Balanced cross-section across the Ziarat block, Western Sulaiman fold belt and hydrocarbon exploration | Seventh International Conference on Earth Sciences Pakistan (ESP-2024), June 2-4, 2024 (Abstract Book) 2024

Author(s)

Saif-Ur-Rehman K. Jadoon State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences,Beijing, 100101,China

Lin Ding State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences,Beijing, 100101,China; University of Chinese Academy of Sciences,Beijing,China

Ishtiaq A. K. Jadoon Jadoon Manzil, Behind Abbottabad Megamall,Abbottabad,Pakistan

Abstract

In order to understand foreland deformation in the western fold-and-thrust belt of Sulaiman ranges, Pakistan, subsurface seismic reflection and well data was acquired while mapping a balanced-cross-section. Interpretation of seismic profiles show the geometry of a petroleum play as vergence of asymmetrical hinterland folds and foreland folds. The Triassic age detachment folds (~6 km depth in the pelitic strata) are located over the tip of blind thrusts of flat-ramp and flat-ramp-flat geometry. Whereas, the decollement floor thrust (~11 km depth in the Triassic strata) was interpreted with stacked duplexe s covered by a passive roof-thrust of hinterland vergence in Ghazij strata of Eocene age. The deformation is represented by passive-roof duplex with presence of a monocline and absence of an emergent thrust with duplicated strata between floor and roof thrust in the foreland. The balanced cross-section reveals deformation of intraplate in series of frontal duplex at the hanging-wall. The deformed balanced cross-section of 33 km was restored to an original length of ~71 km with 54% shortening in the foreland. About 12 km (17%) of the overall shortening is marked by an out-of-sequence blind hinterland-vergent thrust. The geometry and kinematics of deformation based on this study serves as an example of complex foreland deformation for successful exploration and exploitation of hydrocarbons.

Publication Details

Page(s) 1-1

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Published Journal: Seventh International Conference on Earth Sciences Pakistan (ESP-2024), June 2-4, 2024 (Abstract Book), Volume: 0, Issue: 0, Year: 2024

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