晚更新世以来莱州湾南岸地下卤水资源分布特征

Distribution characteristics of subsurface brine resources on the southern coast of laizhou bay since late pleistocene

在分析莱州湾南岸地下卤水资源沉积环境及地质特征基础上,通过地质沉积背景和地下卤水水文特征对比,重新厘定地下卤水层与三次海侵的关系。研究表明,晚更新世以来莱州湾出现过三次海陆相地层变化序列,其中三个海相地层分别与沧州、献县和黄骅海侵事件相对应,三个卤水层分别赋存于三个海相地层中。在水平方向上,三个海相层的卤水分布基本呈条带状分布;在虞河以西,卤水层形成了中间浓度高,近岸、远岸浓度低的分布格局;在虞河以东,除灶户盐场北部地区浓度最高以外,其余地区从沿海向内陆逐渐降低。在垂直方向上,卤水层呈透镜体状,卤水浓度分带性明显,形成上、下低,中间高的分布格局。第II海相层的卤水分布范围广,浓度高,储量大。

Based on the analysis of geological characteristics and geological environment of subsurface brine resources on the southern coast of the Laizhou Bay,this paper redefines the relationship between subsurface brine deposits on the southern coast of the Laizhou Bay and the three transgression since Late Pleistocene bycomparing the geological sedimentary background with hydrological characteristics of subsurface brine resources. Meanwhile,distribution characteristics and exploitation status of the underground brines are analyzed. The results indicate that the marine beds were related to the Cangzhou,Xianxian and Huanghua transgression events. In the horizontal direction,the distributions of the brines in the three marine layers are banded basically. On the west of the Yu river,the concentration of the middle brine layer is high,and the concentration of nearshore and offshore brine layers are low. On the east of the Yu river,the concentration of nearshore brine layer is high,while the concentration of the brines near the northern Zaohu salt field is high.The concentration of offshore brine layer is lower than that of the northern area. In the vertical direction,the shape of the brine occurrence is nearly lenticular. The concentration of top or bottom brine layers are low,and the concentration of the intermediate brine layer is high. The brine distribution of the second marine layer is wide,and brine in this layer has high concentration and large amount of reserves.