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根据钻井资料重建地史,为估算基底沉降提供了直接和定量的方法。地史除反映沉积物的堆积速率以及局部和区域性的沉降机制以外,还反映了海平面的升降变化。我们已定量地确定了遍及全球的一组钻井所共有的沉降分量。在补偿了沉积作用对地壳的影响之后,我们找出了全球沉降速率与根据地震地层学解释确定的海平面高度的缓慢变化之间的某些关系。这些结果表明,与先前所用方法无关的基底沉降资料可用来识别海平面的升降变化。但是,由于难以确定和区分与构造沉降和海平面变化无关的岩石圈刚度、热力沉降和沉积物供给等方面的变化,我们还不能确定海平面变化的大小。我们将根据经验所得的沉降曲线与已发表的海平面变化曲线进行了比较,从而避免了应用那些含有我们尚不能定量描述的地壳特性的地质模式。地史分析是研究区域性沉降的一种极为有效的方法因而也是推断区域构造史的有力手段。本文将用北海地质史上的沉降图来说明这一点,
Based on the history of the reconstruction of drilling data, it provides a direct and quantitative method for estimating the settlement of the foundation. In addition to reflecting the deposition rate of sediment and local and regional sedimentation mechanism, but also reflects the sea level changes in lift. We have quantified the subsidence components common to a group of wells all over the world. After compensating for the effect of sedimentation on the crust, we find some relationship between the global sedimentation rate and the slow change of sea-level height determined from the seismic stratigraphic interpretation. These results show that subsidence data unrelated to previous methods can be used to identify sea-level fluctuations. However, due to the difficulty in identifying and distinguishing changes in lithosphere stiffness, thermodynamic subsidence and sediment supply unrelated to structural subsidence and sea-level changes, we have not been able to determine the magnitude of the sea level change. We compare empirically derived subsidence curves with published sea level variations, avoiding the application of geological models that contain crustal features that we can not yet characterize quantitatively. Geo-history analysis is an extremely effective method for studying regional subsidence and thus a powerful tool for inferring the tectonic history of the region. This article will use the sedimentary map of the North Sea geological history to illustrate this point,