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| Geological features, geochemical and geophysical anomaly characteristics and prospecting potential of the Taoxi lead zinc deposit in Xiuning, Anhui Province |
Wang-Fei WENG1( ), De-En WANG1, Yong-Hui WANG1, Ji-Ming WU1, Jun YAN2, Ding-Yuan ZHANG3, Jie FANG3 |
1. No. 332 Geological Party, Bureau of Geology and Mineral Resources Exploration of Anhui Province, Huangshan 245000, China
2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
3. Nanjing Geological Survey Center of China Geological Survey, Nanjing 210016, China |
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Abstract The Taoxi lead zinc ore deposit is located neighboring the central area of gold polymetallic deposit integrated exploration area of Xiuning-Shexian County in Anhui Province, and it is provided with favorable metallogenic geological conditions. The Taoxi lead zinc ore deposit is controlled by the EW-trending fault with mutiperiodic activity features, and tensional normal fault of the third stage is closely related to the lead-zinc mineralization. The lead-zinc ore deposit was formed by cavity filling through migration of ore fluids into fissure zones, and the orebodies exhibit vein-like form. The geochemical composite anomaly of AP18 obtained by soil geochemical exploration is oval-shaped with EW-trending long axis, and it is controlled by the fault. The geochemical anomaly consists of multielements such as Au, Ag, Cu, Pn and Zn, and its area is 2.6105 km2. The geophysical anomalies of M2 and M3 were detected by high precision magnetic method, and they are consistent with geological features and geochemical anomaly. The results of IP intermediate gradient and IP sounding prove the actual existence of the anomaly, and also reveal the polarization body characteristics in subsurface. Through comprehensive analysis of geological features and geochemical and geophysical characteristics of the Taoxi area, the authors hold that the area has further ore-prospecting potential for polymetallic deposits.
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Received: 01 August 2016
Published: 20 February 2018
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| 样号及位置 | 岩性 | 元素含量 | 14TX006
(榆村) | 花岗斑岩 | SiO2 | TiO2 | Al2O3 | Fe2O3 | MnO | MgO | CaO | K2O | Na2O | P2O5 | BaO | Cr2O3 | SrO | LOI | Total | | 64.19 | 0.61 | 13.91 | 4.01 | 0.06 | 2.83 | 1.41 | 3.2 | 1.22 | 0.174 | 0.05 | <0.01 | 0.02 | 7.54 | 99.22 | | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Y | | 22.2 | 45.2 | 5.57 | 22 | 4.51 | 1.13 | 4.29 | 0.63 | 3.08 | 0.58 | 1.53 | 0.21 | 1.32 | 0.18 | 15.7 | | Ba | Cr | Cs | Ga | Hf | Nb | Rb | Sr | Ta | Th | U | V | W | Y | Zr | | 393 | 10 | 37.7 | 18.2 | 4.3 | 10.4 | 173.5 | 200 | 1.1 | 8.74 | 4.19 | 82 | 3 | 15.7 | 143 | 14TX007-3
(桃溪) | 花岗斑岩 | SiO2 | TiO2 | Al2O3 | Fe2O3 | MnO | MgO | CaO | K2O | Na2O | P2O5 | BaO | Cr2O3 | SrO | LOI | Total | | 62.64 | 0.56 | 13.71 | 2.88 | 0.19 | 4.69 | 1.85 | 3.08 | 0.09 | 0.173 | 0.04 | <0.01 | 0.01 | 9.54 | 99.45 | | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Y | | 27.4 | 55.4 | 6.74 | 26.4 | 5.28 | 1.26 | 4.16 | 0.62 | 3.06 | 0.55 | 1.5 | 0.21 | 1.17 | 0.18 | 14.9 | | Ba | Cr | Cs | Ga | Hf | Nb | Rb | Sr | Ta | Th | U | V | W | Y | Zr | | 335 | 10 | 19.5 | 18.8 | 4.5 | 10.8 | 152.5 | 112.5 | 1 | 9.78 | 4.02 | 75 | 3 | 14.9 | 153 |
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| 元素 | 最大值 | 中位数 | 平均值 | 区域
平均值* | 标准
离差 | 变化
系数 | 剔除高值、低值后 | 平均值
(背景值) | 标准离差 | 变化系数 | 计算异
常下限 | 采用的
异常下限 | | Au | 75.38 | 2.28 | 3.15 | 2.94 | 3.72 | 1.18 | 2.45 | 1.30 | 0.53 | 5.05 | 6.5 | | Ag | 10000 | 72.00 | 108.91 | 125.33 | 286.32 | 2.63 | 73.98 | 22.67 | 0.31 | 119.32 | 130 | | Cu | 400 | 37.50 | 43.87 | 41.13 | 27.38 | 0.62 | 39.28 | 16.55 | 0.42 | 72.38 | 80 | | Pb | 1000 | 32.30 | 37.57 | 33.53 | 36.47 | 0.97 | 32.85 | 10.95 | 0.33 | 54.75 | 60 | | Zn | 500 | 127.00 | 127.78 | 113.36 | 45.47 | 0.36 | 125.85 | 41.08 | 0.33 | 208.01 | 200 | | W | 33.17 | 3.57 | 3.83 | 3.35 | 1.91 | 0.50 | 3.59 | 1.37 | 0.38 | 6.33 | 7 | | Sn | 100 | 7.10 | 8.97 | 15.19 | 8.20 | 0.91 | 7.33 | 2.91 | 0.40 | 13.15 | 15 | | Mo | 23.36 | 1.06 | 1.33 | 2.51 | 1.20 | 0.90 | 1.10 | 0.51 | 0.46 | 2.12 | 3 | | Bi | 100 | 0.58 | 0.87 | 0.98 | 3.02 | 3.46 | 0.59 | 0.22 | 0.37 | 1.03 | 1.1 | | As | 500 | 15.00 | 27.09 | 17.96 | 44.17 | 1.63 | 15.72 | 8.84 | 0.56 | 33.40 | 50 | | Sb | 84.60 | 1.80 | 2.75 | 1.24 | 3.91 | 1.42 | 1.85 | 0.92 | 0.50 | 3.69 | 5 |
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| 元素 | F1 | F2 | F3 | F4 | F5 | F6 | F7 | | Pb | 0.205 | 0.882 | 0.129 | 0.037 | 0.033 | 0.052 | 0.083 | | Cu | 0.091 | -0.025 | 0.860 | 0.313 | -0.037 | 0.074 | 0.039 | | Ag | 0.143 | 0.807 | 0.066 | 0.361 | 0.056 | 0.057 | 0.030 | | Zn | -0.070 | 0.360 | 0.720 | -0.341 | 0.080 | -0.099 | 0.017 | | Mo | 0.084 | 0.073 | 0.008 | -0.003 | 0.036 | 0.983 | 0.028 | | W | 0.138 | 0.056 | 0.019 | 0.076 | 0.973 | 0.034 | 0.022 | | Au | 0.852 | -0.027 | 0.124 | -0.103 | 0.004 | -0.042 | 0.064 | | Sb | 0.632 | 0.282 | -0.142 | 0.279 | 0.252 | 0.167 | -0.008 | | As | 0.785 | 0.329 | -0.016 | 0.203 | 0.085 | 0.107 | -0.030 | | Sn | 0.029 | 0.081 | 0.039 | 0.025 | 0.021 | 0.028 | 0.993 | | Bi | 0.108 | 0.273 | 0.086 | 0.846 | 0.092 | -0.016 | 0.028 | | 特征值 | 3.181 | 1.467 | 1.036 | 0.993 | 0.917 | 0.892 | 0.801 | | 方差贡献/% | 28.921 | 13.334 | 9.42 | 9.025 | 8.333 | 8.108 | 7.282 | | 累积方差贡献/% | 28.921 | 42.255 | 51.675 | 60.700 | 69.034 | 77.141 | 84.424 |
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| 地层 | 岩性 | 标本数 | ρ/(Ω·m) | η/% | κ/10-6SI | | 最小 | 最大 | 均值 | 最小 | 最大 | 均值 | 最小 | 最大 | 均值 | | 新元古代井潭组 | 英安岩 | 10 | 1 717 | 5 894 | 3 198 | 0.92 | 2.62 | 1.56 | 95 | 1 852 | 509 | | (Pt3j) | 流纹岩 | 20 | 2 110 | 6 477 | 4 056 | 0.27 | 2.15 | 0.92 | 58 | 262 | 175 | 侏罗纪洪琴组
(J2h) | 含砾砂岩、
细粉砂岩 | 39 | 189 | 472 | 286 | 1.07 | 5.19 | 2.38 | 93 | 161 | 125 | 新元古代昌前组
(Pt3ch) | 千枚岩 | 46 | 5 348 | 38 389 | 19 719 | 1.79 | 3.9 | 3.06 | 135 | 233 | 189 | | 构造碎裂岩 | 10 | 3 744 | 18 087 | 7 169 | 0.41 | 1.53 | 0.95 | 100 | 178 | 143 | | 含矿千糜岩 | 80 | 13 | 152 | 65 | 18.8 | 32 | 25.19 | 549 | 1 733 | 785 | | 岩浆岩(燕山期) | 花岗斑岩 | 9 | 578 | 2 371 | 1 177 | 0.61 | 2.42 | 1.57 | 124 | 192 | 151 |
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