The central Sierra Nevada batholith, an Andean-type magmatic arc, was emplaced in an overriding continental plate during the Cretaceous. Modern Andean studies imply the plate should be under compressional stress produced by subduction, however in the batholith only magmatic foliation is present and there is a virtual absence of regionally developed solid-state foliation. Given the compressional field thought to be active, these observations raise questions concerning the dynamic field attending emplacement of the batholith. This project will examine the geometry, kinematics and strain features of ductile shear zones in the batholith and wall rocks to establish their role in the dynamic and deformational history of batholith emplacement. Results are expected to shed light on upper crustal stress fields accompanying plutonism and in the fabrics developed in collisional tectonic environments.

Agency
National Science Foundation (NSF)
Institute
Division of Earth Sciences (EAR)
Type
Standard Grant (Standard)
Application #
9002672
Program Officer
Thomas O. Wright
Project Start
Project End
Budget Start
1990-07-01
Budget End
1993-06-30
Support Year
Fiscal Year
1990
Total Cost
$120,000
Indirect Cost
Name
University of California Santa Cruz
Department
Type
DUNS #
City
Santa Cruz
State
CA
Country
United States
Zip Code
95064