鄂尔多斯盆地早侏罗世岩相古地理

采用单因素分析综合作图法,结合大地构造和单剖面相分析,从定量化角度对鄂尔多斯盆地早休罗世富县组岩相古地理进行了研究,认为三叠纪末印支运动使鄂尔多斯盆地抬升,遭受剥蚀,形成起伏不平地势。侏罗纪早期,在相对低凹地区接受沉积,形成了以剥蚀一残积相为主体,冲积、湖沼相为辅的古地理景观,在这一背景上,大面积发育了中休罗世沉积。 

LITHOFACIES PALAEOGEOGRAPHY OF LOWER JURASSIC IN ORDOS BASIN

y use of the single factor analysis and comprehensive plotting method and combining with the geotectonic system and factes analysis of single profile,the lithofacies palaeogeography of Fuxian Formation of Lower Jurassic in Ordos Basin has been analysed quantitatively. It is recognitzed that during the end of Triassic the Ordos Basin is uplifted and denuded by the indosinian movement,forming the rolling topography,and during the Early Jurassic the deposition is occurred in the ralative low-lying area,forming the main palaeogeographic landscape of denuded--eluvial factes .and the auxiliary one of alluvial-limnetic factes,and on this background the large areal Middle Jurassic deposition is developed.