0 引言
1 地质背景
2 样品采集与实验方法
3 实验结果
3.1 岩石学特征
3.1.1 剖面及薄片观察
图5 研究区细粒沉积岩镜下特征及宏观特征(a)黑色泥岩,峨边葛村剖面;(b)灰绿色粉砂岩,峨边老鸦村剖面;(c)炭质页岩样品,56 m;(d)灰绿色粉砂质泥岩样品,34 m;(e)砂质泥岩,238.5 m,单偏光;(f)砂质泥岩,238.5 m,正交光;(g)含泥粉砂岩,126 m,单偏光;(h)含泥粉砂岩,126 m,正交光;(i)黑色泥页岩,65 m,单偏光;(j)黑色泥页岩,65 m,正交光;(k)纹层,77.5 m,单偏光;(l)纹层,77.5 m,正交光;(m)砂质透镜体,30.2 m,单偏光;(n)砂质透镜体,30.2 m,正交光;(o)条带状有机质,24 m,单偏光;(p)条带状有机质,24 m,正交光 Fig.5 Microscopic and macroscopic characteristics of fine-grained sedimentary rocks in the study area |
3.1.2 XRD分析结果
3.2 TOC含量
3.3 主微量元素特征
表1 研究区样品主要元素分析结果Table 1 Analysis results of main elements of samples in the study area |
样品编号 | 深度/m | 主量元素含量/% | 微量元素含量/10-6 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Al2O3 | CaO | MgO | Na2O | K2O | P2O5 | MnO | Mo | V | Cr | Ni | Cu | Co | ||
S1 | 262.0 | 16.062 | 0.254 | 2.925 | 0.245 | 5.714 | 0.260 | 0.083 | 1.06 | 96.58 | 91.62 | 32.17 | 28.64 | 19.92 |
S2 | 258.0 | 16.121 | 0.380 | 4.380 | 0.651 | 4.921 | 0.276 | 0.040 | 0.65 | 95.24 | 48.35 | 35.61 | 38.66 | 10.86 |
S3 | 239.0 | 15.709 | 0.393 | 4.245 | 0.689 | 4.865 | 0.283 | 0.040 | 0.62 | 93.82 | 47.43 | 35.29 | 38.21 | 12.02 |
S4 | 237.5 | 15.071 | 1.278 | 5.444 | 0.660 | 4.782 | 0.228 | 0.064 | 1.96 | 106.29 | 53.53 | 46.25 | 27.05 | 20.83 |
S5 | 237 | 15.774 | 1.012 | 5.500 | 0.584 | 4.886 | 0.232 | 0.056 | 1.49 | 123.55 | 61.28 | 46.71 | 22.76 | 21.34 |
S6 | 223 | 15.194 | 1.091 | 5.359 | 0.693 | 4.759 | 0.244 | 0.050 | 1.28 | 110.57 | 49.41 | 42.93 | 18.34 | 19.11 |
S7 | 221 | 14.950 | 1.208 | 5.389 | 0.722 | 4.699 | 0.249 | 0.050 | 1.11 | 103.00 | 51.21 | 39.67 | 18.44 | 16.55 |
S8 | 183 | 12.456 | 3.458 | 5.744 | 0.352 | 4.770 | 0.275 | 0.078 | 0.51 | 72.77 | 36.41 | 21.53 | 5.68 | 9.97 |
S9 | 177 | 17.417 | 0.619 | 3.334 | 0.323 | 7.506 | 0.482 | 0.087 | 0.42 | 69.56 | 32.59 | 19.16 | 4.89 | 10.52 |
S10 | 161 | 14.958 | 0.704 | 4.368 | 0.182 | 5.942 | 0.414 | 0.069 | 0.54 | 86.98 | 48.25 | 28.83 | 5.25 | 10.39 |
S11 | 160 | 14.685 | 2.839 | 5.724 | 0.323 | 5.434 | 0.288 | 0.065 | 0.51 | 87.72 | 39.92 | 27.12 | 4.51 | 9.04 |
S12 | 157 | 13.910 | 3.130 | 5.721 | 0.353 | 5.330 | 0.283 | 0.071 | 0.45 | 81.42 | 41.53 | 25.79 | 20.26 | 8.61 |
S13 | 100 | 14.195 | 0.711 | 3.428 | 0.188 | 6.247 | 0.570 | 0.114 | 0.51 | 73.00 | 41.87 | 24.09 | 3.66 | 7.32 |
S14 | 89.0 | 15.275 | 0.542 | 2.495 | 0.193 | 8.054 | 0.439 | 0.028 | 0.44 | 100.51 | 54.65 | 24.99 | 7.30 | 10.57 |
S15 | 86.0 | 14.996 | 1.832 | 3.615 | 0.179 | 7.597 | 0.299 | 0.055 | 1.06 | 91.55 | 54.83 | 30.79 | 11.81 | 15.93 |
S16 | 81.0 | 10.494 | 4.671 | 4.813 | 0.167 | 6.053 | 0.294 | 0.102 | 0.55 | 47.20 | 40.22 | 12.21 | 4.79 | 5.37 |
S17 | 77.0 | 12.010 | 5.412 | 6.880 | 0.167 | 5.198 | 2.488 | 0.066 | 0.77 | 84.41 | 57.54 | 25.50 | 14.38 | 22.54 |
S18 | 76.0 | 4.515 | 15.460 | 14.316 | 0.122 | 1.608 | 0.443 | 0.186 | 1.19 | 21.06 | 32.14 | 6.58 | 6.73 | 3.12 |
S19 | 75.8 | 12.491 | 3.545 | 4.385 | 0.171 | 6.703 | 0.481 | 0.084 | 1.31 | 88.25 | 65.92 | 20.26 | 8.94 | 9.14 |
S20 | 74.0 | 11.427 | 4.994 | 5.518 | 0.166 | 5.456 | 1.235 | 0.085 | 2.86 | 72.00 | 55.50 | 19.92 | 10.96 | 9.57 |
S21 | 69.0 | 15.987 | 1.748 | 4.138 | 0.169 | 6.031 | 0.354 | 0.052 | 1.26 | 149.63 | 96.36 | 45.87 | 22.92 | 14.38 |
S22 | 66.0 | 11.954 | 4.761 | 5.173 | 0.162 | 5.316 | 0.415 | 0.099 | 2.41 | 83.46 | 68.08 | 27.32 | 18.28 | 9.22 |
S23 | 57.5 | 14.239 | 4.293 | 4.704 | 0.167 | 5.548 | 0.922 | 0.086 | 2.65 | 170.77 | 80.16 | 43.88 | 29.27 | 10.83 |
S24 | 56.0 | 16.133 | 1.641 | 3.914 | 0.162 | 6.136 | 0.283 | 0.053 | 9.08 | 202.39 | 60.66 | 58.62 | 62.98 | 22.55 |
S25 | 46.0 | 16.582 | 1.666 | 4.370 | 0.166 | 5.729 | 0.238 | 0.057 | 2.32 | 217.11 | 69.29 | 55.30 | 78.29 | 20.65 |
S26 | 45.0 | 16.762 | 2.140 | 4.865 | 0.162 | 5.390 | 0.222 | 0.063 | 2.88 | 205.77 | 69.69 | 53.93 | 66.47 | 19.41 |
S27 | 43.8 | 16.663 | 2.118 | 4.851 | 0.163 | 5.394 | 0.228 | 0.063 | 1.30 | 203.61 | 62.76 | 51.91 | 74.63 | 19.29 |
S28 | 41.5 | 16.510 | 2.406 | 5.059 | 0.160 | 5.209 | 0.220 | 0.070 | 1.48 | 193.49 | 60.73 | 50.60 | 81.64 | 19.13 |
S29 | 32.0 | 14.526 | 3.985 | 5.523 | 0.166 | 5.665 | 0.199 | 0.061 | 1.62 | 167.36 | 68.07 | 46.56 | 46.60 | 20.24 |
S30 | 30.0 | 16.454 | 1.681 | 4.554 | 0.171 | 6.301 | 0.237 | 0.043 | 1.25 | 184.75 | 58.86 | 51.47 | 39.67 | 23.69 |
S31 | 27.5 | 16.439 | 1.984 | 5.126 | 0.164 | 5.711 | 0.266 | 0.045 | 1.29 | 201.36 | 63.75 | 62.45 | 36.33 | 26.73 |