摘要
鄂尔多斯地块西缘科学山地区侏罗系地层发育典型的区域性叠加褶皱,记录鄂尔多斯地块西缘中生代以来主要构造演化过程。在区域性构造分析的基础上,通过野外构造解析,确定了两期构造缩短变形过程;同时运用层间滑动断层运动学分析,结合构造筛分,获得两期同构造缩短变形的挤压构造应力场;综合区域构造与构造年代学,提出科学山地区晚中生代以来两期构造演化过程。中—晚侏罗世(J_2—J_3)受NW—SE向构造挤压作用控制,鄂尔多斯地块西缘科学山地区发生NW—SE向构造缩短变形,形成NE—SW向的褶皱构造与相关的逆冲断层,同时控制了中—上侏罗统沉积。这期构造缩短变形可能是西伯利亚板块向南汇聚与太平洋板块NW向俯冲联合作用的结果。中新世晚期—上新世晚期(N■—N_2)挤压构造应力场转变为NE—SW向构造挤压,导致NW—SE向褶皱构造发育,并叠加在早期NE—SW向构造之上,形成区域性叠加褶皱。区域构造分析表明,这期构造缩短变形是青藏高原NE向扩展的构造响应。上述研究为重建鄂尔多斯地块西缘陆内变形过程提供了重要证据。
Kexueshan area in the western periphery of Ordos block is characteristic of typical regional superimposed folds in Jurassic strata, documenting the main tectonic evolution process since Mesozoic in the western periphery of Ordos block. On the basis of regional structural analysis, the two-phase structural shortening deformation processes in this area were determined by field structural investigation. Meantime, the two-phase tectonic stress fields related to the structural shortening deformation were reconstructed by using fault kinematic analysis in Kexueshan area, together with structural sieving. Synthesizing the regional structural analysis and geochronology, two stages of tectonic evolution were proposed since Late Mesozoic in Kexueshan area. During Middle-Late Jurassic(J_2-J_3), under the control of NW-SE trending tectonic compression, the NW-SE structural shortening deformation occurs in Kexueshan area, which forms the NE-SW trending folds and thrust faults, and controls the Middle-Late Jurassic deposits. This structural shortening deformation is likely liked with a combination of the southward convergence of the Siberian plate and the northwestward subduction of the Pacific plate. During Late Miocene-Late Pliocene(N■-N_2), the tectonic stress field is transformed into NE-SW trending tectonic compression, resulting in the development of the NW-SE trending folds, which are superimposed on the early NE-SW trending folds, and featured by regional superimposed folds. Regional structural investigation shows that this structural shortening deformation coincides with the northeastward growth of Qinghai-Tibet Plateau. The above studies provide important evidence for the reconstruction of the intracontinental deformation process in the western periphery of Ordos block.
引文
[1] 黄汲清.中国大地构造的几个问题[J].石油实验地质,1983,5(3):165-169.HUANG Ji-qing.Problems on the Tectonics of China[J].Petroleum Geology and Experiment,1983,5(3):165-169.
[2] 马杏垣,游振东,谭应佳,等.中国大地构造的几个基本问题[J].地质学报,1961,41(1):30-44.MA Xing-yuan,YOU Zhen-dong,TAN Ying-jia,et al.Several Basic Problems on the Tectonics of China[J].Acta Geologica Sinica,1961,41(1):30-44.
[3] 李四光.旋卷构造及其它有关中国西北大地构造体系复合问题[J].地质学报,1954,34(4):339-410.LI Si-guang.Vortex Structure and Other Problems Relating to the Compounding of Geotectonic Systems of Northwestern China[J].Acta Geologica Sinica,1954,34(4):339-410.
[4] 张抗.论贺兰裂堑[M]//内蒙古石油学会.鄂尔多斯盆地西缘地区石油地质论文集.呼和浩特:内蒙古人民出版社,1983:29-40.ZHANG Kang.Discussion on Helan-Graben[M]//Inner Mongolia Petroleum Society.Proceedings of Petroleum Geology in the Western Margin of the Ordos Basin.Hohhot:Inner Mongolia People's Publishing House,1983:29-40.
[5] 张抗.鄂尔多斯断块构造和资源[M].西安:陕西科学技术出版社,1989.ZHANG Kang.Ordos Fault Block Structure and Resources[M].Xi'an:Shaanxi Science and Technology Press,1989.
[6] 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.TANG Xi-yuan,GUO Zhong-ming,WANG Ding-yi.The Characteristics and Evolution of the Thrust Nappe Tectonic Belt and Its Petroleum Potential in the West Ordos Basin[J].Oil and Gas Geology,1988,9(1):1-10.
[7] 陈发景.我国含油气盆地的类型、构造演化和油气分布[J].地球科学,1986,11(3):7-16.CHENG Fa-jing.Types,Tectonic Evolution and Hydrocarbon Occurrence of Petroliferous Basins of China[J].Earth Science,1986,11(3):7-16.
[8] 刘和甫,汪泽成,熊宝贤,等.中国中西部中、新生代前陆盆地与挤压造山带耦合分析[J].地学前缘,2000,7(3):55-72.LIU He-fu,WANG Ze-cheng,XIONG Bao-xian,et al.Coupling Analysis of Mesozoic-Cenozoic Foreland Basin and Mountain System in Central and Western China[J].Earth Science Frontiers,2000,7(3):55-72.
[9] 杨振宇,袁伟,仝亚博,等.阿拉善地块前中生代构造归属的新认识[J].地球学报,2014,35(6):673-681.YANG Zhen-yu,YUAN Wei,TONG Ya-bo,et al.Tectonic Affinity Reconnaissance of the Alxa Block in the Pre-Mesozoic[J].Acta Geoscientia Sinica,2014,35(6):673-681.
[10] YUAN W,YANG Z Y.The Alashan Terrane Was Not Part of North China by the Late Devonian:Evidence from Detrital Zircon U-Pb Geochronology and Hf Isotopes[J].Gondwana Research,2015,27(3):1270-1282.
[11] LIU S F,SU S,ZHANG G W.Early Mesozoic Basin Development in North China:Indications of Cratonic Deformation[J].Journal of Asian Earth Sciences,2013,62:221-236.
[12] YUE Q Z,MERCIER J L,VERGELY P.Extension in the Rift Systems Around the Ordos(China),and Its Contribution to the Extrusion Tectonics of South China with Respect to Gobi-Mongolia[J].Tectonophysics,1998,285(1):41-75.
[13] LIU X B,SHI W,HU J M,et al.Magnetostratigraphy of Paleogene-Neogene Sediments in the Yinchuan Basin,Northwestern China[J].Journal of Asian Earth Sciences,2019,DOI:10.1016/j.jseaes.2019.01.016.
[14] 刘少峰,柯爱蓉,吴丽云,等.鄂尔多斯西南缘前陆盆地沉积物物源分析及其构造意义[J].沉积学报,1997,15(1):156-160.LIU Shao-feng,KE Ai-rong,WU Li-yun,et al.Sediment Provenance Analysis and Its Tectonic Significance in the Foreland Basin of the Ordos Southwestern Margin[J].Acta Sedimentologica Sinica,1997,15(1):156-160.
[15] 赵红格.鄂尔多斯盆地西部构造特征及演化[D].西安:西北大学,2003.ZHAO Hong-ge.Structural Characteristics and the Evolution in Western Ordos Basin[D].Xi'an:Northwest University,2003.
[16] 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.LIU Chi-yang,ZHAO Hong-ge,WANG Feng,et al.Attributes of the Mesozoic Structure on the West Margin of the Ordos Basin[J].Acta Geologica Sinica,2005,79(6):737-747.
[17] 刘池洋,赵红格,桂小军,等.鄂尔多斯盆地演化-改造的时空坐标及其成藏(矿)响应[J].地质学报,2006,80(5):617-638.LIU Chi-yang,ZHAO Hong-ge,GUI Xiao-jun,et al.Space-time Coordinate of the Evolution and Reformation and Mineralization Response in Ordos Basin[J].Acta Geologica Sinica,2006,80(5):617-638.
[18] 王锋,刘池洋,赵红格,等.贺兰山盆地与鄂尔多斯盆地的关系[J].石油学报,2006,27(4):15-17.WANG Feng,LIU Chi-yang,ZHAO Hong-ge,et al.Relationship Between Helanshan Basin and Ordos Basin[J].Acta Petrolei Sinica,2006,27(4):15-17.
[19] DARBY B J,RITTS B D.Mesozoic Contractional Deformation in the Middle of the Asian Tectonic Collage:The Intraplate Western Ordos Fold-thrust Belt,China[J].Earth and Planetary Science Letters,2002,205(1/2):13-24.
[20] 张家声,何自新,费安琪,等.鄂尔多斯西缘北段大型陆缘逆冲推覆体系[J].地质科学,2008,43(2):251-281.ZHANG Jia-sheng,HE Zi-xin,FEI An-qi,et al.Epicontinental Mega Thrust and Nappe System at North Segment of the Western Rim of the Ordos Block[J].Chinese Journal of Geology,2008,43(2):251-281.
[21] HUANG X F,SHI W,CHEN P,et al.Superposed Deformation in the Helanshan Structural Belt:Implications for Mesozoic Intracontinental Deformation of the North China Plate[J].Journal of Asian Earth Sciences,2015,114:140-154.
[22] WANG Y C,DONG S W,SHI W,et al.The Jurassic Structural Evolution of the Western Daqingshan Area,Eastern Yinshan Belt,North China[J].International Geology Review,2017,59(15):1-23.
[23] 王永超,董树文,陈宣华,等.内蒙古大青山侏罗纪生长地层对燕山运动“绪动”的制约[J].科学通报,2017,62(12):1274-1277.WANG Yong-chao,DONG Shu-wen,CHEN Xuan-hua,et al.New Time Constraint on the Initiation of Yanshan Movement from Jurassic Growth Strata in the Daqingshan Area,Inner Mongolia[J].Chinese Science Bulletin,2017,62(12):1274-1277.
[24] 施炜,董树文,黄兴富,等.东亚大陆西缘侏罗纪变形:以班公湖—怒江带中段韧性变形为例[J].地质力学学报,2017,23(4):515-525.SHI Wei,DONG Shu-wen,HUANG Xing-fu,et al.Jurassic Deformation at the Western Margin of the East Asia Continent:A Case Study of Ductile Deforma-tion in the Central Segment of the Bangong Lake-Nujiang Belt[J].Journal of Geomechanics,2017,23(4):515-525.
[25] 赵俊峰,刘池洋,喻林,等.鄂尔多斯盆地中侏罗世直罗—安定期沉积构造特征[J].石油与天然气地质,2006,27(2):159-166.ZHAO Jun-feng,LIU Chi-yang,YU Lin,et al.Sedimentary Tectonic Features of Ordos Basin in Middle Jurassic Zhiluo-Anding Stages[J].Oil and Gas Geology,2006,27(2):159-166.
[26] 宁夏回族自治区地质环境监测总站.银川市幅地质图说明书(1∶250 000)[R].银川:宁夏回族自治区地质环境监测总站,2008.Ningxia Hui Autonomous Region Geological Environment Monitoring Station.Geological Map Manual of Yinchuan City(1∶250 000)[R].Yinchuan:Ningxia Hui Autonomous Region Geological Environment Monitoring Station,2008.
[27] 宁夏回族自治区地质调查院.中国区域地质志:宁夏志[M].北京:地质出版社,2017.Ningxia Hui Autonomous Region Geological Survey Institute.Regional Geology of China:Ningxia[M].Beijing:Geological Publishing House,2017.
[28] 李清河,郭守年,吕德徽.鄂尔多斯西缘与西南缘深部结构与构造[M].北京:地震出版社,1999.LI Qing-he,GUO Shou-nian,LU De-hui.Deep Structure and Structure of the Western and Southwestern Margins of Ordos[M].Beijing:Seismological Press,1999.
[29] 白生明,吕昌国.贺兰山南段大战场花岗闪长岩体特征及时代[J].宁夏工程技术,2009,8(3):282-286.BAI Sheng-ming,LU Chang-guo.The Characteristics and Age of South Section of Helanshan Dazhanchang Granodiorite[J].Ningxia Engingeering Technology,2009,8(3):282-286.
[30] ZHANG Y Q,DONG S W,SHI W.Cretaceous Deformation History of the Tan-Lu Fault Zone in Shandong Province,Eastern China[J].Journal of Geodynamics,2003,363(3):243-258.
[31] ZHANG Y Q,MA Y S,YANG N,et al.Cenozoic Extensional Stress Evolution in North China[J].Journal of Geodynamics,2003,36(5):591-613.
[32] 施炜,董树文,胡健民,等.大巴山前陆西段叠加构造变形分析及其构造应力场特征[J].地质学报,2007,81(10):1314-1327.SHI Wei,DONG Shu-wen,HU Jian-min,et al.An Analysis of Superposed Deformation and Tectonic Stress Fields of the Western Segment of Daba Mountains Foreland[J].Acta Geologica Sinica,2007,81(10):1314-1327.
[33] SHI W,ZHANG Y Q,DONG S W,et al.Intracontinental Dabashan Orocline,Southwestern Qinling,Central China[J].Journal of Asian Earth Sciences,2012,46:20-38.
[34] SHI W,DONG S W,LI J H,et al.Formation of the Moping Dome in the Xuefengshan Orocline,Central China and Its Tectonic Significance[J].Acta Geologica Sinica(English Edition),2013,87(3):720-729.
[35] SHI W,DONG S W,RATSCHBACHER L,et al.Meso-Cenozoic Tectonic Evolution of the Dangyang Basin,North-central Yangtze Craton,Central China[J].International Geology Review,2013,55(3):382-396.
[36] SHI W,DONG S W,YUAN L,et al.Cenozoic Tectonic Evolution of the South Ningxia Region,Northeastern Tibetan Plateau Inferred from New Structural Investigations and Fault Kinematic Analyses[J].Tectonophysics,2015,649:139-164.
[37] SHI W,DONG S W,ZHANG Y Q,et al.The Typical Large-scale Superposed Folds in the Central South China:Implications for Mesozoic Intracontinental Deformation of the South China Block[J].Tectonophy-sics,2015,664:50-66.
[38] RAMSAY J G.The Techniques of Modern Structural Geology:Ⅱ.Folds and Fractures[M].London:Academic Press,1987.
[39] 宋鸿林,张长厚,王根厚.构造地质学[M].北京:地质出版社,2013.SONG Hong-lin,ZHANG Chang-hou,WANG Gen-hou.Structural Geology[M].Beijing:Geological Publishing House,2013.
[40] 陈虹,胡健民,公王斌,等.青藏高原东北缘牛首山—罗山断裂带新生代构造变形与演化[J].地学前缘,2013,20(4):18-35.CHEN Hong,HU Jian-min,GONG Wang-bin,et al.Cenozoic Deformation and Evolution of the Niushoushan-Luoshan Fault Zone in the Northeast Margin of the Tibet Plateau[J].Earth Science Frontiers,2013,20(4):18-35.
[41] 公王斌,施炜,陈虹,等.牛首山—罗山断裂带北段柳木高断裂第四纪活动特征[J].地质力学学报,2016,22(4):1004-1014.GONG Wang-bin,SHI Wei,CHEN Hong,et al.Quaternary Active Characteristics of the Liumugao Fault in the Northern Segment of the Niushoushan-Luoshan Fault[J].Journal of Geomechanics,2016,22(4):1004-1014.
[42] 张岳桥,施炜,廖昌珍,等.鄂尔多斯盆地周边断裂运动学分析与晚中生代构造应力体制转换[J].地质学报,2006,80(5):639-647.ZHANG Yue-qiao,SHI Wei,LIAO Chang-zhen,et al.Fault Kinematic Analysis and Change in Late Mesozoic Tectonic Stress Regimes in the Peripheral Zones of the Ordos Basin,North China[J].Acta Geologica Sinica,2006,80(5):639-647.
[43] 张岳桥,廖昌珍,施炜,等.论鄂尔多斯盆地及其周缘侏罗纪变形[J].地学前缘,2007,14(2):182-196.ZHANG Yue-qiao,LIAO Chang-zhen,SHI Wei,et al.On the Jurassic Deformation in and Around the Ordos Basin,North China[J].Earth Science Frontiers,2007,14(2):182-196.
[44] 刘少峰.鄂尔多斯盆地西缘中生代构造地层分析及动力机制研究[D].武汉:中国地质大学,1994.LIU Shao-feng.Mesozoic Tectonic Stratigraphic Analysis and Dynamic Mechanism of the Western Margin of the Ordos Basin[D].Wuhan:China University of Geosciences,1994.
[45] 刘少峰,杨士恭.鄂尔多斯盆地西缘具限制性边界的侧向挤出构造[J].中国区域地质,1996(4):353-360.LIU Shao-feng,YANG Shi-gong.Lateral Extrusion Tectonics with Restricted Boundaries on the Western Margin of the Ordos Basin[J].Regional Geology of China,1996(4):353-360.
[46] 张岳桥,董树文,赵越,等.华北侏罗纪大地构造:综评与新认识[J].地质学报,2007,81(11):1462-1480.ZHANG Yue-qiao,DONG Shu-wen,ZHAO Yue,et al.Jurassic Tectonics of North China:A Synthetic View[J].Acta Geologica Sinica,2007,81(11):1462-1480.
[47] 董树文,张岳桥,龙长兴,等.中国侏罗纪构造变革与燕山运动新诠释[J].地质学报,2007,81(11):1449-1461.DONG Shu-wen,ZHANG Yue-qiao,LONG Chang-xing,et al.Jurassic Tectonic Revolution in China and New Interpretation of the Yanshan Movement[J].Acta Geologica Sinica,2007,81(11):1449-1461.
[48] 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.LIU Shao-feng,YANG Shi-gong.The Differences Between the Southwestern and the Northwestern Ordos Basin and Their Forming Mechanism[J].Chinese Journal of Geology,1997,32(3):397-408.
[49] 施炜,张岳桥,马寅生.六盘山两侧晚新生代红黏土高程分布及其新构造意义[J].海洋地质与第四纪地质,2006,26(5):123-130.SHI Wei,ZHANG Yue-qiao,MA Yin-sheng.Elevation Distribution Pattern of Red Clay Beds in the Regions East and West of Liupanshan and Neotectonic Significance[J].Marine Geology and Quaternary Geo-logy,2006,26(5):123-130.
[50] 施炜,刘源,刘洋,等.青藏高原东北缘海原断裂带新生代构造演化[J].地学前缘,2013,20(4):1-17.SHI Wei,LIU Yuan,LIU Yang,et al.Cenozoic Evolution of the Haiyuan Fault Zone in the Northeast Margin of the Tibetan Plateau[J].Earth Science Frontiers,2013,20(4):1-17.
[51] WANG W T,ZHANG P Z,KIRBY E,et al.A Revised Chronology for Tertiary Sedimentation in the Sikouzi Basin:Implications for the Tectonic Evolution of the Northeastern Corner of the Tibetan Plateau[J].Tectonophysics,2011,505(1/2/3/4):100-114.
[52] 张培震,郑德文,尹功明,等.有关青藏高原东北缘晚新生代扩展与隆升的讨论[J].第四纪研究,2006,26(1):5-13.ZHANG Pei-zhen,ZHENG De-wen,YIN Gong-ming,et al.Discussion on Late Cenozoic Growth and Rise of Northeastern Margin of the Tibetan Plateau[J].Quaternary Sciences,2006,26(1):5-13.
[53] 张进,马宗晋,任文军.宁夏中南部新生界沉积特征及其与青藏高原演化的关系[J].地质学报,2005,79(6):757-773.ZHANG Jin,MA Zong-jin,REN Wen-jun.The Sedimentary Characteristics of Cenozoic Strata in Central and Southern Ningxia and Their Relationships with the Development of the Qinghai-Tibetan Plateau[J].Acta Geologica Sinica,2005,79(6):757-773.
[54] CHEN H,HU J M,GONG W B,et al.Characteristics and Transition Mechanism of Late Cenozoic Structural Deformation Within the Niushoushan-Luoshan Fault Zone at the Northeastern Margin of the Tibetan Plateau[J].Journal of Asian Earth Sciences,2015,114:73-88.
[55] 施炜,陈虹,李振宏,等.新构造-活动构造区填图技术方法初析[J].地质力学学报,2016,22(4):856-867.SHI Wei,CHEN Hong,LI Zhen-hong,et al.Regional Geologic Investigation Methods in Neotectonic and Active Tectonic Area[J].Journal of Geomechanics,2016,22(4):856-867.