( 1975).ĭetailed geological field was conducted to study the area. ( 2018) Hylland and Riaz ( 1988) and Calkins et al. 1 adopted and modified after Yaseen et al. Tectonic map of northern Pakistan, the black rectangle in the preset marks the location of the study area as shown in Fig. The Kala Chitta Range (KCR) is a part of the active Himalayan Foreland Fold-and-Thrust Belt which has progressively been verged southward in a series of top to the south thrust imbricates along Main Boundary Thrust (MBT), fabricating the regional fault system of Northern Pakistan (Wadood et al. The Kahi gorge lies in the Himalayan foothills of Nizampur valley in Khyber Pakhtunkhwa of North West Pakistan. In the area, the rocks exposed in the ACR and those exposed at the Kahi gorge are highly folded. The study area located in the vicinity of the Main Boundary Thrust fault (MBT) has experienced intense deformation and shortening resulting in thrust faults and various large and small-scale folds. The foreland basin strata of the Kala Chitta Range bound the area toward the south (Hashmi et al. The ACR bound the area to the north and includes metasedimentary rocks of the lesser Himalayas. In ACR, sediments of Pre-Cambrian to Paleocene are outcropping. Movement along the Hissartang thrust deformed the rocks of ACR and Kala Chitta Range (Ghauri et al. The boundary between ACR and Kala Chitta Range is delineated by Hissartang Thrust in Nizampur basin, where it splits the southern slab of ACR from Kala Chitta Range (Yeats and Hussain 1987). The Attock-Cherat Range (ACR) is positioned between Peshawar Basin on the north and Kala Chitta Range on the south (Burbank and Johnson 1982). Tectonically, the mapped area is enclosed by the region of active thrusting and folding in the foreland of the 2489 km long Himalayan highland in Pakistan, therefore, showing a complicated structural arrangement (Yeats and Hussain 1987). The present work involves surface mapping and structural analysis of two transects oriented NS and NE-WS along with other major and minor structural features. Other works include Kazmi and Jan, 1997 on geology and tectonics of Nizampur, Yeats and Hussain ( 1987) studied timing of structural events in Himalayan foothills of northwestern Pakistan. ( 2013) mapped and performed structure analysis of a part of Kala Chitta Range near Kahi Nizampur. Recently, diverse approaches have been made to the Nizampur and adjoining area consists mostly on study of sequence stratigraphy, reservoir quality, Geochemistry along microfacies of various successions, i.e., Khan et al. Sandwiched among these two faults, the study area has experienced intense compression (Fig. This area signifies the foot and hanging wall of the Hissartang fault and Main Boundary Thrust correspondingly. The study area located in the vicinity of the Main Boundary Thrust fault (MBT) has experienced intense deformation and shortening resulting in thrust faults and various large- and small-scale folds. The focused area is bounded with coordinates N 33° 48′ 52.99′′, E 72° 03′ 18.80′′ and is divided into two parts with younger Eocene rocks to the East and sequentially older Paleocene, Cretaceous and Jurassic successions exposed to the West of the mapped area. The study area is located in the Nizampur basin Kahi valley of Khyber Pakhtunkhwa, North West Pakistan. Restoration of the structural transects was calculated and assumed that at the formation of Main Boundary Thrust, the study area was exposed to the tectonic forces which prognosticated 19.5% shortening in rock sequences from Jurassic to Eocene succession along the measured cross section A_B. Two structural transect were mapped which encounter different folds and faults, i.e., X-sections AB oriented NS and CD oriented NE-SW. There are Eocene rocks existing in the extreme South of the mapped area with addition of older Cretaceous and Jurassic succession and contains simple and large-scale folds, faults and back thrust. The folded and faulted rocks in the area show that stratigraphic framework comprises of Eocene, Paleocene, Cretaceous and Jurassic succession of rocks. These thrust faults carried the older sequences of rocks over the younger sequences in different portion along the measured cross section. Four central thrust faults were recognized named as Kahi Thrusts along the cross sections. The work also includes the documentation of several surface structural features, i.e., anticlines, synclines and different types of folds and faults exposed in the vicinity of study area. The current research work is an attempt to apply the basic geological procedures, methods of geological mapping, surface and subsurface interpretation and restoration of balanced and retrodeformed cross sections from the Nizampur basin, Khyber Pakhtunkhwa, Pakistan.
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