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一、概况山东、江苏北部分属华北地台和扬子地台。前者包括济阳、昌潍、临清等坳陷和鲁西、鲁东、蚌埠等隆起区;后者有盐阜、东台坳陷和建湖隆起区(图1)。全区共有39个盆地,均不同程度发育有中、新生代的沉积(表1),厚均达5000米以上。据不完全统计,在半数以上的盆地中发现了早第三纪石膏、盐岩等蒸发岩地层。在东营和大汶口盆地的早第三纪的
First, an overview of Shandong, Jiangsu North part of the North China platform and the Yangtze platform. The former includes Jiyang, Changwei and Linqing depressions and uplifts such as Luxi, Ludong and Bengbu; the latter includes Yanfu, Dongtai Depression and Jianhu Uplift (Figure 1). There are a total of 39 basins in the region, all of which have different degrees of sedimentation in Mesozoic and Cenozoic (Table 1), reaching an average thickness of more than 5,000 meters. According to incomplete statistics, early half of the Tertiary gypsum, salt rock and other evaporite formations were found in more than half of the basins. Early Tertiary in the Dongying and Dawenkou basins