Analysis Of Tectonic Landform In The Eastern And Western Flank Of Ordos Plateau And Its Neotectonic Significance

The unique tectonic landform including Shanxi-Shaanxi Gorge and Liupan Mountains developed respectively in the eastern and western flank of Ordos Plateau. Since the Late Cenozoic, because of the fast northward growth and episodic eastward extrusion of Tibetan Plateau, neotectonic movement in the study area is more intense, resulting in mountains uplifting rapidly, rivers incising strongly, and subsequently the present landforms forming. The landforms evolution in the eastern and western flank of Ordos Plateau documents united due to on n during Late Cenozoic. To do research on the tectonic landform in the two flanks of Ordos Plateau is benifical not only to reveal the morpho-tectonic characteristics in the area, but also to find its differentia and the development history of Huanghe Rvier, as well as provide geology to study Qinghai-Tibet Plateau, and research on blocks interaction.Using the Remote Sensing and the Digital Elevation Model, and combined with field observation, this paper analyses detailedly tectonic landform in the eastern and western fanks of Ordos Plateau, and obtained lots of quantitative parameters of landform in the study area, and discusses its cause of formation, neotectonic implication and dynamics.On the one hand, using RS and DEM technique and combined with field observation,this paper have discussed the features of arc-shape tectonics landform of Liupan Mountains by the marker which is the Late Cenozoic red clay bed distributed wide spreadly in the northeastern region of Qinghai-Tibet Plateau. The Late Cenozoic red clay bed, not only records Late Cenozoic climatic and environmental changes,but also provides indication for neotectonics of Qinghai-Tibet Plateau. This paper above all analyses quantitively elevation distribution characteristics of red clay bed in the both sides of Liupan Mountains. Then, combing with previous data and sedimentary features of red clay, the paper proposes several phases of strong differential uplifts occurred in the both sides of Liupan Mountains since the Middle Miocene when The red clay began to deposit in the western region of Liupan Mountains (the Longxi area),...