Research Article
The Petrogenesis of the Permian Podong Ultramafic Intrusion in the Tarim Craton, Western China: Constraints from C-He-Ne-Ar Isotopes
Table 2
He, Ne, and Ar abundances and isotopic compositions of the magmatic mineral separates in the Podong mafic-ultramafic intrusion, western China.
| No. | Rock | Mineral | Contents (10−6 cm3·STP/g) | 3He/4He | 20Ne/22Ne | 21Ne/22Ne | 40Ar/36Ar | 4He | 20Ne | 40Ar | (Ra) | 1σ | R | 1σ | R | 1σ | R | 1σ |
| PD73-1 | Pl lherzolite | Pyx | 9.49 | 0.54 | 41.96 | 1.16 | 0.09 | 9.75 | 0.23 | 0.034 | 0.013 | 293.05 | 1.60 | PD73-2 | Olv gabbro | Olv | 33.04 | 9.55 | 359.12 | 0.62 | 0.03 | 9.65 | 0.01 | 0.029 | 0.001 | 297.86 | 0.50 | PD73-4 | Gabbro | Pl | 27.04 | 11.50 | 11.48 | 1.02 | 0.04 | 9.68 | 0.01 | 0.029 | 0.001 | 126.48 | 0.52 | PD73-5 | Gabbro | Pyx | 25.06 | 18.95 | 682.78 | 0.90 | 0.05 | 9.59 | 0.21 | 0.028 | 0.001 | 297.19 | 0.43 | PD73-6 | Gabbro | Pyx | 45.76 | 3.43 | 4.15 | 0.72 | 0.02 | 9.75 | 0.01 | 0.029 | 0.002 | 177.03 | 7.30 | PD73-7 | Gabbro | Pyx | 29.05 | 4.60 | 96.68 | 1.24 | 0.03 | 9.49 | 0.32 | 0.028 | 0.001 | 295.19 | 0.78 | PD93-1 | Pl lherzolite | Pyx | 19.75 | 0.19 | 22.34 | 0.41 | 0.04 | | | 0.031 | 0.001 | 395.2 | 1.10 | PD93-2 | Pl lherzolite | Pyx | 3.94 | 0.17 | 15.25 | 1.25 | 0.15 | 10.66 | 0.49 | 0.032 | 0.001 | 398.11 | 1.50 | PD93-3 | Gabbro | Pyx | 51.81 | 33.60 | 68.55 | 1.10 | 0.03 | 9.81 | 0.01 | 0.029 | 0.002 | 291.92 | 1.50 | PD93-4 | Olv gabbro | Olv | 41.72 | 21.26 | 744.56 | 1.03 | 0.04 | 9.70 | 0.01 | 0.029 | 0.003 | 294.92 | 0.40 | PD93-7 | Olv gabbro | Pyx | 50.24 | 14.40 | 490.15 | 1.01 | 0.04 | 9.81 | 0.01 | 0.028 | 0.001 | 301.11 | 0.52 | PD93-6 | Gabbro | Pyx | 35.07 | 11.92 | 451.08 | 0.84 | 0.04 | 9.68 | 0.01 | 0.030 | 0.001 | 296.23 | 0.51 | PD93-8 | Gabbro | Pyx | 41.69 | 1.17 | 154.42 | 0.90 | 0.03 | | | 0.023 | 0.004 | 296.15 | 0.73 | PD93-9 | Gabbro | Pyx | 27.83 | 4.83 | 185.88 | 0.98 | 0.03 | 9.31 | 0.51 | 0.028 | 0.001 | 304.69 | 0.71 | PD113-1 | Pyroxenite | Pyx | 32.70 | 0.23 | 18.24 | 0.29 | 0.02 | | | 0.031 | 0.001 | 285.29 | 9.69 |
|
|