NSF Award Search: Award # 0350991

Award Abstract # 0350991

Collaborative Proposal: Re-Assessing Hotspot Models in the Pacific Basin with High Resolution 40Ar/39Ar Dating of Volcanic Activity in the Line Islands & Louisville Seamount Trail

NSF Org:	OCE Division Of Ocean Sciences
Recipient:	UNIVERSITY OF CALIFORNIA SAN DIEGO
Initial Amendment Date:	July 21, 2004
Latest Amendment Date:	August 15, 2006
Award Number:	0350991
Award Instrument:	Standard Grant
Program Manager:	Bilal U. Haq OCE Division Of Ocean Sciences GEO Directorate for Geosciences
Start Date:	August 1, 2004
End Date:	July 31, 2007 (Estimated)
Total Intended Award Amount:	$0.00
Total Awarded Amount to Date:	$182,253.00
Funds Obligated to Date:	FY 2004 = $182,253.00
History of Investigator:	Anthony Koppers (Principal Investigator) akoppers@coas.oregonstate.edu
Recipient Sponsored Research Office:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA US 92093-1500 (858)534-1293
Sponsor Congressional District:	50
Primary Place of Performance:	University of California-San Diego Scripps Inst of Oceanography 8622 DISCOVERY WAY # 116 LA JOLLA CA US 92093-1500
Primary Place of Performance Congressional District:	50
Unique Entity Identifier (UEI):	QJ8HMDK7MRM3
Parent UEI:	QJ8HMDK7MRM3
NSF Program(s):	Marine Geology and Geophysics
Primary Program Source:	app-0104
Program Reference Code(s):	0000, 1620, OTHR
Program Element Code(s):	162000
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

ABSTRACT

To do a basin-wide test of the fixed hotspot model requires accurate and precise radiometric ages that only now have become possible through improvement in Ar40/Ar39 dating of altered submarine basalts. By re-dating existing samples the investigators will generate a state-of-the-art Ar40/Ar39 age database. This project will re-date 37 seamounts that fall within the 30-100 MA age range in the Line Islands and the Louisville seamounts incremental heating Ar40/Ar39 dating, and measure Hf-Sr-Nd-Pb isotopes and major/trace element abundances to characterize these basalts in terms of mantle source and stage of volcanic activity. These data will be used to assess the fixed and moving hotspot models.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Anthony A.P. Koppers "The Geochronology of Hotspot Trails and the Timing of the Hawaii-Emperor Bend" Invited talk Chapman Conference, the Great Plume Debat, Fort William, Scotland , 2005 , p.1

Anthony A.P. Koppers, Hubert Staudigel, Bob Duncan, Bernhard Steinberger, Jan R. Wijbrans, Malcolm S. Pringle "On the Systematics of Primary and Secondary Hotspots in the Pacific" Western Pacific AGU Meeting, Honolulu, Hawaii , 2004 , p.1

Anthony A.P. Koppers, Robert A. Duncan and Bernhard Steinberger "Implications of a non-linear 40Ar/39Ar age progression along the Louisville seamount trail for models of fixed and moving hotspots" Geochemistry, Geophysics, Geosystems , v.5(6) , 2004 , p.1

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