TY  - JOUR
A1  - Ghani, Humaad
A1  - Sobel, Edward
A1  - Zeilinger, Gerold
A1  - Glodny, Johannes
A1  - Irum, Irum
A1  - Sajid, Muhammad
T1  - Spatio-temporal structural evolution of the Kohat fold and thrust belt of Pakistan
T2  - Journal of structural geology
N2  - The Kohat fold and thrust belt in Pakistan shows a significantly different structural style due to the structural evolution on the double décollement  compared to the rest of the Subhimalaya. In order to better understand the spatio-temporal structural evolution of the Kohat fold and thrust belt, we combine balanced cross sections with apatite (U?Th-Sm)/He (AHe) and apatite fission track (AFT) dating. The AHe and AFT ages appear to be totally reset, allowing us to date exhumation above structural ramps. The results suggest that deformation began on the frontal Surghar thrust at-15 Ma, predating or coeval with the development of the Main Boundary thrust at-12 Ma. Deformation propagated southward from the Main Boundary thrust on double de?collements between 10 Ma and 2 Ma, resulting in a disharmonic structural style inside the Kohat fold and thrust belt. Thermal modeling of the thermochronologic data suggest that samples inside Kohat fold and thrust belt experienced cooling due to formation of the duplexes; this deformation facilitated tectonic thickening of the wedge and erosion of the Miocene to Pliocene foreland strata. The spatial distribution of AHe and AFT ages in combination with the structural forward model suggest that, in the Kohat fold and thrust belt, the wedge deformed in-sequence as a supercritical wedge (-15-12 Ma), then readjusted by out-sequence deformation (-12-0 Ma) within the Kohat fold and thrust belt into a sub-critical wedge.
KW  - Balanced cross section
KW  - Fold and thrust belt
KW  - Duplex
KW  - Exhumation
KW  - Décollement
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/63347
SN  - 0191-8141
VL  - 145
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -