Preliminary analysis of the geochemical prospecting indicators of Linglong type gold deposit rock and ore body in Jiaodong
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摘要:
胶东玲珑金矿田经过长时间的探索找矿工作，形成了由地表出露的次级断裂中的石英脉型金矿、主级断裂中隐伏的蚀变岩型金矿及深部的含矿致矿岩体构成的“三位一体”玲珑型金矿找矿模型, 研究该类金矿特征, 厘定出简易高效的岩体与矿体(以下简称岩矿体)地球化学找矿标志，对预测识别深部含矿致矿岩矿体的存在及隐伏位置具有非常重要的意义。通过分析玲珑地区浅部金矿体、深部含矿致矿岩体、距离矿区较近和较远的中酸性岩体的地球化学特征，发现玲珑型金矿为与受俯冲洋壳物质混染的壳幔岩浆活动有关的金矿，烧失量、稀土元素配分模式、δEu值、Nb/Ta值、Ti/V值、Te-Au关系及SiO2-P2O5关系等能够反映岩矿体成因的地球化学特征，可以作为玲珑型金矿岩矿体的地球化学找矿标志。根据该方法对焦家金矿、三山岛金矿、辽东五龙金矿等成矿类似区进行了初步的找矿方向预测，为后续勘查工作提供了依据。研究可为玲珑型金矿的研究及深部隐伏区的找矿预测工作提供参考。
Abstract:After a long period of exploration and prospecting work, Linglong gold deposit in Jiaodong has formed a three-in-one Linglong type gold deposit prospecting model, consisting of quartz vein type gold deposits in secondary faults exposed on the surface, altered rock type gold deposits hidden in main faults, and deep ore bearing ore bodies. Studying the characteristics of gold deposit of this type and determining simple and efficient geochemical prospecting indicators for rock and ore bodies are of great significance for predicting and identifying the existence and hidden positions of deep mineralization-related ore-forming rock mass. By analyzing the geochemical characteristics of shallow gold deposits, deep ore bearing rock bodies, and intermediate acidic rock bodies located close to and far from the mining area in Linglong region, the authors found that Linglong type gold deposit is related to crustal mantle magmatic activity mixed with subducting oceanic crust materials. The geochemical characteristics, which can reflect the genesis of the rock body and ore, including loss on ignition, rare earth element distribution patterns, δEu values, Nb/Ta values, Ti/V values, Te Au relationships, and SiO2-P2O5 relationships, can be used as indicators for the geochemical exploration of Linglong type gold deposit. Based on this method, preliminary prospecting directions were predicted for similar mineralization areas such as Jiaojia gold mine, Sanshan Island gold mine, and Liaodong Wulong gold mine, providing basis for subsequent exploration work. This study could provide references for research on Linglong type gold deposits and the exploration and prediction in deep-seated hidden areas.
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Key words:
- Jiaodong /
- Linglong type gold mines /
- rock and ore body /
- geochemistry /
- prospecting indicators
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表 1 样品主量和微量元素分析结果
Table 1. Analysis results of main and trace elements in the samples
样号 主量元素含量/% 微量元素含量/10-6 SiO2 Al2O3 Fe2O3 K2O TiO2 P2O5 CaO MgO Na2O MnO FeO LOI S V ZK1-1 55.22 17.65 2.75 2.79 0.81 0.43 5.96 2.38 3.76 0.086 3.31 4.00 0.450 99.30 ZK1-2 55.04 17.09 1.53 3.01 0.80 0.42 5.93 2.59 3.32 0.082 4.76 4.91 1.440 107.00 ZK1-3 55.16 17.61 3.00 2.87 0.78 0.41 5.97 2.41 3.59 0.081 2.96 4.83 0.980 87.40 ZK2-1 51.58 17.98 2.08 3.03 1.02 0.45 4.92 3.33 3.06 0.081 5.09 6.81 0.890 166.00 ZK2-2 60.42 17.05 1.99 3.91 0.36 0.26 3.94 1.24 3.90 0.051 1.82 5.17 1.040 37.40 ZJ-1 65.76 15.45 1.27 4.32 0.43 0.29 3.39 1.83 4.02 0.065 1.47 1.80 0.024 46.60 ZJ-2 65.84 15.38 1.28 4.37 0.43 0.29 3.30 1.88 4.04 0.073 1.54 1.47 0.004 46.90 YJ-1 70.26 14.88 0.85 4.37 0.27 0.13 2.12 0.93 4.11 0.053 0.96 1.00 0.008 25.60 SY1 92.88 1.28 1.22 0.38 0.06 0.08 0.92 0.40 0.25 0.082 0.72 1.26 0.600 5.43 SY2 80.72 3.21 5.77 1.03 0.04 0.02 0.44 0.39 0.29 0.114 3.13 4.42 4.550 3.25 SB1 71.50 11.47 5.27 4.36 0.13 0.04 0.56 0.39 0.58 0.040 0.57 3.87 3.840 19.98 SB2 74.36 4.81 11.46 1.88 0.08 0.02 0.22 0.27 0.29 0.041 0.63 6.20 8.60 4.93 样号 微量元素含量/10-6 Zr Nb Ta W Ce Pr Nd Tm Yb Lu Hf Bi Th Sm ZK1-1 69.1 7.16 0.61 2.21 136.0 15.2 51.20 0.28 1.76 0.28 2.07 0.14 9.38 7.62 ZK1-2 65.8 7.50 0.51 3.84 117.0 13.4 45.70 0.24 1.59 0.26 2.29 0.40 8.53 7.24 ZK1-3 60.3 7.35 0.52 1.96 111.0 12.6 43.50 0.23 1.49 0.24 2.00 0.20 8.28 6.70 ZK2-1 48.7 6.59 0.44 7.46 78.2 9.77 36.40 0.20 1.30 0.20 1.55 0.50 4.32 6.14 ZK2-2 92.4 6.09 0.41 5.62 131.0 14.1 44.90 0.17 1.15 0.20 2.68 0.64 11.70 6.08 ZJ-1 15.3 7.13 0.43 0.20 244.0 26.9 92.80 0.16 1.04 0.16 0.67 0.09 18.70 14.20 ZJ-2 13.6 7.14 0.43 0.18 242.0 26.8 92.00 0.16 0.94 0.16 0.70 0.08 18.90 13.90 YJ-1 14.6 5.89 0.37 0.14 106.0 12.0 40.00 0.08 0.54 0.10 0.79 0.11 14.80 6.27 SY1 13.5 1.38 0.09 0.78 7.9 0.90 3.32 0.03 0.03 0.03 0.46 0.75 0.62 0.57 SY2 15.7 2.55 0.23 0.28 9.4 1.08 3.90 0.02 0.02 0.02 0.76 0.57 0.97 0.66 SB1 46.4 4.15 0.26 2.79 32.6 3.91 13.45 0.03 0.03 0.03 1.76 2.62 2.42 1.90 SB2 22.7 2.87 0.17 0.41 14.1 1.53 5.24 0.02 0.02 0.02 0.90 0.87 2.93 0.73 样号 微量元素含量/10-6 Au含量/10-9 Eu Gd Tb Dy Ho Er La Te Y Ni Cu Cr δEu ZK1-1 2.46 6.58 0.79 3.79 0.71 2.16 74.4 0.21 18.10 4.32 28.60 11.40 1.04 66.10 ZK1-2 2.36 6.20 0.76 3.75 0.69 2.05 62.9 0.32 17.10 5.77 16.50 9.45 1.05 94.00 ZK1-3 2.29 5.77 0.69 3.38 0.64 1.88 59.1 0.26 16.30 4.99 33.90 10.60 1.10 56.70 ZK2-1 1.71 5.00 0.63 3.05 0.56 1.71 38.0 0.25 13.20 12.30 29.50 12.50 0.91 15.40 ZK2-2 2.09 5.26 0.56 2.63 0.45 1.37 74.4 0.31 12.00 3.67 13.90 9.75 1.10 10.00 ZJ-1 4.00 10.30 1.03 3.69 0.56 1.52 134.0 0.12 15.00 33.00 4.17 38.50 0.96 3.40 ZJ-2 3.94 10.40 1.00 3.52 0.56 1.55 135.0 0.16 14.40 36.20 4.28 44.30 0.96 0.50 YJ-1 1.90 4.75 0.47 1.70 0.28 0.76 59.6 0.10 7.18 19.30 4.44 30.70 1.02 0.50 SY1 0.47 0.56 0.07 0.35 0.06 0.20 4.6 1.16 1.84 7.70 23.10 19.30 2.52 0.80 SY2 0.23 0.61 0.07 0.29 0.05 0.16 5.5 0.21 1.33 11.20 403.90 11.30 1.08 0.83 SB1 0.46 1.76 0.17 0.59 0.09 0.32 15.4 2.12 2.46 7.50 158.60 10.30 0.75 12.98 SB2 0.28 0.74 0.07 0.28 0.05 0.16 8.6 0.74 1.35 12.60 14.10 13.50 1.15 4.18 
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