Metallogenic mechanism of the Mangyahedong gold deposit in the Qimantage area of Qinghai Province: Constraints from hydrothermal apatite U−Pb dating and trace elements of pyrite
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摘要:
研究目的 茫崖河东金矿床位于东昆仑祁漫塔格地区中部，是近年祁漫塔格地区首个发现的具有找矿潜力的造山型金矿。矿体产于祁漫塔格群火山岩组中，受NW向构造破碎带控制。但矿床成因研究不足，制约了进一步找矿。
研究方法 通过系统的镜下鉴定及TIMA矿物定量分析，针对不同阶段的黄铁矿开展了LA−ICP−MS微量元素分析，对与主成矿期黄铁矿密切伴生的热液磷灰石，开展了LA−ICP−MS U−Pb定年，并探讨了矿床的成矿机制。
研究结果 ①成矿阶段从早到晚包括绢英岩化阶段（Ⅰ）、碳酸盐-绿泥石-硫化物-自然金阶段（Ⅱ）及成矿晚期方解石-黄铁矿脉阶段（Ⅲ）。电子探针成分及BSE图像分析显示，除自然金形式产出外，Au含量在成矿早阶段富As的黄铁矿核部相对较高（0.02%~0.06%, n=8），而黄铁矿边部几乎不含Au，成矿阶段黄铁矿具有贫As核部，富As、Au、Co的中边部；②金矿石中热液磷灰石LA−ICP−MS U−Pb定年结果为406±13 Ma（207Pb校正后的下交点年龄）。
结论 茫崖河东金矿属于造山型金矿，金矿成矿与区域变质-变形作用有关，成矿物质来源于祁漫塔格群火山岩组。
Abstract:Objective The Mangyahedong gold deposit, located in the central Qimantage area of the East Kunlun orogen, is the first discovered orogenic gold deposit with significant exploration potential in the Qimantage region in recent years. The ore bodies are hosted in the volcanic rock series of the Qimantage Group and controlled by NW−trending tectonic fracture zones. However, insufficient research on the genesis of the deposit has hindered further exploration.
Methods This study conducted systematic microscopic identification, TIMA mineral quantitative analysis, and LA−ICP−MS trace element analysis of pyrite from different mineralization stages. LA−ICP−MS U−Pb dating was performed on hydrothermal apatite associated with main−stage pyrite to constrain the metallogenic timing and discuss the ore−forming mechanisms.
Results ① Three mineralization stages were identified: sericitization (Stage I), carbonate−chlorite−sulfide−native gold (Stage II), and late−stage calcite−pyrite vein formation (Stage III). Electron microprobe analysis and BSE imaging revealed that, in addition to native gold, early−stage As−rich pyrite cores contain relatively higher Au concentrations (0.02%–0.06%, n=8), while pyrite rims are nearly Au−free. Main−stage pyrite exhibits As−poor cores and As−, Au−, Co−enriched intermediate rims. ② LA−ICP−MS U−Pb dating of hydrothermal apatite from gold ore yielded a lower intercept age of 406 ± 13 Ma (corrected using 207Pb).
Conclusions The Mangyahedong gold deposit is classified as an orogenic gold deposit, with mineralization linked to regional metamorphism−deformation processes. The ore−forming materials were derived from the volcanic rock series of the Qimantage Group.
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Key words:
- LA−ICP−MS /
- U−Pb dating of hydrothermal apatite /
- pyrite /
- trace elements /
- Mangyahedong gold deposit /
- Qimantage
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图 8 不同成因类型黄铁矿Sb/Bi−As/Ag二元判别图（据Augustin et al., 2018修改）
Figure 8.
图 9 茫崖河东金矿石中磷灰石稀土元素球粒陨石标准配分图（a，标准化值据McDonough and Sun, 1995）和热液成因判别图解（b，底图据O’Sullivan et al., 2020）
Figure 9.
表 1 茫崖河东金矿石中黄铁矿激光主量和微量元素分析结果
Table 1. LA−ICP−MS analysis results of major trace elements of pyrite in Mangyahedong gold deposit
元素 23MS
2-2
(1)-0123MS
2-2
(1)-0223MS
2-2
(1)-0323MS
2-2
(1)-0423MS
2-2
(1)-0523MS
2-2
(1)-0623MS
2-2
(2)-0723MS
2-2
(2)-0823MS
2-2
(2)-0923MS
2-2
(3)-1023MS
2-2
(3)-1123MS
2-2
(3)-1223MS
2-3
(2)-1323MS
2-3
(2)-1423MS
2-3
(2)-1523MS
2-3
(2)-1623MS
2-3
(2)-1723MS
2-3
(3)-1823MS
2-3
(3)-1923MS
2-3
(3)-2023MS
2-3
(3)-21Na 43.37 20.53 33.13 11.72 30.48 11.12 22.96 28.39 13.12 7.72 14.87 3.12 13.00 6.87 7.44 5.52 8.25 28.72 17.52 35.13 17.02 Mg 191.68 435.09 234.02 23.89 642.91 169.07 29.39 57.71 425.61 35.39 813.64 8.14 1.06 1.20 0.37 0.85 8.40 12.56 12.55 1284.7 55.97 Al 5671.21 1593.49 70.70 4.14 2081.95 243.50 355.04 2418.08 630.90 31.33 710.99 19.08 1.43 35.28 0.42 0.13 160.64 522.09 249.59 4441.7 1151.5 Si 7454.91 2509.99 449.75 310.11 3393.43 584.31 1207.38 3073.16 939.24 325.99 1668.0 273.34 197.31 248.49 186.61 272.12 398.33 917.03 567.00 6821.1 2532.9 P 16.51 16.22 11.04 20.05 8.21 15.75 13.56 8.21 2.75 4.64 7.90 3.20 5.55 2.50 7.69 0.00 4.04 6.62 15.63 16.45 12.35 K 1367.83 310.56 12.31 3.98 475.19 97.39 87.71 595.79 17.88 0.22 256.10 3.40 0.00 8.09 0.93 0.00 57.10 136.11 73.27 987.75 324.76 Ca 26.47 34.13 18853.6 1590.3 47.65 539.35 110.41 10.68 17.06 36.33 0.00 26.22 226.80 32.40 264.92 27.71 27.41 5.32 60.05 97.70 10.57 Sc 0.36 1.05 1.64 0.20 2.77 2.04 0.30 0.30 0.47 0.10 0.49 0.07 0.00 0.25 0.13 0.04 0.17 0.12 0.18 1.47 0.67 Ti 140.51 814.04 6.52 4.25 757.39 18.69 2415.02 195.31 5.45 5.26 29.74 8.90 4.06 784.97 5.68 5.71 221.91 146.44 479.24 179.50 560.16 V 26.63 12.92 0.41 0.06 27.60 2.70 11.70 9.63 3.85 0.18 5.39 0.10 0.04 7.16 0.00 0.02 2.77 3.74 5.31 19.90 13.80 Cr 6.44 30.14 2.17 6.65 76.72 6.66 6.63 4.61 11.44 2.27 2.10 2.57 4.35 18.88 2.41 0.36 9.04 6.82 6.43 98.60 14.08 Mn 0.98 4.04 175.79 15.57 5.57 16.22 0.54 1.30 4.62 0.63 4.51 0.39 2.51 0.28 2.52 0.82 0.60 0.61 2.72 12.28 1.04 FeS2 93.85 96.28 95.98 99.01 96.09 99.35 96.09 95.02 98.79 99.67 98.71 99.37 99.12 97.93 99.50 99.27 97.90 97.95 99.03 94.87 97.38 Co 5.88 28.62 16.88 41.35 21.04 0.41 30.78 20.60 338.05 10.55 63.50 11.97 0.29 12.96 1.18 0.34 33.35 14.20 104.01 57.47 11.06 Ni 74.25 104.46 35.87 290.12 100.19 41.38 106.52 140.79 522.49 56.04 278.36 31.30 0.55 41.92 285.93 38.35 74.22 98.66 1186.93 165.41 81.38 Cu 15.64 19.69 59.98 79.16 21.09 6.10 100.90 28.11 4.56 1.94 35.79 3.75 0.83 14.36 1.35 0.90 9.05 17.09 685.21 22.02 22.67 Zn 18.49 2.72 11.02 2.50 3.04 45.22 7.97 2.75 3.90 1.45 7.19 5.86 1.87 1.49 1.61 1.65 18.80 9.64 10.63 5.03 2.80 Ga 1.89 0.44 0.04 0.01 0.65 0.06 0.16 0.73 0.21 0.00 0.33 0.02 0.01 0.06 0.01 0.04 0.05 0.19 0.12 1.30 0.33 Ge 4.49 4.50 3.58 4.73 4.03 4.50 3.85 4.23 4.71 4.73 4.60 3.75 4.59 3.55 3.86 4.37 3.75 4.14 4.18 4.61 4.58 As 10939.2 12478.8 1980.8 3079.0 10563.6 1058.6 16734.1 18886.8 2869.1 1103.6 1393.9 3096.8 4649.83 10729.91 1973.59 3764.19 11106.76 9144.19 1372.48 6421.25 7493.95 Se 5.71 0.00 4.89 43.49 13.18 30.72 2.64 9.84 0.00 30.84 66.73 18.17 4.38 0.00 32.87 0.00 22.47 52.70 134.57 62.26 0.00 Rb 4.75 1.16 0.06 0.02 1.60 0.66 0.28 1.71 0.04 0.05 1.17 0.05 0.00 0.01 0.00 0.00 0.14 0.41 0.20 2.88 1.07 Sr 0.19 0.20 21.86 2.25 0.45 0.90 0.36 0.09 0.38 0.06 0.03 0.03 0.07 0.20 0.05 0.05 0.16 0.09 0.15 0.36 0.61 Y 0.11 0.83 2.06 0.09 1.67 0.79 0.76 0.28 0.00 0.00 0.01 0.00 0.03 0.66 0.03 0.02 0.27 0.17 0.35 0.35 0.76 Zr 4.69 17.81 0.13 0.00 4.42 0.57 18.58 3.77 0.07 0.01 0.06 11.27 0.18 3.96 3.43 0.04 3.16 1.43 2.96 1.96 3.50 Nb 0.06 0.39 0.00 0.00 0.10 0.00 0.92 0.08 0.00 0.00 0.00 0.00 0.00 0.07 0.00 0.00 0.04 0.02 0.22 0.04 0.31 Ag 0.11 0.06 0.06 0.12 0.12 0.10 0.15 0.05 0.02 0.04 0.09 0.10 0.00 0.08 0.20 0.00 0.08 0.02 0.75 0.12 0.16 In 0.01 0.00 0.18 0.02 0.03 0.04 0.01 0.02 0.00 0.01 0.08 0.00 0.04 0.06 0.00 0.01 0.01 0.00 0.09 0.01 0.01 Sn 0.10 0.09 0.00 0.01 0.09 0.26 0.07 0.35 0.06 0.00 0.24 0.04 0.01 0.03 0.11 0.00 0.01 0.00 0.09 0.10 0.03 Sb 72.96 8.15 10.84 3.12 71.92 31.41 26.99 35.44 1.99 2.20 5.17 4.96 0.12 43.71 3.65 3.47 13.43 22.59 7.82 65.17 63.47 Ba 4.57 1.10 0.42 0.00 3.31 0.36 1.33 3.02 0.08 0.09 0.26 0.00 0.01 0.23 0.01 0.00 0.21 0.76 0.47 5.30 2.31 La 0.02 0.17 0.14 0.01 0.50 0.40 0.04 0.02 0.01 0.00 0.00 0.00 0.01 0.13 0.00 0.00 0.04 0.02 0.07 0.06 0.14 Ce 0.07 0.36 0.31 0.03 0.97 1.22 0.16 0.06 0.00 0.01 0.00 0.00 0.05 0.27 0.04 0.01 0.09 0.06 0.25 0.17 0.40 Pr 0.01 0.04 0.07 0.00 0.14 0.22 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.02 0.01 0.03 0.02 0.06 Nd 0.01 0.21 0.39 0.03 0.52 1.20 0.11 0.05 0.02 0.02 0.02 0.00 0.05 0.20 0.01 0.01 0.09 0.08 0.12 0.16 0.25 Sm 0.01 0.07 0.15 0.04 0.34 0.29 0.07 0.06 0.01 0.01 0.01 0.00 0.00 0.02 0.01 0.01 0.02 0.03 0.02 0.03 0.11 Eu 0.01 0.04 0.05 0.01 0.02 0.05 0.01 0.01 0.00 0.01 0.03 0.01 0.01 0.04 0.00 0.00 0.02 0.00 0.03 0.00 0.03 Gd 0.01 0.06 0.21 0.00 0.33 0.19 0.06 0.05 0.03 0.00 0.00 0.00 0.04 0.08 0.00 0.00 0.03 0.01 0.03 0.08 0.12 Tb 0.00 0.03 0.04 0.00 0.04 0.04 0.01 0.00 0.01 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.01 0.01 0.01 Dy 0.02 0.08 0.51 0.03 0.33 0.20 0.11 0.05 0.00 0.00 0.02 0.00 0.01 0.13 0.00 0.01 0.09 0.01 0.15 0.12 0.34 Ho 0.01 0.04 0.08 0.00 0.36 0.03 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.00 0.01 0.00 0.09 0.03 0.03 Er 0.03 0.20 0.23 0.00 0.24 0.08 0.11 0.04 0.00 0.00 0.02 0.00 0.00 0.08 0.00 0.00 0.05 0.04 0.10 0.04 0.08 Tm 0.00 0.02 0.05 0.01 0.03 0.01 0.02 0.03 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.00 0.01 0.00 0.03 0.00 0.03 Yb 0.03 0.27 0.29 0.00 0.30 0.07 0.12 0.09 0.02 0.00 0.00 0.00 0.00 0.10 0.00 0.01 0.08 0.03 0.11 0.07 0.09 Lu 0.01 0.08 0.05 0.00 0.03 0.02 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.01 0.01 0.00 0.01 0.01 0.02 Hf 0.25 0.44 0.00 0.00 0.25 0.01 0.50 0.17 0.00 0.00 0.01 0.00 0.01 0.44 0.00 0.10 0.11 0.05 0.09 0.31 0.13 Au 0.49 60.00 1.59 1.74 19.65 0.26 48.03 27.92 1.51 0.08 0.30 0.71 0.68 9.69 0.51 0.91 9.74 12.97 0.09 4.31 5.00 Pb 7.49 8.27 62.70 22.18 9.39 169.82 5.94 3.84 11.75 3.23 13.93 17.13 0.13 4.94 26.10 28.05 1.67 3.37 46.35 16.82 7.56 Bi 0.02 0.03 0.03 0.04 0.04 0.03 0.02 0.02 0.03 0.03 0.08 0.04 0.00 0.04 0.02 0.04 0.01 0.02 0.05 0.10 0.06 元素 23MS
2-3
(3)-2223MS
2-3
(3)-2323MS
2-3
(3)-2423MS
2-3
(3)-2523MS
2-11
(1)-2623MS
2-11
(1)-2723MS
2-11
(1)-2823MS
2-11
(1)-2923MS
2-8
(2)-3023MS
2-8
(2)-3123MS
2-8
(2)-3223MS
2-8
(2)-3323MS
2-8
(2)-3423MS
2-8
(2)-3523MS
2-8
(2)-3623MS
2-8
(2)-3723MS
3-8
(1)-3823MS
3-8
(1)-3923MS
3-8
(1)-4023MS
3-8
(1)-4123MS
3-8
(1)-42Na 5.16 2.95 4.96 13.71 8.20 11.79 7.66 40.12 13.41 14.14 6.19 28.67 0.00 8.71 18.13 8.80 17.64 10.73 442.73 8.26 0.96 Mg 2.54 4.12 53.97 3.39 0.89 143.57 4.30 1392.51 2.39 0.41 0.86 12.25 0.23 0.24 2.91 0.82 10.12 0.52 274.25 73.99 0.13 Al 2.26 15.66 20.13 195.21 4.37 799.92 109.65 1421.14 1.24 2.88 2.69 16.51 2.08 0.64 0.00 0.52 57.03 0.83 1274.97 70.44 4.16 Si 311.27 314.88 198.89 586.96 209.04 1236.75 481.34 2025.39 653.92 229.51 363.51 5976.02 943.28 398.98 272.01 676.85 272.26 120.33 3584.13 380.90 410.20 P 16.46 9.22 8.22 2.64 0.00 1.27 0.00 17.63 0.00 1.97 4.13 27.30 0.00 14.37 9.75 0.00 0.00 0.00 8.19 6.52 5.72 K 0.00 8.45 5.83 45.12 0.00 291.91 57.34 107.70 0.00 0.00 0.00 5.52 2.04 0.00 0.00 0.00 5.70 0.00 380.59 1.39 0.00 
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续表1-2 元素 23MS
2-3
(3)-2223MS
2-3
(3)-2323MS
2-3
(3)-2423MS
2-3
(3)-2523MS
2-11
(1)-2623MS
2-11
(1)-2723MS
2-11
(1)-2823MS
2-11
(1)-2923MS
2-8
(2)-3023MS
2-8
(2)-3123MS
2-8
(2)-3223MS
2-8
(2)-3323MS
2-8
(2)-3423MS
2-8
(2)-3523MS
2-8
(2)-3623MS
2-8
(2)-3723MS
3-8
(1)-3823MS
3-8
(1)-3923MS
3-8
(1)-4023MS
3-8
(1)-4123MS
3-8
(1)-42Ca 0.00 114.22 256.83 73.64 10.36 1668.64 15.63 18.75 30.75 0.00 122.98 57.29 0.00 0.00 0.00 0.00 1312.71 105.94 1616.80 259.16 180.59 Sc 0.04 0.22 0.16 0.12 0.00 0.37 0.04 1.07 0.00 0.07 0.00 0.09 0.02 0.02 0.00 0.00 0.83 0.00 0.95 0.07 0.81 Ti 6.82 216.39 129.67 220.33 8.71 231.93 5.22 314.85 4.43 5.15 9.78 4.56 7.36 3.88 4.39 6.54 83.73 8.26 991.08 33.16 51.81 V 0.03 1.02 1.16 2.16 0.02 4.65 0.46 10.05 0.03 0.03 0.38 0.66 0.09 0.03 0.10 0.08 1.04 0.05 5.23 0.59 0.30 Cr 0.44 3.41 1.68 4.12 0.62 11.19 0.56 48.45 1.61 0.53 0.99 1.09 0.04 0.67 0.45 15.39 2.05 0.56 10.42 1.89 0.32 Mn 0.12 1.64 4.59 0.45 0.09 10.93 0.24 9.73 0.38 0.14 2.61 1.16 0.22 0.15 0.00 6.65 8.19 6.12 12.42 4.67 0.89 FeS22 99.66 99.35 99.32 97.07 98.90 98.79 99.25 98.22 99.29 99.15 99.40 97.37 98.93 99.37 99.73 99.43 99.37 98.74 97.23 99.23 99.26 Co 0.42 13.93 26.85 7.63 0.14 0.79 0.08 21.19 0.30 0.07 0.37 1.08 0.13 0.48 0.73 1.68 6.65 1.05 137.40 19.75 0.28 Ni 4.15 519.51 461.44 13.65 2.88 9.96 3.90 73.17 30.30 6.12 5.57 15.18 12.52 4.08 312.45 22.80 66.82 35.81 182.46 301.64 5.42 Cu 2.12 41.50 64.43 8.43 11.62 172.58 5.69 6.98 8.19 1.35 2.23 7.69 2.71 1.89 1.54 3.93 4.13 73.50 146.90 9.84 0.26 Zn 4.46 4.50 2.21 5.91 2.66 12.27 7.50 7.27 7.07 29.09 2.19 3.80 3.15 28.01 17.46 3.27 20.68 3678.15 0.00 2.09 8.67 Ga 0.03 0.03 0.01 0.03 0.00 0.08 0.01 0.43 0.03 0.11 0.05 0.02 0.04 0.02 0.04 0.00 0.07 0.04 0.10 0.06 0.07 Ge 3.98 4.80 3.96 4.17 4.26 3.46 4.43 4.71 4.43 4.70 4.32 4.46 4.08 4.34 4.03 3.36 4.66 3.98 4.58 4.24 4.79 As 1388.04 2231.8 2492.5 15830.7 5947.8 338.3 3217.7 1465.0 2858.1 4514.0 2656.8 3709.7 4578.3 2905.6 618.0 1994.3 1424.4 3826.0 2529.7 2972.7 3364.8 Se 1.63 16.00 40.92 0.00 19.61 63.18 6.64 42.05 17.50 113.28 40.50 34.68 0.00 0.00 0.00 0.00 25.41 2.15 13.23 9.13 0.75 Rb 0.04 0.02 0.00 0.20 0.03 1.44 0.14 0.49 0.00 0.17 0.02 0.07 0.00 0.00 0.00 0.00 0.05 0.09 0.56 0.05 0.01 Sr 0.03 1.05 0.15 0.04 0.05 4.44 0.05 0.16 0.28 0.03 0.01 0.05 0.12 0.01 0.03 0.18 3.51 0.05 4.76 0.21 0.20 Y 0.01 0.43 0.26 0.64 0.01 0.61 0.00 0.54 0.00 0.01 0.02 0.01 0.00 0.00 0.01 0.00 0.84 0.01 3.15 0.20 2.03 Zr 0.00 3.17 1.05 3.55 0.03 5.51 0.02 5.23 0.05 0.63 0.00 2.27 4.75 0.90 0.02 0.03 3.19 2.77 13.16 2.21 0.07 Nb 0.01 0.03 0.03 0.10 0.00 0.12 0.00 0.04 0.00 0.00 0.04 0.01 0.00 0.00 0.00 0.00 0.05 0.00 0.42 0.01 0.01 Ag 0.01 0.20 0.23 0.06 0.54 4.00 0.26 0.64 0.11 0.05 0.00 0.12 0.19 0.08 0.24 0.11 0.06 0.06 0.16 0.03 0.00 In 0.00 0.03 0.01 0.00 0.00 0.03 0.01 0.01 0.01 0.02 0.00 0.01 0.00 0.00 0.00 0.01 0.00 0.75 0.16 0.01 0.00 Sn 0.24 0.00 0.00 0.00 0.04 1.61 0.08 0.49 0.04 0.00 0.03 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.23 Sb 0.91 5.33 6.26 10.33 49.11 47.78 18.58 18.75 5.43 5.25 5.44 14.16 7.76 5.17 7.23 14.89 7.49 1.69 22.29 5.46 0.43 Ba 0.01 0.16 0.34 0.15 0.13 3.61 0.49 1.18 0.04 0.02 0.05 0.03 0.00 0.06 0.05 0.02 0.07 0.01 86.47 0.00 0.03 La 0.01 0.05 0.09 0.03 0.00 0.09 0.00 0.14 0.00 0.00 0.01 0.00 0.00 0.00 0.01 0.00 0.85 0.01 0.10 0.02 0.04 Ce 0.00 0.11 0.15 0.09 0.01 0.15 0.03 0.36 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 1.82 0.00 0.40 0.02 0.13 Pr 0.00 0.02 0.03 0.01 0.01 0.01 0.00 0.07 0.00 0.00 0.01 0.00 0.00 0.01 0.00 0.00 0.28 0.00 0.08 0.01 0.05 Nd 0.03 0.12 0.10 0.05 0.00 0.13 0.02 0.43 0.00 0.00 0.01 0.00 0.05 0.01 0.00 0.00 1.37 0.01 0.76 0.01 0.23 Sm 0.03 0.00 0.02 0.02 0.00 0.06 0.00 0.05 0.03 0.00 0.01 0.01 0.00 0.00 0.00 0.04 0.36 0.00 0.55 0.00 0.31 Eu 0.01 0.03 0.01 0.01 0.01 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.27 0.00 0.35 0.01 0.00
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续表1-3 元素 23MS
2-3
(3)-2223MS
2-3
(3)-2323MS
2-3
(3)-2423MS
2-3
(3)-2523MS
2-11
(1)-2623MS
2-11
(1)-2723MS
2-11
(1)-2823MS
2-11
(1)-2923MS
2-8
(2)-3023MS
2-8
(2)-3123MS
2-8
(2)-3223MS
2-8
(2)-3323MS
2-8
(2)-3423MS
2-8
(2)-3523MS
2-8
(2)-3623MS
2-8
(2)-3723MS
3-8
(1)-3823MS
3-8
(1)-3923MS
3-8
(1)-4023MS
3-8
(1)-4123MS
3-8
(1)-42Gd 0.00 0.06 0.05 0.10 0.00 0.03 0.00 0.07 0.04 0.03 0.00 0.00 0.09 0.04 0.06 0.00 0.39 0.02 0.60 0.03 0.45 Tb 0.00 0.02 0.01 0.02 0.00 0.02 0.00 0.02 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.04 0.00 0.11 0.01 0.06 Dy 0.00 0.11 0.08 2.58 0.01 0.13 0.00 0.09 0.00 0.00 0.00 0.00 0.06 0.03 0.00 0.00 0.29 0.02 0.61 0.06 0.54 Ho 0.00 0.06 0.01 0.04 0.01 0.01 0.01 0.05 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.03 0.00 0.11 0.01 0.08 Er 0.00 0.06 0.05 0.13 0.02 0.06 0.01 0.13 0.00 0.00 0.01 0.00 0.00 0.00 0.01 0.03 0.07 0.00 0.18 0.04 0.16 Tm 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.00 0.00 0.04 0.01 0.03 Yb 0.03 0.13 0.02 0.12 0.00 0.14 0.00 0.12 0.01 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.05 0.00 0.20 0.04 0.15 Lu 0.01 0.01 0.01 0.01 0.00 0.00 0.01 0.02 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.01 0.01 0.03 0.03 0.00 Hf 0.25 0.17 0.02 0.35 0.02 0.28 0.38 0.20 0.02 0.04 0.02 0.00 0.04 0.11 0.00 0.00 0.08 0.01 0.29 0.22 0.02 Au 0.49 0.77 0.78 15.66 2.27 0.30 0.84 0.23 1.57 0.40 0.43 1.74 0.75 0.96 0.30 1.59 0.03 0.07 0.20 0.01 0.06 Pb 0.02 32.80 37.71 1.26 274.70 306.80 69.71 82.49 17.37 7.52 4.62 43.20 17.64 18.14 128.97 37.83 16.49 2.52 34.00 12.88 0.59 Bi 0.49 0.03 0.02 0.03 0.01 0.00 0.00 0.00 0.03 0.02 0.00 0.08 0.03 0.03 0.09 0.10 0.01 0.00 0.05 0.00 0.00 备注：FeS2含量单位为%，其余元素含量单位均为10−6
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表 2 茫崖河东金矿石中磷灰石主量、微量元素和U−Pb同位素分析结果
Table 2. Analysis results of major and elements and U−Pb isotopes of apatite in Mangyahedong gold deposit
样品编号 SiO2 P2O5 CaO Sr Y La Ce Pr Nd Sm Eu Gd Tb 23MS2-8-01 0.25 43.2 56.4 993 114 14.8 48.0 10.3 68.4 28.6 76.9 30.1 4.05 23MS2-8-02 0.98 43.0 55.8 997 69.3 14.9 30.8 5.23 30.5 12.2 73.2 13.1 1.85 23MS2-8-03 0.21 43.4 56.2 1387 101 15.4 47.4 10.1 72.4 33.2 56.3 34.5 4.35 23MS2-8-04 0.24 43.5 56.1 1087 43.0 9.55 19.2 3.27 18.9 7.32 46.0 7.64 1.05 23MS2-8-05 0.35 43.1 56.4 962 49.1 9.96 18.0 3.11 18.5 7.65 33.9 8.48 1.19 23MS2-8-06 0.28 43.3 56.3 921 74.1 14.0 25.5 4.43 27.0 11.6 31.5 12.8 1.80 23MS2-8-07 0.57 43.6 55.7 938 50.4 11.8 20.1 3.26 19.8 8.31 24.7 9.18 1.26 23MS2-8-08 0.15 43.2 56.5 1004 34.6 8.73 12.3 1.81 9.87 4.00 28.8 4.22 0.65 23MS2-8-09 0.29 40.0 59.5 1141 46.7 14.9 21.3 3.00 17.0 6.33 27.3 6.52 1.00 23MS2-8-10 0.91 43.5 55.5 937 49.3 13.9 20.8 3.32 19.7 8.16 21.6 8.85 1.21 23MS2-8-11 0.050 43.6 56.2 1080 39.3 10.6 15.6 2.41 13.4 5.61 25.5 5.54 0.82 23MS2-8-12 0.090 43.8 56.0 807 48.5 7.90 13.1 2.09 12.0 4.99 31.3 5.55 0.89 23MS2-8-13 0.034 43.9 55.9 1221 50.5 11.3 23.4 4.33 27.8 11.5 31.8 12.3 1.58 23MS2-8-14 0.29 43.8 55.8 655 44.1 32.1 31.5 3.68 15.7 4.45 13.8 4.85 0.72 23MS2-8-15 0.50 43.5 55.9 721 50.7 12.7 21.4 3.35 18.4 6.49 18.3 7.33 1.04 23MS2-8-16 1.38 42.9 55.5 1377 58.3 11.6 28.8 5.55 34.4 13.2 49.4 13.5 1.75 23MS2-8-17 0.20 43.4 56.3 1162 46.8 11.1 25.4 4.75 31.1 12.2 30.4 11.9 1.52 23MS2-8-18 0.26 43.6 56.0 1049 21.6 8.77 12.0 1.68 8.07 2.20 7.58 2.38 0.36 23MS2-8-19 0.16 43.7 56.0 722 36.0 9.85 17.1 2.82 16.6 6.18 15.6 6.77 0.94 23MS2-8-20 0.15 43.7 56.0 958 29.7 9.66 14.3 2.09 10.7 3.31 10.1 3.73 0.55 23MS2-8-21 0.27 43.9 55.7 1045 38.4 13.0 18.7 2.95 17.3 6.80 19.4 7.22 1.01 23MS2-8-22 0.15 43.2 56.5 1046 36.5 10.2 14.3 2.10 11.7 4.73 21.8 5.02 0.72 23MS2-8-23 0.43 43.0 56.5 743 38.5 14.5 19.2 2.84 16.5 6.03 12.3 6.61 0.89 23MS2-8-24 2.62 41.0 56.2 1289 84.3 15.0 41.8 8.54 55.2 22.8 66.6 24.0 3.03 23MS2-8-25 0.083 43.9 55.9 1020 64.0 11.6 26.1 5.36 38.6 18.6 27.3 20.2 2.53 23MS2-8-26 3.82 39.4 56.7 1223 42.2 9.50 17.4 3.11 19.2 8.46 24.9 8.45 1.13 23MS2-8-27 0.29 43.9 55.7 1060 44.6 12.9 19.6 3.17 18.6 7.49 19.8 8.06 1.09 23MS2-8-28 0.64 43.4 55.8 1076 52.4 16.8 23.0 3.42 18.6 6.60 18.8 7.31 1.04 23MS2-8-29 0.47 43.7 55.6 1162 58.0 17.7 22.0 2.95 14.2 4.68 17.2 5.18 0.80 23MS2-8-30 0.064 43.7 56.1 1179 27.3 8.26 10.5 1.49 7.62 2.81 23.7 2.91 0.45 23MS2-8-31 0.16 43.9 55.8 958 38.4 12.1 18.4 2.89 15.9 5.93 14.3 6.40 0.89 23MS2-8-32 0.45 43.8 55.6 1065 33.4 9.92 14.5 2.13 11.6 4.20 11.7 4.52 0.67 23MS2-8-33 0.21 43.8 55.9 1029 38.7 11.3 16.8 2.54 13.9 5.15 12.9 5.61 0.80 23MS2-8-34 0.22 43.8 55.8 807 22.1 10.4 10.6 1.39 6.31 1.99 6.50 2.24 0.34 23MS2-8-35 0.35 43.8 55.7 808 32.7 12.0 13.7 1.85 9.37 2.97 7.90 3.43 0.50 23MS2-8-36 0.20 44.0 55.7 846 52.5 17.6 25.6 4.46 29.2 13.1 18.6 14.6 1.82 23MS2-8-37 0.19 43.9 55.8 1028 23.9 8.34 11.0 1.61 8.28 2.88 7.81 3.10 0.44 23MS2-8-38 0.13 43.9 55.8 804 45.4 13.3 20.7 3.37 20.6 8.18 17.1 8.74 1.17 23MS2-8-39 1.60 43.3 55.0 708 39.9 13.5 18.5 2.73 14.2 4.62 11.7 5.33 0.78 23MS2-8-40 0.45 43.8 55.6 704 61.9 28.3 29.6 3.74 17.5 5.41 15.6 6.29 0.96 最小值 0.03 39.36 54.98 654.84 21.59 7.90 10.52 1.39 6.31 1.99 6.50 2.24 0.34 最大值 3.82 44.00 59.53 1387.40 114.49 32.10 48.05 10.33 72.41 33.21 76.91 34.54 4.35 平均值 0.50 43.32 56.03 993.00 48.32 12.99 21.46 3.58 21.37 8.52 25.75 9.12 1.24
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