Geoscience ›› 2021, Vol. 35 ›› Issue (06): 1702-1712.DOI: 10.19657/j.geoscience.1000-8527.2021.121
• Gold-polymetallic Mineralization in Qinling Orogens • Previous Articles Next Articles
XIE Gen1,2(), YU Guangming2, LU Yingchuan2,3, FENG Xin1,2, TIAN Guanghao1,2, WANG Ran1,2, WANG Jian4
Received:
2021-08-11
Revised:
2021-11-02
Online:
2021-12-10
Published:
2022-02-14
CLC Number:
XIE Gen, YU Guangming, LU Yingchuan, FENG Xin, TIAN Guanghao, WANG Ran, WANG Jian. Chronology and Geochemical Characteristics of Granitic Gneiss in Xiaoqinling District on the Southern Margin of North China Craton and Its Significance[J]. Geoscience, 2021, 35(06): 1702-1712.
Fig.1 Subdivisions of the North China Craton, showing the study area location ((a), modified from reference [13]), the study area location in the Xiaoqinling gold field ((b), modified from reference [15]), and simplified geological map of the Dahu Au-Mo deposit ((c), modified from reference [16])
测试 点号 | 分组 | 含量/10-6 | Th/U | 同位素比值 ±1σ | (年龄±1σ)/Ma | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
U | Th | 207Pb/206Pb | 207Pb/235U | 206Pb/238U | 207Pb/206Pb | 207Pb/235U | 206Pb/238U | ||||
1 | Ⅰ | 250 | 106 | 0.42 | 0.160 5±0.5 | 10.404 9±1.6 | 0.470 3±1.6 | 2 460.4±8.2 | 2 471.5±15.2 | 2 484.9±32.2 | |
2 | Ⅰ | 323 | 100 | 0.31 | 0.162 5±0.4 | 10.281 9±1.5 | 0.458 8±1.5 | 2 482.3±6.2 | 2 460.5±14.4 | 2 434.1±30.5 | |
6 | Ⅰ | 409 | 140 | 0.34 | 0.155 5±0.4 | 9.555 9±1.6 | 0.445 8±1.5 | 2 407.0±7.3 | 2 392.9±14.5 | 2 376.4±29.9 | |
14 | Ⅰ | 464 | 146 | 0.31 | 0.155 6±0.4 | 9.774 0±1.5 | 0.455 4±1.5 | 2 408.9±6.3 | 2 413.7±14.4 | 2 419.4±30.4 | |
17 | Ⅰ | 425 | 93 | 0.22 | 0.155 3±0.4 | 9.074 7±1.6 | 0.423 7±1.5 | 2 405.5±7.1 | 2 345.6±14.4 | 2 277.3±28.9 | |
7 | ? | 582 | 556 | 0.96 | 0.119 9±0.4 | 5.950 0±1.5 | 0.359 8±1.5 | 1 955.3±6.4 | 1 968.6±13.5 | 1 981.2±25.6 | |
16 | ? | 1 544 | 222 | 0.14 | 0.136 3±0.2 | 7.677 4±1.5 | 0.408 5±1.5 | 2 180.7±3.5 | 2 194.0±13.7 | 2 208.2±28.1 | |
15 | Ⅱ | 275 | 6 | 0.02 | 0.114 1±0.5 | 5.270 5±1.6 | 0.335 1±1.5 | 1 865.0±9.1 | 1 864.1±13.6 | 1 863.3±24.3 | |
3 | Ⅱ | 378 | 354 | 0.94 | 0.111 4±0.4 | 5.060 3±1.6 | 0.329 4±1.5 | 1 822.9±7.9 | 1 829.5±13.3 | 1 835.2±24.0 | |
4 | Ⅱ | 1 075 | 1 565 | 1.46 | 0.111 4±0.3 | 5.054 3±1.5 | 0.328 9±1.5 | 1 823.1±4.6 | 1 828.5±13.0 | 1 833.2±24.0 | |
5 | Ⅱ | 184 | 102 | 0.55 | 0.112 0±0.6 | 5.048 8±1.6 | 0.327 1±1.5 | 1 831.4±10.9 | 1 827.5±14.0 | 1 824.1±24.3 | |
8 | Ⅱ | 552 | 513 | 0.93 | 0.111 2±0.5 | 5.105 3±1.6 | 0.332 9±1.5 | 1 819.6±8.7 | 1 837.0±13.5 | 1 852.4±24.2 | |
9 | Ⅱ | 605 | 724 | 1.20 | 0.110 1±0.3 | 5.096 9±1.6 | 0.335 8±1.6 | 1 801.0±6.1 | 1 835.6±13.6 | 1 866.2±25.3 | |
10 | Ⅱ | 729 | 735 | 1.01 | 0.111 5±0.3 | 5.083 7±1.5 | 0.330 7±1.5 | 1 824.0±5.5 | 1 833.4±13.2 | 1 841.7±24.3 | |
11 | Ⅱ | 354 | 401 | 1.13 | 0.111 7±0.4 | 5.052 3±1.6 | 0.328 0±1.5 | 1 827.6±8.0 | 1 828.1±13.5 | 1 828.6±24.2 | |
12 | Ⅱ | 811 | 811 | 1.00 | 0.112 1±0.3 | 5.211 9±1.5 | 0.337 4±1.5 | 1 832.9±5.8 | 1 854.6±13.2 | 1 873.9±24.4 | |
13 | Ⅱ | 1 418 | 2 623 | 1.85 | 0.111 0±0.3 | 5.049 3±1.5 | 0.329 9±1.5 | 1 815.9±4.8 | 1 827.6±13.0 | 1 837.9±24.1 | |
18 | Ⅱ | 689 | 868 | 1.26 | 0.111 5±0.3 | 5.338 6±1.5 | 0.347 1±1.5 | 1 824.7±6.3 | 1 875.1±13.3 | 1 920.8±25.0 | |
19 | Ⅱ | 97 | 42 | 0.43 | 0.110 1±0.8 | 5.135 2±1.7 | 0.338 4±1.5 | 1 800.6±15.3 | 1 841.9±14.8 | 1 878.8±24.6 | |
20 | Ⅱ | 1 144 | 1 692 | 1.48 | 0.111 9±0.2 | 5.119 8±1.5 | 0.331 9±1.5 | 1 829.9±4.5 | 1 839.4±13.0 | 1 847.8±24.2 |
Table 1 Results of SIMS zircon U-Pb isotope data of the wallrocks in the Dahu Au-Mo deposit
测试 点号 | 分组 | 含量/10-6 | Th/U | 同位素比值 ±1σ | (年龄±1σ)/Ma | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
U | Th | 207Pb/206Pb | 207Pb/235U | 206Pb/238U | 207Pb/206Pb | 207Pb/235U | 206Pb/238U | ||||
1 | Ⅰ | 250 | 106 | 0.42 | 0.160 5±0.5 | 10.404 9±1.6 | 0.470 3±1.6 | 2 460.4±8.2 | 2 471.5±15.2 | 2 484.9±32.2 | |
2 | Ⅰ | 323 | 100 | 0.31 | 0.162 5±0.4 | 10.281 9±1.5 | 0.458 8±1.5 | 2 482.3±6.2 | 2 460.5±14.4 | 2 434.1±30.5 | |
6 | Ⅰ | 409 | 140 | 0.34 | 0.155 5±0.4 | 9.555 9±1.6 | 0.445 8±1.5 | 2 407.0±7.3 | 2 392.9±14.5 | 2 376.4±29.9 | |
14 | Ⅰ | 464 | 146 | 0.31 | 0.155 6±0.4 | 9.774 0±1.5 | 0.455 4±1.5 | 2 408.9±6.3 | 2 413.7±14.4 | 2 419.4±30.4 | |
17 | Ⅰ | 425 | 93 | 0.22 | 0.155 3±0.4 | 9.074 7±1.6 | 0.423 7±1.5 | 2 405.5±7.1 | 2 345.6±14.4 | 2 277.3±28.9 | |
7 | ? | 582 | 556 | 0.96 | 0.119 9±0.4 | 5.950 0±1.5 | 0.359 8±1.5 | 1 955.3±6.4 | 1 968.6±13.5 | 1 981.2±25.6 | |
16 | ? | 1 544 | 222 | 0.14 | 0.136 3±0.2 | 7.677 4±1.5 | 0.408 5±1.5 | 2 180.7±3.5 | 2 194.0±13.7 | 2 208.2±28.1 | |
15 | Ⅱ | 275 | 6 | 0.02 | 0.114 1±0.5 | 5.270 5±1.6 | 0.335 1±1.5 | 1 865.0±9.1 | 1 864.1±13.6 | 1 863.3±24.3 | |
3 | Ⅱ | 378 | 354 | 0.94 | 0.111 4±0.4 | 5.060 3±1.6 | 0.329 4±1.5 | 1 822.9±7.9 | 1 829.5±13.3 | 1 835.2±24.0 | |
4 | Ⅱ | 1 075 | 1 565 | 1.46 | 0.111 4±0.3 | 5.054 3±1.5 | 0.328 9±1.5 | 1 823.1±4.6 | 1 828.5±13.0 | 1 833.2±24.0 | |
5 | Ⅱ | 184 | 102 | 0.55 | 0.112 0±0.6 | 5.048 8±1.6 | 0.327 1±1.5 | 1 831.4±10.9 | 1 827.5±14.0 | 1 824.1±24.3 | |
8 | Ⅱ | 552 | 513 | 0.93 | 0.111 2±0.5 | 5.105 3±1.6 | 0.332 9±1.5 | 1 819.6±8.7 | 1 837.0±13.5 | 1 852.4±24.2 | |
9 | Ⅱ | 605 | 724 | 1.20 | 0.110 1±0.3 | 5.096 9±1.6 | 0.335 8±1.6 | 1 801.0±6.1 | 1 835.6±13.6 | 1 866.2±25.3 | |
10 | Ⅱ | 729 | 735 | 1.01 | 0.111 5±0.3 | 5.083 7±1.5 | 0.330 7±1.5 | 1 824.0±5.5 | 1 833.4±13.2 | 1 841.7±24.3 | |
11 | Ⅱ | 354 | 401 | 1.13 | 0.111 7±0.4 | 5.052 3±1.6 | 0.328 0±1.5 | 1 827.6±8.0 | 1 828.1±13.5 | 1 828.6±24.2 | |
12 | Ⅱ | 811 | 811 | 1.00 | 0.112 1±0.3 | 5.211 9±1.5 | 0.337 4±1.5 | 1 832.9±5.8 | 1 854.6±13.2 | 1 873.9±24.4 | |
13 | Ⅱ | 1 418 | 2 623 | 1.85 | 0.111 0±0.3 | 5.049 3±1.5 | 0.329 9±1.5 | 1 815.9±4.8 | 1 827.6±13.0 | 1 837.9±24.1 | |
18 | Ⅱ | 689 | 868 | 1.26 | 0.111 5±0.3 | 5.338 6±1.5 | 0.347 1±1.5 | 1 824.7±6.3 | 1 875.1±13.3 | 1 920.8±25.0 | |
19 | Ⅱ | 97 | 42 | 0.43 | 0.110 1±0.8 | 5.135 2±1.7 | 0.338 4±1.5 | 1 800.6±15.3 | 1 841.9±14.8 | 1 878.8±24.6 | |
20 | Ⅱ | 1 144 | 1 692 | 1.48 | 0.111 9±0.2 | 5.119 8±1.5 | 0.331 9±1.5 | 1 829.9±4.5 | 1 839.4±13.0 | 1 847.8±24.2 |
样品 编号 | SiO2 | Al2O3 | Fe2O3 | FeO | CaO | MgO | K2O | Na2O | TiO2 | MnO | P2O5 | 烧失量 | 总量 | K2O+ Na2O | K2O/ Na2O | A/CNK | A/NK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
F7-017 | 56.23 | 16.44 | 2.42 | 5.77 | 6.33 | 3.61 | 1.99 | 3.81 | 0.99 | 0.20 | 0.26 | 0.74 | 99.37 | 5.80 | 0.52 | 0.97 | 1.94 |
F7-037 | 75.99 | 12.91 | 0.18 | 0.48 | 1.28 | 0.20 | 3.57 | 4.02 | 0.11 | 0.02 | 0.01 | 0.50 | 99.32 | 7.59 | 0.89 | 1.00 | 1.15 |
F7-039 | 73.14 | 13.81 | 0.39 | 0.25 | 0.69 | 0.30 | 7.29 | 1.82 | 0.13 | 0.01 | 0.04 | 1.46 | 99.34 | 9.11 | 4.01 | 0.93 | 0.99 |
F7-040 | 71.53 | 13.20 | 1.76 | 0.25 | 0.94 | 0.08 | 8.29 | 1.24 | 0.13 | 0.01 | 0.02 | 1.90 | 99.37 | 9.53 | 6.69 | 0.83 | 0.90 |
样品 编号 | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | LREE/ HREE | REE | δEu |
F7-017 | 25.49 | 65.06 | 9.26 | 38.43 | 8.04 | 1.55 | 7.35 | 1.26 | 7.93 | 1.65 | 4.74 | 0.74 | 4.99 | 0.78 | 5.02 | 177.27 | 0.62 |
F7-037 | 63.55 | 100.07 | 9.70 | 27.38 | 3.65 | 0.23 | 3.58 | 0.49 | 3.02 | 0.68 | 2.16 | 0.38 | 2.80 | 0.50 | 15.03 | 218.19 | 0.19 |
F7-039 | 65.90 | 127.69 | 13.11 | 37.69 | 4.43 | 0.80 | 3.09 | 0.30 | 0.93 | 0.13 | 0.28 | 0.04 | 0.22 | 0.03 | 49.75 | 254.63 | 0.66 |
F7-040 | 77.62 | 142.28 | 14.29 | 40.26 | 5.12 | 0.86 | 3.59 | 0.34 | 1.19 | 0.20 | 0.54 | 0.07 | 0.44 | 0.06 | 43.48 | 286.87 | 0.61 |
样品 编号 | Y | Zr | Hf | Rb | Sr | Nb | Ba | Ta | Th | Li | Be | Sc | Co | Ni | Cu | Zn | Ga |
F7-017 | 42.04 | 133.31 | 4.06 | 97.98 | 217.41 | 11.14 | 267.83 | 0.83 | 7.69 | 31.08 | 2.04 | 22.65 | 20.35 | 8.79 | 6.76 | 104.14 | 20.06 |
F7-037 | 20.65 | 123.93 | 4.70 | 226.86 | 61.49 | 8.11 | 33.20 | 1.74 | 136.53 | 7.13 | 3.57 | 0.75 | 1.24 | 0.57 | 1.96 | 20.83 | 15.23 |
F7-039 | 3.67 | 115.17 | 3.78 | 138.84 | 261.11 | 4.13 | 1 248.52 | 0.19 | 18.82 | 3.48 | 0.96 | 1.67 | 2.22 | 1.33 | 5.58 | 10.45 | 16.48 |
F7-040 | 5.59 | 35.87 | 1.38 | 190.48 | 284.57 | 32.41 | 2 308.30 | 0.30 | 14.61 | 1.19 | 1.04 | 0.90 | 5.47 | 1.36 | 7.89 | 7.36 | 18.19 |
样品 编号 | Cs | Pb | U | Bi | V | Cr | Tl | ||||||||||
F7-017 | 4.17 | 12.43 | 1.19 | 0.09 | 165.20 | 17.30 | 0.63 | ||||||||||
F7-037 | 11.74 | 30.06 | 17.89 | 6.45 | 8.95 | 1.76 | 0.66 | ||||||||||
F7-039 | 1.44 | 17.10 | 1.12 | 1.06 | 15.63 | 4.16 | 0.62 | ||||||||||
F7-040 | 1.27 | 15.42 | 0.91 | 3.77 | 11.03 | 1.87 | 0.72 |
Table 2 Whole-rock major (%) and trace element (10-6) contents for the ores and wallrocks in the Dahu Au-Mo deposit
样品 编号 | SiO2 | Al2O3 | Fe2O3 | FeO | CaO | MgO | K2O | Na2O | TiO2 | MnO | P2O5 | 烧失量 | 总量 | K2O+ Na2O | K2O/ Na2O | A/CNK | A/NK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
F7-017 | 56.23 | 16.44 | 2.42 | 5.77 | 6.33 | 3.61 | 1.99 | 3.81 | 0.99 | 0.20 | 0.26 | 0.74 | 99.37 | 5.80 | 0.52 | 0.97 | 1.94 |
F7-037 | 75.99 | 12.91 | 0.18 | 0.48 | 1.28 | 0.20 | 3.57 | 4.02 | 0.11 | 0.02 | 0.01 | 0.50 | 99.32 | 7.59 | 0.89 | 1.00 | 1.15 |
F7-039 | 73.14 | 13.81 | 0.39 | 0.25 | 0.69 | 0.30 | 7.29 | 1.82 | 0.13 | 0.01 | 0.04 | 1.46 | 99.34 | 9.11 | 4.01 | 0.93 | 0.99 |
F7-040 | 71.53 | 13.20 | 1.76 | 0.25 | 0.94 | 0.08 | 8.29 | 1.24 | 0.13 | 0.01 | 0.02 | 1.90 | 99.37 | 9.53 | 6.69 | 0.83 | 0.90 |
样品 编号 | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | LREE/ HREE | REE | δEu |
F7-017 | 25.49 | 65.06 | 9.26 | 38.43 | 8.04 | 1.55 | 7.35 | 1.26 | 7.93 | 1.65 | 4.74 | 0.74 | 4.99 | 0.78 | 5.02 | 177.27 | 0.62 |
F7-037 | 63.55 | 100.07 | 9.70 | 27.38 | 3.65 | 0.23 | 3.58 | 0.49 | 3.02 | 0.68 | 2.16 | 0.38 | 2.80 | 0.50 | 15.03 | 218.19 | 0.19 |
F7-039 | 65.90 | 127.69 | 13.11 | 37.69 | 4.43 | 0.80 | 3.09 | 0.30 | 0.93 | 0.13 | 0.28 | 0.04 | 0.22 | 0.03 | 49.75 | 254.63 | 0.66 |
F7-040 | 77.62 | 142.28 | 14.29 | 40.26 | 5.12 | 0.86 | 3.59 | 0.34 | 1.19 | 0.20 | 0.54 | 0.07 | 0.44 | 0.06 | 43.48 | 286.87 | 0.61 |
样品 编号 | Y | Zr | Hf | Rb | Sr | Nb | Ba | Ta | Th | Li | Be | Sc | Co | Ni | Cu | Zn | Ga |
F7-017 | 42.04 | 133.31 | 4.06 | 97.98 | 217.41 | 11.14 | 267.83 | 0.83 | 7.69 | 31.08 | 2.04 | 22.65 | 20.35 | 8.79 | 6.76 | 104.14 | 20.06 |
F7-037 | 20.65 | 123.93 | 4.70 | 226.86 | 61.49 | 8.11 | 33.20 | 1.74 | 136.53 | 7.13 | 3.57 | 0.75 | 1.24 | 0.57 | 1.96 | 20.83 | 15.23 |
F7-039 | 3.67 | 115.17 | 3.78 | 138.84 | 261.11 | 4.13 | 1 248.52 | 0.19 | 18.82 | 3.48 | 0.96 | 1.67 | 2.22 | 1.33 | 5.58 | 10.45 | 16.48 |
F7-040 | 5.59 | 35.87 | 1.38 | 190.48 | 284.57 | 32.41 | 2 308.30 | 0.30 | 14.61 | 1.19 | 1.04 | 0.90 | 5.47 | 1.36 | 7.89 | 7.36 | 18.19 |
样品 编号 | Cs | Pb | U | Bi | V | Cr | Tl | ||||||||||
F7-017 | 4.17 | 12.43 | 1.19 | 0.09 | 165.20 | 17.30 | 0.63 | ||||||||||
F7-037 | 11.74 | 30.06 | 17.89 | 6.45 | 8.95 | 1.76 | 0.66 | ||||||||||
F7-039 | 1.44 | 17.10 | 1.12 | 1.06 | 15.63 | 4.16 | 0.62 | ||||||||||
F7-040 | 1.27 | 15.42 | 0.91 | 3.77 | 11.03 | 1.87 | 0.72 |
Fig.5 Discrimination diagrams of SiO2-TiO2 ((a), from reference [31]) and A/CNK versus A/NK ((b), from reference [32]) for wallrocks of the F7 vein (wallrock data of the S35 vein from authors’ unpubl. data)
Fig.6 Chondrite-normalized REE diagram (a) and primitive mantle-normalized multi-element diagram (b) for wallrocks in the Dahu Au-Mo deposit (Normalizing values from reference[34])
Fig.7 Granite discrimination plots of 10000Ga/Al vs.(K2O+Na2O) and K2O/MgO ((a)(b), from reference [7]), ternary Nb-Y-Ce and Nb-Y-3Ga ((c)(d), from reference [3])from wallrocks in the Dahu Au-Mo deposit (wallrock data of the S35 vein from authors’ unpubl. data)
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