【摘要】 基于一系列地震剖面解释,发现塔里木盆地西部东西向的鸟山深部断裂(及其北的罗斯塔格深部断裂)白垩纪发生向北的冲断,向下收敛于中—下寒武统膏盐层;鸟山浅部断裂更新世向北冲断,可延至全新世。鸟山东断裂主要在白垩纪发生右行剪切,与北西向的海米塔格深部断裂共同构成东西向冲断带中的变换构造带。鸟山北断裂中新世发生右行走滑,在北西向断裂的冲断活动中起了剪切变换作用。鸟山及邻区晚中生代以来的构造样式,可总结为2套不同方向的冲断系及与之配套的2套剪切变换系。据此认为该地区的油气前景不容乐观,并对断裂发育区的油气勘探提出了若干建议。更多还原

【Abstract】 The EW-trending Niaoshan deep fracture locates in the west of Tarim Basin.According to seismic section analyses,the Niaoshan deep fracture as well as the Luositage deep fracture to the north both thrusted to the north during Cretaceous,and extended downwards till the Lower-Middle Cambrian gypsum-salt layer.The Niaoshan shallow fracture thrusted northwards during Pleistocene,and conti-nued to Holocene.The Niaoshan eastern fracture sheared right-laterally mainly in Cretaceous,forming transferring structural belt in EW-trending thrust belt together with the NW-trending Haimitage deep fracture.The Niaoshan northern fracture strike-slipped right-laterally during Miocene,playing the role of shearing transfer in the thrusting of NW-trending fracture.The tectonic styles in the Niaoshan and neighboring regions ever since the late Mesozoic were summarized into 2 sets of thrusting system with varied orientations,accompanied by 2 sets of shearing transfer.The Niaoshan region might not be a beneficial region for oil-and-gas exploration.Some suggestions for explorations in fracture well-deve-loped regions were presented.更多还原