• 责任者：Wang Guangya (Geological Survey of Jiangsu Province ; Nanjing 210018 ; China) ; Shi Bin
• 刊名：Hydrogeology and Engineering Geology
• 出版年：2009
• 卷期：36(2)
• 关键词：地面沉降 ; land subsidence ; 地裂缝 ; ground fissures ; 江苏 ; Jiangsu Province
• 页码：p.117-122
• 图表：9 illus., 2 tables, 10 refs.
• 分类号：1800
• issnNo：ISSN1000-3665
• isbnNo：CN11-2202/P

The southern Jiangyin region is tectonically divided into two upheavals and one depression. The southern and northern margins of the region are buildup zones, and the central part is a plain underlain by Quaternary sediments. Difference is found in the thickness and lithology of the layered sediments, and the structure and hydrogeology of the region, which are controlled by the basement relief and the ancient river course. It is the dominant factor for the formation of earth fissures that long-term groundwater over-exploitation results in compaction of the deep confined sandy aquifer and consolidation of its underlying and overlying clayey aquitards. It is the controlling/background factor that the underlying bedrock ridge and the depth and structure of the sediments control the spatial and temporal characteristics of the earth fissure zone because of its leading to differential land subsidence. The depth of the earth fissure may reach the bedrock ridge, and a small fault is actually developed from the main fissure.