0 引言
1 样品采集与分析
图1 川东北地区地质简图及重点探井/剖面位置Fig.1 Geological sketch and location map of key wells/sections in northeastern Sichuan Basin |
表1 川东北地区筇竹寺组烃源岩主微量元素、TOC和沉积环境指标数据Table 1 Data tables of main-trace elements, TOC and sedimentary environment indicators of source rocks of Qiangzhusi Formation in northeastern Sichuan Basin |
样品编号 | 主量元素/% | 微量元素/(μg/g) | TOC /% | 古气候 | 水动力 | 氧化—还原条件 | 生产力 | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SiO2 | Al2O3 | Fe2O3 | K2O | CaO | MgO | Na2O | TiO2 | P2O5 | MnO | Sr | Cu | Zr | Co | Ni | Rb | Mo | Th | U | Sr/Cu | Mg/Ca | Zr/Rb | Ni/Co | U/Th | Mo | P/Ti | ||
MYZ-∈1 q-B1 | 66.79 | 10.88 | 6.05 | 2.22 | 1.16 | 1.29 | 1.39 | 1.07 | 0.27 | 0.04 | 100 | 81.0 | 173.22 | 11.30 | 98.10 | 65.00 | 6.20 | 6.80 | 7.10 | 2.85 | 1.23 | 0.94 | 2.66 | 8.68 | 1.04 | 6.20 | 0.19 |
MYZ-∈1 q-B4 | 57.78 | 13.57 | 8.09 | 2.25 | 0.08 | 1.13 | 1.74 | 1.40 | 0.23 | 0.03 | 63 | 168.0 | 197.92 | 19.50 | 220.00 | 74.00 | 23.80 | 6.70 | 19.87 | 7.41 | 0.38 | 11.33 | 2.67 | 11.28 | 2.97 | 23.80 | 0.12 |
MYZ-∈1 q-B8 | 65.80 | 9.56 | 4.20 | 2.29 | 3.81 | 1.63 | 1.82 | 0.50 | 0.14 | 0.04 | 1045 | 145.0 | 60.33 | 6.50 | 53.20 | 61.00 | 3.50 | 4.90 | 5.32 | 2.79 | 7.21 | 0.11 | 0.99 | 8.18 | 1.09 | 3.50 | 0.74 |
MYZ-∈1 q-B10 | 53.50 | 6.41 | 2.83 | 1.84 | 14.93 | 2.02 | 0.86 | 0.38 | 0.39 | 0.03 | 735 | 92.4 | 59.66 | 5.80 | 45.30 | 63.00 | 3.70 | 5.00 | 7.33 | 1.93 | 7.95 | 0.16 | 0.95 | 7.81 | 1.47 | 3.70 | 1.90 |
MYZ-∈1 q-B12 | 49.80 | 6.58 | 2.77 | 1.90 | 16.15 | 3.12 | 0.62 | 0.35 | 0.92 | 0.03 | 965 | 81.2 | 49.96 | 5.70 | 44.50 | 51.60 | 1.90 | 4.10 | 4.45 | 1.42 | 11.88 | 0.14 | 0.97 | 7.81 | 1.09 | 1.90 | 1.53 |
MYZ-∈1 q-B14 | 46.44 | 5.61 | 2.73 | 1.66 | 19.11 | 3.22 | 0.57 | 0.32 | 0.66 | 0.03 | 1457 | 190.0 | 49.18 | 5.60 | 57.10 | 53.10 | 6.40 | 4.00 | 9.85 | 2.68 | 7.67 | 0.12 | 0.93 | 10.20 | 2.46 | 6.40 | 3.71 |
MYZ-∈1 q-B15 | 52.95 | 5.56 | 2.43 | 1.60 | 15.49 | 2.17 | 0.57 | 0.28 | 1.44 | 0.03 | 1426 | 101.0 | 58.30 | 6.90 | 61.20 | 65.00 | 3.70 | 4.60 | 9.83 | 2.60 | 14.12 | 0.14 | 0.90 | 8.87 | 2.14 | 3.70 | 3.95 |
MYZ-∈1 q-B18 | 51.15 | 6.03 | 2.60 | 1.71 | 16.27 | 2.64 | 0.73 | 0.32 | 1.72 | 0.03 | 1380 | 97.4 | 49.47 | 5.30 | 50.40 | 52.40 | 3.50 | 3.80 | 6.68 | 1.51 | 14.17 | 0.16 | 0.94 | 9.51 | 1.76 | 3.50 | 3.00 |
MYZ-∈1 q-B20 | 52.73 | 5.06 | 2.54 | 1.51 | 16.45 | 3.02 | 0.54 | 0.27 | 1.10 | 0.03 | 1032 | 92.2 | 28.81 | 2.10 | 20.00 | 26.30 | 1.30 | 2.20 | 20.16 | 2.80 | 11.19 | 0.04 | 1.10 | 9.52 | 9.16 | 1.30 | 33.56 |
MYZ-∈1 q-B22 | 51.30 | 6.75 | 3.03 | 1.99 | 15.17 | 3.35 | 0.66 | 0.37 | 0.37 | 0.03 | 1322 | 81.6 | 59.07 | 7.50 | 53.30 | 69.50 | 5.40 | 4.90 | 7.19 | 1.65 | 16.20 | 0.19 | 0.85 | 7.11 | 1.47 | 5.40 | 0.73 |
MYZ-∈1 q-B24 | 48.47 | 6.97 | 2.77 | 1.92 | 16.57 | 2.98 | 0.82 | 0.35 | 0.32 | 0.03 | 838 | 157.0 | 68.64 | 7.70 | 76.40 | 76.00 | 13.90 | 5.70 | 12.84 | 2.56 | 5.34 | 0.15 | 0.90 | 9.92 | 2.25 | 13.90 | 0.67 |
平均值 | 54.25 | 7.54 | 3.64 | 1.90 | 12.29 | 2.41 | 0.94 | 0.51 | 0.69 | 0.03 | 942 | 117.0 | 77.69 | 7.63 | 70.86 | 59.72 | 6.66 | 4.79 | 10.06 | 2.75 | 8.85 | 0.21 | 1.26 | 8.99 | 2.44 | 6.66 | 4.55 |
LT1-∈1 q-B11 | 49.97 | 12.53 | 5.45 | 4.23 | 3.83 | 0.69 | 0.68 | 0.23 | 5.68 | 0.08 | 406 | 63.5 | 148.00 | 16.60 | 46.40 | 115.00 | 7.43 | 7.92 | 4.00 | 0.54 | 6.39 | 0.57 | 1.29 | 2.80 | 0.51 | 7.43 | 0.24 |
LT1-∈1 q-B10 | 47.30 | 11.96 | 4.79 | 3.83 | 4.08 | 0.73 | 0.62 | 0.18 | 10.06 | 0.10 | 367 | 50.6 | 141.00 | 14.70 | 47.20 | 109.00 | 5.20 | 7.68 | 4.74 | 0.59 | 7.25 | 0.34 | 1.29 | 3.21 | 0.62 | 5.20 | 0.22 |
LT1-∈1 q-B9 | 49.86 | 12.41 | 4.86 | 4.13 | 3.83 | 0.63 | 0.63 | 0.21 | 8.52 | 0.08 | 327 | 49.2 | 139.00 | 15.00 | 48.60 | 107.00 | 3.82 | 7.63 | 4.80 | 0.60 | 6.65 | 0.38 | 1.30 | 3.24 | 0.63 | 3.82 | 0.24 |
LT1-∈1 q-B8 | 42.14 | 9.66 | 4.78 | 3.11 | 3.38 | 0.82 | 0.53 | 0.37 | 11.49 | 0.10 | 645 | 51.3 | 110.00 | 13.50 | 46.10 | 91.70 | 23.40 | 6.21 | 4.66 | 0.79 | 12.57 | 0.25 | 1.20 | 3.41 | 0.75 | 23.40 | 0.50 |
LT1-∈1 q-B7 | 48.39 | 12.24 | 4.98 | 4.08 | 3.58 | 0.74 | 0.60 | 0.23 | 7.71 | 0.08 | 415 | 52.8 | 123.00 | 15.40 | 51.80 | 112.00 | 6.35 | 7.44 | 4.14 | 0.82 | 7.85 | 0.39 | 1.10 | 3.36 | 0.56 | 6.35 | 0.28 |
LT1-∈1 q-B6 | 48.82 | 13.19 | 4.96 | 4.24 | 3.85 | 0.62 | 0.60 | 0.16 | 9.68 | 0.09 | 284 | 50.3 | 123.00 | 15.00 | 49.30 | 124.00 | 4.78 | 7.84 | 3.97 | 0.72 | 5.64 | 0.34 | 0.99 | 3.29 | 0.51 | 4.78 | 0.19 |
LT1-∈1 q-B5 | 54.55 | 11.26 | 4.10 | 4.05 | 2.26 | 1.24 | 0.73 | 0.32 | 9.37 | 0.10 | 216 | 15.7 | 192.00 | 9.93 | 27.70 | 87.50 | 2.11 | 8.28 | 3.02 | 0.22 | 13.76 | 0.20 | 2.19 | 2.79 | 0.36 | 2.11 | 0.32 |
LT1-∈1 q-B4 | 56.15 | 13.59 | 4.30 | 5.06 | 3.30 | 1.21 | 0.72 | 0.25 | 4.38 | 0.18 | 264 | 19.9 | 281.00 | 12.90 | 27.60 | 102.00 | 3.00 | 15.40 | 4.22 | 0.37 | 13.27 | 0.64 | 2.75 | 2.14 | 0.27 | 3.00 | 0.26 |
LT1-∈1 q-B3 | 50.01 | 9.81 | 3.96 | 3.41 | 2.54 | 1.15 | 0.65 | 0.46 | 12.68 | 0.18 | 268 | 18.4 | 194.00 | 9.24 | 27.40 | 73.00 | 6.66 | 7.82 | 3.32 | 0.27 | 14.57 | 0.17 | 2.66 | 2.97 | 0.42 | 6.66 | 0.51 |
LT1-∈1 q-B2 | 56.18 | 12.38 | 3.89 | 5.13 | 3.18 | 1.23 | 0.83 | 0.21 | 3.99 | 0.19 | 292 | 30.2 | 230.00 | 14.00 | 35.30 | 98.80 | 4.92 | 9.61 | 2.80 | 0.41 | 9.67 | 0.67 | 2.33 | 2.52 | 0.29 | 4.92 | 0.18 |
LT1-∈1 q-B1 | 53.09 | 12.11 | 3.80 | 4.90 | 3.22 | 0.88 | 0.77 | 0.25 | 7.04 | 0.21 | 283 | 23.6 | 194.00 | 12.20 | 29.20 | 100.00 | 3.57 | 8.84 | 2.79 | 0.31 | 11.99 | 0.39 | 1.94 | 2.39 | 0.32 | 3.57 | 0.24 |
平均值 | 50.59 | 11.92 | 4.53 | 4.20 | 3.37 | 0.90 | 0.67 | 0.26 | 8.24 | 0.13 | 342 | 38.7 | 170.45 | 13.50 | 39.69 | 101.82 | 6.48 | 8.61 | 3.86 | 0.51 | 9.97 | 0.39 | 1.73 | 2.92 | 0.48 | 6.48 | 0.29 |