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陇东新近纪红粘土与第四纪黄土地球化学特征及其物源和风化指示意义

綦琳 乔彦松 刘宗秀 王燕 彭莎莎

綦琳, 乔彦松, 刘宗秀, 等, 2021. 陇东新近纪红粘土与第四纪黄土地球化学特征及其物源和风化指示意义. 地质力学学报, 27 (3): 475-490. DOI: 10.12090/j.issn.1006-6616.2021.27.03.043
引用本文: 綦琳, 乔彦松, 刘宗秀, 等, 2021. 陇东新近纪红粘土与第四纪黄土地球化学特征及其物源和风化指示意义. 地质力学学报, 27 (3): 475-490. DOI: 10.12090/j.issn.1006-6616.2021.27.03.043
QI Lin, QIAO Yansong, LIU Zongxiu, et al., 2021. Geochemical characteristics of the Tertiary and Quaternary eolian deposits in eastern Gansu province: Implications for provenance and weathering intensity. Journal of Geomechanics, 27 (3): 475-490. DOI: 10.12090/j.issn.1006-6616.2021.27.03.043
Citation: QI Lin, QIAO Yansong, LIU Zongxiu, et al., 2021. Geochemical characteristics of the Tertiary and Quaternary eolian deposits in eastern Gansu province: Implications for provenance and weathering intensity. Journal of Geomechanics, 27 (3): 475-490. DOI: 10.12090/j.issn.1006-6616.2021.27.03.043

陇东新近纪红粘土与第四纪黄土地球化学特征及其物源和风化指示意义

doi: 10.12090/j.issn.1006-6616.2021.27.03.043
基金项目: 

国家自然科学基金项目 41907377

国家自然科学基金项目 41888101

国家自然科学基金项目 41772383

详细信息
    作者简介:

    綦琳(1989-), 女, 博士, 助理研究员, 主要从事第四纪古气候研究工作。E-mail: liuyingqilin@sina.com

  • 中图分类号: P534.63;P534.62

Geochemical characteristics of the Tertiary and Quaternary eolian deposits in eastern Gansu province: Implications for provenance and weathering intensity

Funds: 

the National Science Foundation of China 41907377

the National Science Foundation of China 41888101

the National Science Foundation of China 41772383

  • 摘要: 甘肃省平凉市灵台县邵寨镇剖面风尘堆积底界年龄大约为5.23 Ma B.P.,通过对该剖面新近纪红粘土与第四纪黄土-古土壤序列的常量元素、微量元素、Nd同位素的测试,分析其在物源和风化方面的指示意义,发现新近纪红粘土与第四纪黄土具有相似的常量、微量元素UCC标准化曲线和稀土元素球粒陨石标准化曲线,指示二者皆来自广阔的物源区,经过了相似的搬运过程,并在搬运中得到充分混合。新近纪红粘土的MgO、Li、Cs、Bi含量较高,Na2O、稀土元素La-Lu、Y含量较低。风化参数Na2O/Al2O3、化学风化参数CIA以及Al2O3-CaO+Na2O-K2O (A-CN-K)图,均显示新近纪红粘土比第四纪黄土经历了更为强烈的风化过程。新近纪红粘土的稳定元素比值(TiO2/Al2O3,SiO2/Al2O3,SiO2/TiO2,Zr/Hf,Nb/Ta,Lu/Hf,Y/Ho,Th/Nb和Hf/Nb)、稀土元素总量、轻稀土与重稀土的分异程度、轻稀土内部分异程度、重稀土内部分异程度、Ce和Eu的异常程度、同位素εNd(0) 值等,皆与第四纪黄土无太大差异,指示二者物质来源一致。粒度以及风化强度的差异,可能是导致新近纪红粘土与第四纪黄土常量和微量元素含量差异的主要原因。

     

  • 图  1  邵寨剖面位置图

    Figure  1.  Map showing the location of the Shaozhai section in the Chinese Loess Plateau

    图  2  邵寨剖面岩性地层及磁性地层

    Figure  2.  Lithostratigraphy and magnetostratigraphy of the Shaozhai section

    图  3  邵寨剖面样品常量元素的UCC标准化值

    a—邵寨剖面所有样品的UCC标准化值;b—新近纪红粘土与第四纪黄土UCC标准化均值及标准差值

    Figure  3.  UCC-normalized abundances of major elements for the samples from the Shaozhai section. (a) Data for all studied samples. (b) Average and standard deviation for the Tertiary red clay and Quaternary loess.

    图  4  邵寨剖面样品不易迁移常量元素比值图

    Figure  4.  Plots of immobile major element ratios for the samples from the Shaozhai section. (a) SiO2/Al2O3 versus SiO2/TiO2. (b) TiO2/Al2O3 versus SiO2/TiO2. (c) SiO2/Al2O3 versus TiO2/Al2O3

    a—SiO2/Al2O3-SiO2/TiO2; b—TiO2/Al2O3-SiO2/TiO2; c—SiO2/Al2O3-TiO2/Al2O3

    图  5  邵寨剖面样品的Na2O/Al2O3-K2O/Al2O3

    Figure  5.  Na2O/Al2O3 versus K2O/Al2O3 diagram for the samples from the Shaozhai section

    图  6  邵寨剖面样品A-CN-K(Al2O3-CaO+Na2O-K2O)图

    Figure  6.  A-CN-K (Al2O3-CaO+Na2O-K2O) triangular diagram for the samples from the Shaozhai section

    图  7  邵寨剖面样品微量元素的UCC标准化值

    a—邵寨剖面所有样品的UCC标准化值;b—新近纪红粘土与第四纪黄土UCC标准化均值及标准差值

    Figure  7.  UCC-normalized abundances of trace elements for the samples from the Shaozhai section. (a) Standard data for all studied samples. (b) Standard average and standard deviation for the Tertiary red clay and Quaternary loess.

    图  8  邵寨剖面样品不易迁移微量元素比值图

    Figure  8.  Plots of immobile trace element ratios for the samples from the Shaozhai section

    图  9  邵寨剖面样品稀土元素球粒陨石标准化分布模式图

    a—邵寨剖面所有样品的球粒陨石标准化值;b—新近纪红粘土与第四纪黄土球粒陨石标准化均值及标准差

    Figure  9.  Chondrite-normalized abundances of trace elements for the samples from the Shaozhai section. (a) Data for all studied samples. (b) Average data and standard deviation for the Tertiary red clay and Quaternary loess.

    图  10  邵寨剖面样品的LREE/HREE-∑REE、LaN/SmN-GdN/LuN、Eu/Eu*-Ce/Ce*图解

    Figure  10.  LREE/HREE versus ∑REE, LaN/SmN versus GdN/LuN and Eu/Eu* versus Ce/Ce* diagrams for the samples from the Shaozhai section

    图  11  邵寨剖面样品εNd(0)变化图

    Figure  11.  Variations in εNd(0) of the samples from the Shaozhai section

    表  1  邵寨剖面样品常量元素数据表(单位%)

    Table  1.   Major element concentrations (%) of the samples from the Shaozhai section

    深度/m 层位 样品号 SiO2 Al2O3 Fe2O3 CaO MgO K2O Na2O TiO2 MnO P2O5 Total LOI
    第四纪黄土-古土壤
    5.0 L2 08SZ50 70.46 15.60 4.03 1.31 2.35 3.14 1.99 0.81 0.13 0.18 100 4.16
    25.0 S4 08SZ250 69.97 15.87 5.26 0.72 2.17 3.24 1.69 0.83 0.14 0.13 100 4.20
    33.4 S5 08SZ830 68.57 16.69 6.11 0.60 2.08 3.40 1.41 0.89 0.14 0.12 100 4.70
    51.2 L8 08SZ450 70.17 15.30 5.22 1.21 2.10 3.14 1.76 0.79 0.12 0.19 100 3.77
    67.3 S10 08SZ650 68.96 15.94 5.74 1.03 2.25 3.34 1.63 0.82 0.14 0.16 100 4.10
    70.4 S11 08SZ1200 69.65 16.15 5.67 0.64 1.97 3.56 1.31 0.82 0.14 0.09 100 4.06
    95.4 S18 08SZ1450 69.42 16.03 5.83 0.79 2.23 3.27 1.38 0.83 0.14 0.09 100 3.95
    119.4 S24 08SZ1690 69.29 15.83 5.84 0.99 2.24 3.42 1.31 0.82 0.13 0.14 100 3.94
    133.4 L27 08SZ1830 69.27 15.78 5.54 1.21 2.39 3.13 1.54 0.82 0.13 0.20 100 4.26
    141.4 S29 08SZ1910 69.00 16.16 5.92 0.92 2.30 3.36 1.26 0.82 0.14 0.13 100 4.08
    150.4 S32 08SZ2000 71.43 14.65 4.86 1.04 2.41 3.02 1.56 0.76 0.10 0.17 100 3.42
    平均 69.65 15.82 5.46 0.95 2.23 3.27 1.53 0.82 0.13 0.14 4.06
    标准偏差 0.81 0.52 0.60 0.24 0.14 0.16 0.23 0.03 0.01 0.04 0.32
    变异系数 1.17 3.30 10.93 25.26 6.15 4.85 14.73 3.65 8.38 25.44 7.79
    新近纪红粘土
    165.2 07SZ472 69.51 15.98 5.48 0.97 2.44 3.14 1.42 0.82 0.13 0.14 100 4.22
    173.4 07SZ800 68.26 16.53 5.86 1.05 2.79 3.20 1.19 0.85 0.13 0.14 100 4.51
    178.2 07SZ1660 68.32 16.74 6.22 0.97 2.43 3.21 1.04 0.84 0.14 0.09 100 4.55
    187.5 07SZ2032 68.73 16.27 6.04 1.14 2.43 3.26 1.06 0.81 0.13 0.13 100 4.53
    199.4 07SZ2506 68.46 16.50 6.06 1.01 2.54 3.29 1.08 0.82 0.14 0.10 100 4.35
    205.3 SZB160 68.74 16.17 5.72 1.03 2.62 3.24 1.39 0.84 0.14 0.13 100 4.41
    207.1 07SZ2815 67.71 16.91 6.14 0.87 2.63 3.57 1.14 0.81 0.15 0.08 100 4.34
    216.8 07SZ3204 69.62 15.85 5.75 1.25 2.44 3.08 0.87 0.83 0.12 0.20 100 4.69
    225.1 SZC48 67.97 15.83 5.85 0.89 4.13 3.41 0.90 0.83 0.13 0.05 100 4.48
    226.7 红粘土 07SZ3600 69.57 16.14 5.87 1.01 2.35 3.08 0.93 0.83 0.14 0.08 100 4.32
    228.9 SZC200 69.05 16.09 5.77 1.04 2.77 3.21 0.99 0.83 0.14 0.11 100 4.45
    229.4 07SZ3709 69.12 16.12 5.84 1.03 2.69 3.06 1.08 0.82 0.13 0.12 100 4.35
    232.4 07SZ4015 68.93 16.26 5.71 1.16 2.73 3.23 0.86 0.84 0.13 0.16 100 4.49
    233.9 SZC400 69.32 15.60 5.55 1.15 3.37 3.01 0.90 0.84 0.12 0.15 100 4.64
    236.4 07SZ4306 68.77 16.33 5.94 0.84 2.59 3.36 1.15 0.82 0.14 0.07 100 4.16
    238.9 SZC600 68.59 16.23 6.03 1.01 2.85 3.28 0.97 0.82 0.13 0.09 100 4.43
    240.2 07SZ4530 67.81 16.61 5.70 0.98 3.11 3.45 1.23 0.83 0.13 0.14 100 4.52
    247.9 07SZ4840 69.15 16.21 5.98 0.93 2.66 3.13 0.90 0.82 0.13 0.09 100 4.55
    250.7 SZD240 66.79 16.29 5.66 1.20 4.24 3.44 1.26 0.81 0.15 0.17 100 4.48
    平均 68.65 16.24 5.85 1.03 2.83 3.25 1.07 0.83 0.13 0.12 4.44
    标准偏差 0.73 0.32 0.20 0.11 0.54 0.15 0.17 0.01 0.01 0.04 0.13
    变异系数 1.06 1.97 3.37 10.88 18.96 4.61 15.84 1.34 6.73 30.65 3.00
    UCC(Taylor and Mclennan, 1985McLennan,2001)
    66.00 15.20 5.00 4.20 2.20 3.40 3.90 0.68 0.07
    下载: 导出CSV

    表  2  邵寨剖面样品微量元素数据表(单位μg/g)

    Table  2.   Trace element concentrations (μg/g) of the samples from the Shaozhai section

    样品号 Li Be Sc V Co Ni Ga Rb Sr Y Zr Nb Cs Ba Hf Ta Tl Pb Bi Th U
    第四纪黄土-古土壤
    08SZ50 44.80 2.14 13.60 115.00 16.40 42.30 20.60 102.00 108.00 29.50 222.00 17.10 8.72 449.00 5.10 1.66 0.65 22.80 0.36 15.60 2.45
    08SZ250 43.70 2.06 14.90 114.00 16.90 50.20 20.30 119.00 117.00 31.20 213.00 16.10 10.60 505.00 5.93 1.82 0.71 26.60 0.41 16.70 2.39
    08SZ830 40.80 1.92 13.30 110.00 15.10 39.40 18.50 111.00 122.00 31.20 252.00 16.60 7.77 510.00 5.87 1.64 0.59 22.00 0.32 15.80 2.57
    08SZ450 43.60 2.06 14.60 114.00 16.50 42.80 20.70 118.00 107.00 28.20 226.00 16.60 9.55 505.00 5.69 1.63 0.70 25.30 0.37 16.80 2.48
    08SZ650 42.60 2.11 15.20 115.00 16.80 44.70 19.90 120.00 109.00 32.00 216.00 15.90 10.50 537.00 6.16 1.83 0.70 27.00 0.41 17.70 2.43
    08SZ1200 48.10 2.17 14.00 121.00 16.70 44.00 20.50 105.00 114.00 32.70 233.00 17.60 9.74 469.00 5.65 1.78 0.65 23.40 0.36 16.50 2.64
    08SZ1450 46.50 2.06 13.90 112.00 16.50 42.30 20.10 103.00 106.00 30.30 226.00 16.60 9.58 455.00 5.85 1.66 0.68 24.50 0.38 16.80 2.54
    08SZ1690 50.10 2.21 13.00 125.00 17.80 55.90 20.50 84.00 98.40 30.30 228.00 17.20 10.80 436.00 6.07 2.02 0.67 26.20 0.41 15.20 2.54
    08SZ1830 43.40 2.12 14.70 113.00 15.90 41.00 20.00 116.00 122.00 35.50 225.00 16.30 9.07 478.00 6.06 1.76 0.68 25.10 0.37 16.20 2.64
    08SZ1910 44.70 2.20 13.90 118.00 17.10 45.50 20.50 110.00 102.00 35.00 226.00 16.80 10.90 494.00 6.04 1.97 0.69 25.80 0.42 17.90 2.43
    08SZ2000 37.30 1.84 12.80 95.80 13.40 35.30 17.50 110.00 128.00 31.60 257.00 15.20 7.12 471.00 6.97 1.70 0.60 22.10 0.29 14.30 2.48
    平均 44.15 2.08 13.99 113.89 16.28 43.95 19.92 108.91 112.13 31.59 229.00 16.55 9.49 482.64 5.94 1.77 0.67 24.62 0.37 16.32 2.51
    标准偏差 3.45 0.11 0.79 7.35 1.17 5.44 1.01 10.41 9.25 2.19 13.58 0.66 1.24 30.41 0.45 0.13 0.04 1.79 0.04 1.06 0.08
    变异系数 7.81 5.48 5.63 6.45 7.20 12.38 5.05 9.56 8.25 6.92 5.92 4.01 13.07 6.30 7.55 7.46 5.99 7.29 10.87 6.48 3.38
    新近纪红粘土
    07SZ472 49.70 2.24 15.40 127.00 17.00 46.30 20.20 127.00 109.00 28.40 236.00 16.60 11.10 531.00 5.99 1.88 0.71 28.10 0.43 19.00 2.52
    07SZ800 51.40 2.13 15.00 120.00 17.60 45.30 21.00 129.00 103.00 26.10 191.00 16.50 10.90 485.00 4.75 1.65 0.74 27.40 0.43 16.80 2.37
    07SZ1660 45.00 2.10 15.30 112.00 16.40 43.90 20.00 119.00 114.00 31.50 234.00 15.90 9.61 516.00 6.41 1.83 0.69 26.40 0.38 17.40 2.51
    07SZ2032 51.00 2.27 15.20 131.00 17.70 46.80 21.70 125.00 101.00 30.10 225.00 16.90 10.80 507.00 5.83 1.74 0.71 27.30 0.39 17.60 2.57
    07SZ2506 54.20 2.24 16.30 130.00 17.90 58.10 21.80 133.00 105.00 31.40 245.00 17.50 11.20 519.00 5.93 1.75 0.70 26.20 0.40 19.00 2.61
    SZB160 48.60 2.17 14.80 121.00 18.30 47.10 21.40 117.00 108.00 30.30 238.00 17.70 9.92 493.00 5.50 1.70 0.67 24.60 0.38 16.70 2.50
    07SZ2815 44.30 2.18 15.70 120.00 17.30 48.20 20.70 126.00 107.00 32.00 233.00 17.20 11.30 505.00 5.89 1.87 0.69 27.40 0.41 18.80 2.51
    07SZ3204 45.50 2.24 11.50 119.00 16.50 45.30 20.10 78.20 77.40 22.20 209.00 16.00 9.91 387.00 5.71 1.70 0.64 24.90 0.42 13.30 2.26
    SZC48 50.10 2.04 15.30 117.00 16.00 44.30 20.20 118.00 107.00 32.40 281.00 17.10 9.86 448.00 6.45 1.78 0.65 23.30 0.39 17.20 2.57
    07SZ3600 46.50 2.28 15.60 121.00 17.60 47.40 21.40 125.00 104.00 30.50 193.00 15.90 11.30 510.00 5.31 1.80 0.76 27.90 0.41 17.60 2.34
    SZC200 46.40 2.09 15.50 108.00 16.80 46.00 20.10 127.00 113.00 33.20 224.00 15.60 11.30 494.00 6.11 1.75 0.73 26.80 0.41 18.00 2.52
    07SZ3709 43.00 1.97 15.00 112.00 16.50 44.90 19.20 110.00 105.00 31.60 240.00 15.90 10.10 480.00 6.11 1.75 0.62 24.50 0.38 18.10 2.56
    07SZ4015 41.90 2.16 14.80 116.00 16.40 45.80 19.40 117.00 103.00 30.20 238.00 15.60 10.50 491.00 6.46 1.82 0.68 27.20 0.42 17.00 2.43
    SZC400 46.10 2.07 14.40 110.00 16.40 45.40 19.90 111.00 99.60 29.10 227.00 15.40 11.00 448.00 6.30 1.75 0.69 28.00 0.41 16.00 2.43
    07SZ4306 44.00 1.87 13.80 105.00 15.10 41.00 18.80 101.00 94.70 29.80 217.00 15.30 8.92 431.00 4.92 1.52 0.62 21.70 0.34 16.50 2.25
    SZC600 47.90 2.06 13.80 122.00 17.00 44.30 20.60 111.00 101.00 26.10 232.00 16.20 9.97 444.00 5.86 1.67 0.69 25.50 0.39 15.20 2.46
    07SZ4530 49.50 2.16 15.20 118.00 16.70 46.40 19.70 120.00 105.00 31.80 229.00 15.80 11.20 503.00 5.94 1.78 0.68 27.00 0.41 19.20 2.77
    07SZ4840 48.10 2.16 14.50 121.00 17.10 44.30 20.60 110.00 102.00 25.00 208.00 15.90 11.00 434.00 5.65 1.76 0.74 28.10 0.45 14.20 2.24
    SZD240 48.30 2.08 13.30 120.00 16.60 46.30 19.80 85.80 104.00 28.10 287.00 16.70 9.23 430.00 6.75 1.70 0.64 24.80 0.42 16.30 2.43
    平均 47.45 2.13 14.76 118.42 16.89 46.16 20.35 115.26 103.30 29.46 230.89 16.30 10.48 476.63 5.89 1.75 0.69 26.16 0.40 17.05 2.47
    标准偏差 3.15 0.11 1.08 6.90 0.75 3.30 0.84 14.28 7.71 2.87 24.05 0.72 0.76 39.09 0.51 0.08 0.04 1.79 0.02 1.60 0.13
    变异系数 6.64 4.94 7.29 5.83 4.43 7.14 4.12 12.39 7.47 9.74 10.41 4.41 7.27 8.20 8.73 4.75 5.87 6.84 6.08 9.36 5.44
    UCC(Taylor and Mclennan, 1985McLennan,2001)
    20.00 3.00 13.60 107.00 17.00 44.00 17.00 112.00 350.00 22.00 190.00 12.00 4.60 550.00 5.80 1.00 0.75 17.00 0.13 10.70 2.80
    下载: 导出CSV

    表  3  邵寨剖面样品稀土元素数据表(单位μg/g)

    Table  3.   Rare earth element concentrations (μg/g) of the samples from the Shaozhai section

    样品号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Y ∑REE LREE/HREE LaN/SmN GdN/YbN Eu/Eu* Ce/Ce*
    第四纪黄土-古土壤
    08SZ50 38.80 81.10 8.73 31.30 6.22 1.09 5.25 0.82 5.10 0.99 3.02 0.45 3.01 0.41 29.50 215.79 3.44 3.94 1.59 0.58 1.06
    08SZ250 46.10 92.70 11.60 43.00 8.09 1.47 6.33 1.00 6.36 1.15 3.26 0.47 3.03 0.46 31.20 256.22 3.81 3.60 1.71 0.63 0.97
    08SZ830 37.60 84.90 8.60 32.00 6.46 1.17 5.41 0.85 5.20 1.05 3.16 0.49 3.00 0.42 31.20 221.51 3.36 3.68 1.60 0.61 1.14
    08SZ450 41.60 90.30 9.35 32.50 6.18 1.18 4.81 0.86 5.11 0.98 2.96 0.45 3.04 0.44 28.20 227.96 3.87 4.25 1.36 0.66 1.10
    08SZ650 44.00 99.00 10.60 39.00 7.28 1.26 5.76 0.95 5.97 1.15 3.29 0.48 3.17 0.48 32.00 254.39 3.78 3.82 1.49 0.60 1.10
    08SZ1200 44.80 95.60 10.10 37.40 7.63 1.41 6.21 0.94 5.53 1.08 3.30 0.51 3.17 0.43 32.70 250.81 3.66 3.71 1.79 0.63 1.08
    08SZ1450 41.80 94.80 9.92 33.70 6.47 1.19 5.14 0.91 5.68 1.08 3.28 0.50 3.23 0.48 30.30 238.48 3.71 4.08 1.33 0.63 1.12
    08SZ1690 43.00 81.50 10.10 37.80 7.41 1.36 5.74 0.90 5.41 1.10 3.17 0.44 2.86 0.41 30.30 231.50 3.60 3.66 1.74 0.64 0.94
    08SZ1830 45.20 99.30 11.10 40.50 7.64 1.45 6.49 1.04 6.47 1.20 3.55 0.54 3.52 0.52 35.50 264.02 3.49 3.74 1.55 0.63 1.07
    08SZ1910 45.30 87.30 11.10 41.20 8.22 1.48 6.48 1.04 6.45 1.27 3.69 0.52 3.27 0.49 35.00 252.81 3.34 3.48 1.64 0.62 0.94
    08SZ2000 38.40 84.70 9.71 34.60 6.66 1.26 5.51 0.93 5.83 1.11 3.21 0.48 3.12 0.46 31.60 227.58 3.36 3.64 1.49 0.64 1.06
    平均 42.42 90.11 10.08 36.64 7.11 1.30 5.74 0.93 5.74 1.11 3.26 0.48 3.13 0.45 31.59
    标准偏差 3.03 6.65 0.97 4.05 0.75 0.14 0.58 0.07 0.52 0.09 0.21 0.03 0.18 0.04 2.19
    变异系数 7.14 7.38 9.60 11.04 10.48 10.59 10.02 7.92 9.12 7.75 6.43 6.48 5.60 7.89 6.92
    新近纪红粘土
    07SZ472 45.00 97.80 9.93 36.30 6.79 1.20 5.03 0.82 5.03 1.00 3.06 0.46 2.95 0.41 28.40 244.18 4.18 4.18 1.52 0.63 1.11
    07SZ800 36.80 79.40 8.61 29.70 5.62 1.01 4.56 0.77 4.70 0.89 2.72 0.41 2.79 0.39 26.10 204.47 3.72 4.13 1.45 0.61 1.07
    07SZ1660 42.50 95.00 10.50 37.40 7.07 1.27 5.66 0.94 5.93 1.13 3.33 0.50 3.34 0.48 31.50 246.55 3.67 3.80 1.46 0.61 1.08
    07SZ2032 43.80 99.30 10.50 37.50 7.13 1.26 5.49 0.93 5.70 1.09 3.24 0.48 3.18 0.47 30.10 250.17 3.94 3.88 1.45 0.62 1.12
    07SZ2506 41.50 100.00 9.26 33.90 6.53 1.24 5.33 0.85 5.40 1.08 3.31 0.50 3.19 0.44 31.40 243.93 3.74 4.01 1.50 0.64 1.23
    SZB160 40.70 88.40 9.07 31.30 6.18 1.09 5.29 0.85 5.07 1.03 3.10 0.47 3.07 0.42 30.30 226.34 3.56 4.16 1.56 0.58 1.11
    07SZ2815 40.60 88.00 9.33 33.90 6.60 1.23 5.32 0.86 5.56 1.13 3.40 0.51 3.16 0.44 32.00 232.04 3.43 3.88 1.50 0.63 1.09
    07SZ3204 33.30 76.50 8.23 29.70 5.48 1.01 4.32 0.69 4.36 0.80 2.39 0.35 2.39 0.34 22.20 192.06 4.08 3.84 1.58 0.63 1.11
    SZC48 41.90 83.30 9.41 33.70 6.53 1.22 5.36 0.85 5.20 1.04 3.20 0.49 3.08 0.44 32.40 228.12 3.38 4.05 1.51 0.63 1.01
    07SZ3600 43.50 96.50 10.30 36.50 6.74 1.21 5.22 0.91 5.76 1.09 3.19 0.47 2.94 0.44 30.50 245.27 3.85 4.08 1.47 0.62 1.10
    SZC200 43.30 97.30 10.80 39.70 7.54 1.40 6.19 1.05 6.30 1.19 3.48 0.50 3.33 0.48 33.20 255.76 3.59 3.63 1.60 0.63 1.08
    07SZ3709 42.50 86.10 9.76 36.40 7.15 1.27 5.62 0.89 5.59 1.10 3.31 0.48 3.04 0.43 31.60 235.24 3.52 3.75 1.62 0.61 1.02
    07SZ4015 38.90 90.30 9.33 33.70 6.43 1.16 5.01 0.84 5.39 1.06 3.17 0.48 3.09 0.45 30.20 229.51 3.62 3.82 1.38 0.63 1.14
    SZC400 37.90 87.30 9.40 33.80 6.32 1.11 5.14 0.84 5.49 1.02 3.02 0.46 3.05 0.44 29.10 224.39 3.62 3.79 1.45 0.60 1.11
    07SZ4306 39.60 83.30 8.86 31.80 6.03 1.15 5.08 0.84 5.03 0.99 3.03 0.46 2.93 0.41 29.80 219.31 3.52 4.15 1.54 0.64 1.07
    SZC600 34.60 80.00 8.02 28.00 5.36 1.00 4.41 0.74 4.53 0.87 2.76 0.42 2.83 0.41 26.10 200.05 3.64 4.08 1.34 0.63 1.16
    07SZ4530 42.50 90.90 9.98 37.10 7.42 1.26 5.60 0.91 5.59 1.15 3.26 0.48 3.07 0.44 31.80 241.46 3.62 3.62 1.58 0.60 1.06
    07SZ4840 33.60 72.60 8.31 29.90 5.48 0.99 4.29 0.72 4.55 0.85 2.52 0.37 2.53 0.38 25.00 192.09 3.66 3.87 1.40 0.62 1.05
    SZD240 37.80 76.60 8.23 30.50 6.06 1.10 4.52 0.75 4.58 0.93 2.84 0.43 2.65 0.38 28.10 205.47 3.55 3.94 1.48 0.64 1.05
    平均 40.02 87.82 9.36 33.73 6.45 1.17 5.13 0.84 5.25 1.02 3.07 0.46 2.98 0.43 29.46
    标准偏差 3.53 8.41 0.84 3.30 0.66 0.11 0.51 0.09 0.53 0.11 0.30 0.04 0.25 0.04 2.87
    变异系数 8.81 9.58 9.01 9.79 10.26 9.69 10.03 10.25 10.18 10.75 9.73 9.63 8.44 8.44 9.74
    UCC(Taylor and Mclennan, 1985McLennan,2001)
    30.00 64.00 7.10 26.00 4.50 0.88 3.80 0.64 3.50 0.80 2.30 0.33 2.20 0.32
    球粒陨石(Taylor and Mclennan, 1985McLennan,2001)
    0.310 0.808 0.122 0.600 0.165 0.074 0.259 0.047 0.322 0.072 0.210 0.032 0.209 0.034
    下载: 导出CSV

    表  4  邵寨剖面样品Sm-Nd同位素数据表

    Table  4.   Sm-Nd data of the samples from the Shaozhai section

    样品号 Sm (μg/g) Nd (μg/g) 147Sm/144Nd 143Nd/144Nd (±2σ*10-6) εNd(0)
    第四纪黄土-古土壤
    08SZ250 3.592 20.218 0.1075 0.512065±8 -11.1775
    08SZ830 3.650 20.270 0.1089 0.512083±7 -10.8264
    08SZ450 4.425 24.828 0.1078 0.512077±9 -10.9434
    08SZ650 3.511 19.263 0.1103 0.512077±12 -10.9434
    08SZ1200 3.509 19.245 0.1103 0.512079±7 -10.9044
    08SZ1450 3.599 19.808 0.1099 0.512078±6 -10.9239
    08SZ1690 3.956 21.959 0.1090 0.512084±6 -10.8068
    新近纪红粘土
    07SZ472 3.436 19.594 0.1061 0.51207±7 -11.0799
    07SZ1660 3.287 18.670 0.1065 0.512074±7 -11.0019
    07SZ2032 3.307 19.056 0.1050 0.512068±11 -11.1190
    07SZ2506 3.355 19.112 0.1062 0.512071±7 -11.0604
    SZB160 3.445 20.040 0.1040 0.512065±5 -11.1775
    07SZ2815 3.346 19.157 0.1057 0.512062±5 -11.2360
    07SZ3204 3.378 19.545 0.1046 0.512063±7 -11.2165
    SZC48 3.406 19.442 0.1060 0.512076±6 -10.9629
    07SZ3600 3.900 21.848 0.1080 0.512069±6 -11.0995
    SZC200 3.472 20.016 0.1049 0.512079±8 -10.9044
    07SZ3709 3.799 21.567 0.1066 0.512092±8 -10.6508
    07SZ4015 3.439 19.560 0.1064 0.512078±5 -10.9239
    07SZ4306 3.485 19.602 0.1075 0.512085±5 -10.7873
    SZC600 3.057 17.490 0.1057 0.512079±6 -10.9044
    下载: 导出CSV
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  • 收稿日期:  2020-12-01
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