【作者】 邸领军；

【导师】 李文厚；

【作者基本信息】 西北大学 ， 矿物学、岩石学、矿床学， 2003， 博士

【摘要】 论文以板块构造研究的最新地体拼贴理论为指导，以岩系、地层为基础，将沉积与构造分析相结合，并以地层学、岩石学、沉积学、构造地质学、遥感地质学、地球物理学、大地构造学等多学科入手，在充分整理现有资料及前人研究的成果基础上，利用盆地周缘野外露头以及盆地中部分钻井深部取芯资料、地球化学分析资料、地震、非地震等资料将鄂尔多斯盆地置于一个更大的尺度，更深的范畴，讨论了鄂尔多斯盆地及其周缘地区结晶基底与浅层构造之间的关系，探讨了深部地质对盆地盖层的影响，以不与前人雷同的视角对鄂尔多斯盆地基底发育及其盖层中存在的问题提出了新的观点和认识。 文中引用了大量最新的区域地质资料和最新的地层、岩系划分对比资料，对鄂尔多斯盆地结晶基底的岩系分布、形成、演化以及断裂的展布特征进行了描绘，并指出盆地基底与Tg反射层之间的g层是蓟县系官道口群向盆地的延伸，盆地中原划分的长城系、蓟县系地层可以和贺兰山出露的黄旗口组、王全口组对比，亦划归青白口系，从而否定了鄂尔多斯盆地存在滹沱期坳拉谷和盆地中有中元古坳拉谷发育阶段的看法。 沉积与构造分析表明：鄂尔多斯盆地西缘及西南侧的秦岭—祁连山—贺兰山三结合区不存在形成三叉裂谷的地质条件，不可能产生贺兰坳拉谷。因此，盆地中央古隆起的形成原因自然不能用裂谷肩来解释。从沉积厚度分析，中央古隆起的形成应是由盆地西南缘向盆地内延伸的蓟县系官道口群厚层碳酸盐岩引起沉积差异构造。 从秦祁构造活动带的构造形迹分析认为，该构造带是自下元古以来多期挤压环境下形成的火山一沉积压陷，并一期又一期向北蚕食，于奥陶纪中后期形成基本不含火山岩的米钵山组、香山群压陷岩系。压陷北界沿北纬38°带东西向展布，该纬向构造是沿鄂尔多斯盆地中部38°带分布的纬向构造带的一部分，是由地球自转速率变化引起，符合全球协和函数的条件。 通过对盆地西缘青龙山南端小南沟的非地震MT剖面以及横穿贺兰山的地震剖面揭示的构造形态研究认为，盆地西缘一系列推覆体青龙山—罗山—牛首山以至贺兰山是由于鄂尔多斯地块向西推挤同时与阿拉善地块的右行运动所产生的“薄皮构造”。 通过对基底的发育和断裂的研究发现，鄂尔多斯盆地的油气田分布轨迹及三角洲严格受北东向及东西向基底断裂的控制。研究认为，结晶基底在拼贴焊合过程中，其地体拼贴面之间焊合程度较差的界面在后期各阶段的构造活动中，与上覆地层发生祸动。其结果，使基底断裂的上覆地层发生拖曳、走滑、伸展并形成断裂以及由此派生的密集节理带和鼻褶群，这些低幅、小型的构造发育区带则是油气富集区。更多还原

【Abstract】 It is directed by the 1atest theory of terrain stickin Plate Tectonic, and based o n petrographical series and stratum layers. From the aspects of Structural Analysis, Stratigraphy, Petrology, Sedimentology, Structure Geology, Remote sensing Geology, Geophysics as well as Tectonics, the author put the Ordos Basin into a bigger and deeper studying field while using the combination of sedimentation and Structure analyses, the data of outcrops around the basin and the deep drilling coring data in the middle of this basin, geochemistry analysis, seismic methods and non-seismic methods, etc. This paper discussed the relationship between the crystalline basement and the suprastructure in and surrounding the Ordos Basin, and also the influences of deep geology on the basin platform cover, and some new point of view and better understanding have been brought forward on the basement growth of Ordos Basin and it’s platform cover.A large amount of data of the latest regional geoglogy and the latest correlation data of layers and rock formation have been quoted, and a description of distribution of crystalline basement, formation, evolution as well as the distribution characteristic of the fracture belt of Ordos Basin have been made in this paper, and the paper also pointed out that the g-layer which lies between the base of the basin and Tg reflector, is the extension of basinward of Guandaokou of Jixian system. The layer of Changcheng system and Jixian system, which had been divided before, can be correlated with the exposed Huangqikou Group and Wangquankou Group in Helan mountain, and divided into Qingbaikou system. So, the paper denied the viewpoint of the existence of aulacogen in Hutuo period and middle Proterozoic in this basin.Sedimentary and Structure analysis indicated that, in the combined area of three mountains (Qinling-Qilan-Helian) on the west and southwest margin of Ordos Basin, there were no geological condition for the formation of three-armed rift, so it is not likely to form Helan aulacogen, and it is certain that the rift shoulder can not be used to explain the reason for the forming of central paleo-uplift in this basin. Considering the sedimentation thickness, the formation of central paleo-uplift should be differential sedimentary structure caused by the thick layer carbonate deposition of Guandaokou group, Jixian system, which extended from the south-west margin to the inner part of the basin.The analysis of structural movement and expression shows that Qinqi tectonic active area is a volcano-sendimentary compressional depression formed by several times of compression movement from lower Proterozoic, and spreaded in the direction of north step by step till the forming of Xiangshan and Miboshan group in mid-later period ofOrdovician, bearing hardly with volcanical rock. The north border of the basement, extended from west to east along the north latitude 38 , this latitude structure zone is part of the zone in the middle of Ordos Basin along the north latitude 38 , this is caused by the rate of earth rotation, according with the condition of global harmonic function.The study on the structural feature opened out by the non-seismic (MT) profile of Xiaonangou in Qinglong mountain on the west edge of Ordos Basin and the seismic profile across Helan mountain shows that a series of thrust blocks-Qinglong-Luoshan -Nioushou-Helan mountain, were the thin-skin structure formed by the westward compression of Ordos Block and the dextral shear of Alashan Block.From the studying on the growing process of the basement and the spreading of the fracture belt, the research discovered that the distribution spreading expression of the oil-gas and the delta in Ordos Basin were strictly controlled by the basement fracture belt extended in the direction of north-east and east-west. And during each period of the process of the crystalline basement stick, the interface with relatively bad welding had coupled movement with the overlying layer. As a result, the overlying layer happen to be dip-slip drag更多还原