0 引言
1 区域地质背景
图1 研究区交通位置及地质略图(据文献[10],有修改)Fig.1 Traffic location and geological rough map of the study area(modified from Ref.[10]) |
2 样品采集、沉积相和岩石学特征
3 样品预处理与测试分析
表1 杨庄组样品信息及主要氧化物含量Table 1 Sample information and the content of major oxidates of Yangzhuang Formation |
样品 编号 | 岩性 | SiO2 | Al2O3 | MgO | K2O | CaO | 位置 |
---|---|---|---|---|---|---|---|
Y-29 | 硅质细晶白云岩 | 91.15 | 0.086 | 1.76 | 0.026 | 2.42 | 三段 |
Y-28 | 砂质(含砾)白云岩 | 30.72 | 6.23 | 14.81 | 3.95 | 15.56 | |
Y-27 | 粉砂质白云岩 | 24.27 | 4.03 | 16.62 | 2.53 | 19.25 | |
Y-26 | 燧石岩 | 60.5 | 0.939 | 1.47 | 0.564 | 18.99 | |
Y-25 | 白云岩 | 61.97 | 0.175 | 0.803 | 0.057 | 19.66 | |
Y-24 | 微晶白云岩 | 22.61 | 0.971 | 13 | 0.471 | 27.34 | |
Y-23 | 白云岩 | 25.64 | 3.71 | 16.61 | 2.25 | 18.82 | |
Y-22 | 含砂细晶白云岩 | 30.11 | 3.76 | 17.17 | 1.93 | 16.79 | |
Y-21 | 细晶白云岩 | 24.67 | 2.73 | 18.11 | 1.35 | 19.63 | |
Y-20 | 微晶白云岩 | 30.71 | 3.56 | 18.41 | 1.82 | 15.82 | |
Y-19 | 砂质白云岩 | 26.5 | 2.75 | 17.91 | 1.27 | 18.68 | |
Y-18 | 微—细晶白云岩 | 25.75 | 2.88 | 18.61 | 1.52 | 18.62 | |
Y-17 | 微晶白云岩 | 34.56 | 2.46 | 17.84 | 1.25 | 15.22 | |
Y-16 | 含砂细晶白云岩 | 34.06 | 3.16 | 17.65 | 1.59 | 15.24 | |
Y-15 | 炭质细晶白云岩 | 24.71 | 3.02 | 16.83 | 1.73 | 19.93 | 二段 |
Y-14 | 含燧微晶白云岩 | 33.04 | 4.64 | 15.28 | 2.48 | 16.03 | |
Y-13 | 含砂微细晶白云岩 | 28.79 | 4.48 | 16.52 | 2.46 | 16.87 | 一段 |
Y-12 | 微晶白云岩 | 32.45 | 3.99 | 14.03 | 1.78 | 16.61 | |
Y-11 | 细晶白云岩 | 27.46 | 3.83 | 16.67 | 2.12 | 18.13 | |
Y-10 | 砂质白云岩 | 27.41 | 2.58 | 17.46 | 1.42 | 19.06 | |
Y-9 | 微—细晶白云岩 | 25.78 | 3.34 | 17.89 | 1.82 | 18.68 | |
Y-8 | 含粉砂微晶白云岩 | 26.2 | 2.29 | 18.62 | 1.06 | 19.28 | |
Y-7 | 粉砂质微晶白云岩 | 24.86 | 3.06 | 17.46 | 1.72 | 19.3 | |
Y-6 | 白云质含泥粉砂岩 | 28.18 | 4.3 | 16.71 | 2.42 | 17.36 | |
Y-5 | 含粉砂微晶白云岩 | 23.33 | 2.6 | 18.66 | 1.2 | 19.75 | |
Y-4 | 微晶白云岩 | 19.53 | 0.908 | 17.97 | 0.468 | 23.69 | |
Y-3 | 含粉砂微晶白云岩 | 23.16 | 3.33 | 17.82 | 1.8 | 19.85 | |
Y-2 | 细晶白云岩 | 2.27 | 0.16 | 21.63 | 0.06 | 30.06 | |
Y-1 | 微晶白云岩 | 24.91 | 3.4 | 18.92 | 1.36 | 18.56 |
|
4 结果与讨论
4.1 地球化学特征
表 2 杨庄组碳酸盐岩稀土元素分析结果 10-6Table 2 REE concentrations (10-6) of carbonate rocks in Yangzhuang Formation 10-6 |
样品编号 | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Y | Ho | Er | Tm | Yb | Lu |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Y-29 | 0.44 | 0.69 | 0.13 | 0.55 | 0.12 | 0.02 | 0.11 | 0.02 | 0.10 | 0.59 | 0.02 | 0.05 | 0.01 | 0.05 | 0.01 |
Y-28 | 17.8 | 35.2 | 3.88 | 14.4 | 2.51 | 0.42 | 2.25 | 0.42 | 2.40 | 0.50 | 1.45 | 0.27 | 1.63 | 0.23 | 14.1 |
Y-27 | 13.6 | 25.3 | 3.05 | 11.3 | 2.01 | 0.39 | 1.73 | 0.31 | 1.67 | 0.33 | 0.90 | 0.16 | 1.05 | 0.15 | 9.43 |
Y-26 | 9.09 | 15.1 | 1.72 | 5.82 | 0.87 | 0.17 | 0.80 | 0.11 | 0.50 | 0.09 | 0.26 | 0.04 | 0.27 | 0.04 | 3.02 |
Y-25 | 1.98 | 2.42 | 0.26 | 0.94 | 0.13 | 0.04 | 0.13 | 0.02 | 0.08 | 0.50 | 0.02 | 0.04 | 0.01 | 0.05 | 0.01 |
Y-24 | 5.90 | 9.28 | 1.22 | 4.71 | 0.88 | 0.17 | 0.76 | 0.14 | 0.81 | 5.11 | 0.16 | 0.45 | 0.08 | 0.45 | 0.07 |
Y-23 | 12.4 | 21.1 | 2.79 | 10.5 | 1.94 | 0.30 | 1.65 | 0.29 | 1.65 | 0.32 | 0.89 | 0.15 | 0.96 | 0.14 | 9.16 |
Y-22 | 11.7 | 21.4 | 2.49 | 9.19 | 1.67 | 0.33 | 1.46 | 0.25 | 1.33 | 0.26 | 0.73 | 0.13 | 0.81 | 0.12 | 7.47 |
Y-21 | 9.92 | 18.4 | 2.16 | 8.02 | 1.45 | 0.33 | 1.25 | 0.22 | 1.14 | 0.24 | 0.64 | 0.11 | 0.71 | 0.10 | 6.59 |
Y-20 | 10.9 | 19.7 | 2.27 | 8.35 | 1.44 | 0.27 | 1.28 | 0.21 | 1.20 | 0.24 | 0.65 | 0.11 | 0.70 | 0.10 | 6.72 |
Y-19 | 9.51 | 17.5 | 2.02 | 7.53 | 1.33 | 0.28 | 1.16 | 0.21 | 1.09 | 0.22 | 0.62 | 0.11 | 0.67 | 0.10 | 6.15 |
Y-18 | 9.33 | 16.9 | 1.99 | 7.38 | 1.34 | 0.28 | 1.14 | 0.20 | 1.12 | 6.11 | 0.21 | 0.60 | 0.11 | 0.67 | 0.09 |
Y-17 | 8.48 | 15.3 | 1.81 | 6.80 | 1.22 | 0.50 | 1.10 | 0.18 | 0.99 | 5.43 | 0.19 | 0.54 | 0.10 | 0.55 | 0.09 |
Y-16 | 10.2 | 18.4 | 2.14 | 8.13 | 1.49 | 0.26 | 1.26 | 0.22 | 1.16 | 0.24 | 0.67 | 0.12 | 0.71 | 0.11 | 6.67 |
Y-15 | 10.1 | 18.9 | 2.25 | 8.39 | 1.52 | 0.32 | 1.35 | 0.24 | 1.28 | 0.25 | 0.71 | 0.12 | 0.75 | 0.11 | 7.17 |
Y-14 | 12.3 | 23.6 | 2.83 | 10.3 | 1.76 | 0.40 | 1.51 | 0.26 | 1.39 | 0.28 | 0.80 | 0.15 | 0.88 | 0.13 | 7.56 |
Y-13 | 12.9 | 22.7 | 2.80 | 10.4 | 1.81 | 0.34 | 1.64 | 0.28 | 1.48 | 0.30 | 0.85 | 0.15 | 0.96 | 0.14 | 8.71 |
Y-12 | 13.2 | 23.6 | 2.77 | 10.3 | 1.81 | 0.71 | 1.64 | 0.27 | 1.43 | 0.28 | 0.78 | 0.14 | 0.85 | 0.12 | 7.59 |
Y-11 | 13.5 | 25.2 | 3.01 | 11.4 | 2.11 | 0.43 | 1.74 | 0.30 | 1.71 | 0.33 | 0.92 | 0.16 | 0.98 | 0.15 | 9.34 |
Y-10 | 9.32 | 17.3 | 2.05 | 7.60 | 1.35 | 0.40 | 1.21 | 0.20 | 1.13 | 6.48 | 0.22 | 0.63 | 0.10 | 0.66 | 0.10 |
Y-9 | 10.9 | 18.8 | 2.33 | 8.71 | 1.60 | 0.61 | 1.43 | 0.24 | 1.30 | 0.25 | 0.71 | 0.12 | 0.72 | 0.10 | 6.87 |
Y-8 | 8.72 | 17.5 | 1.91 | 7.21 | 1.27 | 0.40 | 1.13 | 0.20 | 1.11 | 6.21 | 0.21 | 0.60 | 0.11 | 0.65 | 0.09 |
Y-7 | 11.5 | 20.1 | 2.38 | 8.79 | 1.51 | 0.63 | 1.37 | 0.25 | 1.36 | 0.27 | 0.75 | 0.13 | 0.82 | 0.12 | 7.81 |
Y-6 | 14.7 | 28.3 | 3.20 | 12.0 | 2.03 | 0.55 | 1.81 | 0.33 | 1.81 | 9.73 | 0.35 | 0.97 | 0.17 | 1.03 | 0.15 |
Y-5 | 7.24 | 14.3 | 1.62 | 5.97 | 1.03 | 0.27 | 0.96 | 0.17 | 0.94 | 5.28 | 0.19 | 0.52 | 0.10 | 0.55 | 0.08 |
Y-4 | 5.61 | 12.9 | 1.39 | 5.35 | 1.05 | 0.27 | 0.86 | 0.16 | 0.86 | 4.9 | 0.17 | 0.44 | 0.08 | 0.44 | 0.06 |
Y-3 | 10.7 | 21.2 | 2.32 | 8.69 | 1.50 | 0.29 | 1.39 | 0.24 | 1.33 | 0.26 | 0.72 | 0.13 | 0.77 | 0.11 | 7.23 |
Y-2 | 3.40 | 6.79 | 0.76 | 2.89 | 0.46 | 0.11 | 0.44 | 0.06 | 0.30 | 1.98 | 0.06 | 0.14 | 0.02 | 0.10 | 0.01 |
Y-1 | 9.94 | 18.4 | 2.18 | 8.24 | 1.45 | 0.38 | 1.26 | 0.23 | 1.34 | 0.26 | 0.75 | 0.13 | 0.84 | 0.12 | 7.5 |
表3 杨庄组碳酸盐岩主量(%)和部分微量元素参数分析结果 10-6Table 3 Major (%) and partial trace element concentrations (10-6) of carbonate rocks in Yangzhuang Formation 10-6 |
样品编号 | Sr | Ba | Al2O3 | Th | Sc | Ti | Zr | ∑REE+Y | LaN/YbN | δEu | δCe | LREE/HREE |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Y-29 | 6.24 | 48.1 | 0.086 | 0.074 | 0.023 | 0.016 | 0.887 | 2.89 | 0.70 | 1.01 | 0.66 | 0.53 |
Y-28 | 53.4 | 696 | 6.23 | 6.92 | 5.36 | 0.258 | 63 | 97.47 | 0.81 | 0.81 | 0.97 | 0.54 |
Y-27 | 144 | 3 181 | 4.03 | 4.99 | 3.81 | 0.215 | 31.8 | 71.38 | 0.96 | 0.98 | 0.89 | 0.64 |
Y-26 | 322 | 3 232 | 0.939 | 0.727 | 1.11 | 0.096 | 6.14 | 37.91 | 2.51 | 1.05 | 0.86 | 1.10 |
Y-25 | 70.7 | 501 | 0.175 | 0.158 | 0.229 | 0.079 | 1.37 | 6.62 | 2.92 | 1.62 | 1.01 | 1.18 |
Y-24 | 188 | 751 | 0.971 | 1.22 | 1.31 | 0.097 | 7.97 | 30.19 | 0.97 | 0.92 | 0.85 | 0.56 |
Y-23 | 36.1 | 120 | 3.71 | 4.3 | 3.4 | 0.255 | 25.3 | 64.24 | 0.95 | 0.78 | 0.82 | 0.59 |
Y-22 | 72.3 | 2 991 | 3.76 | 3.99 | 3.42 | 0.17 | 27.2 | 59.35 | 1.06 | 1.00 | 0.92 | 0.66 |
Y-21 | 90 | 3 976 | 2.73 | 3.33 | 2.79 | 0.14 | 22.4 | 51.28 | 1.04 | 1.14 | 0.91 | 0.68 |
Y-20 | 41.8 | 1 543 | 3.56 | 3.64 | 3.25 | 0.176 | 24.7 | 54.14 | 1.15 | 0.94 | 0.92 | 0.67 |
Y-19 | 54.5 | 2 724 | 2.75 | 3.26 | 2.72 | 0.129 | 23 | 48.48 | 1.06 | 1.04 | 0.93 | 0.66 |
Y-18 | 46.5 | 2 613 | 2.88 | 3.11 | 2.64 | 0.143 | 20.9 | 47.48 | 1.02 | 1.05 | 0.91 | 0.66 |
Y-17 | 225 | 1 249 | 2.46 | 2.85 | 2.68 | 0.132 | 19.2 | 43.28 | 1.13 | 2.05 | 0.92 | 0.79 |
Y-16 | 44.1 | 1 934 | 3.16 | 3.59 | 3.05 | 0.181 | 22.5 | 51.77 | 1.05 | 0.88 | 0.94 | 0.65 |
Y-15 | 83.3 | 2 663 | 3.02 | 3.49 | 3 | 0.145 | 23.8 | 53.46 | 1.00 | 1.06 | 0.91 | 0.64 |
Y-14 | 91.6 | 3 694 | 4.64 | 4.85 | 4.26 | 0.222 | 32.7 | 64.14 | 1.04 | 1.14 | 0.88 | 0.70 |
Y-13 | 68.5 | 1 668 | 4.48 | 4.64 | 4.39 | 0.236 | 30.6 | 65.44 | 1.00 | 0.92 | 0.87 | 0.63 |
Y-12 | 443 | 2 074 | 3.99 | 4.3 | 3.56 | 0.185 | 24.7 | 65.49 | 1.15 | 1.97 | 0.92 | 0.81 |
Y-11 | 141 | 4 543 | 3.83 | 4.86 | 3.68 | 0.211 | 30.4 | 71.28 | 1.01 | 1.04 | 0.92 | 0.66 |
Y-10 | 179 | 6 101 | 2.58 | 3.08 | 2.36 | 0.152 | 21.2 | 48.76 | 1.04 | 1.50 | 0.90 | 0.71 |
Y-9 | 98.2 | 2 961 | 3.34 | 3.44 | 3.49 | 0.178 | 19.1 | 54.69 | 1.12 | 1.92 | 0.87 | 0.79 |
Y-8 | 45.7 | 805 | 2.29 | 3 | 2.44 | 0.14 | 17.7 | 47.30 | 0.99 | 1.54 | 1.00 | 0.70 |
Y-7 | 66.9 | 1 819 | 3.06 | 3.98 | 33.8 | 0.169 | 23.1 | 57.78 | 1.04 | 2.04 | 0.90 | 0.74 |
Y-6 | 55.9 | 1 029 | 4.3 | 4.8 | 4.01 | 0.248 | 32.2 | 77.12 | 1.05 | 1.32 | 0.96 | 0.69 |
Y-5 | 34 | 351 | 2.6 | 2.79 | 2.5 | 0.12 | 16.2 | 39.21 | 0.98 | 1.27 | 0.94 | 0.64 |
Y-4 | 98.6 | 2 110 | 0.908 | 1.52 | 1.4 | 0.045 | 6.76 | 34.52 | 0.95 | 1.27 | 1.03 | 0.68 |
Y-3 | 34.1 | 155 | 3.33 | 3.73 | 3.13 | 0.193 | 23.3 | 56.87 | 1.03 | 0.93 | 0.99 | 0.63 |
Y-2 | 40.8 | 75 | 0.16 | 0.141 | 0.433 | 0.013 | 0.94 | 17.52 | 2.49 | 1.19 | 0.98 | 0.98 |
Y-1 | 42.2 | 636 | 3.4 | 3.86 | 3.26 | 0.186 | 24.9 | 53.02 | 0.88 | 1.29 | 0.92 | 0.63 |