晚中生代—新生代构造体制转换与鄂尔多斯盆地改造
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国家重点基础研究发展计划(973计划)项目(2003CB214604)资助。


Transition of the Late Mesozoic–Cenozoic tectonic regimes and modification of the Ordos basin
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    摘要:

    提要:鄂尔多斯盆地是叠加在华北古生代克拉通台地之上的中生代大型陆内盆地。晚中生代—新生代是鄂尔多斯盆地重要的改造阶段,区域构造体制经历了重大转换,在盆地周缘形成不同方向和不同样式的构造带。其中发生在中、晚侏罗世时期的燕山运动主幕,对鄂尔多斯盆地的定型和发展具有划时代意义,这期构造变动导致鄂尔多斯盆地周缘挤压逆冲构造带的形成。早白垩世时期,对区域构造应力体制转换的响应,鄂尔多斯盆地处于弱引张构造环境,引张构造变形主要集中在盆地西南缘地带,六盘山古地堑发育。新生代时期,构造变形主要发生在鄂尔多斯盆地周缘,形成一系列地堑盆地。晚中新世或上新世以来的新构造运动时期,受到青藏高原快速隆升和向东构造挤出作用的影响,鄂尔多斯盆地西南缘六盘山褶皱带快速崛起,而在盆地的其他周边地带则发生引张变形和地块差异性升降。最后,笔者论述了不同构造应力体制下盆地的改造作用,讨论了鄂尔多斯盆地研究中的一些基础地质构造问题。

    Abstract:

    Abstract:The Ordos basin is a large Mesozoic intracontinental basin superimposed on the Paleozoic North China craton. The Late Mesozoic-Cenozoic were an important modification period of the basin, during which significant changes in tectonic regimes occurred and tectonic belts of different trends and styles were formed around the basin. The main phase of the Yanshanian movement that took place during the Mid-Late Jurassic is of great significance for the shaping and development of the Ordos basin. Compressive tectonic belts surrounding the Ordos basin were mostly formed during this Yanshanian phase. During the Early Cretaceous, in response to the tectonic stress regime transition, the Ordos basin was subjected to week extension, and extensional deformation was localized along its SW margin, resulting in the development of the Liupanshan paleo-graben. During the Cenozoic, tectonic deformation mainly occurred around the Ordos basin, resulting in the formation of the grabens. During the Neotectonic movement since the late Miocene or early Pliocene, owing to the influence of the rapid uplift of the Qinghai-Tibet Plateau and its eastward extrusion, the Liupanshan fold belt on the southwestern margin of the Ordos rose rapidly, while extensional deformation and differential uplift and subsidence of the blocks took place in other peripheral zones of the basin. Finally, the paper discusses the basin modification in different tectonic stress regimes and some basic tectonic problems in the study of the Ordos basin.

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张岳桥 廖昌珍. 晚中生代—新生代构造体制转换与鄂尔多斯盆地改造[J]. 中国地质, 2006, 33(1): 28-40.
ZHANG Yue-qiao, LIAO Chang-zhen. Transition of the Late Mesozoic–Cenozoic tectonic regimes and modification of the Ordos basin[J]. Geology in China, 2006, 33(1): 28-40(in Chinese with English abstract).

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