厚覆盖区1：25万区域地质调查工作方法研究

通过1：25万杭州市幅厚覆盖区第四纪研究和填图实践，初步总结出“以气候旋回及基准面旋回等时性理论为基础，从古气候旋回宏观识别标志研究人手，以标准孔为基准点外延扩展，在反复认识与验证的基础上，进行层序地层划分，建立剖面等时格架，制作高精度对比的剖面图及准瞬时岩相古地理图”的研究方法，以及“从古岸线沉积物研究人手，充分运用非正式岩石地层单位的表示方法，结合考古及地方志，填绘出具岩石空间分布、海平面升降信息、古文化遗址、浅表含水层展布及河流与海岸线变迁”的非常规填图方法。提高了本区第四纪地层研究精度，使地质图具有强烈的地区特色。拓宽了区调工作的服务领域。并为沿海厚覆盖区的区域地质调查另辟了一条新思路。

Methodological study of the heavy-cover areain 1:250000 regional geological survey

Through Quaternary study and geological mapping in the heavy-cover area of the 1:250000 Hangzhou Chart, it has been proved to be an effectual surveying channel to make both the section map for regional high-resolution contrast and quasi-instantaneous facies palaeogeographic map. The authors also suggest unconventional mapping method, which contains spatial rock distribution, sea-level elevation and subsidence information, ancient culture sites, shallow water-bearing strata, and variations of rivers and coastlines. In this way, our work provides a new means for regional geological surveys in furture in the coastal heavy-cover areas.