NSF Org:	OCE Division Of Ocean Sciences
Recipient:	UNIVERSITY OF CALIFORNIA SAN DIEGO
Initial Amendment Date:	February 4, 1991
Latest Amendment Date:	April 7, 1992
Award Number:	9018421
Award Instrument:	Continuing Grant
Program Manager:	Bilal U. Haq OCE  Division Of Ocean Sciences GEO  Directorate for Geosciences
Start Date:	February 15, 1991
End Date:	January 31, 1993 (Estimated)
Total Intended Award Amount:	$144,429.00
Total Awarded Amount to Date:	$144,429.00
Funds Obligated to Date:	FY 1991 = $70,857.00 FY 1992 = $73,572.00
History of Investigator:	Jason Phipps Morgan (Principal Investigator) jp369@cornell.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:	DATA NOT AVAILABLE
Primary Place of Performance Congressional District:
Unique Entity Identifier (UEI):	QJ8HMDK7MRM3
Parent UEI:	QJ8HMDK7MRM3
NSF Program(s):	Marine Geology and Geophysics
Primary Program Source:
Program Reference Code(s):
Program Element Code(s):	162000
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

This is a theoretical study of the dynamic processes shaping mantle flow beneath mid-ocean spreading centers. three dimensional numerical models of flow beneath a spreading center will be constructed to try to explain observed bulls-eye gravity anomalies along slow-spreading ridges and their absence along intermediate and fast spreading ridges. The models will include the irreversible effects of melting on shaping the density structure and will explore the effects of spatial, temperature, and composition dependent rheology.

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