渤海西岸五号桩介形虫壳体地球化学标型特征研究

本文用电子探针分析了渤海地区一深120m钻孔中15个介形虫壳体的化学组成。结果表明,地层中介形虫的壳体成分主要为CaO(含量50.16—54.60％),其次为SrO、K_2O、NaO、SiO_2、MgO、Al_2O_3、FeO和MnO。在不同层位中,介形虫壳体成分的变化,反映了不同的沉积相。全新世介形虫壳体的化学成分与晚更新世介形虫壳体的化学成分相比较,除CaO降低外,其它化学成分增高。

STUDY ON THE GEOCHEMISTRY INDICATION CHARAC TERISTICS OF OSTRACOTA CARAPACE FROM THE BOHAI SEA

The chemical composition of 15 ostracoda carapaces from a core of 120m long was analysed by electromprobe, The result shows that the chemical elements of the carapace were primarily CaO(50.16-54.60 wt%), with SrO, K_2O, Na_2O, SiO_2 MgO, A1_2O_3, FeO and MnO taking the secondary place. The component of ostracoda carapace varies in different facies, indicating different sedimentary facies. The component of the ostracoda carapace from the holocene epoch contrasts with that of the later pleistocene, all its element contents are higher except CaO, whose content is lower.