冀中饶阳凹陷第四纪沉积环境演化

Study on Quaternary sedimentary environment evolution of Raoyang sag in Central Hebei province

冀中饶阳凹陷第四纪沉积环境演化具有明显的继承性,古沉积背景对其具有深远的影响意义。在古近纪、新近纪湖盆演化的基础之上,饶阳凹陷第四纪沉积充填过程中的沉积物物源主要来自西部,其次为西北、西南和东北方向,古滹沱河、古唐河、古漕河是沉积物的主要搬运介质。古近纪和新近纪发育的河流-湖泊沉积体系依然控制着整个研究区,主要发育四种沉积相类型,分别为冲(洪)积扇相、河流相、(扇)三角洲相和湖泊相。在第四纪沉积环境演化过程中,构造运动、气候变化(冰期的演化)、海平面升降等因素共同制约着不同时期的沉积环境演化。

The Quaternary sedimentary environment evolution of Raoyang sag in Central Hebei province is obviously of inheritance and the ancient sedimentary background is of profound impact on it.On the basis of lacustrine basin evolution in paleogene and neogene period,the Quaternary sedimentary sediment provenance comes mainly from the west,next to the northwest,southwest and northeast.The ancient Hutuo river,the ancient Tanghe river and the ancient Caohe river acted as the main medium in sediment transport.The river developed in the process of Paleogene and Neogene,and the lacustrine depositional system still controls the whole study area,and mainly developed four types of sedimentary facie,respectively for blunt(flood)fan facie,fluvial facie,(fan)delta facie and lacustrine facie.In the process of the quaternary sedimentary environment evolution,tectonic movement,climate change(the evolution of the ice age),sealevel change,and etc jointly restrict the evolution of sedimentary environment in different periods.