Extensional Strain using Pull-Apart Pyrite Grains from the Chamba Syncline, Himachal Himalaya

Abstract

Strain reversal technique is applied to the pull-apart pyrite grains collected from the Chamba Formation of the Chamba Syncline. The computed ratio values of the extensional strain for X:Z section of the strain ellipsoid varies from 2.3 to 2.7 for the pyrite grains. The X direction of the strain ellipsoid coincides with the stretching lineation direction indicating minimum amount of strain values required for its development on the cleavage plane.