北京张坊地区岩溶地下水运移富集的构造控制分析

乔小娟; 侯泉林; 琚宜文; 刘凯; 张玉修; 郭高轩

北京张坊地区岩溶地下水运移富集的构造控制分析

1.
中国科学院计算地球动力学重点实验室/中国科学院大学地球科学学院
2.
北京市水文地质工程地质大队

基金项目: 北京张坊地区岩溶地下水运移富集的构造控制分析

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出版历程
- 收稿日期: 2013-06-27
- 发布日期: 2014-06-25

Research about the control of geological structure on karst groundwater system in Zhangfang, Beijing

1.
Key Laborabory of Computational Geodynamics, CAS/College of Earth Sciences, University of Chinese Academy of Sciences
2.
Hydrogeology and Engineering Geology Team of Beijing

摘要

摘要: 北京西山张坊地区碳酸盐岩集中分布，地下水赋存于复杂的构造裂隙网络中，形成岩溶裂隙水。文章从构造空间分布的属性和规律出发，分析了在张坊地区褶皱构造格架控制的岩溶水文地质单元内，地下水赋存富集规律与多期构造演化产生的一系列北东-北西向、南北向断裂及裂隙网络的制约关系。研究表明，本区断裂经历了侏罗世逆冲推覆活动与白垩世的伸展构造，先压后张两期构造作用的叠加，形成了多条区域性断裂，其导水性能大为增强。裂隙中频度较大的NE和NW向是优势裂隙，表现出构造节理的共轭特征，多高倾角或直立，导致雨水的直接下渗；在裂隙交汇带构成了区域地下水的径流通道和存储空间，控制了白岱、甘池-长沟、高庄-石窝富水区的形成以及岩溶泉的出露，具有重要的供水意义。
- 岩溶地下水 /
- 地质构造 /
- 裂隙网络 /
- 构造控水 /
- 张坊
Abstract: Carbonate formations are intensively distributed throughout Zhangfang, Fangshan, in the West Mountain area of Beijing. Karst groundwater exits among the geological fracture network which is characterized by the different arrangements and levels in different types of fracture networks and structures. The influence of the tectonic environment on the dynamic change rule and the enrichment regulation of karst groundwater system is significant for the exploitation and protection of karst groundwater resources.From the control function of fault and fracture point of view, based on the developmental and distribution pattern of multi-episodic tectonism, this study analyzed fractures in the three-fold structural units characterized by NE-NW and NS trends and discussed the influence of multi-episodic tectonism on groundwater flow, the spring system and rich water zones.The results showed that the geological fracture underwent two episodes of tectonism, thrusting nappe in the Jurassic and extension in the Cretaceous. The overprint of the processes of the two tectonic episodes resulted in a number of faults with high hydraulic conductivity, which serve as conduits. The superior joint groups are in the NE and NW directions, with conjugated characteristics. The high-angle or vertical dips directly benefit infiltration. The fractures in the intersection areas have formed groundwater runoff channels and storage space, controlling water-rich zones such as Baidai, Ganchi-Changgou and Gaozhuang-Shiwo. Magmatic rock and the aquiclude also contribute to the rich water zones and the location of springs, all of which have important significance for water supply.
- system of karst groundwater /
- geological structure /
- fracture network /
- flow field controlled by structure /
- Zhangfang karst area

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