: 0742368
Award Instrument: Standard Grant
Program Manager: Thomas Janecek
OCE  Division Of Ocean Sciences
GEO  Directorate for Geosciences
Start Date: June 1, 2008
End Date: May 31, 2012 (Estimated)
Total Intended Award Amount: $160,590.00
Total Awarded Amount to Date: $160,590.00
Funds Obligated to Date: FY 2008 = $160,590.00
History of Investigator:
  • Peter Kelemen (Principal Investigator)
     peterk@ldeo.columbia.edu
Recipient Sponsored Research Office: Columbia University
 615 W 131ST ST
 NEW YORK
 NY  US  10027-7922
(212)854-6851
Sponsor Congressional District: 13
Primary Place of Performance: Columbia University Lamont Doherty Earth Observatory
 Rt 9W
 Palisades
 NY  US  10964
Primary Place of Performance
Congressional District:		 17
Unique Entity Identifier (UEI): F4N1QNPB95M4
Parent UEI:
NSF Program(s): OCEAN DRILLING PROGRAM
Primary Program Source: 01000809DB NSF RESEARCH & RELATED ACTIVIT
Program Reference Code(s): 0000, OTHR
Program Element Code(s): 572000
Award Agency Code: 4900
Fund Agency Code: 4900
Assistance Listing Number(s): 47.050

ABSTRACT

This is a study of ultrahigh-pressure (UHP) metasediments that have been subducted to >75 km, to quantify element recycling processes during dehydration and/or melt extraction at volcanic arcs. The aim of the research is to understand the fluxes of material into and out of subduction zones and volcanic arcs. In turn, this is fundamental to understanding global geochemistry, and is a central goal of the MARGINS Initiative. This research on UHP metasedimentary samples will collect new data for major- and trace-element and isotope exchange thermometers. Trace elements in selected metasediments will be compared to those in normal fine-grained sedimentary rocks to identify systematic changes associated with melt extraction or dehydration. The results should provide constraints on the budget of key elements in subducting metasediments, and the extraction of these elements via fluid and melt transport into the zone of magma genesis beneath arcs. Broader impacts include training of two graduate students, presentation of results in papers and talks, archiving of data in the SedDB global sedimentary rock data base, and extensive, ongoing outreach efforts via web and informal lectures by the PI's.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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(Showing: 1 - 10 of 35)
Behn, M.D., G. Hirth, P.B. Kelemen and B.R. Hacker "Implications of Sediment Diapirs on the H2O Flux into the Mantle at Arcs" Eos Trans. AGU 90(52) Fall Meet. Suppl. , v.90(52) , 2009 , p.T31D-01 I
Behn, M.D., Hirth, G., and Kelemen, P.B. "Mechanisms for 3-D Flow in the Mantle Wedge at Subduction Zones" Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract , 2007 , p.U14A-01
Brown, S.T., Yogodzinksi, G.M., Vervoort, J.D., and Kelemen, P.B. "Source Components and Mass Transfer in the Aleutian Arc from Hf, Nd and Pb Isotopes" Eos Trans. AGU, 89(53), Fall Meet. Suppl. Abstract , 2008 , p.V33C-2227
Cagnioncle, A., Parmentier, E., Saal, A., and Kelemen, P. "Simple Models of Melting and Trace Element Transport in Subduction Zones" Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract , 2007 , p.V33F-04
DeBari, S., Greene, A., Kelemen, P.B., and Johnsen, M. "Vertical Stratification of Composition, Density, and Inferred Magmatic Processes in Exposed Arc Crustal Sections" Eos Trans. AGU, 89(53), Fall Meet. Suppl. Abstract , 2008 , p.V33A-2195
Dygert, N.J., Y. Liang and P.B. Kelemen "Trace element abundances in pyroxenes from a dunite-harzburgite-lherzolite sequence at the Trinity ophiolite: Evidence for multiple episodes of melt migration and melt-rock reaction" AGU Fall Meeting abstracts , 2011 , p.V31D-2557
Gordon, S M, Luffi, P I, Hacker, B R, Kelemen, P B, Valley, J W, Spicuzza, M, Kozdon, R, Ratschbacher, L "Thermal and trace-element evolution of subducted sediments: insight from Pamir eclogitic and granulitic xenoliths" invited abstract, presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. , 2010 , p.V32A-04
Gordon, S M, Luffi, P I, Hacker, B R, Kelemen, P B, Valley, J W, Spicuzza, M, Kozdon, R, Ratschbacher, L "Thermal and trace-element evolution of subducted sediments: insight from Pamir eclogitic and granulitic xenoliths" invited abstract, presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. , 2010 , p.V32A-04
Gordon, S.M., P. Kelemen, B.R. Hacker, P. Luffi and L. Ratschbacher "Partial melting and its role in elemental recycling: Insight from Pamir metasedimentary xenoliths" Min. Mag. Goldschmidt Conference Abstracts , 2011 , p.937
Hacker, B.R., Kelemen, P.B., and Behn, M.D. "Continental Relamination Drives Compositional and Physical-Property Changes in the Lower Crust" Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract , 2007 , p.V32A-06
Holbrook, S., D. Lizarralde, P. Kelemen and G. Yogodzinski "Seismic structure of the Aleutian island arc near Adak, Finally, a Subduction Factory that actually makes continental crust?" White Paper for GeoPRISMS Alaska Workshop, Portland, Oregon, September 2011 , 2011 , p.http://ww
(Showing: 1 - 10 of 35)

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