杭州城市第四系三维地质结构模型建立中的孔间地层对比方法分析

构建地质结构模型是正在开展的杭州城市地质调查工作的主要内容之一,精确模型的建立基于孔间地层的精确对比。因此,确定适合该地区的地层对比方法成为一个非常重要的课题。笔者对传统对比方法及1:25万杭州市幅第四纪地层高精度对比方法进行了分析,根据高分辨率层序地层学理论和对比准则,结合杭嘉湖平原位处河口地区的沉积特点,拟定了适合杭州第四系钻孔间地(岩)层对比的新方法。

Analysis of the correlation method of inter-borehole strata for the construction of a Quaternary 3D geological configuration model of Hangzhou City

The construction of a 3D geological configuration model is one of the main contents of urban geological investigations that are being carried out in Hangzhou City. The construction of an accurate model mainly depends on the accurate inter-borehole stratigraphic correlation;so it is a very important subject to determine an appropriate stratigraphic correlation method suitable to local areas. In this paper, an analysis is made on the traditional correlation method and the method of high-resolution stratigraphic correlation of the Quaternary used in the 1:250000 regional geological mapping of the Hangzhou City Sheet. According to the theory of high-resolution sequence stratigraphy and criteria of correlation, combined with the sedimentary characteristics of the estuary area where the Hangzhou-Jiaxing-Huzhou plain is located, a new inter-borehole Quaternary stratigraphic (rock) correlation method suitable to this area is put forward.