塔里木盆地西部鸟山地区断裂的主要特征和活动时代
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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。
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.
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.
引文
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[18]陈强路,周凌方,张根法,等.塔里木盆地巴楚—麦盖提地区油气勘探领域评价[J].石油实验地质,2009,31(4):343-349.
[19]吴根耀.造山带古地理学:重建区域构造古地理的若干思考[J].古地理学报,2007,9(6):635-650.
[20]吴根耀,马力,里群,等.继承性构造与新生构造并存的时空发育特征:“盆”“山”耦合理论指导油气勘探的一个切入点[J].石油实验地质,2010,32(1):1-9.
[21]李曰俊,吴根耀,雷刚林,等.新疆库车新生代前陆褶皱冲断带的变形特征、时代和机制[J].地质科学,2008,43(3):488-506.
[22]吴根耀,梁江平,杨建国,等.白垩纪北东向构造与松辽盆地演化和油气成藏[J].大庆石油地质与开发,2009,28(6):1-11.
[2]李洪辉,邬光辉,王洪江,等.塔里木盆地和田河气田周缘构造演化、成藏与勘探领域[J].现代地质,2009,23(4):587-594.
[3]赵岩,李勇,吴根耀,等.塔里木盆地西部罗斯塔格地区断裂特征和活动时代[J].石油与天然气地质,2010,31(6):795-801.
[4]杨海军,李曰俊,冯晓军,等.塔里木盆地玛扎塔格构造带断裂构造分析[J].地质科学,2007,42(3):506-517.
[5]李曰俊,吴根耀,孟庆龙,等.塔里木盆地中央地区的断裂系统:几何学、运动学和动力学背景[J].地质科学,2008,43(1):82-118.
[6]吴根耀,马力.“盆”“山”耦合和脱耦在含油气盆地分析中的应用[J].石油实验地质,2003,25(6):648-660.
[7]高长林,叶德燎,张玉箴,等.塔里木中新生代盆地扩张和盆地俯冲与地幔柱[J].石油实验地质,2003,25(6):661-669,678.
[8]吴根耀.造山带地层学[M].成都:四川科学技术出版社,2000.
[9]吴根耀,王晓鹏,钟大赉.藏东南地区早白垩世的安第斯型弧火山岩[J].岩石学报,1999,15(3):422-429.
[10]苗继军,贾承造,侯向辉,等.塔里木盆地西部喀什地区新生代褶皱冲断带构造解析[J].地质科学,2007,42(4):740-752.
[11]孟庆龙,李曰俊,师骏,等.塔里木盆地西部色力布亚断裂和康西断裂的主要特征及活动时代[J].地质科学,2008,43(2):282-293.
[12]高志农.塔里木盆地巴楚隆起烃源岩特征及其油气源研究[J].石油实验地质,2000,22(4):319-324.
[13]李新民,丁勇,张旭,等.巴楚—麦盖提地区不整合面特征与油气分布关系[J].新疆石油地质,2001,22(6):475-477.
[14]刘高波,施泽进,佘晓宁.巴楚—麦盖提的区域构造演化与油气分布规律[J].成都理工大学学报(自然科学版),2004,31(2):157-161.
[15]康玉柱.塔里木前陆盆地构造特征及油气分布[J].石油实验地质,2005,27(1):25-27.
[16]孟庆龙,李曰俊,敬兵,等.塔里木盆地西部巴什托普断裂的主要特征及其油气勘探意义[J].地质科学,2008,43(3):569-575.
[17]吴根耀,杨海军,王步清,等.塔里木克拉通继承性构造与新生构造并存的时空发育特征及其对海相油气勘探的指导[J].石油实验地质,2009,31(4):315-323.
[18]陈强路,周凌方,张根法,等.塔里木盆地巴楚—麦盖提地区油气勘探领域评价[J].石油实验地质,2009,31(4):343-349.
[19]吴根耀.造山带古地理学:重建区域构造古地理的若干思考[J].古地理学报,2007,9(6):635-650.
[20]吴根耀,马力,里群,等.继承性构造与新生构造并存的时空发育特征:“盆”“山”耦合理论指导油气勘探的一个切入点[J].石油实验地质,2010,32(1):1-9.
[21]李曰俊,吴根耀,雷刚林,等.新疆库车新生代前陆褶皱冲断带的变形特征、时代和机制[J].地质科学,2008,43(3):488-506.
[22]吴根耀,梁江平,杨建国,等.白垩纪北东向构造与松辽盆地演化和油气成藏[J].大庆石油地质与开发,2009,28(6):1-11.
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