Seismic potential and neotectonic studies at Karachi, Gadap and Hub areas, southern Kirthar Fold Belt, Pakistan

  • Ahmad Nabi East China University of Technology
  • Xiaodong Liu
  • Zhijun Gong
  • Umair Khalil
  • Abbas Ali
Keywords: Neotectonic, Earthquake Environmental Effects, active faults, Kirthar Fold Belt

Abstract

Neotectonic studies have been conducted in the southern inner part of Kirthar Fold Belt to locate earthquake environmental effects (EEEs). Possible active faults manifestations were studied in the Quaternary sediments to understand the intensity of seismic activity in the inner hind part of Karachi Arc area. Some major and strong seismic events have been occurred in the surrounding of the study area such as the Makran-1945, Anjar-1956, Bhuj-2001 and Awaran-2013 with magnitude 7.0 – 7.7Mw. Based on Satellite image interpretations, detailed neotectonic studies and seismicity, only ground shaking was observed in the southern inner part of Karachi Arc area and no EEEs such as neotectonic deformation features, surface ruptures and liquefaction were observed during the major and strong earthquakes caused by the surrounding distant seismogenic sources.  Minor to moderate seismic activity (3-5.9Mw) characterizes the northern and frontal parts of Karachi Arc while the southern inner part is tectonically stable block. The lithological studies of the Quaternary sediments exposed in the inner hind part of Karachi Arc have not revealed the existence of any distortion, off set in the sedimentary strata, paleo-liquefaction and fault propagation. This indicates the absence of seismogenic sources and no strong or major earthquake has occurred in this area in the Quaternary time that could cause any deformation

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Published
2019-07-01
How to Cite
[1]
A. Nabi, X. Liu, Z. Gong, Umair Khalil, and Abbas Ali, “Seismic potential and neotectonic studies at Karachi, Gadap and Hub areas, southern Kirthar Fold Belt, Pakistan”, pij, vol. 2, no. 2, pp. 76-86, Jul. 2019.
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Articles