摘要
沉积盆地发育过程中，沉降是盆地沉积充填的最基本条件，也是盆地发育的基础。本文所论述的西湖、基隆两凹陷之间的鞍部是东海陆架盆地重要的构造演化带。运用盆地沉降模拟原理，提出以构造沉降比重和相对沉降的概念进行系统分析。通过沉降模拟得出鞍部地区的盆地沉降具有时间及地域上的不均衡性特点，且有构造高点随时间迁移的趋势。进一步分析可见构造沉降比重值的大小与盆地发展演化阶段密切相关。
Subsidence is the most basic condition to control sedimentation and basin formation. The structure saddle between the depressions of Xihu and Jilong is a very important area in the development of the period of tertiary in the Doughal Basin.The subsidence history of this area is analysed with the principle of basin modelling and the first using of the concept of specific starved subsidence. A new concept of relative subsidence is advanced in this paper also, though it cannot be quantitated in the subsidence analysis in the researched area. It shows that the subsidence of the area is of unbalance in both geography and basin stages. The values of specific starved subsidence have close relationship to the developed stageS of the basin.
基金
国家自然科学基金
关键词
盆地沉降
相对沉降
沉降模拟
沉降分析
Subsidence
relative subsidence
specific starved subsidence
basinmodelling
