冲-洪积平原1∶5万区域地质调查技术方法探索

Exploration of the technology and method of 1∶50000 regional geological survey in proluvial and alluvial plain

首都地区规划建设工作主要分布于平原松散地层之上,第四纪地质研究显得尤为重要。依托近几年来在北京地区开展的平原覆盖区1∶5万区域地质调查和活动断裂专项调查项目成果,系统总结了平原区第四纪区域地质调查与评价的主要工作手段和技术方法,及其在解决第四纪基础地质问题及生态环境中所起的作用。通过平原区区域地质调查工作,可查明第四纪精细地质结构、含水层分布特征,精确厘定活动断裂位置及其活动时限,探讨自然环境演化序列与人类活动关系等,为城市规划、重大工程建设和应急水源地水资源合理开采提供基础地学数据。研究成果对首都城市减灾防灾、生态环境演变研究具有重要地学支撑作用。

Planning and construction work in the capital area is mainly distributed on the loose strata of the Beijing Plain,therefore,the study of Quaternary geology is particularly important.According to the 1∶50000 regional geological survey and special investigation of active faults in the Beijing Plain,the author has systematically summarized the main methods and techniques of Quaternary regional geological survey and evaluation,and the effects in solving the basic geological,ecological and environmental problems in the Quaternary.The fine geological structure of the Quaternary,distribution characteristics of aquifers,the active fault location and active time limit were accurately determined,and the evolution sequence of natural environment and human activities were discussed through regional geological survey in Beijing Plain,which also provide basis for city planning,key project construction and exploitation of water resources in emergency water sources.The results also provide important geological support for disaster reduction and prevention and research on ecological environment in evolution the capital city.