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Geochemical significances of 8,14-secohopanes in marine crude oils from the Tazhong area in the Tarim Basin, NW China
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BAO Jianping,YANG Xi,ZHU Cuishan
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Table 2 Concentrations of main biomarkers and carbon isotope values of the crude oil samples from Tazhong uplift.
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| Well | Depth/m | Age | Concentration of biomarkers/(mg•g-1) | δ13C/‰ | | C19-31 tricyclic terpanes | hopanes | steranes | | TZ11 | 4 301.00-4 307.00 | S | 3.630 3 | 19.289 5 | 8.827 0 | -31.7 | | TZ30 | 4 997.00-5 026.00 | O | 2.175 6 | 25.161 3 | 11.755 4 | -32.0 | | TZ10 | 4 227.00-4 234.00 | C | 1.378 2 | 1.545 0 | 0.839 0 | -32.2 | | TZ35 | 4 946.00-4 951.00 | S | 1.642 0 | 4.578 9 | 1.453 7 | -32.5 | | TZ35 | 4 320.00-4 323.00 | C3 | 1.095 8 | 2.273 8 | 0.938 7 | -32.1 | | TZ111 | 4 357.50-4 364.00 | S | 1.887 0 | 1.943 3 | 1.022 3 | -32.2 | | TZ113 | 4 525.35-4 671.42 | S | 2.758 9 | 3.324 0 | 1.727 1 | -32.4 | | TZ117 | 4 288.29-4 304.17 | S | 3.334 3 | 2.433 7 | 1.586 8 | -32.3 | | TZ40 | 4 334.00-4 340.00 | C3 | 0.795 7 | 0.656 5 | 0.464 9 | -31.9 | | TZ47 | 4 390.50-4 402.00 | C3 | 1.819 1 | 1.663 7 | 1.042 4 | -32.2 | | TZ401 | 4 408.50-4 980.50 | C3 | 0.827 9 | 0.703 2 | 0.499 7 | -32.2 | | TZ6 | 3 647.00-3 652.50 | C | 1.205 3 | 3.761 3 | 3.066 8 | -29.8 | | TZ621 | 4 851.10-4 885.00 | O2+3 | 5.169 1 | 24.036 4 | 6.992 8 | -29.8 | | TZ70 | 4 735.00-4 770.00 | O | 1.015 7 | 2.720 7 | 1.681 0 | -31.9 | | TZ828 | 5 595.00-5 603.00 | O | 0.811 9 | 1.948 5 | 2.794 6 | -32.3 | | TZ85 | 6 313.00-6 550.00 | O | 3.429 6 | 11.361 2 | 6.355 9 | -33.4 | | TZ24 | 3 790.87-3 807.21 | C3 | 1.347 4 | 1.718 4 | 2.078 4 | -31.8 | | TZ54 | 5 747.00-5 764.00 | O | 0.959 6 | 3.553 2 | 1.796 0 | -31.8 | | TZ62 | 4 052.98-4 073.58 | S | 2.939 7 | 2.267 9 | 1.746 0 | -32.4 | | TZ74 | 4 683.40-4 699.05 | O | 0.935 6 | 3.451 0 | 1.261 1 | -31.4 | | TZ44 | 4 854.00-4 877.00 | O | 1.008 0 | 1.496 1 | 1.565 2 | -31.9 | | TZ401 | 3 244.00-3 308.00 | C1 | 0.827 9 | 0.708 1 | 0.575 0 | -33.5 | | TZ401 | 3 685.00-3 703.00 | C | 0.701 7 | 0.433 0 | 0.438 4 | -32.2 | | TZ402 | 3 246.00-3 280.00 | C1 | 0.809 3 | 0.632 9 | 0.494 7 | -33.4 | | TZ404 | 3 619.47-3 681.81 | C | 0.795 2 | 0.642 6 | 0.488 5 | -33.1 | | TZ421 | 3 570.50-3 575.00 | C3 | 0.911 4 | 0.545 2 | 0.459 2 | -32.5 | | TZ122 | 4 631.88-4 733.92 | O | 0.906 7 | 0.564 8 | 0.701 3 | -31.8 | | TZ4 | 3 532.00-3 548.00 | C2 | 0.740 2 | 0.419 3 | 0.369 8 | -32.8 | | TZ169 | 4 241.09-4 283.52 | O | 1.735 0 | 1.583 3 | 1.248 7 | -31.8 | | TZ75 | 3 701.00-3 715.00 | C | 0.883 4 | 0.579 4 | 0.516 4 | -32.9 |
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