莱州湾晚第四纪以来沉积物元素地球化学特征及来源

刘荣波, 袁晓东, 林哲远, 仇建东, 胡日军, 高军锋, 刘龙龙, 张胜江. 莱州湾晚第四纪以来沉积物元素地球化学特征及来源[J]. 海洋地质与第四纪地质, 2022, 42(3): 100-110. doi: 10.16562/j.cnki.0256-1492.2022012301
引用本文: 刘荣波, 袁晓东, 林哲远, 仇建东, 胡日军, 高军锋, 刘龙龙, 张胜江. 莱州湾晚第四纪以来沉积物元素地球化学特征及来源[J]. 海洋地质与第四纪地质, 2022, 42(3): 100-110. doi: 10.16562/j.cnki.0256-1492.2022012301
LIU Rongbo, YUAN Xiaodong, LIN Zheyuan, QIU Jiandong, HU Rijun, GAO Junfeng, LIU Longlong, ZHANG Shengjiang. Geochemical characteristics and their geological implication in sediments from Laizhou Bay since late Quaternary[J]. Marine Geology & Quaternary Geology, 2022, 42(3): 100-110. doi: 10.16562/j.cnki.0256-1492.2022012301
Citation: LIU Rongbo, YUAN Xiaodong, LIN Zheyuan, QIU Jiandong, HU Rijun, GAO Junfeng, LIU Longlong, ZHANG Shengjiang. Geochemical characteristics and their geological implication in sediments from Laizhou Bay since late Quaternary[J]. Marine Geology & Quaternary Geology, 2022, 42(3): 100-110. doi: 10.16562/j.cnki.0256-1492.2022012301

莱州湾晚第四纪以来沉积物元素地球化学特征及来源

  • 基金项目: 中国地质调查局项目(DD20221724,DD20211586,GZH201200505)
详细信息
    作者简介: 刘荣波(1986—),男,硕士,高级工程师,从事水工环地质调查工作,E-mail :330725965@qq.com
    通讯作者: 仇建东(1983—),男,博士,高级工程师,从事海洋地质与第四纪地质调查与研究,E-mail:jiandongqiu@163.com
  • 中图分类号: P736.4

Geochemical characteristics and their geological implication in sediments from Laizhou Bay since late Quaternary

More Information
  • 元素地球化学信息对于地层划分和物源分析具有重要的指示意义。通过分析莱州湾BH1302孔岩芯沉积物常微量元素特征发现,元素含量在地层分界处发生明显变化,可以作为晚第四纪地层划分的重要指标。结合钻孔岩性相、粒度特征和测年数据,将研究区晚第四纪以来的沉积划分为4段,分别对应于晚中更新世、MIS 5期、MIS 4—3期和MIS 1期。钻孔岩芯沉积物常微量元素在垂向上变化存在着共生的关系,除Na2O、Ba和Sr外,大部分常微量元素变化与粒径强相关。R型因子分析揭示陆源细颗粒碎屑沉积、陆源粗颗粒碎屑沉积和海洋自生元素供应对BH1302孔沉积物的地球化学组成具有重要作用,但不同时期影响作用有所差异,陆源细颗粒碎屑沉积占主导地位,但短时期内陆源粗颗粒碎屑沉积或海洋自生元素供应也可能成为主导因素。

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  • 图 1  研究区BH1302孔位置

    Figure 1. 

    图 2  BH1302孔岩芯柱状图

    Figure 2. 

    图 3  BH1302孔沉积物常量元素垂向分布图

    Figure 3. 

    图 4  BH1302孔微量元素垂向分布

    Figure 4. 

    图 5  BH1302孔沉积物常微量元素相关性系数指示图

    Figure 5. 

    图 6  各因子从大到小的特征值分布图(碎石图)

    Figure 6. 

    图 7  BH1302孔沉积物元素影响因子得分曲线

    Figure 7. 

    表 1  BH-1302孔AMS14C测年结果

    Table 1.  AMS14C dating results of core BH1302

    深度/m材料δ13C
    /‰
    14C年龄/a日历年龄(cal.aBP)
    中值范围(2σ)
    4.38−3.26 530 ± 407 2337 166~7 299
    14.38−8.3>43 500
    18.23−6.1>43 500
    47.46+1.1>43 500
    下载: 导出CSV

    表 2  BH1302孔沉积物样品光释光测年结果

    Table 2.  Optically stimulated luminescence dating results for sediment samples of core BH1302

    样品编号深度/m含水率ω /%U/10-6Th/10-6K/%等效剂量/Gy年龄/ka
    OSL-19.2210.222.259.141.9891.4633.1±2.3
    OSL-211.1517.222.5510.432.02126.0543.0±1.9
    OSL-313.4512.522.157.361.56133.4359.0±3.9
    OSL-419.9014.762.216.051.75138.2966.7±3.2
    OSL-522.4611.191.856.112.20185.7068.5±5.5
    OSL-625.2212.261.996.222.19190.4871.3±3.4
    OSL-730.2514.471.847.352.10201.6676.4±3.5
    OSL-833.0525.652.228.852.28222.7680.1±7.3
    OSL-936.0010.511.987.311.99259.86102.3±5.0
    下载: 导出CSV

    表 3  BH1302孔沉积物常微量元素统计表

    Table 3.  Statistics of major and trace elements in the sediments of core BH1302

      平均值最大值最小值标准偏差变异系数
    主量元素
    /%
    SiO257.6577.2640.767.910.14
    Al2O310.9616.038.061.820.17
    CaO4.2711.370.622.070.48
    MgO1.792.660.280.560.31
    K2O2.443.641.940.290.12
    Na2O2.417.781.820.610.25
    TiO20.560.790.090.140.24
    P2O50.120.170.050.030.23
    MnO0.060.190.020.020.43
    TFe2O33.686.580.941.320.36
    微量元素/(μg/g)Ba549.111 499.00396.00155.540.28
    Sr232.24452.00160.0047.690.21
    Rb93.40136.0068.5015.070.16
    V64.66119.0011.9023.200.36
    Cr57.5295.208.9017.320.30
    Zn57.32102.0014.8020.360.36
    Ni24.4346.203.7010.070.41
    Pb20.3835.5013.004.780.23
    Cu19.4862.501.0010.620.55
    Ga14.4023.109.503.150.22
    Co10.2425.001.834.000.39
    Th10.0116.602.233.010.30
    Sc9.5116.901.143.370.35
    As8.7823.002.493.810.43
    下载: 导出CSV

    表 4  BH1302孔沉积物主微量元素方差极大旋转因子载荷表

    Table 4.  Load table of maximum variance rotation factor of major and trace elements in the sediments of core BH1302

    元素因子1因子2因子3元素因子1因子2因子3
    −0.736−0.479−0.349Co0.8820.230.248
    粉砂0.6450.5740.31Sc0.8870.3560.267
    黏土0.8120.1480.374Ga0.9770.0920.125
    Al2O30.9750.1050.005Th0.8520.4030.209
    MgO0.7280.4150.486Mz0.8070.370.359
    TiO20.7410.6120.126As0.5510.0420.366
    Fe2O30.9150.2470.24K2O0.299−0.847−0.208
    Rb0.945−0.1560.108Sr−0.565−0.6920.203
    V0.9030.3050.259Ba−0.191−0.818−0.203
    Cu0.8660.030.327CaO−0.0760.2290.934
    Pb0.825−0.1640.103MnO0.3170.020.713
    Zn0.890.2480.344P2O50.3560.4950.546
    Cr0.870.430.168SiO2−0.531−0.265−0.746
    Ni0.9070.2620.267方差贡献率/%67.01710.6026.665
    下载: 导出CSV
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收稿日期:  2022-01-23
修回日期:  2022-04-07
刊出日期:  2022-06-28

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