中文摘要：

地层抬升剥蚀是沉积盆地中普遍存在的现象。地层剥蚀厚度的准确恢复对正确重建沉积盆地原始沉积-构造演化史,热史及油气生、排、运、聚史和定量评价油气资源潜力至关重要。本次研究在充分结合南黄海北部盆地东北凹陷区域构造和演化特征研究的基础之上,依据东北凹陷实际地质情况和资料条件,选取参考层厚度变化率法和沉积速率法,对东北凹陷始新统戴南组和三垛组地层的剥蚀厚度进行了定量恢复。结果表明,渐新世末的三垛运动使东北凹陷内始新统戴南组和三垛组地层遭受强烈的剥蚀改造,戴南组和三垛组地层在凹陷内各个构造带表现出不同的剥蚀响应特征。

英文摘要：

The uplift and erosion of strata are ubiquitous in sedimentary basins. Restoring exact thickness of the erosion is very important to rebuild rationally the histories of initial deposition-tectonic evolution, geothermal, hydrocarbon generation, expulsion, migration and accumulation, and also to evaluate accu- rately the potential of oil and natural gas resources. On the basis of researches on tectonic evolution in northeast depression of the South Yellow Sea basin and according to practical geological conditions and present information, the method for thickness variance ratio of reference layer and sedimentation rate was applied to the eroded thickness restoration of Eocene Dainan formation and Sanduo formation in northeast depression. The final result suggested that the Sanduo tectonic movement which occurred at the last stage of Eocene, resulted in the intense erosion of Eocene Dainan formation and Sanduo formation,and these two formations indicate distinct characteristics in different tectonic zones of the northeast depression.