鄂尔多斯盆地西缘构造特征及其成因机制
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摘要
目的探究鄂尔多斯盆地西缘构造特征与成因机制。方法利用地震剖面解释、构造解析等方法进行研究。结果断裂以走向近南北向逆冲断层为主,其次为正断层与走滑断层,共分为4级。南北构造特征差异明显,北区为冲断体系,在桌子山段发育一系列西倾逆冲断层,铁克苏庙段发育断隆和前缘三角带,陶乐—横山堡段发育叠瓦状东倾逆断层;中区为逆冲推覆体系,在马家滩段发育薄皮构造,惠安堡段发育厚皮构造,甜水堡段发育叠瓦式逆冲推覆;南区为逆冲体系。西缘三叠纪—中侏罗世为陆相残延克拉通内叠合盆地;构造变形主要发生于侏罗纪末期,为陆内前陆盆地发育时期;早白垩世进入挤压期后伸展作用阶段;新生代北区处于伸展背景,而南区处于挤压背景,中区为它们之间的调节带。结论鄂尔多斯盆地西缘具有典型"南北分段"特点,其构造格局主要定型于侏罗纪末期。
Aim To study the tectonic characteristics and forming mechanism of the western margin of the Ordos Basin.Methods Based on the seismic section interpreting and tectonic analysis by this theory.Results It is shown that the fractures are mainly near NS trending thrust faults,followed by normal faults and strike-slip faults,which are divided into four levels.There are significant differences of structural characteristics from North to South,the North area is the thrust system,which are a series of west dipped thrust faults at Zhuozishan Mountain,faulted dome and triangular belt at Tiekesumiao and imbricated east dip reversed fault at Taole-Hengshanbu;the mid-area is the thrust nappe system,which are the thin skinned structure at Majiatan,the thick skinned structure at Huianbu and the imbricated thrust nappe at Tianshuibu;the south area is the thrusting system.It is concluded that the structure distortion mainly formed and it became a foreland basin in the Upper Jurassic.It is in a postcollisional setting in lower Cretaceous;the North area is in a postcollisional setting,but the South area is in a collisional setting,the middle area is the adjust part between the North area and the South area.Conclusion The tectonic characteristics is different from North to South,and the structure framework was mainly formed in the Upper Jurassic.
Aim To study the tectonic characteristics and forming mechanism of the western margin of the Ordos Basin.Methods Based on the seismic section interpreting and tectonic analysis by this theory.Results It is shown that the fractures are mainly near NS trending thrust faults,followed by normal faults and strike-slip faults,which are divided into four levels.There are significant differences of structural characteristics from North to South,the North area is the thrust system,which are a series of west dipped thrust faults at Zhuozishan Mountain,faulted dome and triangular belt at Tiekesumiao and imbricated east dip reversed fault at Taole-Hengshanbu;the mid-area is the thrust nappe system,which are the thin skinned structure at Majiatan,the thick skinned structure at Huianbu and the imbricated thrust nappe at Tianshuibu;the south area is the thrusting system.It is concluded that the structure distortion mainly formed and it became a foreland basin in the Upper Jurassic.It is in a postcollisional setting in lower Cretaceous;the North area is in a postcollisional setting,but the South area is in a collisional setting,the middle area is the adjust part between the North area and the South area.Conclusion The tectonic characteristics is different from North to South,and the structure framework was mainly formed in the Upper Jurassic.
引文
[1]汤锡元,郭忠铭,王定一.鄂尔多斯盆地西部逆冲推覆构造带特征及其演化与油气勘探[J].石油与天然气地质,1988,9(1):1-10.
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[4]张进,马宗晋,任文军.鄂尔多斯西缘逆冲褶皱带构造特征及其南北差异的形成机制[J].地质学报,2004,78(5):600-611.
[5]赵红格,刘池洋,王峰,等.鄂尔多斯盆地西緣构造分区及其特征[J].石油与天然气地质,2006,27(2):173-178.
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[10]方国庆,刘德良.鄂尔多斯盆地中部东西向天然气聚集带研究[J].石油实验地质,2000,22(2):146-154.
[11]汤锡元,郭忠铭,陈荷立,等.陕甘宁盆地西缘逆冲推覆构造及油气勘探[M].西安:西北大学出版社,1992.
[12]王汉卿.中国纬向褶皱构造带研究[M].北京:地震出版社,1999.
[13]吴紫电.马家滩推覆体结构形态及与周边构造关系[M]∥杨俊杰,赵重远,刘和甫,等.鄂尔多斯盆地西缘掩冲带构造与油气.兰州:甘肃科学技术出版社,1990.110-12.
[14]刘池洋,赵红格,王锋,等.鄂尔多斯盆地西缘(部)中生代构造属性[J].地质学报,2005,79(6):737-747.
[15]郑莉,王玉青,赵俊峰,等.CEMP勘探在鄂尔多斯西缘前陆盆地的应用效果[J].中国石油勘探,2005(5):41-44.
[16]张义楷,周立发,党犇,等.鄂尔多斯盆地中新生代构造应力场与油气聚集[J].石油实验地质,2006,28(3):215-219.
①王润三,张宏法,彭天浪,等.鄂尔多斯盆地岩浆岩分布及其与油气聚集的关系,中国石油长庆油田分公司内部报告,2007。
[2]杨俊杰,张伯荣.鄂尔多斯盆地西缘掩冲构造带的基本特征[M]∥杨俊杰,赵重远,刘和甫,等.鄂尔多斯盆地西缘掩冲带构造与油气.兰州:甘肃科学技术出版社,1990:91-105.
[3]赵重远.鄂尔多斯地块西缘构造单位划分及构造展布格局和形成机制[M]∥杨俊杰,赵重远,刘和甫,等.鄂尔多斯盆地西缘掩冲带构造与油气.兰州:甘肃科学技术出版社,1990:40-53.
[4]张进,马宗晋,任文军.鄂尔多斯西缘逆冲褶皱带构造特征及其南北差异的形成机制[J].地质学报,2004,78(5):600-611.
[5]赵红格,刘池洋,王峰,等.鄂尔多斯盆地西緣构造分区及其特征[J].石油与天然气地质,2006,27(2):173-178.
[6]刘少峰,杨士恭.鄂尔多斯盆地西缘南北差异及其形成机制[J].地质科学,1997,32(3):397-408.
[7]王峰,刘池洋,赵红格.鄂尔多斯地块西部南北向拆离滑覆构造[J].地球科学与环境学报,2004,26(1):17-20.
[8]孙家振.前陆盆地逆冲断层类型与形成机制———以鄂尔多斯地块西缘和塔里木西缘为例[J].石油与天然气地质,1991,12(4):406-415.
[9]王泽成,王玉新.鄂尔多斯西缘马家滩滑脱型冲断构造[J].石油与天然气地质,1996,17(3):221-225.
[10]方国庆,刘德良.鄂尔多斯盆地中部东西向天然气聚集带研究[J].石油实验地质,2000,22(2):146-154.
[11]汤锡元,郭忠铭,陈荷立,等.陕甘宁盆地西缘逆冲推覆构造及油气勘探[M].西安:西北大学出版社,1992.
[12]王汉卿.中国纬向褶皱构造带研究[M].北京:地震出版社,1999.
[13]吴紫电.马家滩推覆体结构形态及与周边构造关系[M]∥杨俊杰,赵重远,刘和甫,等.鄂尔多斯盆地西缘掩冲带构造与油气.兰州:甘肃科学技术出版社,1990.110-12.
[14]刘池洋,赵红格,王锋,等.鄂尔多斯盆地西缘(部)中生代构造属性[J].地质学报,2005,79(6):737-747.
[15]郑莉,王玉青,赵俊峰,等.CEMP勘探在鄂尔多斯西缘前陆盆地的应用效果[J].中国石油勘探,2005(5):41-44.
[16]张义楷,周立发,党犇,等.鄂尔多斯盆地中新生代构造应力场与油气聚集[J].石油实验地质,2006,28(3):215-219.
①王润三,张宏法,彭天浪,等.鄂尔多斯盆地岩浆岩分布及其与油气聚集的关系,中国石油长庆油田分公司内部报告,2007。
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