GEOCHMICAL RECORDS OF SURFACE SEDIMENTS IN THE WESTERN BOHAI SEA
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摘要:
对渤海西部表层沉积物44个样品20种化学组分进行了测试分析，研究了各化学组分分布特征及物质来源。Al2O3、MgO、TFe2O3、K2O、Corg、TN、Li、V和Sb等组分与细粒沉积物呈正相关，SiO2组分与粗粒沉积物呈正相关，Na2O、CaO和Ta组分与沉积物粒度无明显正或负的相关性；研究区化学组分R-型因子分析得出3种主要组合类型，以Li、CaO和TC为代表，分别代表了陆源细粒物质输入、黄河物质、黄河物质与海河物质的影响。CaO/Al2O3与K2O/Al2O3、Zr/ Al2O3与CaO/ Al2O3的离散图和Q-型聚类分析表明，渤海西部沉积物主要来源于黄河和海河，东北部沉积物受到了滦河物质的影响。
Abstract:Based on the concentrations of chemical components SiO2, Al2O3, TFe2O3, CaO, MgO, Na2O, K2O, TiO2, P2O5, MnO, Li, V, Sb, Nb, Ta、Zr, Corg, LOI, TN and TC in surface sediment samples taken from 44 stations in the west part of the Bohai Sea, the distribution pattern and material sources of the chemical components are studied. The chemical components of Al2O3, MgO, TFe2O3, K2O, Corg, TN, Li, V and Sb are positively correlated with the fine-grained sediments, while SiO2 is positively correlated with coarse-grained sediments; there are no significant positive or negative correlations between Na2O, CaO and Ta and grain sizes of sediments. R-mode cluster analysis indicates three types of combinations that are represented by Li, CaO and TC, respectively, reflecting the input of terrigenous fine-grained material, the impact of the Yellow River, and the substances from both Yellow and Haihe Rivers, respectively. Combined with scatter diagrams of CaO/Al2O3 vs.K2O/Al2O3, Zr/Al2O3vs. CaO /Al2O3 , the Q-mode cluster analysis is drawn to reveal the source of sediments in the west part of the Bohai Sea. The results suggest that the sediments of the study area mainly come from the Yellow River and Haihe River, and the sediments in the northeast part of the study area are apparently influenced by the materials from the Luanhe River.
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Key words:
- chemical components /
- geochemistry /
- sediments /
- provenance /
- western Bohai Sea
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表 1 渤海西部表层沉积物化学组分含量
Table 1. Chemical composition of surface sediments in the western Bohai Sea
化学组分 平均值 范围 变异系数 SiO2 57. 5 48. 6~74. 9 0.10 Al2O3 13. 5 9. 85~15. 3 0.11 CaO 5. 54 1 61~10. 0 0.40 MgO 2. 64 1 35~3. 13 0.16 K2O 2. 91 2. 30~3. 31 0.10 Na2O 3.53 2. 58~4. 37 0.13 TiO2 0. 68 0. 34~0. 76 0.11 P2O5 0. 17 0. 11~0. 20 0.09 MnO 0.10 0. 05~0. 23 0.34 TFe2O3 5.19 2. 60~6. 53 0.10 Corg 0.41 0. 09~0. 75 0.41 LOI 0.29 2. 64~12. 9 0.29 TN 0.06 0. 02~0. 10 0.37 TC 1.32 0. 36~2. 46 0.33 Li 43.7 20. 4~60. 9 0.27 V 83.4 40. 6~106 0.21 Sb 0.83 0. 51~1. 28 0.25 Nb 13.9 8. 9~16. 9 0.12 Ta 1.53 1 0~2. 2 0.16 Zr 211 114~425 0.30 注：SiO2、Al2O3、TFe2O3、CaO、MgO、Na2O、K2O、TiO2、P2O5、MnO、Corg、LOI、TN、TC等化学组分含量单位为% Li、V、Sb、Nb、Ta和Zr等微量元素含量单位为mg/kg。 
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表 2 渤海西部表层沉积物元素含量对比
Table 2. Correlation element contents from surface sediments in the western Bohai Sea
元素 本研究区 渤海中东部5 渤海泥[11] 中国浅海[11] 黄河[11, 12] 海河[12, 13] 溁河[12, 14] SiO2 57. 5 67. 7 56.0 63.8 53.5 57.7 74.9 A12O3 13. 5 11. 5 14. 2 11. 1 12. 5 11. 6 9. 10 CaO 5. 54 3.29 4.60 5.29 7.50 6.46 2.52 MgO 2. 64 1. 49 2.49 1. 84 2.60 1. 91 0.80 K2O 2. 91 2. 72 2.90 2.32 2. 61 2. 19 2.35 Na2O 3.53 2.23 2.49 1.99 1. 98 1. 99 3. 19 TiO2 0. 68 0. 51 0.68 0.58 0. 61 0. 57 0.22 P2O5 0. 17 0. 11 0. 11 0.09 MnO 0. 10 0. 11 0.088 0.068 0.063 0.0.4 0.040 TFe2O3 5. 19 3. 79 5.63 4.36 4.77 3. 91 2. 07 Corg 0. 41 0. 41 0. 78 0.62 Li 43.7 47 38 23 V 83.4 67.7 91 70 66 94 Sb 0.83 0.8 0.5 0.62 Nb 13. 9 16 14 15 8.6 Ta 1. 53 1. 0 0.98 1. 0 0.7 Zr 211 251 210 210 354 80 204 注：SiO2、Al2O3、TFe2O3、CaO、MgO、Na2O、K2O、TiO2、P2O5、MnO、Corg等常量元素含量单位为%; Li、V、Sb、Nb、Ta和Zr等微量元素含量单位为mg/kg。
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表 3 渤海西部表层沉积物化学组分与沉积物类型R-型主因子负荷矩阵
Table 3. R-mode rotated factor matrices of chemical components and sediment types of surface sediment in the western Bohai Sea
元素 因子1 因子2 因子3 SiO2 -0.47 -0.84 -0.21 Al2O3 0.91 0.20 0.01 CaO -0.38 0.90 0.09 MgO 0.61 0.73 0.21 K2O 0.90 -.18 -0.21 Na2O 0.16 -0.71 0.56 TiO2 0.33 0.38 0.81 P2O5 -0.13 0.36 0.76 MnO 0.68 -0.12 0.36 TFe2O3 0.83 0.50 0.22 Corg 0.96 0.11 0.13 LOI 0.34 0.91 0.11 TN 0.97 0.04 0.13 TC 0.14 0.96 0.07 Li 0.90 0.37 0.19 V 0.74 0.60 0.27 Sb 0.52 0.69 0.15 Nb 0.29 0.11 0.88 Ta 0.12 -0.58 0.58 Zr -0.62 -0.28 0.63 砂 -0.56 -0.67 -0.38 粉砂 0.36 0.66 0.53 黏土 0.77 0.53 0.01 方差贡献/% 38.34 32.53 17.21 累积方差贡献/% 38.34 70.87 88.08
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表 4 渤海西部表层沉积物化学组分及沉积物类型相关关系
Table 4. Correlation coefficients between chemical components and sediment type in surface sediment from the western Bohai Sea
SiO2 Al2O3 CaO MgO K2O Na2O TiO2 P2O5 MnO TFe2O3 Corg LOI TN TC Li V Sb Nb Ta Zr 砂 粉砂 黏土 SiO2 1.00 Al2O3 -0.64** 1.00 CaO -0.62** -0.16 1.00 MgO -0.96** 0.80** 0.45 ** 1.00 K2O -0.25 0.85** -0.51** 0.44** 1.00 Na2O 0.39** 0.00 -0.64** -0.33* 0.08 1.00 TiO2 -0.64** 0.51** 0.26 0.67** 0.08 0.20 1.00 P2O5 -0.39** 0.13 0. 40.** 0.41** -0.23 0.11 0.77** 1.00 MnO -0.30* 0.55** -0.29 0.37* 0.44** 0.48** 0.41 ** 0.10 1.00 TFe2O3 -0.86** 0.89** 0.14 0.92** 0.63** -0.12 0.66** 0.25 0.54** 1.00 Corg -0.59** 0.92** -0.25 0.70** 0.82** 0.15 0.48** 0.02 0. 64** 0.89** 1.00 LOI -0. 97** 0.46** 0.73 ** 0.87** 0.09 -0.49** 0.52** 0.30* 0.20 0.75 ** 0.45** 1.00 TN -0.53** 0.88** -0.31* 0.63** 0.82** 0.23 0.43 ** -0.04 0. 74** 0.85** 0.97** 0.40** 1.00 TC -0.91** 0.29 0.85** 0.78** -0.08 -0.58** 0.45 ** 0.31* 0.06 0.60** 0.26 0.97 ** 0.21 1.00 Li -0.78** 0.89** 0.01 0.85** 0.70** -0.02 0.60** 0.14 0.58** 0.98** 0.93** 0.67** 0.91** 0.49** 1.00 V -0.90** 0.79** 0.27 0.92** 0.50** -0.16 0.69** 0.31* 0.49** 0.98** 0.82** 0.83** 0.78** 0.69** 0.96** 1.00 Sb -0.85** 0.57** 0.44** 0.83** 0.29 -0.33* 0.47** 0.23 0.35* 0.80** 0.56** 0.83** 0.53** 0.74** 0.76** 0.84** 1.00 Nb -0.41 ** 0.37* 0.06 0.42** 0.07 0.42** 0.79** 0.59** 0.42** 0.49** 0.39** 0.30* 0.38* 0.21 0.48** 0.53** 0.41** 1.00 Ta 0.29 0.04 -0.48** -0.24 0.10 0.66 ** 0.23 0.04 0.27 -0.07 0.09 -0.40.** 0.13 -0.46 ** 0.01 -0.10 -0.14 0.53 ** 1.00 Zr 0.37* -0.52** 0.06 -0.44 ** -0.58** 0.42** 0.20 0.42** -0.21 -0.50** -0.52** -0.38* -0.51** -0.28 -0.53** -0.44 ** -0.47 ** 0.37* 0.45** 1.00 砂 0.87** -0.65** -0.39** -0.87** -0.26 0.18 -0.74** -0.42 ** -0.46** -0.86** -0. 64** -0.82** -0.61** -0.72** -0.82** -0.91** -0.81** -0.56** 0.11 0.34* 1.00 粉砂 -0.79** 0.47** 0.46 0.77** 0.04 -0.09 0.79 ** 0.55** 0.41 ** 0.72** 0.46** 0.75 ** 0.44 ** 0.69 ** 0.66** 0. 79** 0.71** 0.60** -0.06 -0.16 -0.95** 1.00 黏土 -0.79** 0.80** 0.17 0.83** 0.61** -0.29 0.45 ** 0.08 0.43 ** 0.90** 0.79** 0.73** 0.76** 0.60** 0.88** 0.89** 0.77** 0.33* -0.18 -0.58** -0.83** 0.61** 1.00 注:使用PASS统计软件分析**代表双侧检验在J 01水平上显著相关，*代表在0.05水平上显著相关。
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表 5 渤海西部地球化学分区化学组分平均含量
Table 5. Mean chemical components in geochemical provinces in the western Bohai Sea
SiO2 Al2O3 CaO MgO K2O Na2O TiO2 P2O5 MnO TFe2O3 Corg LOI TN TC Li V Sb Nb Ta Zr Ⅰ区 57.9 12.6 7.00 2.55 2.65 3.44 0.68 0.18 0.089 4.66 0.37 8.18 0.04 1.43 36.6 76.8 0. 79 13.8 1.47 245 Ⅱ区 55.9 14.4 4.93 2.80 3.09 3.60 0.70 0.17 0.11 5.71 0.55 8.32 0.07 1.32 50.0 90.6 0.87 14.4 1.57 194 Ⅲ区 64.0 12.8 2.48 2.21 3.07 3.81 0.56 0.15 0.14 4.68 0.46 5.84 0.06 0.84 41.2 72.8 0.75 12.1 1.53 152 注：SiO2、Al2O3、TFe2O3、CaO、MgO、Na2O、K2O、TiO2、P2O5、MnO、Corg、LOI、TN、TC等化学组分含量单位为%; Li、V、Sb、Nb、Ta和Zr等微量元素含量单位为mg/kg
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