Structural model of the Balkassar area, Potwar Plateau, Pakistan

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• 作者：Shahid Iqbal ; Gulraiz Akhter ; Sehrish Bibi
• 关键词：Balkassar ; Potwar Plateau ; Himalayan orogeny ; Crustal shortening ; Foreland basin
• 刊名：International Journal of Earth Sciences
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：104
• 期：8
• 页码：2253-2272
• 全文大小：9,955 KB
• 参考文献：Abbasi IA, McEiroy R (1991) Thrust kinematics of the Kohat Plateau, Trans Indus Salt Range, Pakistan. J Struct Geol 13:319-27CrossRef
  Arias C (2007) Pliensbachian–Toarcian ostracod biogeography in NW Europe: evidence for watermass structure evolution. Palaeogeogr Palaeoclimatol Palaeoecol 251:398-21CrossRef
  Baig MS, Lawrence RD (1987) Precambrian to early paleozoic orogenesis in the Himalaya. Kashmir J Geol 5:1-2
  Baker DM (1987) Balanced structural cross-sections of the central Salt Range and Potwar Plateau of Pakistan: shortening and overthrust deformation (Doctoral dissertation Oregon State University). Department of Geology, Oregon State University, Corvallis, p 120
  Baker DM, Lillie RJ, Yeats RS, Johnson GD, Yousuf M, Zamin ASH (1988) Development of the Himalayan frontal thrust zone: salt Range. Pakistan, Geol 16:3-
  Burbank DW, Raynolds RGH (1988) Stratigraphic keys to the timing of thrusting in the terrestrial foreland basins: applications to the northwest Himalaya. In: Kleinspahn KL, Paol C (eds) Frontiers in sedimentary geology, new perspective in basin analysis. Springer, Berlin, pp 331-51CrossRef
  Butler RWG, Coward MP, Harwood GM, Knipe RJ (1987) Salt, its control on thrust geometry, structural style and gravitational collapse along the Himalayan mountain front in the Salt Range of northern Pakistan. In: Lerche I, O’Brien JJ (eds) Dynamical geology of salt-related structures. Academic Press, Orlando, Florida, pp 339-18CrossRef
  Carosi R, Lombardo B, Molli G, Musumeci G, Pertusati PC (1998) The South Tibetan detachment system in the Rongbuk valley, Everest region. Deformation features and geological implications. J Asian Earth Sci 16:299-11CrossRef
  Carosi R, Montomoli C, Visonà D (2007) A structural transect in the lower Dolpo: insights on the tectonic evolution of Western Nepal. J Asian Earth Sci 29:407-23. doi:10.-016/?j.?jseaes.-006.-5.-01 CrossRef
  Damborenea ES (2002) Jurassic evolution of Southern Hemisphere marine palaeobiogeographic units based on benthonic bivalves. Geobios Mémoire spécial n° 24, 51-1
  Davies RG, Crawford AR (1971) Petrography and age of the rocks of bulland hill, kirana hills, Sargodha district, west Pakistan. Geol Mag 08(03):235-46. doi:10.-017/?S001675680005158?X CrossRef
  Davis DM, Engelder T (1985) The role of salt in fold-and-thrust belts. Tectonophysics 119(1-):67-8. doi:10.-016/-040-1951(85)90033-2 CrossRef
  Davis DM, Lillie RJ (1994) Changing mechanical response during continental collision: active examples from the foreland thrust belts of Pakistan. J Struct Geol 16:21-4CrossRef
  DeCelles PG, Robinson DM, Zandt G (2002) Implications of shortening in the Himalayan fold-thrust belt for uplift of the Tibetan Plateau. Tectonics 21(6):1062-087. doi:10.-029/-001TC001322 CrossRef
  Duroy Y, Farah A, Lillie RJ (1989) Subsurface densities and lithospheric flexure of the Himalayan foreland in Pakistan. Geol Soc Am Spec Pap 232:217-36
  Farah A, Abbas G, De Jong KA, Lawrence RD (1984) Evolution of the lithosphere in Pakistan. Tectonophysics 105(1):207-27CrossRef
  Fatmi AN (1973) Lithostratigraphic units of the Kohat-Potwar Province Indus Basin Pakistan. Geol Soc Pak Mem 10(3):22-8
  Ganley DC (1981) A method for calculating synthetic seismograms which include the effects of absorption and dispersion. Geophysics 46(8):110-107CrossRef
  Gansser A (1979) The Himalayas—a fascinating geological challenge. Episodes 4:17-1
  Gansser A (1980) The significance of the Himalayan suture one. Tectonophysics 62(1):37-2CrossRef
  Gee ER (1945) The age of the saline series of the Punjab and of Kohat. Proc Indian Acad Sci Sect B 14:269-10
  Gee ER (1947) Further note on the age of the saline series of the Punjab and of Kohat. Proc Indian Acad Sci Sect B 16:95-53
  Gee ER (1980) Pakistan Geological Salt Range Series: Directorate of Overseas Surveys. United Kingdom, for Gov Pak Geol Surv Pak 6 sheets, scale 1:50,000
  Gee ER (1989) Overview of the geology and structure of the Salt Range, with observations on related areas of northern Pakistan. In: Malinconico LL, Jr. Lillie RJ, (eds.) Tectonics of the western Himalayas. Geol Soc Am Spec Pap. 232: 95-11
  Ghazi S, Mountney N, Butt A, Sharif S (2012) Stratigraphic and palaeoenvironmental framework of the Early Permian sequence in the Salt Range, Pakistan. J Earth Syst Sci 121(5):1239-255. doi:10.-007/?s12040-012-0225-3 CrossRef
  Ghazi S, Haroon AS, Sahraeyan M, Hanif T (in press) An overview of tectonosedimentary framework of the Salt Range, northwestern Himalayan fold and thrust belt, Pakistan. Arab J Geosci. DOI 10.-007/?s12517-014-1284-3
  Greland S, Sassi W, Lamotte DF, Jaswal T, Roure F (2002) Kinematics of eastern Salt Range and Southern Potwar Basin (Pakistan): a new scenario. Mar Petrol Geol 19:1127-139CrossRef
  Hallam A, Maynard JB (1987) The iron ores and associated sediments of the Chichali Formation (Oxfordian to Valanginian) of the T
• 作者单位：Shahid Iqbal (1) (2)
  Gulraiz Akhter (1)
  Sehrish Bibi (3)
  
  1. Department of Earth Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
  2. Department of Geodynamics and Sedimentology, University of Vienna, Vienna, Austria
  3. Schlumberger, Islamabad, Pakistan
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geology
  Geophysics and Geodesy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1437-3262

文摘

Balkassar is an important hydrocarbon producing area of the Potwar Plateau, Pakistan. Two-dimensional seismic reflection data of the area revealed tectonically controlled, distinct episodes of (1) normal faulting in the basement followed by (2) reverse faulting in the cover sequence. Himalayan orogeny and associated diapirism of the Precambrian Salt Range Formation have produced many salt-cored anticlines in the Potwar Plateau, and one such salt-cored anticline is present in the Balkassar. This anticline has NE–SW-oriented axis, and both the SE and NW limbs are bounded by reverse faults. The basement normal faults indicate Jurassic rifting and splitting of Pangaea. We interpret reverse faults with dip angles of about 60°-5° in the cover sequence, having both hinterland and foreland vergence. Both NW- and SE-dipping faults are present in contrast to the only southward-directed thrusts of previous models. Duplexes and triangle zones, which are common in the northern part of the Potwar Plateau, are not developed in the Balkassar area due to comparatively less crustal shortening in the area. The present interpretation can help in understanding the complex structures in other parts of the Potwar Plateau for hydrocarbons exploration and also in deformed foreland basins worldwide that display similar characteristics but are considered to be dominated by low-angle thrust tectonics. Keywords Balkassar Potwar Plateau Himalayan orogeny Crustal shortening Foreland basin