Dating Ore Deposit Using Garnet U–Pb Geochronology: Example from the Xinqiao Cu–S–Fe–Au Deposit, Eastern China
Abstract
:1. Introduction
2. Geological Setting
2.1. Regional Geology
2.2. Ore Deposit Geology
3. Sample Descriptions
4. Analytical Methods
5. Results
5.1. Trace Element Geochemistry
5.2. U–Pb Dating
6. Discussion
6.1. Occurrence of Uranium in the Garnet
6.2. Timing of the Garnets and Mineralization
6.3. Origin of the Garnet
7. Conclusions
- (1)
- Garnets from the Xinqiao stratiform orebody can be divided into early garnet (Grt1) and late garnet (Grt2) generations. Grt1 and Grt2 yielded weighted average 207Pb-correction 206Pb/238U ages of 137.0 ± 7.8 Ma (MSWD = 4.9) and 129.6 ± 7.1 Ma (MSWD = 1.6), respectively, close to the zircon U–Pb age of the Jitou stock, indicating that they formed in the Early Cretaceous.
- (2)
- The Xinqiao garnet and stratiform mineralization may have formed from Early Cretaceous magmatic–hydrothermal fluids associated with the Jitou stock, and were generated by the Early Cretaceous tectono-thermal event in Eastern China.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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No. | Sample | Type | SiO2 (wt %) | Y | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | U |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | XQ37-1 | Grt1 | 38.38 | 110.56 | 1.07 | 6.34 | 2.02 | 15.60 | 7.12 | 1.98 | 9.62 | 1.71 | 11.21 | 2.68 | 7.55 | 1.05 | 8.16 | 1.13 | 2.83 |
2 | XQ37-1 | Grt1 | 38.58 | 78.84 | 1.92 | 7.18 | 2.40 | 17.52 | 5.67 | 1.55 | 7.27 | 1.22 | 7.84 | 1.82 | 5.21 | 0.76 | 5.62 | 0.85 | 3.84 |
3 | XQ37-1 | Grt1 | 37.56 | 73.37 | 0.49 | 2.41 | 2.77 | 18.46 | 2.01 | 0.69 | 4.09 | 0.89 | 6.67 | 1.65 | 5.04 | 0.67 | 5.82 | 0.76 | 3.42 |
4 | XQ37-1 | Grt1 | 39.11 | 80.31 | 1.33 | 8.28 | 2.73 | 18.97 | 5.48 | 1.57 | 7.21 | 1.17 | 8.36 | 1.78 | 5.57 | 0.77 | 6.32 | 0.90 | 2.92 |
5 | XQ37-1 | Grt1 | 37.80 | 71.85 | 0.50 | 2.76 | 2.88 | 16.38 | 2.39 | 0.69 | 4.77 | 0.87 | 6.55 | 1.60 | 5.04 | 0.74 | 5.53 | 0.71 | 3.51 |
6 | XQ37-1 | Grt1 | 38.59 | 69.72 | 0.55 | 2.47 | 2.90 | 17.17 | 2.16 | 0.74 | 4.00 | 0.79 | 6.17 | 1.46 | 4.71 | 0.71 | 5.13 | 0.75 | 3.59 |
7 | XQ37-1 | Grt1 | 36.81 | 74.62 | 0.58 | 2.62 | 2.85 | 20.28 | 2.52 | 0.71 | 4.52 | 0.97 | 6.68 | 1.72 | 5.76 | 0.75 | 6.06 | 0.75 | 3.64 |
8 | XQ37-1 | Grt1 | 37.86 | 68.43 | 0.52 | 2.44 | 2.66 | 17.34 | 2.10 | 0.63 | 4.16 | 0.82 | 6.53 | 1.54 | 4.70 | 0.78 | 5.80 | 0.71 | 4.23 |
9 | XQ37-1 | Grt1 | 36.86 | 72.40 | 0.98 | 3.26 | 3.38 | 20.67 | 1.74 | 0.65 | 3.93 | 0.90 | 6.70 | 1.61 | 4.80 | 0.71 | 5.53 | 0.78 | 4.57 |
10 | XQ37-1 | Grt1 | 37.95 | 68.89 | 0.54 | 2.43 | 2.76 | 17.89 | 1.77 | 0.58 | 3.95 | 0.80 | 5.98 | 1.53 | 4.79 | 0.67 | 5.48 | 0.69 | 4.20 |
11 | XQ37-1 | Grt1 | 38.97 | 50.15 | 1.50 | 10.32 | 3.68 | 28.73 | 8.64 | 2.00 | 8.05 | 1.03 | 5.83 | 1.16 | 3.19 | 0.44 | 3.01 | 0.38 | 5.35 |
12 | XQ37-1 | Grt1 | 38.63 | 57.99 | 2.66 | 10.05 | 3.29 | 19.31 | 5.82 | 1.56 | 6.84 | 0.91 | 6.64 | 1.46 | 4.12 | 0.51 | 3.83 | 0.52 | 5.23 |
13 | XQ37-1 | Grt1 | 35.91 | 70.27 | 0.47 | 2.32 | 2.79 | 22.34 | 1.96 | 0.72 | 4.17 | 0.89 | 6.55 | 1.61 | 5.08 | 0.78 | 6.11 | 0.75 | 3.91 |
14 | XQ37-1 | Grt1 | 38.77 | 72.28 | 0.68 | 3.08 | 2.91 | 22.09 | 2.49 | 0.77 | 4.49 | 1.04 | 6.73 | 1.64 | 4.93 | 0.80 | 5.13 | 0.74 | 3.63 |
15 | XQ37-1 | Grt1 | 37.98 | 38.07 | 2.52 | 13.61 | 3.58 | 21.32 | 5.39 | 1.13 | 5.06 | 0.64 | 4.24 | 0.95 | 2.49 | 0.34 | 2.37 | 0.36 | 4.43 |
16 | XQ37-1 | Grt1 | 38.07 | 70.82 | 0.83 | 4.93 | 3.41 | 22.92 | 2.58 | 0.88 | 4.51 | 0.86 | 6.42 | 1.59 | 4.82 | 0.71 | 5.69 | 0.75 | 5.31 |
17 | XQ37-1 | Grt1 | 37.78 | 44.06 | 2.25 | 15.28 | 4.31 | 28.16 | 7.06 | 1.33 | 7.13 | 0.93 | 5.46 | 1.13 | 2.91 | 0.34 | 2.75 | 0.41 | 6.85 |
18 | XQ37-1 | Grt1 | 38.49 | 96.25 | 1.96 | 15.41 | 4.88 | 30.23 | 8.42 | 2.65 | 9.08 | 1.52 | 9.74 | 2.32 | 6.56 | 0.97 | 6.68 | 1.03 | 7.65 |
19 | XQ37-1 | Grt1 | 38.37 | 104.11 | 1.91 | 11.04 | 3.03 | 20.75 | 7.23 | 1.89 | 9.42 | 1.51 | 10.40 | 2.31 | 7.09 | 1.02 | 7.61 | 0.93 | 5.49 |
20 | XQ37-1 | Grt1 | 37.96 | 282.27 | 1.48 | 10.00 | 3.22 | 25.82 | 14.89 | 4.37 | 23.38 | 4.29 | 30.50 | 7.32 | 21.04 | 3.23 | 22.85 | 3.17 | 6.26 |
21 | XQ37-1 | Grt1 | 39.60 | 39.04 | 2.63 | 15.71 | 5.87 | 30.30 | 3.92 | 1.26 | 3.84 | 0.62 | 4.00 | 0.87 | 2.51 | 0.37 | 2.76 | 0.40 | 13.93 |
22 | XQ37-1 | Grt1 | 39.91 | 63.47 | 2.14 | 14.47 | 4.21 | 27.06 | 6.04 | 1.72 | 6.26 | 0.86 | 5.79 | 1.57 | 4.11 | 0.61 | 3.76 | 0.63 | 10.08 |
23 | XQ37-1 | Grt1 | 37.75 | 62.74 | 0.82 | 4.91 | 3.37 | 21.32 | 2.49 | 0.80 | 4.00 | 0.75 | 5.78 | 1.39 | 4.33 | 0.62 | 4.91 | 0.67 | 5.20 |
24 | XQ37-1 | Grt1 | 38.09 | 57.05 | 1.28 | 5.40 | 3.46 | 19.99 | 3.16 | 0.92 | 3.95 | 0.71 | 5.46 | 1.28 | 3.74 | 0.53 | 4.26 | 0.61 | 5.22 |
25 | XQ39-1 | Grt1 | 39.38 | 68.77 | 1.56 | 5.98 | 3.37 | 27.90 | 2.53 | 0.83 | 4.05 | 0.80 | 6.24 | 1.50 | 4.84 | 0.75 | 5.20 | 0.71 | 6.88 |
26 | XQ39-1 | Grt1 | 36.99 | 97.96 | 2.16 | 11.98 | 3.84 | 23.41 | 6.30 | 1.87 | 9.19 | 1.57 | 10.49 | 2.36 | 6.67 | 0.97 | 6.96 | 0.95 | 5.52 |
27 | XQ39-1 | Grt1 | 39.09 | 66.43 | 2.53 | 15.14 | 4.39 | 25.09 | 6.42 | 1.68 | 7.21 | 1.08 | 7.13 | 1.58 | 4.57 | 0.63 | 4.66 | 0.70 | 5.56 |
28 | XQ39-1 | Grt1 | 38.61 | 141.16 | 1.21 | 7.63 | 2.92 | 20.85 | 8.35 | 2.41 | 12.03 | 1.92 | 14.81 | 3.41 | 10.88 | 1.58 | 12.17 | 1.62 | 4.91 |
29 | XQ39-1 | Grt1 | 39.36 | 125.33 | 1.68 | 6.10 | 2.30 | 18.17 | 7.46 | 1.96 | 12.36 | 1.91 | 13.42 | 3.09 | 8.39 | 1.16 | 9.25 | 1.28 | 2.57 |
30 | XQ39-1 | Grt1 | 38.98 | 94.80 | 1.22 | 8.37 | 2.90 | 19.64 | 5.99 | 1.68 | 7.67 | 1.42 | 9.62 | 2.10 | 6.48 | 0.96 | 7.07 | 0.97 | 3.56 |
31 | XQ39-1 | Grt1 | 38.66 | 58.77 | 1.23 | 9.04 | 2.84 | 19.99 | 5.50 | 1.43 | 6.30 | 1.03 | 6.38 | 1.36 | 4.00 | 0.54 | 4.04 | 0.58 | 3.34 |
32 | XQ39-1 | Grt1 | 37.88 | 296.84 | 1.59 | 10.55 | 3.30 | 27.47 | 14.89 | 4.73 | 25.61 | 4.51 | 32.37 | 8.04 | 22.67 | 3.29 | 23.49 | 3.33 | 6.85 |
33 | XQ39-1 | Grt1 | 39.91 | 127.47 | 0.92 | 4.02 | 1.69 | 13.67 | 6.56 | 2.30 | 9.23 | 1.86 | 13.81 | 3.04 | 8.31 | 1.31 | 9.25 | 1.18 | 1.69 |
34 | XQ39-1 | Grt1 | 38.88 | 230.21 | 1.39 | 8.91 | 2.94 | 25.47 | 10.11 | 3.24 | 15.73 | 3.44 | 24.17 | 6.14 | 17.65 | 2.71 | 19.48 | 2.53 | 4.69 |
35 | XQ39-1 | Grt1 | 39.36 | 121.33 | 0.65 | 4.53 | 1.79 | 13.33 | 6.52 | 2.38 | 11.37 | 1.91 | 12.49 | 2.80 | 8.24 | 1.14 | 8.34 | 1.21 | 1.60 |
36 | XQ39-1 | Grt1 | 38.03 | 73.35 | 1.33 | 10.37 | 3.53 | 20.58 | 6.52 | 1.59 | 6.59 | 1.13 | 7.33 | 1.64 | 4.98 | 0.70 | 5.26 | 0.72 | 4.89 |
37 | XQ39-1 | Grt1 | 39.12 | 63.74 | 1.63 | 9.54 | 2.94 | 19.32 | 5.47 | 1.64 | 5.81 | 0.94 | 6.45 | 1.45 | 4.20 | 0.62 | 4.45 | 0.61 | 5.89 |
38 | XQ37-1 | Grt2 | 35.59 | 3.28 | 12.52 | 77.87 | 13.09 | 34.21 | 2.85 | 4.09 | 0.93 | 0.14 | 0.46 | 0.09 | 0.16 | 0.03 | 0.23 | 0.03 | 11.20 |
39 | XQ37-1 | Grt2 | 35.28 | 17.93 | 9.99 | 68.33 | 11.90 | 34.02 | 2.66 | 4.25 | 2.00 | 0.30 | 2.04 | 0.40 | 1.28 | 0.16 | 1.22 | 0.13 | 10.91 |
40 | XQ37-1 | Grt2 | 36.37 | 5.40 | 9.75 | 69.80 | 9.17 | 23.25 | 2.13 | 2.15 | 1.08 | 0.13 | 0.67 | 0.09 | 0.24 | 0.03 | 0.19 | 0.04 | 10.15 |
41 | XQ37-1 | Grt2 | 35.90 | 13.96 | 4.90 | 30.51 | 3.95 | 10.57 | 1.96 | 1.18 | 2.36 | 0.32 | 1.73 | 0.32 | 0.89 | 0.11 | 0.81 | 0.10 | 3.58 |
42 | XQ37-1 | Grt2 | 36.76 | 11.97 | 5.85 | 38.31 | 5.52 | 16.36 | 2.38 | 1.68 | 2.35 | 0.29 | 1.60 | 0.27 | 0.67 | 0.11 | 0.61 | 0.10 | 4.46 |
43 | XQ37-1 | Grt2 | 36.32 | 18.00 | 5.02 | 33.60 | 4.68 | 14.41 | 3.64 | 1.45 | 3.56 | 0.46 | 2.42 | 0.45 | 0.96 | 0.13 | 0.91 | 0.11 | 4.91 |
44 | XQ37-1 | Grt2 | 36.41 | 10.72 | 7.36 | 44.06 | 7.09 | 26.42 | 2.55 | 3.05 | 2.45 | 0.25 | 1.53 | 0.26 | 0.53 | 0.08 | 0.86 | 0.07 | 7.51 |
45 | XQ37-1 | Grt2 | 35.36 | 11.19 | 6.36 | 47.82 | 7.28 | 21.77 | 2.48 | 2.69 | 2.60 | 0.29 | 1.36 | 0.29 | 0.71 | 0.07 | 0.70 | 0.07 | 7.15 |
46 | XQ37-1 | Grt2 | 35.65 | 11.75 | 14.09 | 65.80 | 8.82 | 23.06 | 2.33 | 2.50 | 2.04 | 0.22 | 1.45 | 0.26 | 0.75 | 0.08 | 0.63 | 0.08 | 10.37 |
47 | XQ37-1 | Grt2 | 36.37 | 11.42 | 7.32 | 45.10 | 6.03 | 16.50 | 1.88 | 1.63 | 2.35 | 0.26 | 1.59 | 0.25 | 0.71 | 0.08 | 0.69 | 0.08 | 6.59 |
48 | XQ37-1 | Grt2 | 35.23 | 16.90 | 5.29 | 55.04 | 8.61 | 21.59 | 1.72 | 2.49 | 2.49 | 0.36 | 2.37 | 0.40 | 1.04 | 0.10 | 1.14 | 0.13 | 6.73 |
49 | XQ37-1 | Grt2 | 35.89 | 4.28 | 11.21 | 70.60 | 10.63 | 28.63 | 1.76 | 2.66 | 1.27 | 0.14 | 0.58 | 0.10 | 0.25 | 0.03 | 0.19 | 0.03 | 9.40 |
50 | XQ37-1 | Grt2 | 34.92 | 18.19 | 7.22 | 59.64 | 9.46 | 27.36 | 3.00 | 3.09 | 2.55 | 0.43 | 2.24 | 0.48 | 1.26 | 0.15 | 1.12 | 0.13 | 8.26 |
51 | XQ37-1 | Grt2 | 36.72 | 4.99 | 12.60 | 77.15 | 12.85 | 34.11 | 2.70 | 4.03 | 1.41 | 0.18 | 0.41 | 0.11 | 0.33 | 0.04 | 0.15 | 0.04 | 12.90 |
52 | XQ39-1 | Grt2 | 38.04 | 4.71 | 10.46 | 66.53 | 9.86 | 27.51 | 1.77 | 2.37 | 1.51 | 0.14 | 0.65 | 0.12 | 0.31 | 0.04 | 0.28 | 0.04 | 9.11 |
53 | XQ39-1 | Grt2 | 35.78 | 4.10 | 10.00 | 64.68 | 9.37 | 25.78 | 1.98 | 1.90 | 1.97 | 0.17 | 0.50 | 0.13 | 0.18 | 0.02 | 0.18 | 0.02 | 9.69 |
54 | XQ39-1 | Grt2 | 34.63 | 17.68 | 4.94 | 46.82 | 7.39 | 24.14 | 3.27 | 2.60 | 2.73 | 0.33 | 1.85 | 0.35 | 0.92 | 0.15 | 0.93 | 0.13 | 5.80 |
55 | XQ39-1 | Grt2 | 34.95 | 16.17 | 8.23 | 67.02 | 9.48 | 23.31 | 2.84 | 2.52 | 2.53 | 0.29 | 1.74 | 0.38 | 0.85 | 0.10 | 0.86 | 0.13 | 8.33 |
56 | XQ39-1 | Grt2 | 36.14 | 2.93 | 10.73 | 65.37 | 9.61 | 22.68 | 1.03 | 1.96 | 0.67 | 0.10 | 0.36 | 0.06 | 0.17 | 0.03 | 0.12 | 0.02 | 8.86 |
57 | XQ39-1 | Grt2 | 36.16 | 4.93 | 16.90 | 94.77 | 12.75 | 30.36 | 1.89 | 2.30 | 1.43 | 0.13 | 0.64 | 0.11 | 0.26 | 0.04 | 0.24 | 0.03 | 15.43 |
58 | XQ39-1 | Grt2 | 35.29 | 18.16 | 5.95 | 46.87 | 7.41 | 21.02 | 2.67 | 2.28 | 3.32 | 0.42 | 2.00 | 0.43 | 1.11 | 0.15 | 1.08 | 0.14 | 5.97 |
59 | XQ39-1 | Grt2 | 35.46 | 3.66 | 11.81 | 73.06 | 10.57 | 26.64 | 1.78 | 2.24 | 0.92 | 0.10 | 0.45 | 0.07 | 0.21 | 0.03 | 0.22 | 0.03 | 10.54 |
60 | XQ39-1 | Grt2 | 35.70 | 12.29 | 5.67 | 36.16 | 5.25 | 16.52 | 2.84 | 1.33 | 2.67 | 0.36 | 1.45 | 0.26 | 0.58 | 0.07 | 0.56 | 0.07 | 5.86 |
61 | XQ39-1 | Grt2 | 36.41 | 3.83 | 11.91 | 73.07 | 11.19 | 33.07 | 1.65 | 2.89 | 0.92 | 0.10 | 0.52 | 0.08 | 0.16 | 0.03 | 0.17 | 0.03 | 10.19 |
62 | XQ39-1 | Grt2 | 37.85 | 7.51 | 12.67 | 75.12 | 11.62 | 33.95 | 2.16 | 3.25 | 2.10 | 0.20 | 0.88 | 0.17 | 0.40 | 0.06 | 0.41 | 0.06 | 11.84 |
63 | XQ39-1 | Grt2 | 36.15 | 21.87 | 4.59 | 30.36 | 5.07 | 14.85 | 2.50 | 2.01 | 3.01 | 0.45 | 2.68 | 0.56 | 1.32 | 0.20 | 1.26 | 0.12 | 5.00 |
64 | XQ39-1 | Grt2 | 35.17 | 6.32 | 11.04 | 68.67 | 9.86 | 27.32 | 1.81 | 2.26 | 1.24 | 0.13 | 0.77 | 0.12 | 0.42 | 0.05 | 0.32 | 0.06 | 9.18 |
65 | XQ39-1 | Grt2 | 36.32 | 3.07 | 10.99 | 70.11 | 9.82 | 26.77 | 1.57 | 2.23 | 0.99 | 0.10 | 0.51 | 0.07 | 0.19 | 0.02 | 0.18 | 0.02 | 9.52 |
66 | XQ39-1 | Grt2 | 35.75 | 4.37 | 11.13 | 71.26 | 10.20 | 27.43 | 1.58 | 2.32 | 1.02 | 0.12 | 0.63 | 0.09 | 0.23 | 0.03 | 0.22 | 0.03 | 10.28 |
67 | XQ39-1 | Grt2 | 35.64 | 7.95 | 10.62 | 74.38 | 10.29 | 26.22 | 2.83 | 2.49 | 2.18 | 0.19 | 1.26 | 0.22 | 0.52 | 0.08 | 0.57 | 0.09 | 10.97 |
68 | XQ39-1 | Grt2 | 35.50 | 4.51 | 11.60 | 71.88 | 10.24 | 28.77 | 1.83 | 2.28 | 1.05 | 0.09 | 0.42 | 0.10 | 0.29 | 0.04 | 0.24 | 0.04 | 11.39 |
69 | XQ39-1 | Grt2 | 36.99 | 4.15 | 12.65 | 79.89 | 11.47 | 30.15 | 1.82 | 2.48 | 1.75 | 0.13 | 0.62 | 0.10 | 0.23 | 0.03 | 0.24 | 0.03 | 11.94 |
70 | XQ39-1 | Grt2 | 35.84 | 9.58 | 9.54 | 67.59 | 9.95 | 25.59 | 2.44 | 2.34 | 2.03 | 0.20 | 1.07 | 0.20 | 0.55 | 0.06 | 0.47 | 0.06 | 9.69 |
71 | XQ39-1 | Grt2 | 35.51 | 4.33 | 12.82 | 80.63 | 11.09 | 28.26 | 1.86 | 2.21 | 1.22 | 0.12 | 0.56 | 0.10 | 0.22 | 0.03 | 0.25 | 0.03 | 12.68 |
72 | XQ39-1 | Grt2 | 35.77 | 14.54 | 9.86 | 74.29 | 10.27 | 25.05 | 2.74 | 2.65 | 2.39 | 0.32 | 1.81 | 0.36 | 0.88 | 0.11 | 0.86 | 0.13 | 10.45 |
73 | XQ39-1 | Grt2 | 36.02 | 3.18 | 13.09 | 82.29 | 11.68 | 29.66 | 1.56 | 2.20 | 0.92 | 0.08 | 0.42 | 0.06 | 0.17 | 0.03 | 0.19 | 0.03 | 13.18 |
74 | XQ39-1 | Grt2 | 35.07 | 17.85 | 5.19 | 49.49 | 8.82 | 26.68 | 3.17 | 3.13 | 2.17 | 0.36 | 1.92 | 0.41 | 0.80 | 0.11 | 1.17 | 0.13 | 6.13 |
75 | XQ39-1 | Grt2 | 35.68 | 3.06 | 12.12 | 73.29 | 10.44 | 27.00 | 1.69 | 2.15 | 0.95 | 0.08 | 0.59 | 0.06 | 0.21 | 0.03 | 0.14 | 0.02 | 10.91 |
76 | XQ39-1 | Grt2 | 35.68 | 2.97 | 15.86 | 85.42 | 11.06 | 28.76 | 2.06 | 1.72 | 0.96 | 0.10 | 0.49 | 0.07 | 0.15 | 0.02 | 0.21 | 0.02 | 14.27 |
77 | XQ39-1 | Grt2 | 36.11 | 4.26 | 12.19 | 74.08 | 10.32 | 29.23 | 1.56 | 2.27 | 0.79 | 0.08 | 0.32 | 0.08 | 0.19 | 0.05 | 0.29 | 0.04 | 12.33 |
78 | XQ39-1 | Grt2 | 35.52 | 20.17 | 4.85 | 45.31 | 7.55 | 22.32 | 3.67 | 2.68 | 3.17 | 0.44 | 2.57 | 0.45 | 1.20 | 0.13 | 1.22 | 0.17 | 5.71 |
79 | XQ39-1 | Grt2 | 35.51 | 13.70 | 11.57 | 62.85 | 9.25 | 27.66 | 2.32 | 3.06 | 1.93 | 0.29 | 1.59 | 0.31 | 0.85 | 0.11 | 0.89 | 0.10 | 8.66 |
80 | XQ39-1 | Grt2 | 35.44 | 2.57 | 18.31 | 100.04 | 13.21 | 33.45 | 1.68 | 2.26 | 0.83 | 0.08 | 0.32 | 0.05 | 0.14 | 0.02 | 0.15 | 0.02 | 17.34 |
81 | XQ39-1 | Grt2 | 35.63 | 2.99 | 13.44 | 80.82 | 12.29 | 35.29 | 1.77 | 3.18 | 0.90 | 0.10 | 0.38 | 0.06 | 0.17 | 0.02 | 0.36 | 0.02 | 11.61 |
82 | XQ39-1 | Grt2 | 35.66 | 16.03 | 5.80 | 53.15 | 7.84 | 22.85 | 2.75 | 2.57 | 2.79 | 0.38 | 1.91 | 0.35 | 0.99 | 0.12 | 0.59 | 0.13 | 6.35 |
83 | XQ39-1 | Grt2 | 36.25 | 7.71 | 14.64 | 72.85 | 10.17 | 25.13 | 2.21 | 2.83 | 1.77 | 0.19 | 0.99 | 0.17 | 0.39 | 0.06 | 0.44 | 0.06 | 11.15 |
84 | XQ39-1 | Grt2 | 35.49 | 2.40 | 20.34 | 108.44 | 14.07 | 33.63 | 1.74 | 2.42 | 0.79 | 0.06 | 0.30 | 0.05 | 0.15 | 0.02 | 0.16 | 0.02 | 17.81 |
85 | XQ39-1 | Grt2 | 35.58 | 3.85 | 10.77 | 67.76 | 10.23 | 30.23 | 1.93 | 2.61 | 1.10 | 0.12 | 0.49 | 0.08 | 0.21 | 0.02 | 0.17 | 0.02 | 8.91 |
86 | XQ39-1 | Grt2 | 34.96 | 17.72 | 7.12 | 60.99 | 9.98 | 26.52 | 2.57 | 3.35 | 2.94 | 0.37 | 2.34 | 0.35 | 1.17 | 0.11 | 0.78 | 0.08 | 8.24 |
No. | Type | Pb (ppm) | 204Pb (ppm) | Th (ppm) | U (ppm) | Isotope Ratios | 207Pb-Based Age (Ma) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
207Pb/206Pb | 1sigma | 207Pb/235U | 1sigma | 206Pb/238U | 1sigma | rho | 206Pb/238U | 1sigma | ||||||
1 | Grt1 | 0.493 | 0.001 | 0.524 | 2.832 | 1.6060 | 0.3771 | 15.7253 | 1.5263 | 0.1386 | 0.0108 | 0.8025 | 162.6 | 11.9 |
2 | Grt1 | 1.894 | 10.968 | 0.375 | 3.839 | 1.2654 | 0.1586 | 15.5996 | 1.1917 | 0.1360 | 0.0105 | 0.8432 | 151.3 | 11.0 |
3 | Grt1 | 1.846 | 6.736 | 0.822 | 3.417 | 1.1679 | 0.1203 | 11.8480 | 0.6883 | 0.1071 | 0.0057 | 0.9090 | 140.4 | 7.1 |
4 | Grt1 | 0.338 | 6.151 | 0.214 | 2.920 | 0.6358 | 0.1634 | 11.0720 | 1.1073 | 0.1051 | 0.0122 | 0.8365 | 164.6 | 18.2 |
5 | Grt1 | 1.807 | 6.968 | 0.915 | 3.511 | 1.2147 | 0.1674 | 10.5318 | 0.6332 | 0.1035 | 0.0051 | 0.8229 | 180.4 | 8.5 |
6 | Grt1 | 1.740 | 10.284 | 0.931 | 3.589 | 1.0366 | 0.1273 | 10.2757 | 0.8752 | 0.0945 | 0.0063 | 0.7845 | 132.8 | 8.5 |
7 | Grt1 | 1.590 | 1.889 | 1.002 | 3.642 | 0.8259 | 0.0951 | 9.5730 | 1.1702 | 0.0907 | 0.0084 | 0.7536 | 141.6 | 12.5 |
8 | Grt1 | 2.023 | 33.409 | 1.040 | 4.230 | 1.2031 | 0.3023 | 8.3650 | 0.9025 | 0.0784 | 0.0083 | 0.9809 | 118.0 | 12.0 |
9 | Grt1 | 1.810 | 13.725 | 1.581 | 4.574 | 0.9962 | 0.1286 | 7.7180 | 0.6235 | 0.0770 | 0.0056 | 0.9047 | 140.2 | 9.9 |
10 | Grt1 | 1.305 | 10.186 | 1.037 | 4.203 | 1.0495 | 0.1223 | 6.9929 | 0.4145 | 0.0734 | 0.0036 | 0.8167 | 151.2 | 7.1 |
11 | Grt1 | 0.540 | 1.140 | 0.390 | 5.348 | 1.1069 | 0.2099 | 6.7314 | 0.5120 | 0.0714 | 0.0054 | 0.8103 | 150.5 | 11.1 |
12 | Grt1 | 0.878 | 11.752 | 0.284 | 5.233 | 0.9875 | 0.1405 | 7.2062 | 0.6614 | 0.0689 | 0.0083 | 0.8246 | 111.1 | 12.9 |
13 | Grt1 | 0.988 | 4.978 | 1.032 | 3.907 | 1.1379 | 0.2141 | 6.1846 | 0.5741 | 0.0687 | 0.0067 | 0.8580 | 159.2 | 15.0 |
14 | Grt1 | 1.125 | 12.585 | 0.843 | 3.625 | 1.2107 | 0.2663 | 6.2044 | 0.7496 | 0.0654 | 0.0056 | 0.7035 | 136.2 | 11.2 |
15 | Grt1 | 0.178 | 0.001 | 1.439 | 4.431 | 0.6198 | 0.1430 | 6.1056 | 0.4682 | 0.0631 | 0.0047 | 0.9656 | 125.7 | 9.0 |
16 | Grt1 | 1.573 | 17.494 | 1.641 | 5.311 | 0.9616 | 0.0929 | 5.8652 | 0.4075 | 0.0615 | 0.0029 | 0.6804 | 126.6 | 5.8 |
17 | Grt1 | 0.737 | 4.164 | 1.881 | 6.851 | 0.7704 | 0.1271 | 5.7500 | 1.1872 | 0.0613 | 0.0065 | 0.5160 | 131.1 | 13.6 |
18 | Grt1 | 1.096 | 8.490 | 0.488 | 7.647 | 0.6550 | 0.0733 | 5.1011 | 0.5568 | 0.0603 | 0.0048 | 0.7296 | 155.4 | 12.0 |
19 | Grt1 | 0.610 | 9.061 | 0.572 | 5.485 | 1.1300 | 0.2175 | 5.6147 | 0.4517 | 0.0594 | 0.0038 | 0.7962 | 124.7 | 7.8 |
20 | Grt1 | 0.235 | 0.001 | 6.925 | 6.259 | 0.9177 | 0.3245 | 5.3206 | 0.6277 | 0.0554 | 0.0033 | 0.5058 | 112.7 | 6.5 |
21 | Grt1 | 2.093 | 15.639 | 0.939 | 13.928 | 0.5873 | 0.0550 | 2.7959 | 0.1549 | 0.0449 | 0.0020 | 0.7896 | 164.3 | 7.0 |
22 | Grt1 | 1.551 | 18.505 | 0.747 | 10.075 | 0.6754 | 0.1203 | 3.1180 | 0.4200 | 0.0429 | 0.0041 | 0.7129 | 135.5 | 12.7 |
23 | Grt1 | 0.603 | 0.001 | 1.095 | 5.204 | 0.8704 | 0.1063 | 3.6740 | 0.2442 | 0.0429 | 0.0022 | 0.7758 | 108.6 | 5.5 |
24 | Grt1 | 0.404 | 6.946 | 0.764 | 5.224 | 0.7346 | 0.1142 | 2.6421 | 0.2346 | 0.0412 | 0.0027 | 0.7252 | 147.4 | 9.3 |
25 | Grt1 | 1.965 | 16.677 | 1.050 | 6.878 | 0.5219 | 0.0613 | 2.0284 | 0.1384 | 0.0357 | 0.0013 | 0.5246 | 140.6 | 4.9 |
38 | Grt2 | 0.119 | 2.034 | 0.059 | 11.197 | 0.7552 | 0.1453 | 14.1736 | 1.5552 | 0.1255 | 0.0098 | 0.7113 | 112.9 | 10.7 |
39 | Grt2 | 0.068 | 1.673 | 0.037 | 10.906 | 1.4342 | 0.5034 | 11.8783 | 2.2336 | 0.0989 | 0.0103 | 0.5564 | 115.2 | 7.1 |
40 | Grt2 | 0.085 | 0.001 | 0.191 | 10.154 | 0.9470 | 0.0001 | 7.0769 | 0.6785 | 0.0754 | 0.0059 | 0.8221 | 117.9 | 7.9 |
41 | Grt2 | 0.163 | 5.492 | 0.470 | 3.583 | 0.3452 | 0.0627 | 6.7435 | 1.1027 | 0.0658 | 0.0064 | 0.5968 | 124.6 | 8.5 |
42 | Grt2 | 0.156 | 1.030 | 0.035 | 4.458 | 0.8896 | 0.2493 | 5.0365 | 0.4441 | 0.0537 | 0.0034 | 0.7177 | 130.1 | 7.8 |
43 | Grt2 | 0.232 | 4.699 | 0.096 | 4.914 | 0.3830 | 0.0778 | 3.9199 | 0.5038 | 0.0460 | 0.0032 | 0.5339 | 131.7 | 12.9 |
44 | Grt2 | 0.863 | 20.123 | 1.493 | 7.510 | 0.6869 | 0.1704 | 3.1965 | 0.7070 | 0.0429 | 0.0084 | 0.8868 | 132.5 | 25.4 |
45 | Grt2 | 0.386 | 0.001 | 0.132 | 7.145 | 0.6542 | 0.0769 | 3.0401 | 0.2172 | 0.0422 | 0.0026 | 0.8565 | 133.6 | 7.9 |
46 | Grt2 | 0.712 | 4.035 | 1.471 | 10.371 | 0.6087 | 0.1012 | 2.9120 | 0.4311 | 0.0421 | 0.0058 | 0.9335 | 133.7 | 8.5 |
47 | Grt2 | 0.210 | 1.711 | 0.097 | 6.588 | 0.5874 | 0.1442 | 2.8859 | 0.3456 | 0.0403 | 0.0025 | 0.5125 | 135.0 | 8.1 |
48 | Grt2 | 0.207 | 0.435 | 0.240 | 6.725 | 0.8929 | 0.1710 | 2.9508 | 0.3487 | 0.0400 | 0.0028 | 0.5894 | 137.5 | 12.8 |
49 | Grt2 | 0.218 | 0.001 | 1.212 | 9.396 | 0.6567 | 0.1232 | 1.7524 | 0.1939 | 0.0326 | 0.0020 | 0.5411 | 140.9 | 19.1 |
50 | Grt2 | 0.188 | 0.001 | 1.100 | 8.255 | 0.6584 | 0.1788 | 1.5127 | 0.2153 | 0.0315 | 0.0030 | 0.6664 | 151.2 | 11.1 |
51 | Grt2 | 0.255 | 0.001 | 3.766 | 12.896 | 0.3070 | 0.0832 | 1.3361 | 0.2612 | 0.0293 | 0.0029 | 0.5083 | 160.9 | 12.2 |
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Zhang, Y.; Shao, Y.; Zhang, R.; Li, D.; Liu, Z.; Chen, H. Dating Ore Deposit Using Garnet U–Pb Geochronology: Example from the Xinqiao Cu–S–Fe–Au Deposit, Eastern China. Minerals 2018, 8, 31. https://doi.org/10.3390/min8010031
Zhang Y, Shao Y, Zhang R, Li D, Liu Z, Chen H. Dating Ore Deposit Using Garnet U–Pb Geochronology: Example from the Xinqiao Cu–S–Fe–Au Deposit, Eastern China. Minerals. 2018; 8(1):31. https://doi.org/10.3390/min8010031
Chicago/Turabian StyleZhang, Yu, Yongjun Shao, Rongqing Zhang, Dengfeng Li, Zhongfa Liu, and Huayong Chen. 2018. "Dating Ore Deposit Using Garnet U–Pb Geochronology: Example from the Xinqiao Cu–S–Fe–Au Deposit, Eastern China" Minerals 8, no. 1: 31. https://doi.org/10.3390/min8010031