鄂尔多斯盆地西缘沙井子——平凉地区构造样式与形成机制
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摘要
探究鄂尔多斯盆地西缘沙井子-平凉段的构造样式与成因机制。以沙井子-平凉地区及其邻区7条地质剖面的野外观察以及钻井资料作为约束,综合利用重力资料和航磁资料,通过地震剖面解释和构造解析等方法对沙井子地区的构造样式进行研究。区内整体构造呈现出由四条近南北向的大型断层呈叠瓦状西倾东冲的构造格局,自西向东逆冲作用逐渐增强,出露地层变老;新生界和白垩系下覆的蓟县系、寒武系、奥陶系主体呈现出与冲断层相协调的构造形态;区域上白垩系广泛不整合覆盖于下伏不同时代地层之上,白垩系沉积前研究区的蓟县系-奥陶系已经作为一个相对独立的构造带存在。结论:沙井子地区的基本构造样式为西倾单向叠瓦状的冲断层组合形式。燕山期平板结构模式下的基底滑脱型单向冲断构造与喜马拉雅期的右旋剪切走滑构造的复合叠加,是沙井子地区现今构造样式形成的基本模式。
To study the structural style and forming mechanism of Shajingzi-Pingliang district on the western margin of Ordos Basin.Using seven sections' tectonic characteristics in the area and drilling data as constraint,based on the gravity data,aeromagnetic data,seismic section interpreting and tectonic analysis to do the research.Result: It is shown that the basic tectonic framework is controlled by the four main imbricate west dip thrust faults which are mainly near NS trending.The obduction enhanced gradually and outcropping strata become older correspondingly from west to east.Different tectonic zone are divided by imbricate-type thrust faults dip toward west,and in coordinately the Jixian-Ordovician formations deformed with the imbricate-type thrust faults dip toward west under the Cenozoic Erathem and Cretaceous formation.Cretaceous formation unconformably onlaps the different formation inferred that the tectonic pattern of Jixian-Ordovician formations has already been an undependent tectonic zone before the Cretaceous deposition.Conclusion the main pattern of the study area is the intrabasement decollement with imbricate-type thrust faults in the original plate structure model in Yanshan movement superimposed with dextral shear slip fault during Himalaya movement.
To study the structural style and forming mechanism of Shajingzi-Pingliang district on the western margin of Ordos Basin.Using seven sections' tectonic characteristics in the area and drilling data as constraint,based on the gravity data,aeromagnetic data,seismic section interpreting and tectonic analysis to do the research.Result: It is shown that the basic tectonic framework is controlled by the four main imbricate west dip thrust faults which are mainly near NS trending.The obduction enhanced gradually and outcropping strata become older correspondingly from west to east.Different tectonic zone are divided by imbricate-type thrust faults dip toward west,and in coordinately the Jixian-Ordovician formations deformed with the imbricate-type thrust faults dip toward west under the Cenozoic Erathem and Cretaceous formation.Cretaceous formation unconformably onlaps the different formation inferred that the tectonic pattern of Jixian-Ordovician formations has already been an undependent tectonic zone before the Cretaceous deposition.Conclusion the main pattern of the study area is the intrabasement decollement with imbricate-type thrust faults in the original plate structure model in Yanshan movement superimposed with dextral shear slip fault during Himalaya movement.
引文
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[12]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[C].∥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.
[13]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.
[14]孙晓猛,吴根耀,郝福江,等.秦岭-大别造山带北部中-新生代逆冲推覆构造期次及时空迁移规律[J].地质科学.2004,39(1):63-76.
[15]杨坤光,李学刚,戴传固,等.断层调整与控制作用下的叠加构造变形:以贵州地区燕山期构造为例[J].地质科技情报.2012,31(5):50-57.
[16]Boyer Steven E.,Elliott D.Thrust system[J].AAPG Bulletin,1982,66(9):1196-1230.
[17]Perry W.J.North American thrust faulted terranes selected papersreprinted from the AAPG Bulletin and other geological journals[J].The American Assocation of Petroleum Geologists,1984,13(2):49-50.
[18]John H.Shaw,Frank Bilotti,Peter A.Brennan.Patterns of Imbri-cate Thrusting[J].Geological Society of America Bulletin,1999,111:1140-1154.
[19]Oscar A.Merino-Tomé,Juan R.Bahamonde,Juan R.Colmenero,et al.Emplacement of the Cuera and Picos de Europa imbricate systemat the core of the Iberian-Armorican arc(Cantabrian zone,northSpain):New precisions concerning the timing of arc closure[J].Geo-logical Society of America Bulletin,2009,121:729-751.
[20]ROGER A.PRINCE,KULM L.D.Crustal rupture and the initia-tion of imbricate thrusting in the Peru-Chile Trench[J].Geolog-ical Society of America Bulletin,1975,86:1639-1653.
[21]Finzi C.Vita,Lin J.-C.Serial reverse and strike slip on imbri-cate faults:The Coastal Range of east Taiwan[J].Geological Socie-ty of America Bulletin,1998,26:279-281.
[22]陈守田,刘招君,刘杰烈.海拉尔盆地构造样式分析[J].吉林大学学报(地球科学版).2005,35(1):39-42.
[23]Lowel J D.Structural Style in Petroleum Exploration[M].Tulsa:Oil and Gas Consultants International Inc,1985.
[24]李智武,刘树根,罗玉宏,等.南大巴山前陆冲断带构造样式及变形机制分析[J].大地构造与成矿学.2006,30(3):294-304.
[25]张政威,陈亚强,张付生,等.焉耆盆地西部逆冲推覆带二维地震采集方法研究[J].河南石油.2005,19(3):14-16.
[26]屈键鹏.鄂尔多斯块体西缘及西南缘深部电性结构与该区地质构造的关系[J].内陆地震.1998,12(4):312-319.
[27]詹艳,赵国辉,王继军.青藏高原东北缘海院弧形构造区地壳电性结构探测研究[J].地震学报.2005,27(4):432-433.
[28]詹艳,赵国辉,王继军.六盘山盆地的大地电磁探测[J].石油地球物理勘探.2004,39(增刊):80-84.
[29]詹艳,陈小斌.宁夏海原大震区西安州-韦州剖面大地电磁探测与研究[J].地球物理学报.2004,47(2):274-282.
[30]McBride John H.,Hatcher Robert D.,Stephenson W.J.,et al.Integrating seismic reflection and geological data and interpretationsacross an internal basement massif:The southern Appalachian PineMountain window,USA[J].Geological Society of America Bulle-tin,2005,117:669-686.
[31]刘弢,等.鄂尔多斯西部前陆盆地综合物探及地震大剖面解释.中石油集团东方地球物理勘探有限责任研究院.内部报告.2003.
[32]刘天佑,吴招才,詹应林.异常小波多尺度分解及危机矿山的深部找矿:以大冶铁矿为例[J].地球科学.2007,32(1):135-140.
[33]何天翼等.鄂尔多斯西部前陆盆地地震资料综合解释.石油大学和中国矿业大学:内部报告.2003.
[34]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.
[2]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.
[3]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.
[4]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.
[5]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.
[6]杨华,陶家庆,欧阳征健,李刚,景春利,鄂尔多斯盆地西缘构造特征及其成因机制[J].西北大学学报(自然科学版).2011,41(5)863-867.
[7]杨俊杰,张伯荣.鄂尔多斯盆地西缘掩冲构造带的基本特征[C].∥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.
[8]杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社.2002.
[9]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.
[10]张抗,吴紫电.鄂尔多斯断块西缘断裂带的构造特征及含油气远景评价[J].石油与天然气地质.1958,6(1):72-81.
[11]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.
[12]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[C].∥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.
[13]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.
[14]孙晓猛,吴根耀,郝福江,等.秦岭-大别造山带北部中-新生代逆冲推覆构造期次及时空迁移规律[J].地质科学.2004,39(1):63-76.
[15]杨坤光,李学刚,戴传固,等.断层调整与控制作用下的叠加构造变形:以贵州地区燕山期构造为例[J].地质科技情报.2012,31(5):50-57.
[16]Boyer Steven E.,Elliott D.Thrust system[J].AAPG Bulletin,1982,66(9):1196-1230.
[17]Perry W.J.North American thrust faulted terranes selected papersreprinted from the AAPG Bulletin and other geological journals[J].The American Assocation of Petroleum Geologists,1984,13(2):49-50.
[18]John H.Shaw,Frank Bilotti,Peter A.Brennan.Patterns of Imbri-cate Thrusting[J].Geological Society of America Bulletin,1999,111:1140-1154.
[19]Oscar A.Merino-Tomé,Juan R.Bahamonde,Juan R.Colmenero,et al.Emplacement of the Cuera and Picos de Europa imbricate systemat the core of the Iberian-Armorican arc(Cantabrian zone,northSpain):New precisions concerning the timing of arc closure[J].Geo-logical Society of America Bulletin,2009,121:729-751.
[20]ROGER A.PRINCE,KULM L.D.Crustal rupture and the initia-tion of imbricate thrusting in the Peru-Chile Trench[J].Geolog-ical Society of America Bulletin,1975,86:1639-1653.
[21]Finzi C.Vita,Lin J.-C.Serial reverse and strike slip on imbri-cate faults:The Coastal Range of east Taiwan[J].Geological Socie-ty of America Bulletin,1998,26:279-281.
[22]陈守田,刘招君,刘杰烈.海拉尔盆地构造样式分析[J].吉林大学学报(地球科学版).2005,35(1):39-42.
[23]Lowel J D.Structural Style in Petroleum Exploration[M].Tulsa:Oil and Gas Consultants International Inc,1985.
[24]李智武,刘树根,罗玉宏,等.南大巴山前陆冲断带构造样式及变形机制分析[J].大地构造与成矿学.2006,30(3):294-304.
[25]张政威,陈亚强,张付生,等.焉耆盆地西部逆冲推覆带二维地震采集方法研究[J].河南石油.2005,19(3):14-16.
[26]屈键鹏.鄂尔多斯块体西缘及西南缘深部电性结构与该区地质构造的关系[J].内陆地震.1998,12(4):312-319.
[27]詹艳,赵国辉,王继军.青藏高原东北缘海院弧形构造区地壳电性结构探测研究[J].地震学报.2005,27(4):432-433.
[28]詹艳,赵国辉,王继军.六盘山盆地的大地电磁探测[J].石油地球物理勘探.2004,39(增刊):80-84.
[29]詹艳,陈小斌.宁夏海原大震区西安州-韦州剖面大地电磁探测与研究[J].地球物理学报.2004,47(2):274-282.
[30]McBride John H.,Hatcher Robert D.,Stephenson W.J.,et al.Integrating seismic reflection and geological data and interpretationsacross an internal basement massif:The southern Appalachian PineMountain window,USA[J].Geological Society of America Bulle-tin,2005,117:669-686.
[31]刘弢,等.鄂尔多斯西部前陆盆地综合物探及地震大剖面解释.中石油集团东方地球物理勘探有限责任研究院.内部报告.2003.
[32]刘天佑,吴招才,詹应林.异常小波多尺度分解及危机矿山的深部找矿:以大冶铁矿为例[J].地球科学.2007,32(1):135-140.
[33]何天翼等.鄂尔多斯西部前陆盆地地震资料综合解释.石油大学和中国矿业大学:内部报告.2003.
[34]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.
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