NSF Org:	EAR Division Of Earth Sciences
Recipient:	REGENTS OF THE UNIVERSITY OF MINNESOTA
Initial Amendment Date:	July 19, 1995
Latest Amendment Date:	August 6, 1998
Award Number:	9506504
Award Instrument:	Standard Grant
Program Manager:	Thomas O. Wright EAR  Division Of Earth Sciences GEO  Directorate for Geosciences
Start Date:	August 15, 1995
End Date:	January 31, 1999 (Estimated)
Total Intended Award Amount:	$110,067.00
Total Awarded Amount to Date:	$110,067.00
Funds Obligated to Date:	FY 1995 = $110,067.00
History of Investigator:	Peter Hudleston (Principal Investigator) hudle001@umn.edu
Recipient Sponsored Research Office:	University of Minnesota-Twin Cities 2221 UNIVERSITY AVE SE STE 100 MINNEAPOLIS MN  US  55414-3074 (612)624-5599
Sponsor Congressional District:	05
Primary Place of Performance:	University of Minnesota-Twin Cities 2221 UNIVERSITY AVE SE STE 100 MINNEAPOLIS MN  US  55414-3074
Primary Place of Performance Congressional District:	05
Unique Entity Identifier (UEI):	KABJZBBJ4B54
Parent UEI:
NSF Program(s):	Tectonics
Primary Program Source:	app-0195
Program Reference Code(s):	0000, OTHR
Program Element Code(s):	157200
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

Ductile shear zones in rocks commonly develop in three-dimensional arrays involving non-plane strains and possibly volume loss. The purpose of this project is to establish the pattern of strain and fabric development in ductile shear zones that form an anastomosing network in three dimensions, to understand the kinematics of deformation, and to test models of shear zone development. The shear zone to be studied developed in high-grade metagabbros of the Seve-koli nappes of the northern Swedish Caledonides. Preliminary strain analysis according to the planar band model of shear zone development indicates volume loss with increasing strain, yet available geochemical data indicate that deformation occurred under isochemical conditions. The three-dimensional strain analysis will be applied to the resolution of the volume loss paradox, and a successful result will be broadly applicable.

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