Analysis on Fracture-Control Factors for Structural Deformation of Jurassic Coal-Bearing Strata in Eastern Section of Mountain Front, North Junggar Basin

Based on the interface tracking and interpretation of three main seismic profiles in the eastern section of mountain front of North Junggar Basin, and combined with previous research results, it is concluded that in the thrusting system in Wulungu depression-North Dishuiquan upheaval, from east to west, its fracture surface is varied from steep to gradual, while structural level from deep to shallow and structural deformation from fierce to gentle; the Jurassic coal-bearing strata present a big asymmetric syncline appearance, which including a wide and gradual western wing and a narrow and steep eastern wing. The deformation of coal-bearing strata between two paralleled factures within the eastern thrusting system and western thrusting system where suffused with fractures is fiercer than the middle Wulungu depression area where lack of fracture, and the deformation of coal-bearing strata between two paralleled faults in the eastern system is fiercer than in the western system. The fracture distribution shows a significant control in structural deformation of coal-bearing strata in study area.