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Study on the 3D Perspective Method for the Areas with Shallow Quaternary Cover: Taking the Northwest of the Taihu Lake as an Example

ZHANG Xiang-yun1 2, ZHANG Qing-long1, SHAO Jia-ji2   

  1. 1. Department of Earth Sciences, Nanjing University, Nanjing 210093, China; 2. Geological Survey of Jiangsu Province, Nanjing 210018, China
  • Received:2004-03-20 Revised:2004-03-20 Online:2004-03-20 Published:2004-03-20

Abstract: Using the method of the anatomic drawing, the authors studied the shallow Quaternary cover in the northwest of the Taihu Lake from an angle of 3D stratigraphic perspective. The anatomic drawing expresses the lithological characteristics, thickness and sedimentary structural features, especially the 3D changes of the Neogene and Quaternary systems intuitvely. In this way, we could recognize the environment at the time of deposition and the lithological distribution on the terraces. In the meanwhile, it can show the features of uplift and sybsidence of the basement during the early Neogene. Even more, the drawing provides a new method and steady basic geological data to research the neotectonic movements, correlate the strata and establish the depositional structural model of the area. It should be emphasizd that the stratigraphic correlation and the multiple subdivision of the Quaternary system are essential for this method.