NSF Org:	OCE Division Of Ocean Sciences
Recipient:	UNIVERSITY OF MIAMI
Initial Amendment Date:	December 23, 2008
Latest Amendment Date:	December 23, 2008
Award Number:	0906573
Award Instrument:	Standard Grant
Program Manager:	Barbara Ransom bransom@nsf.gov  (703)292-7792 OCE  Division Of Ocean Sciences GEO  Directorate for Geosciences
Start Date:	January 1, 2009
End Date:	December 31, 2010 (Estimated)
Total Intended Award Amount:	$80,736.00
Total Awarded Amount to Date:	$80,736.00
Funds Obligated to Date:	FY 2009 = $80,736.00
History of Investigator:	David Kadko (Principal Investigator) dkadko@fiu.edu
Recipient Sponsored Research Office:	University of Miami 1251 MEMORIAL DR CORAL GABLES FL  US  33146-2509 (305)421-4089
Sponsor Congressional District:	27
Primary Place of Performance:	University of Miami 1251 MEMORIAL DR CORAL GABLES FL  US  33146-2509
Primary Place of Performance Congressional District:	27
Unique Entity Identifier (UEI):	KXN7HGCF6K91
Parent UEI:	VNZZYCJ55TC4
NSF Program(s):	Marine Geology and Geophysics
Primary Program Source:	01000910DB NSF RESEARCH & RELATED ACTIVIT
Program Reference Code(s):	0000, 9237, OTHR
Program Element Code(s):	162000
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

This research facilitates the collection and analysis of radium isotope ratios in high temperature and pressure hydrothermal submarine vent fluids collected from the seafloor. These measurements will allow the crustal residence times of the fluids to be determined, providing important information on the time scales of fluid movement and water-rock interaction in ridge axis crust. Rock and fluid samples from four major hydrothermal systems (East Pacific Rise, Lau Spreading Center, Juan de Fuca Ridge, and Mid-Atlantic Ridge) on the mid-ocean ridge will be analyzed. Resulting data are critical for the synthesis and integration of rock and biological data for the Ridge 2000 program which focuses on three of the four specified targeted sites. Owing to the rapid decay of radium in hydrothermal fluids, the research to be a time critical study. Broader impacts of the work include augmenting the Ridge 2000 dataset and incorporation of results into undergraduate courses in oceanography at the University of Miami.

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