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松嫩平原湖泊发育新构造的研究
The reseach on new tectonics of lake development in Songnen plain
【摘要】 松嫩平原为长期沉降的断陷构造平原.北北东、北西和东西向发育的断裂构造控制着湖泊发育的空间格局,形成断阳湖盆.东升西降的掀斜运动机制,使湖泊群集中分布在平原区的西部,并造成湖岸地貌发育的不对称.第三纪以来,沉降中心的迁移,控制了松嫩平原湖泊发育的历史.
【Abstract】 There are three groups fracture tectonics which direct along NNE, NW and EW in Songnen plain. Not only can fault tectonics form fault basin, but also their intersection can control the space pattern of lakes, and provide tectonic base for the lakes formed by deflation and other external force process. The tilt movment which make the eastern plain rise and the west drop make the lake groups concerntrate on the west. The Nenjiang river migrate from east to west controlled by the tilt motion stage can take advantage of lakes development. The lake water of closed basin tend to the west, so the western bank is eroded, the shoal of the eastern bank is wide. The tectonic rise in the south and north make above process more com- plicated. Since the Tertiary period, that the depocentre and subsidence axis migrate for many times control the history of lakes development in Songnen plain. At present, the subsidence axis stretch along Nenjiang river, the depocentre is on the Da’an, many bigger and middle lakes are distributed along the axis, the biggest lake of the plain area is also on here.
- 【文献出处】 东北师大学报(自然科学版) ,Journal of Northeast Normal University (Natural Science Edition) , 编辑部邮箱 ,2000年02期
- 【被引频次】8
- 【下载频次】222