中下扬子北缘中二叠统孤峰组层状硅质岩沉积环境、成因及硅质来源探讨
|
赵振洋, 李双建, 王根厚
|
Discussion on Sedimentary Environments,Origin and Source of Middle Permian Gufeng Formation Bedded Cherts in theNorthern Margin of the Middle-Lower Yangtze Area
|
Zhenyang Zhao, Shuangjian Li, Genhou Wang
|
|
表2 硅质岩主量元素、稀土元素含量、指标及数据来源
|
Table 2 Major, rare Earth elements content, index and data source of cherts
|
|
元素含量 及指标 采样地 | 秭归白马岭1 | 贵池唐田2 | 铜陵花树坡3 | 巢湖庵门口4 | 巢湖平顶山5 | 巢湖平顶山5* | 巢湖平顶山5** | 鄂西猫儿山6 | 恩施田风坪7 | 宣城水东8 | 黄山—泾县9 |
---|
主量元素/% | SiO2 | 89.85 | 89.60 | 68.52 | 92.99 | 95.12 | 91.82 | 93.24 | 87.02 | 85.24 | 97.19 | 92.60 | TiO2 | 0.06 | 0.19 | 0.22 | 0.04 | 0.10 | 0.06 | 0.04 | 0.07 | 0.09 | 0.05 | 0.13 | Al2O3 | 1.18 | 3.45 | 5.33 | 1.24 | 1.62 | 2.67 | 1.08 | 1.62 | 1.80 | 1.13 | 3.03 | TFe2O3 | 1.93 | 3.61 | 1.66 | 0.62 | 0.58 | 2.14 | 1.40 | 0.52 | 2.22 | 0.61 | 1.12 | MnO | 0.02 | 0.62 | 0.54 | 0.00 | 0.02 | 0.01 | 0.02 | 0.01 | 0.02 | 0.00 | 0.00 | MgO | 0.14 | 0.28 | 0.96 | 0.06 | 0.11 | 0.05 | 0.09 | 0.28 | 0.17 | 0.06 | 0.23 | CaO | 0.46 | 0.17 | 17.10 | 0.21 | 0.13 | 0.32 | 0.29 | 0.28 | 0.24 | 0.12 | 0.01 | Na2O | 0.04 | 0.05 | 0.44 | 0.13 | 0.07 | 0.78 | 0.04 | 0.04 | 0.03 | <0.01 | 0.03 | K2O | 0.22 | 0.58 | 3.70 | 0.20 | 0.08 | 0.21 | 0.12 | 0.31 | 0.30 | 0.16 | 0.47 | Al2O3/(Al2O3+Fe2O3) | 0.38 | 0.49 | 0.76 | 0.67 | 0.74 | 0.56 | 0.44 | 0.76 | 0.45 | 0.65 | 0.73 | Fe2O3/TiO2 | 32.12 | 19.50 | 7.53 | 15.32 | 5.60 | 37.16 | 38.14 | 7.68 | 25.60 | 11.69 | 8.78 | MnO/TiO2 | 0.28 | 3.35 | 2.45 | 0.05 | 0.16 | 0.22 | 0.43 | 0.15 | 0.19 | 0.01 | 0.03 | 稀土元素/(×106) | La | 5.51 | 9.32 | 16.00 | 4.69 | 5.69 | 6.49 | 3.72 | 5.92 | 8.61 | 3.58 | 13.42 | Ce | 8.62 | 13.00 | 23.20 | 8.21 | 11.11 | 61.24 | 5.50 | 6.05 | 9.41 | 5.02 | 25.34 | Pr | 1.12 | 1.78 | 3.66 | 1.12 | 1.49 | 1.47 | 0.84 | 1.14 | 1.83 | 0.81 | 3.31 | Nd | 4.82 | 8.65 | 14.60 | 4.73 | 6.97 | 6.08 | 3.27 | 4.26 | 7.25 | 3.53 | 11.90 | Sm | 0.92 | 2.59 | 2.67 | 0.96 | 1.45 | 1.08 | 0.69 | 0.80 | 1.50 | 0.69 | 2.30 | Eu | 0.17 | 0.64 | 0.50 | 0.19 | 0.32 | 0.24 | 0.14 | 0.16 | 0.29 | 0.13 | 0.47 | Gd | 1.04 | 3.20 | 3.02 | 1.01 | 1.71 | 1.14 | 0.66 | 0.90 | 1.50 | 0.56 | 2.01 | Tb | 0.16 | 0.50 | 0.44 | 0.15 | 0.28 | 0.19 | 0.13 | 0.14 | 0.25 | 0.06 | 0.30 | Dy | 0.92 | 3.16 | 2.88 | 0.89 | 1.73 | 1.13 | 0.66 | 0.88 | 1.51 | 0.40 | 1.79 | Ho | 0.22 | 0.73 | 0.60 | 0.19 | 0.32 | 0.26 | 0.16 | 0.20 | 0.33 | 0.07 | 0.34 | Er | 0.64 | 1.97 | 1.78 | 0.54 | 0.89 | 0.73 | 0.43 | 0.59 | 0.95 | 0.19 | 0.95 | Tm | 0.10 | 0.29 | 0.29 | 0.08 | 0.12 | 0.12 | 0.09 | 0.09 | 0.14 | 0.03 | 0.13 | Yb | 0.57 | 1.73 | 0.32 | 0.49 | 0.67 | 0.64 | 0.41 | 0.56 | 0.94 | 0.20 | 0.85 | Lu | 0.08 | 0.27 | 1.83 | 0.08 | 0.09 | 0.11 | 0.09 | 0.09 | 0.14 | 0.03 | 0.13 | LREE | 21.16 | 35.96 | 60.63 | 19.90 | 27.03 | 76.60 | 14.16 | 18.33 | 28.90 | 13.76 | 56.74 | HREE | 9.81 | 11.84 | 30.86 | 3.42 | 17.56 | 4.30 | 2.61 | 3.45 | 5.76 | 1.54 | 6.51 | LREE/HREE | 2.16 | 3.12 | 1.96 | 6.74 | 2.08 | 22.37 | 4.95 | 5.71 | 5.27 | 10.34 | 8.91 | ∑REE | 24.89 | 47.80 | 91.49 | 23.32 | 44.59 | 80.90 | 16.77 | 21.78 | 34.66 | 15.30 | 63.25 | LaN/CeN | 1.31 | 1.36 | 1.42 | 1.23 | 1.04 | 0.23 | 1.89 | 2.04 | 1.83 | 1.67 | 1.14 | LaN/YbN | 0.91 | 0.50 | 4.70 | 0.99 | 0.98 | 0.98 | 0.78 | 1.00 | 0.91 | 2.03 | 1.41 | δCe | 0.80 | 0.85 | 0.70 | 0.81 | 0.90 | 6.87 | 0.60 | 0.54 | 0.56 | 0.65 | 0.87 | δEu | 0.77 | 0.97 | 0.78 | 0.88 | 0.90 | 0.96 | 1.49 | 0.86 | 0.87 | 0.89 | 0.90 | 参考文献 | [43] | [44] | [45] | [6] | [46] | [47] | [48] | [49] | [50] | [51] | [52] |
|
|
|