黄河三角洲地区浅层沉积序列及构造沉降特征

CHARACTER OF SEDIMENTARY SEQUENCE AND STRUCTURAL SETTLEMENT OF SHALLOW LAYERS IN THE YELLOW RIVER DELTA

在整个黄河三角洲地区和莱洲湾南岸晚更新世以来经历了海陆相沉积的频繁交替,本文通过古地磁和14C测年资料对不同钻孔的晚更新世地层进行了精确的年代对比,揭示了不同时期的沉积序列。并通过27口钻井的联合对比剖面,揭示出本区晚更新世以来的新构造运动表现为二凹夹一隆的构造特征,对黄河三角洲发育位置和沉降特征有强烈的控制作用。

Frequent alternation occurrs between marine sediments and land sediments in the whole Yellow River delta area and the south bank of the Laizhou gulf since late Pleistocene. This paper reveals sedimentary sequences of the different periods in this area through the exact contrast for late Pleistocene strata in different drills based on ancient geomagnetism and 14C time information. Moreover, through contrast section about 27 drills, this paper expounds the neotectonism in this area shows the character of two sags intercalating one uplift, and the neotectonism plays an important role to control the developing station and settlement character of the Yellow River delta.