Kink bands in thrust regime: Examples from Srinagar–Garhwal area,Uttarakhand, India |
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| Authors: | SHASHANK SHEKHAR A M BHOLA P S SAKLANI |
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| Institution: | 1.Department of Geology,University of Delhi,Delhi,India |
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| Abstract: | This paper deciphers the late stress systems involved in the development of kink bands in the perspective of thrust regime.
In kink bands, the correlation coefficient for α–β plots is positive near thrusts and negative away from thrusts. The plots show nearly linear relationship near thrusts and
non-linear relationship away from thrusts. The rotation was prominent mechanism of kink band formation near thrusts and rotation
coupled with shearing, along the kink planes away from thrusts. Along thrusts σ
1 is horizontal E–W trend and it rotates to horizontal N–S trend away from the thrust. The proposed model establishes that
(1) the shearing along kink planes led to angular relationship, β < α and (2) the kink planes of conjugate kinks could be used for paleostress analysis even in those cases where shearing along
these planes has occurred. |
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