Geochemistry of pyrite and its implications for exploration of the Jiuzhanggou gold deposit in western Henan
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摘要: 黄铁矿是金矿床中重要的载金矿物，其地球化学特征不仅在矿床成因中具有重要的指示作用，也是重要的找矿信息。豫西九仗沟金矿床作为熊耳山金矿集区典型的构造蚀变岩型金矿床，是探讨黄铁矿对金矿床成因指示及找矿标志的理想矿床。通过开展九仗沟金矿床构造蚀变带调查，采集+260 m至−20 m垂深280 m的构造蚀变岩样品8件，对蚀变岩中黄铁矿进行矿物电子探针及激光剥蚀等离子体质谱分析，探讨不同蚀变带黄铁矿的元素含量特征及变化规律，以期获得黄铁矿对矿床成因及深部找矿的指示意义。研究结果表明，九仗沟金矿床+260 m中段至−20 m中段区间可划分为4个蚀变带，蚀变岩中黄铁矿均为成矿期黄铁矿，黄铁矿Fe、S元素含量显示其主要为硫亏型；微量元素聚类分析显示；Au与Cu、As、Sb、Zn、Ag、Te、Se、Pb为一组，属于中—低温元素组合；Co/Ni比值为1～10，Co-Ni-As图解显示黄铁矿为岩浆热液成因；黄铁矿中Au与Cu、As、Sb、Zn、Ag、Te、Pb呈正相关性，在第1—3蚀变带其含量同步逐渐降低，而在第4蚀变带则出现跳跃上升，第4蚀变带与第1—3蚀变带为不同期次热液成矿活动的产物。根据第1—3蚀变带的垂向延伸情况，推测第4蚀变带延深可达−60 m标高，深部至少还可以勘探一个中段（40 m），具有良好的找矿前景。黄铁矿中Au、Cu、As、Sb、Zn、Ag、Te、Se和Pb等元素含量及Au/As、Au/Ag、Co/Ni比值对垂向蚀变分带具有重要的指示作用，黄铁矿的微量元素标志是金矿床深部找矿靶区的重要信息。Abstract:
Objective Pyrite is a common auriferous mineral in gold deposits. Its mineral geochemistry not only plays a significant role in elucidating ore genesis, but also provides important information for the exploration of deposits. The Jiuzhanggou gold deposit in western Henan Province is a gold deposit typical of tectonically altered rocks in the Xiong'ershan gold ore cluster, and it is an ideal deposit to study the genetic indications and prospecting signs of pyrite in gold deposits. Methods In this study, the tectonically altered zones of the Jiuzhanggou gold deposit were investigated, and 8 samples of tectonically altered rocks were collected over a vertical depth of 280 m, from +260 m to −20 m. Electron microprobe and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of pyrite from the altered rocks were carried out, and the characteristics and variations of the element contents in pyrite of differently altered zones were obtained, revealing the indications of pyrite for ore genesis and prospection at greater depth. Results The interval between the +260 m and −20 m levels of the Jiuzhanggou gold deposit can be divided into four altered zones. Microscopic observation of the altered rocks shows that pyrite was formed during the metallogenic period. Given its Fe and S contents, most of the pyrite is sulfur-depleted. Cluster analysis shows that Au, Cu, As, Sb, Zn, Ag, Te, Se and Pb in pyrite belong to a group of hypothermal-mesothermal elements. Conclusion The Co/Ni ratio (1～10) and the Co-Ni-As diagram indicate a magmatic hydrothermal origin of pyrite. The Au in pyrite is positively correlated with Cu, As, Sb, Zn, Ag, Te, and Pb. The contents of these elements gradually decrease in the 1st～3rd altered zones, but increase in the 4th zone. It is speculated that the 1st～3rd altered zones are the product of the same hydrothermal mineralization activity, while the 4th altered zone is the product of another hydrothermal mineralization activity. According to the vertical extent of the 1st～3rd altered zones, it is speculated that the 4th altered zone may reach −60 meters. At least one level (40 m) can be explored at depth, which has a good prospecting potential. Significance The contents of Au, Cu, As, Sb, Zn, Ag, Te, Se, and Pb and the ratios of Au/As, Au/Ag, and Co/Ni in pyrite reflect the vertical mineralization zoning. These trace elements in pyrite are essential markers for prospecting targets in the deeper parts of gold deposits. -
Key words:
- pyrite /
- trace elements /
- metallogenetic prediction /
- Jiuzhanggou gold deposit /
- western Henan
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图 1 豫西九仗沟金矿床区域地质简图
a—豫西熊耳山−外方山地区地质矿产简图（Sheng et al.，2022a）；b—庙岭−九仗沟金矿带地质简图（刘玉刚等，2022）
Figure 1. Simplified regional geological maps of the Jiuzhanggou gold deposit in western Henan
(a) Simplified geological and mineral resource map of the Xiong'ershan-Waifangshan area in western Henan (after Sheng et al., 2022a); (b) Simplified geological map of the Miaoling-Jiuzhanggou gold belt (after Liu et al., 2022)
图 2 九仗沟金矿床地质图
a—矿床平面地质图（据朱随洲等，2022）；b—00线剖面地质图（剖面位置见图2a；据丁培超等，2020）
Figure 2. Geological map of the Jiuzhanggou gold deposit
(a) Geological plan map of the deposit (after Zhu et al., 2022); (b) The section No. 00 of the deposit (after Ding et al., 2020)
图 3 九仗沟金矿床纵剖面图及蚀变分带
1—第1蚀变带（+300~+240 m）；2—第2蚀变带（+240~+120 m）；3—第3蚀变带（+120~+80 m）；4—第4蚀变带（+80～−20 m）
Figure 3. Longitudinal section of the Jiuzhanggou gold deposit, indicating alteration zones and sampling locations
1—1st altered zone (+300~+240 m); 2—2nd altered zone (+240~+120 m); 3—3rd altered zone (+120~+80 m); 4—4th altered zone (+80～−20 m)
图 4 蚀变岩中硫化物结构显微照片
Py—黄铁矿；Gn—方铅矿；Cpy—黄铜矿a—浸染状细粒黄铁矿；b—脉状黄铁矿；c—碎裂状黄铁矿；d—与方铅矿和黄铜矿共生的黄铁矿
Figure 4. Micrographs of textures of sulfide in altered rocks
(a) Disseminated fine-grained pyrite; (b) Vein texture pyrite; (c) Cataclastic pyrite; (d) Pyrite intergrown with chalcopyrite and galenaPy—pyrite; Gn—galena; Cpy—chalcopyrite
图 5 九仗沟金矿床各蚀变带黄铁矿δFe-δS图解
1—第1蚀变带；2—第2蚀变带；3—第3蚀变带；4—第4蚀变带；I—第I象限富Fe、S区；II—第II象限贫Fe富S区；III—第III象限贫Fe、S区；VI—第VI象限富Fe贫S区
Figure 5. δFe-δS diagram of pyrite from different altered zones in the Jiuzhanggou gold deposit
1—1st altered zone; 2—2nd altered zone; 3—3rd altered zone; 4—4th altered zone; I—Quadrant I Fe-, S-rich area; II—Quadrant II Fe-poor, S-rich area; III—Quadrant III Fe-, S-poor area; VI—Quadrant VI Fe-rich, S-poor area
图 6 蚀变岩黄铁矿微量元素含量箱形图
1—第1蚀变带；2—第2蚀变带；3—第3蚀变带；4—第4蚀变带a—Zn；b—Pb；c—As；d—Sb；e—Au；f—Ag；g—Cu；h—Ni；i—Te；j—Co；k—Sn；l—Bi；m—Mo；n—Se
Figure 6. Box plots of trace elements in pyrite from altered rocks
(a) Zn; (b) Pb; (c) As; (d) Sb; (e) Au; (f) Ag; (g) Cu; (h) Ni; (i) Te; (j) Co; (k) Sn; (l) Bi; (m) Mo; (n) Se1—1st altered zone; 2—2nd altered zone; 3—3rd altered zone; 4—4th altered zone
图 7 黄铁矿的主成分分析得分及载荷图
1—第1蚀变带；2—第2蚀变带；3—第3蚀变带；4—第4蚀变带
Figure 7. Scores and loadings graph of the principal component analysis of pyrite
1—1st altered zone; 2—2nd altered zone; 3—3rd altered zone; 4—4th altered zone
图 9 蚀变岩黄铁矿微量元素相关性图解
图例中1、2、3、4分别代表了第1、2、3、4蚀变带的黄铁矿a—Au与Cu图解；b—Au与As图解；c—Au与Sb图解；d—Au与Zn图解；e—Au与Ag图解；f—Au与Te图解；g—Au与Pb图解；h—Ag与Cu图解；i—Sb与Cu图解；j—Pb与Ag图解；k—Ag与Te图解；l—Sb与Ag图解
Figure 9. Correlation of trace elements in pyrite from altered rocks
(a) Au vs Cu; (b) Au vs As; (c) Au vs Sb; (d) Au vs Zn; (e) Au vs Ag; (f) Au vs Te; (g)Au vs Pb; (h) Ag vs Cu; (i) Sb vs Cu; (j) Pb vs Ag; (k) Ag vs Te; (l) Sb vs Ag1, 2, 3, and 4 are pyrite from the 1st, 2nd, 3rd, and 4th altered zones, respectively.
图 10 黄铁矿成因判别图解
图例中1、2、3、4分别代表了第1、2、3、4蚀变带的黄铁矿a—As-Au相对摩尔含量图解（Reich et al.，2005提出的Au溶解度线）；b—Ni-Co元素相对含量图解；c—Co-As-Ni质量占比三角图（严育通等，2012）
Figure 10. Genetic discrimination of pyrite
(a) As vs Au molar proportion diagram (Au saturation line after Reich et al.，2005); (b) Ni vs Co relative abundance diagram; (c) Co-As-Ni relative abundance percent triangle diagram (Yan et al., 2012)1, 2, 3, and 4 are pyrite from the 1st, 2nd, 3rd, and 4th altered zones, respectively.
图 11 黄铁矿As与温度的关系（Babedi et al.，2023）
图例中1、2、3、4分别代表了第1、2、3、4蚀变带的黄铁矿
Figure 11. Correlation between the As content and the temperature of pyrite （after Babedi et al.，2023）
1, 2, 3, and 4 are pyrite from the 1st, 2nd, 3rd, and 4th altered zones, respectively.
图 12 蚀变岩黄铁矿微量元素及相关系数的空间变化图解
图例中1、2、3、4分别代表了第1、2、3、4蚀变带的黄铁矿a、b、c、d、e、f、g—为矿床垂向上Au、As、Au/As、Ni、Co、Au/Ag、Co/Ni图解；h—Ag/Au与Co/Ni图解（I—第I象限富Au、Co区；II—第II象限贫Au富Co区；III—第III象限贫Co贫Au区；VI—第VI象限贫Co富Au区）
Figure 12. Spatial variation of trace elements and associated coefficients of pyrite in altered rocks
a, b, c, d, e, f, g—are Au, As, Au/As, Ni, Co, Au/Ag, Co/Ni vertical variation diagram; h—Ag/Au vs Co/Ni (in Figure 12h I—Quadrant I Au-, Co-rich area; II—Quadrant II Au-poor, Co-rich area; III—Quadrant III Co-, Au-poor area; VI—Quadrant VI Co-rich, Au-poor area)1, 2, 3, and 4 are pyrite from the 1st, 2nd, 3rd, and 4th altered zones, respectively.
图 13 基于蚀变岩中黄铁矿微量元素的金矿勘查模型
1—第1蚀变带；2—第2蚀变带；3—第3蚀变带；4—第4蚀变带
Figure 13. Gold exploration model based on trace elements of pyrite in altered rocks
1—1st altered zone; 2—2nd altered zone; 3—3rd altered zone; 4—4th altered zone
表 1 蚀变岩样品特征
Table 1. Characteristics of samples of altered rocks
样号 采样位置 样品特征 所在蚀
变带45 260 m中段穿脉7 矿化蚀变火山角砾岩，含有张性的热液脉 1 47 220 m中段穿脉7 矿化蚀变角砾凝灰岩，局部含有团包状硫化物，含有张性的热液脉，可见黄铜矿、方铅矿 2 48 130 m中段穿脉1-3 矿化蚀变角砾凝灰岩，张性细网脉比较发育，脉宽小于0.5 mm，见少量黄铁矿、方铅矿 2 49 100 m中段穿脉1 矿化蚀变角砾凝灰岩，张性细网脉比较发育，脉宽小于0.5 mm，硫化物较为发育 3 50 100 m中段穿脉5 黄铁绢云岩，硫化物网脉较发育，脉宽1～2 mm，脉石矿物较少，发育深、浅两组脉，略具压性特征 3 52 50 m中段穿脉01 矿化蚀变火山角砾凝灰岩，发育多期张性网脉，第二期网脉中角砾明显 4 54 20 m中段穿脉1-3 矿化蚀变角砾岩，角砾有压性特征 4 55 −20 m中段穿脉3 矿化蚀变岩屑凝灰岩，发育浸染状−网脉状矿化 4 
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表 2 九仗沟金矿床蚀变岩黄铁矿电子探针测试结果（×10−2）
Table 2. Electron microprobe data of pyrite from tectonically altered rocks of the Jiuzhanggou gold deposit （×10−2）
测点 Fe Cu Pb Zn Au Ag Te As S 合计 S/Fe δFe δS 第1带 45.1 45.45 0.05 0.02 53.90 99.41 2.065 −2.363 0.842 45.2 46.81 0.02 0.05 52.21 99.09 1.942 0.559 −2.320 45.3 46.08 0.04 0.08 0.03 52.87 99.10 1.998 −1.010 −1.085 45.4 46.56 0.03 0.08 0.03 0.02 / / 53.73 100.46 2.009 0.021 0.524 45.5 45.71 0.37 0.02 0.03 0.01 / / 50.37 96.51 1.919 −1.805 −5.762 45.6 46.33 0.00 0.02 / / 52.85 99.21 1.986 −0.473 −1.123 45.7 45.73 0.05 0.01 / / 53.21 99.00 2.026 −1.762 −0.449 45.8 45.81 0.07 0.04 0.06 / / 53.53 99.52 2.035 −1.590 0.150 平均值 46.06 / / / / / / / 52.83 99.04 1.998 −1.053 −1.153 中位数 45.95 / / / / / / / 53.04 99.16 2.004 −1.300 −0.767 第2带 47.1 49.02 0.02 0.02 50.59 99.65 1.998 5.306 −5.351 47.3 46.20 0.02 53.77 99.99 1.797 −0.752 0.599 47.4 46.07 0.04 0.06 0.04 53.48 99.68 2.029 −1.031 0.056 47.5 46.00 0.02 53.28 99.31 2.027 −1.182 −0.318 47.8 46.69 0.05 0.05 0.03 53.49 100.32 2.022 0.301 0.075 47.1 46.45 0.04 0.04 54.12 100.65 2.017 −0.215 1.254 48.1 46.06 0.04 0.03 0.02 / / 52.72 98.87 1.995 −1.053 −1.366 48.2 45.55 0.04 0.03 0.05 / / 53.49 99.16 1.993 −2.148 0.075 48.3 45.62 0.09 0.04 0.00 / / 51.68 97.44 2.031 −1.998 −3.312 48.4 45.59 0.05 0.02 / / 51.58 97.25 2.045 −2.062 −3.499 48.5 45.94 0.04 / / 53.26 99.25 1.973 −1.310 −0.355 48.6 45.96 0.10 / / 52.74 98.79 1.970 −1.267 −1.328 48.7 46.06 0.16 0.08 0.02 / / 53.49 99.82 2.019 −1.053 0.075 48.8 45.74 0.02 / / 53.64 99.39 1.998 −1.740 0.335 48.9 45.01 0.03 0.10 0.03 / / 53.21 98.37 2.022 −3.308 −0.449 48.1 45.42 0.02 0.07 0.04 / / 52.96 98.50 2.042 −2.427 −0.917 平均值 46.09 / / / / / / / 52.97 99.15 1.999 −0.996 −0.900 中位数 45.98 / / / / / / / 53.27 99.28 2.018 −1.225 −0.337 第3带 50.3 45.95 0.04 0.02 / / 53.53 99.55 2.058 −1.289 0.150 50.6 45.78 0.04 / / 54.72 100.55 2.002 −1.654 2.376 50.7 46.28 0.07 0.05 / / 52.83 99.24 2.029 −0.580 −1.160 50.8 46.56 0.05 0.12 / / 52.23 98.96 2.081 0.021 −2.283 平均值 46.14 / / 0.06 / / / / 53.33 99.58 2.043 −0.875 −0.229 中位数 46.12 / / 0.05 / / / / 53.18 99.40 2.044 −0.935 −0.505 第4带 52.1 45.50 0.06 0.05 0.04 / 51.83 97.48 1.988 −2.256 −3.031 52.4 45.75 0.04 0.03 0.02 / 51.95 97.78 1.953 −1.719 −2.806 52.5 45.77 0.04 / 52.36 98.17 2.013 −1.676 −2.039 52.6 45.45 0.02 0.05 0.06 0.10 / 50.92 96.60 1.984 −2.363 −4.733 52.8 44.98 0.03 0.04 0.09 / 52.44 97.57 1.977 −3.373 −1.890 54.1 48.95 0.08 0.02 0.02 / 54.21 103.28 1.992 5.156 1.422 54.2 46.39 0.02 / 54.01 100.43 1.951 −0.344 1.048 54.3 46.65 0.03 0.05 0.05 0.02 / 53.58 100.38 2.030 0.215 0.243 54.7 45.94 0.04 0.09 / 53.53 99.59 1.929 −1.310 0.150 54.8 46.00 0.02 0.03 0.03 / 53.02 99.10 2.027 −1.182 −0.804 55.6 45.41 / 0.01 53.41 98.83 2.000 −2.449 −0.075 55.7 45.31 0.04 0.03 / 0.02 53.29 98.70 2.029 −2.664 −0.299 55.8 44.77 0.03 0.03 0.06 0.03 / 53.88 98.80 2.007 −3.824 0.804 平均值 45.91 / / / / / / / 52.96 98.98 1.991 −1.368 −0.924 中位数 45.75 / / / / / / / 53.29 98.7 1.992 −1.719 −0.299 注：“/”表示未测；空白表示低于检测限；S/Fe为原子比
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表 3 九仗沟金矿床矿化蚀变岩黄铁矿LA-ICP-MS测试结果（×10−6）
Table 3. LA—ICP—MS data of pyrite from the tectonically altered rocks of the Jiuzhanggou gold deposit (×10−6)
测点 S Co Ni Cu Zn As Se Mo Ag Sn Sb Te Au Pb Bi 第1带 45-1 314534.91 30.77 41.16 467.86 47.08 22373.42 4682.16 0.51 219.99 7352.59 865.84 4059.30 0.01 45-2 331241.10 58.02 77.23 191.82 2682.09 12403.78 770.80 119.21 4040.89 516.84 5214.27 45-3 313316.89 52.70 46.62 148.97 3044.75 12729.02 621.41 0.33 320.24 2462.06 571.50 1031.78 0.01 45-4 307157.24 19.75 25.86 357.42 24.14 22497.85 22.40 3154.18 0.25 408.59 5432.86 780.42 1973.63 0.01 45-5 331751.25 27.43 25.36 1567.97 591.32 26085.62 27.49 1292.62 0.56 381.66 3663.10 714.50 1799.68 0.01 45-6 342514.13 37.99 44.59 95.90 637.06 10316.97 751.65 167.70 3956.25 753.55 1128.58 45-7 330354.27 13.06 28.96 120.37 16.53 14768.53 27.29 1033.28 0.32 133.65 2867.33 608.21 831.34 45-8 335784.77 35.10 37.85 102.41 17306.38 14710.66 27.59 1575.52 1.05 173.53 4151.51 702.09 1659.99 平均(n=8) 325831.82 34.35 40.95 381.59 3043.67 16985.73 26.19 1735.20 0.50 240.57 4240.82 689.12 2212.32 0.01 中位数 330797.69 32.94 39.51 170.40 614.19 14739.60 27.39 1162.95 0.42 196.76 3998.57 708.30 1729.84 0.01 方差 136887097.86 204.74 248.23 216680.63 30327764.96 29487099.19 173.91 1818763.76 0.10 11359.06 2077152.82 11823.82 2178828.11 极差 35356.89 44.96 51.87 1472.07 17289.85 15768.65 5.19 4060.75 0.80 289.38 4890.53 349.00 4382.93 0.01 第2带 47-1 299144.45 31.24 13.17 187.48 279.45 545.78 1.59 268.08 1.43 81.65 319.05 17.02 345.47 0.25 47-2 372280.64 0.29 1.58 1.02 1.69 3.33 0.43 1.05 47-3 359972.18 97.63 32.03 1404.50 13.85 12501.72 22.00 68.03 3.94 154.99 559.35 136.28 411.33 0.64 47-4 338727.58 53.74 44.99 302.48 2695.30 17510.70 19.85 270.46 1399.58 3.42 147.59 1973.67 599.59 383.25 0.07 47-5 329348.76 122.64 54.49 721.46 14.96 12242.35 29.37 0.44 481.16 345.12 1072.16 158.44 1401.17 0.36 47-6 362872.12 82.88 18.57 27.53 6.83 96.67 826.15 7.78 8.36 37.48 0.92 124.81 0.09 47-7 381262.54 59.00 15.05 103.36 17.17 1.18 2.25 9.36 0.07 21.70 0.07 47-8 349997.96 34.11 37.63 112.92 738.80 2830.19 1072.48 2.13 33.28 1123.44 6.65 171.09 0.28 47-9 383906.10 23.41 2.15 260.00 3.20 203.11 75.16 2.20 27.09 11.97 0.30 99.13 0.58 47-10 389696.13 9.78 1.47 26.13 3.89 32.14 11.90 10.76 4.27 48.51 0.70 8536.35 0.23 48-1 289603.21 3.64 9.92 1592.57 62.75 27675.40 0.18 50.59 1.67 780.86 37.29 19.65 876.45 0.03 48-2 343709.34 19.24 17.10 126.92 1.25 3691.67 7.85 0.96 152.17 2.49 1.01 393.86 0.03 48-3 332238.60 17.76 20.85 174.00 29.27 8782.83 12.93 2.72 197.94 5.21 2.00 469.29 0.06 48-4 336590.76 8.91 14.55 698.68 540.96 29186.49 2.45 42.18 4.19 958.55 34.52 14.19 1448.35 0.08 48-5 346017.61 143.44 55.32 153.38 70.39 749.01 2.41 2.20 25.57 2.25 0.19 166.53 0.08 48-6 356325.56 65.74 75.47 2969.04 98.03 749.89 9.72 12.42 1.07 23.73 5.05 0.80 103.07 0.27 48-7 338718.30 41.11 53.74 262.41 1105.22 10447.92 22.56 4.66 528.55 12.44 4.26 1090.63 0.02 48-8 335901.74 19.20 19.80 174.65 4.69 14242.35 0.30 16.36 2.67 418.45 13.79 3.66 684.68 0.03 48-9 334513.61 20.57 23.15 351.81 9.30 15006.54 0.28 26.31 2.85 425.44 14.76 6.68 818.78 0.02 48-10 314452.46 7.63 10.31 947.57 6.33 22334.96 0.67 57.62 2.76 754.25 40.98 19.54 1165.17 0.02 平均(n=20) 344763.98 43.10 27.36 529.92 315.80 9413.00 23.74 99.94 178.18 2.62 253.59 266.35 49.62 935.61 0.17 中位数 341218.46 27.33 19.80 223.74 22.12 8782.83 22.00 2.02 19.46 2.70 149.88 24.64 3.96 402.60 0.08 方差 656190573.80 1582.99 419.74 506321.46 390352.28 88378055.87 74.35 34482.54 139591.03 2.29 84191.50 265583.58 17766.47 3239087.59 0.03 极差 100092.92 143.15 74.00 2967.46 2694.05 29169.32 9.52 825.97 1398.56 3.70 956.86 1971.42 599.52 8535.30 0.62 第3带 50-1 263769.51 2.11 11.65 1.60 6.91 0.26 0.24 7.84 50-2 279260.40 23.24 6.09 9.80 1.50 35.45 0.52 0.29 0.80 20.73 50-3 249046.29 13.23 3.64 361.41 10.94 5641.10 18.88 0.97 346.66 19.58 3.96 619.66 50-4 252044.79 9.38 1.08 11.98 1.25 93.13 0.75 0.38 2.76 0.59 0.06 26.23 50-5 261174.22 4.66 9.85 1.52 10.66 0.66 0.24 0.82 0.48 10.09 50-6 270194.99 48.15 11.07 34.04 4.26 114.92 1.65 1.18 7.28 1.18 0.05 123.89 50-7 250984.14 53.22 16.25 53.91 6.54 171.79 2.22 3.25 21.41 0.09 152.51 50-8 270926.49 37.87 8.11 30.70 36.63 205.25 1.24 1.10 5.35 0.48 0.03 92.82 平均(n=8) 262175.10 23.98 7.71 65.42 8.03 784.90 3.27 0.95 55.01 4.46 0.84 131.72 中位数 262471.87 18.24 7.10 21.34 2.93 104.03 1.00 0.68 5.35 0.59 0.06 59.53 方差 104572907.64 351.62 29.58 12732.67 126.90 3373548.34 35.16 0.89 12773.28 40.42 1.69 36709.90 极差 30214.11 51.11 15.17 351.61 35.38 5634.19 18.62 3.01 345.86 19.10 3.93 611.82 第4带 52-1 285433.79 6.02 1.40 45.04 195.93 3308.10 2.26 1.60 54.14 9.76 0.65 188.20 52-2 325089.23 12.35 2.15 22.78 1.87 105.48 0.43 1.27 0.45 0.03 28.52 52-3 359354.34 5.46 0.79 4.50 758.55 0.10 2.74 1.19 0.46 5.98 52-4 311181.57 2.58 1.03 7210.62 125.35 26898.70 54.44 0.58 246.61 22.90 7.13 248.73 52-5 320269.21 40.83 16.13 17.81 13.72 4856.86 0.70 1.09 31.00 1.99 0.70 129.36 52-6 306594.66 64.04 13.24 68.36 3.66 3595.30 4.23 7.48 20.49 17.68 17.90 52-7 364431.97 84.52 32.77 0.98 6.19 38.62 0.06 0.43 3.20 9.23 52-8 343056.87 30.78 5.16 414.40 15.35 24231.17 8.99 0.64 291.16 136.11 81.01 341.03 54-1 282402.97 4.48 1.71 23.00 26.60 338.97 24.08 5.99 215.31 9.93 178.91 54-2 230330.00 101.56 50.69 48.02 6.29 306.33 2.09 0.26 50.93 24.72 0.10 720.22 54-3 261971.00 20.19 7.70 29.24 156.90 130.69 1.24 32.44 5.79 0.06 313.61 54-4 306347.34 0.26 2.69 0.37 0.11 54-5 275576.83 0.27 1.03 18.53 4.58 11.50 1.37 1.95 54-6 299755.91 1.89 1.87 3.67 79.86 0.53 4.82 1.11 2.17 54-7 300998.85 29.33 12.57 3.75 273.76 9.07 2.05 39.28 4.49 9.64 54-8 254737.91 878.74 274.64 109.33 1.69 4171.40 14.08 0.69 33.72 1792.95 22.14 1105.27 55-1 248768.14 34.97 11.34 324.58 174.99 929.20 0.39 11.15 0.26 87.58 44.12 8.57 246.38 55-2 292527.61 58.02 25.07 415.48 87.88 637.51 880.46 97.33 0.40 90.07 145.58 43.68 3083.01 55-3 267990.03 2.52 69.74 13.51 396.91 0.44 0.91 0.23 7.21 3.65 0.25 60.76 55-4 222558.70 0.81 18.82 437.81 87.64 1.26 0.35 1.35 1.17 27.18 55-5 214405.02 2.37 10.39 17.25 18.23 1.16 0.17 3.40 5.93 0.31 53.20 55-6 283070.03 14.08 5.35 138.41 711.77 160.09 3.38 0.33 31.33 7.39 1.39 102.63 55-7 235163.78 6.05 2.91 47.59 306.04 209.18 2.87 10.63 4.94 1.00 530.94 55-8 282488.50 10.86 3.90 77.24 3300.52 791.36 3.88 61.03 40.15 8.52 124.00 平均(n=24) 286437.68 58.87 24.76 395.86 294.91 3014.38 293.76 10.82 0.61 50.08 110.58 10.03 313.71 中位数 284251.91 11.61 5.35 45.04 26.60 322.65 0.44 2.87 0.40 31.00 9.76 1.37 113.32 方差 1569039297.62 29985.05 2973.06 2043526.92 437330.95 48354159.08 30952.03 458.83 0.19 5372.81 126596.48 322.86 400884.62 极差 150026.95 878.48 273.85 7209.64 3298.83 26896.01 880.07 97.27 1.43 290.73 1792.58 80.98 3082.90 注：空白表示低于检测限
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