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LATE QUATERNARY STRATIGRAPHICAL FRAMEWORK AND POTENTIAL ENVIRONMENTAL PROBLEMS IN THE YANGTZE DELTA AREA
Author(s): 
Pages: 1-7
Year: Issue:  3
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY

Keyword:  地层构架环境问题晚第四纪长江三角洲;
Abstract: 根据钻孔的沉积相序将长江三角洲分为三角洲主体、三角洲南翼和北翼等3个基本的地层分区,鉴于两翼前缘和后缘的相序具有很大差异,因而两翼均划分出前缘和后缘2个亚区.地层结构的不同决定了与沉积层有关的潜在环境问题和灾害的分布,三角洲南翼和北翼的后缘为地面沉降发育区和潜在发育区,北翼的前缘为地下海水入侵的潜在发育区,三角洲主体是污染江水的潜在渗滤区,现今河口为底辟构造潜在发育区.
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