Oil & Gas Geology ›› 2022, Vol. 43 ›› Issue (3): 648-657.doi: 10.11743/ogg20220313
• Petroleum Geology • Previous Articles Next Articles
Bojiang Fan1(), Liang Shi1, Jie Yang2, Shan Su2, Rong Ma3, Yaoli Yuan3, Cengyu Zeng1
Received:
2021-06-06
Revised:
2022-03-10
Online:
2022-06-01
Published:
2022-05-06
CLC Number:
Bojiang Fan, Liang Shi, Jie Yang, Shan Su, Rong Ma, Yaoli Yuan, Cengyu Zeng. Sedimentary environment of lacustrine organic matter in the central Ordos Basin[J]. Oil & Gas Geology, 2022, 43(3): 648-657.
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Table 1
Statistics of measured elements in Chang 7 shale, central Ordos Basin"
元素 | 含量/10-6 | |
---|---|---|
范围 | 平均值 | |
Na | 2 990.32~4 645.05 | 3 777.75 |
Mg | 3 308.94~17 719.90 | 10 166.78 |
Al | 58 133.92~92 155.36 | 76 457.26 |
Si | 202 186.51~269 343.95 | 241 139.00 |
K | 17 498.39~31 706.56 | 24 754.35 |
Ca | 6 174.31~44 762.47 | 18 647.80 |
Ti | 2 673.77~4 572.67 | 3 822.25 |
Fe | 29 800.16~54 079.39 | 43 159.72 |
Ba | 636.97~4 775.12 | 1 622.07 |
Mn | 415.69~1 779.19 | 878.16 |
P | 306.92~1 316.63 | 631.08 |
V | 32.09~169.37 | 86.13 |
Cr | 29.29~110.18 | 78.49 |
Co | 9.47~50.88 | 26.04 |
Ni | 42.09~73.01 | 57.25 |
Cu | 20.18~63.25 | 42.61 |
Zn | 71.55~124.72 | 102.85 |
Ga | 14.46~31.11 | 22.86 |
As | 5.93~50.25 | 16.88 |
Pb | 13.01~33.69 | 18.72 |
Th | 7.84~17.44 | 12.67 |
U | 2.09~17.54 | 7.57 |
Y | 27.75~41.23 | 32.98 |
Zr | 90.93~190.26 | 139.23 |
Nb | 8.58~15.48 | 11.33 |
Mo | 0.19~7.03 | 2.75 |
Rb | 95.02~211.47 | 157.28 |
Sr | 303.15~508.52 | 391.40 |
Table 2
Enrichment factors of trace elements in Chang 7 shale, central Ordos Basin"
微量元素 | EF值 | 微量元素 | EF值 |
---|---|---|---|
Ba | 1.14~8.57(2.91) | As | 4.62~39.08(13.13) |
Ni | 0.82~1.42(1.11) | Pb | 0.76~1.97(1.09) |
U | 0.79~6.60(2.85) | Th | 0.63~1.39(1.01) |
V | 0.27~1.41(0.72) | Y | 1.20~1.78(1.42) |
Cr | 0.34~1.29(0.92) | Zr | 0.51~1.06(0.77) |
Co | 0.55~2.97(1.52) | Nb | 0.56~1.00(0.73) |
Cu | 0.47~1.48(0.99) | Mo | 0.22~8.20(3.20) |
Zn | 0.98~1.71(1.41) | Rb | 0.69~1.54(1.15) |
Ga | 0.84~1.81(1.33) | Sr | 1.77~2.97(2.28) |
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