Loading...
Kinematic Analysis of Ductile Deformation in the Goochland Terane, Virginia
Simmons, Stephan
Simmons, Stephan
Abstract
The Goochland Terrane is a highly deformed group of metamorphic rock units that form the easternmost internal basement massif of the southern Appalachians. A minimum of three deformational events is known to have affected the Goochland Terrane. This study seeks to examine these various deformational events. Using data collected by Weems (1981) along with data collected from an oriented sample of Montpelier Anorthosite, a number of deformation features were studied to further look in to the kinematics and structural geometries of the deformation in the Goochland Terrane. The first deformational event (Dg) resulted in (Sg) foliation and (F,) folds preserved in granulite rocks experiencing little later deformation. The second deformational event (D1) produced (F;) folds and (S;) axial planar foliation. The final deformational event (D2) created (F2) folds with a subsequent weak (Sz) foliation. Analysis of an orientated sample of the Montpelier Anorthosite gives evidence to the multi faceted nature of deformation in the Goochland terrane. Folds of variable orientation as well as non-uniform foliations were measured and seem to record evidence from all three deformational events. All the observations are consistent with the pre-existing hypothesis of three deformational events.
Description
Date
2013-01-01
Journal Title
Journal ISSN
Volume Title
Publisher
Collections
Download Dataset
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Advisor
Department
Geology