GEOLOGICAL MODEL FOR PROSPECTING PREDICTION IN "TRINITY" PROSPECTING AREA IN THE XIAOQINLING GOLD DEPOSIT IN SHANNXI AND ITS PROSPECTING SIGNIFICANCE
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摘要: 为解决制约找矿突破的关键问题，运用勘查区找矿预测理论，通过开展构造-蚀变专项填图、典型矿床解剖等工作，重点研究了小秦岭金矿田石英脉型金矿床的成矿地质体、成矿构造和成矿结构面、成矿作用的特征标志；在综合分析研究的基础上初步构建了"三位一体"找矿预测模型；并结合岩石地球化学测量成果，圈定了13处找矿靶区，其中两处找矿靶区经工程验证见到工业矿体，初步证明陕西小秦岭金矿田石英脉型金矿床"三位一体"勘查区找矿预测地质模型预测效果良好，在矿田新一轮"攻深找盲"工作中具有现实的指导意义。Abstract: To solve the key problems to prospecting breakthrough, on the basis of the theory of prospecting prediction in exploration area, by conducting works such as structural-alteration special mapping, typical deposits analysis, the ore-forming geological bodies, the metallogenic structures, the metallogenic structural surface and the characteristics of mineralization of quartz vein type gold deposits in the Xiaoqinling gold fields are studied. On the basis of comprehensive analysis and research, the "trinity" prospecting prediction model is constructed.In combination with rock geochemical survey results, 13 prospecting target areas are delineated, including two which reveal industrial orebodies verified by engineering preliminary evidence, identifying that the "trinity" prospecting prediction model has preferable performance in quartz vein type gold deposits in the Xiaoqinling gold fields and practical guiding significance in the new round of "exploring deep deposit" work.
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图 1 陕西小秦岭金矿田区域地质图
Figure 1. Regional geology map of the Xiaoqinling gold fields in Shannxi
图 2 稀土元素球粒陨石标准化分布型式图
a—文峪岩体稀土元素球粒陨石标准化分布型式图；b—华山岩体稀土元素球粒陨石标准化分布型式图 c—Q185号矿脉稀土元素球粒陨石标准化分布型式图；d—Q224号矿脉稀土元素球粒陨石标准化分布型式图
Figure 2. Normalized distribution pattern of REE chondrite
图 3 华山岩体单颗粒锆石阴极发光照片(Ma)
Figure 3. Cathodoluminescence photos of single grain zircon from the Huashan rock mass
图 4 华山岩体单颗粒锆石SHRIMP U-Pb测年
Figure 4. SHRIMP U-Pb dating of single grain zircon from the Huashan rock mass
图 5 成矿期石英脉的分支复合及多期活动特征
Figure 5. Convergence of branchings and multi-phase activity characteristics of quartz veins in metallogenic period
图 6 不同方向矿脉的成矿后断裂
Sc—片岩；q—石英 a—Q507号矿脉1430 m中段正断层对石英脉体的错断；b—Q315矿脉750 m中段左行断层对石英脉体的错断；c—Q185号矿脉950 m中段右行断层对石英脉体的错断；d—Q886号矿脉1860 m中段石英脉被后期煌斑岩脉切割
Figure 6. Post metallogenic fractures of ore veins in different directions
图 7 成矿结构面充填的物质成分
Gn—片麻岩；q—石英；Sch—构造片岩 a—Q185号矿脉955 m中段多金属矿化石英脉夹绢云绿泥石英片岩；b—Q315号矿脉650 m中段方铅矿化石英脉夹绢云绿泥石英片岩；c—Q507号矿脉943 m中段石英脉夹绿泥石石英片岩；d—Q250号矿脉1400 m中段石英脉
Figure 7. The material composition filled in metallogenic structural plane
图 8 成矿结构面的力学性质
a—Q161号矿脉结构面压扭性特征（左行逆冲）；b—Q91102号矿脉结构面张扭特征（右行正断）
Figure 8. Mechanical properties of metallogenic structural planes
图 9 Q507号矿脉1510 m中段厚大石英脉特征及其力学分析示意图
q—石英；Py—黄铁矿；Gn—片麻岩；Cp—黄铜矿走向上为压性、垂向上为张性环境形成的石英脉，厚度大于3 m
Figure 9. Characteristics of quartz thick vein at 1510 m in the middle of Q507 ore vein and its mechanical analysis
图 10 成矿结构面的运动方向
q—石英；Sc—片岩 a—右行逆冲(Q507号矿脉943中段2号矿体)；b—左行逆冲(Q185号矿脉955中段1号矿体)；c—右行逆冲(Q315号矿脉700中段)；d—右行剪切(Q250号矿脉1280中段)
Figure 10. The movement directions of the ore structure plane
图 11 矿石结构类型及多金属矿化特征
Py—黄铁矿；Cp—黄铜矿；Qu—石英脉
Figure 11. Ore structure types and polymetallic mineralization characteristics
图 12 金的赋存状态
a—黄铁矿(Py)裂隙中的自然金(Gl)与方铅矿(Gn)伴生；b—自然金(Au)在黄铁矿(Py)中；c—黄铁矿(Py)中自然金(Au)；d—黄铁矿(Py)粒间自然金(Gl)
Figure 12. Occurrence of gold
图 13 小秦岭石英脉型金矿床黄铁矿微量元素AS-Co-Ni三角形投点
Figure 13. Triangular projection points of trace elements AS-Co-Ni in pyrite from the quartz vein type gold deposits in Xiaoqinling area
图 14 小秦岭金矿床石英脉热释光曲线图
测试单位：中国地质大学(北京)成因矿物实验室 a—尖峰型(单峰)；b—宽峰型(单峰)；c—宽缓型+尖峰(双峰)；d—宽缓型+尖峰(双峰)；e—狭窄型+尖峰(双峰)；f—宽缓型+狭窄型+尖峰(三峰)；g—宽缓型+狭窄型+尖峰(三峰)；h—无峰型
Figure 14. Quartz vein thermoluminescence curves in Xiaoqinling gold deposit
图 15 Q8号矿脉蚀变分带示意图
1—内带：硅化、绢云母化、黄铁矿化；2—中带：主要为硅化、绢云母化；3—外带：主要为绿泥石化和绢云母化 4—矿体；5—石英脉；6—构造带顶底板；7—蚀变带界线
Figure 15. Schematic diagram of alteration zones of ore vein Q8
图 16 小秦岭金矿田石英脉型金矿床“三位一体”找矿预测模型
a—成矿地质体外围3~7 km范围内矿脉密集分布特征；b—成矿结构面（断裂）早阶段变形特征；c—成矿结构面（断裂）主阶段变形特征
Figure 16. The "trinity" prospecting prediction model for quartz vein type gold deposits in Xiaoqinling gold fields
图 17 工程验证揭露的矿石矿化特征
a—Q185号矿脉矿石特征；b—Q291号矿脉矿石特征
Figure 17. Mineralization characteristics of ore verified by engineering
表 1 岩体和金矿脉稀土元素分析测试结果
Table 1. Test results of rare-earth elements in rock mass and gold veins
地质体名称 样品编号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Y ΣREE LREE HREE LREE/HREE LaN/YbN δEu δCe 文峪岩体 XQC218-1 31.8 69.4 6.34 21.2 5.27 1.18 3.08 0.46 2.12 0.37 1.14 0.15 1.06 0.17 13.90 143.74 135.19 8.55 15.81 19.81 0.83 1.09 XQC218-2 47.1 82.6 7.71 25.8 5.68 1.27 3.75 0.56 2.59 0.45 1.41 0.19 1.31 0.2 26.60 180.62 170.16 10.46 16.27 23.74 0.80 0.94 XQC218-3 27.3 57.5 5.14 15.9 4.06 0.89 2.35 0.37 1.68 0.3 0.97 0.13 0.94 0.15 23.00 117.68 110.79 6.89 16.08 19.18 0.82 1.08 XQC218-4 42.9 72.5 6.62 21.5 4.91 1.1 3.04 0.47 2.08 0.36 1.14 0.15 1.08 0.17 14.60 158.02 149.53 8.49 17.61 26.23 0.82 0.92 XQC218-5 71.2 125 10.8 33.2 6.7 1.4 4.34 0.64 2.87 0.48 1.55 0.2 1.38 0.23 24.00 259.99 248.30 11.69 21.24 34.07 0.75 0.96 XQC220-1 45 79.9 6.77 20.8 4.59 1.01 2.99 0.47 2.21 0.4 1.27 0.18 1.29 0.21 17.70 167.09 158.07 9.02 17.52 23.03 0.79 0.97 XQC221-2 41.7 77 6.84 22.1 5.59 1.23 3.36 0.51 2.39 0.42 1.3 0.17 1.21 0.19 21.90 164.01 154.46 9.55 16.17 22.76 0.81 0.99 XQC221-3 29.6 65.7 5.8 18.5 4.79 1.06 2.92 0.44 2.02 0.35 1.12 0.15 1.07 0.17 24.10 133.69 125.45 8.24 15.22 18.27 0.81 1.12 XQC222-1 50 88.7 7.77 25 5.65 1.26 3.56 0.56 2.51 0.44 1.39 0.18 1.24 0.19 13.30 188.45 178.38 10.07 17.71 26.63 0.81 0.96 华山岩体 XQC226-1 11.9 22.4 2.73 12.6 2.59 0.68 1.76 0.23 0.97 0.16 0.51 0.07 0.49 0.09 13.90 57.18 52.90 4.28 12.36 16.04 0.93 0.90 XQC227-1 14.5 23.7 3.15 14.5 2.85 0.74 1.98 0.26 1.15 0.19 0.56 0.07 0.56 0.1 26.60 64.31 59.44 4.87 12.21 17.10 0.91 0.79 XQC228-1 10.7 20.1 2.32 10.3 1.97 0.48 1.32 0.17 0.75 0.12 0.4 0.05 0.41 0.07 23.00 49.16 45.87 3.29 13.94 17.23 0.87 0.91 XQC229-1 26.6 56.9 5.32 17.7 4.03 1 2.69 0.38 1.58 0.25 0.74 0.09 0.61 0.1 14.60 117.99 111.55 6.44 17.32 28.79 0.88 1.07 XQC230-1 22.5 51.7 4.91 16.7 3.95 1.01 2.89 0.4 1.62 0.26 0.78 0.1 0.72 0.12 24.00 107.66 100.77 6.89 14.63 20.63 0.88 1.11 XQC231-1 25.8 60.6 5.92 22.5 5.15 1.28 3.52 0.46 1.93 0.31 0.91 0.11 0.8 0.12 19.10 129.41 121.25 8.16 14.86 21.30 0.88 1.12 Q185号矿脉 J18 332.52 663.82 65.25 190.85 24.21 2.65 28.62 2.46 10.32 2.09 5.56 0.68 4.00 0.58 48.53 1333.61 1279.30 54.32 23.55 54.95 0.31 1.01 J19 215.95 410.91 42.17 122.99 15.18 1.77 17.61 1.53 6.24 1.25 3.54 0.46 2.64 0.39 29.55 842.62 808.97 33.65 24.04 54.03 0.33 0.96 J20 340.68 638.74 65.80 188.90 23.05 2.59 26.72 2.19 8.61 1.72 4.74 0.58 3.23 0.44 39.84 1307.98 1259.75 48.23 26.12 69.69 0.32 0.95 J21 240.87 426.95 45.19 132.39 15.67 1.89 17.64 1.42 5.21 1.01 2.90 0.38 2.11 0.31 23.56 893.93 862.96 30.97 27.86 75.52 0.35 0.91 J22 85.03 161.64 20.00 62.67 9.17 1.68 9.80 1.08 4.84 1.01 2.74 0.40 2.23 0.34 24.99 362.62 340.19 22.43 15.17 25.20 0.54 0.90 J23 111.45 225.66 30.03 104.81 17.63 3.34 19.73 2.20 11.16 2.47 6.30 0.80 4.52 0.62 59.34 540.72 492.92 47.80 10.31 16.30 0.55 0.90 J24 95.56 183.53 24.48 84.81 13.79 2.69 15.26 1.75 8.76 1.92 4.98 0.65 3.71 0.52 46.87 442.41 404.86 37.55 10.78 17.00 0.57 0.87 J26 112.00 230.00 31.60 112.00 18.40 3.82 20.80 2.36 12.20 2.70 6.79 0.86 4.69 0.64 63.00 558.85 507.82 51.03 9.95 15.77 0.60 0.90 J27 103.53 209.84 29.33 103.80 17.11 3.48 19.08 2.18 11.14 2.43 6.13 0.80 4.42 0.59 55.86 513.85 467.09 46.77 9.99 15.48 0.59 0.88 Q224号矿脉 J01 175.55 278.18 27.46 67.43 5.21 0.97 6.62 0.41 0.73 0.07 0.55 0.10 0.54 0.11 13.90 563.94 554.80 9.14 60.73 188.32 0.51 0.89 J02 147.31 249.44 25.34 65.68 5.92 1.19 7.00 0.49 1.25 0.19 0.80 0.14 0.72 0.13 26.60 505.61 494.88 10.72 46.14 118.32 0.56 0.92 J03 516.82 828.44 78.24 198.78 14.55 1.70 21.15 1.03 1.72 0.23 1.27 0.13 0.73 0.14 23.00 1664.93 1638.52 26.41 62.05 410.04 0.30 0.91 J04 176.71 282.95 29.39 80.39 9.07 2.04 11.11 0.99 3.85 0.70 1.94 0.25 1.36 0.20 14.60 600.95 580.54 20.41 28.45 75.69 0.62 0.88 J05 40.00 76.50 12.20 46.00 9.28 3.11 9.95 1.26 6.04 1.16 2.73 0.36 1.90 0.26 24.00 210.75 187.09 23.66 7.91 12.24 0.98 0.83 J06 54.00 97.30 12.70 44.00 7.76 2.68 8.28 1.00 4.61 0.88 2.14 0.30 1.56 0.22 19.10 237.43 218.44 18.99 11.51 20.12 1.02 0.88 J08 816.78 1283.93 119.57 295.07 22.63 3.47 34.92 1.66 3.30 0.50 2.12 0.18 1.04 0.19 21.90 2585.36 2541.45 43.91 57.87 458.38 0.38 0.90 J09 200.11 323.63 32.93 83.44 6.80 1.81 8.31 0.52 1.07 0.15 0.77 0.13 0.69 0.13 24.10 660.49 648.73 11.76 55.17 169.19 0.74 0.89 J10 627.34 1005.85 98.67 243.97 20.84 3.35 30.12 1.68 4.68 0.89 2.90 0.32 1.81 0.30 13.30 2042.71 2000.02 42.69 46.85 201.75 0.41 0.90 J12 125.67 196.72 20.33 52.29 4.88 1.17 5.48 0.42 1.01 0.14 0.63 0.12 0.64 0.12 12.30 409.63 401.08 8.55 46.89 113.35 0.69 0.87 J13 151.23 232.74 23.47 60.26 5.57 1.40 6.75 0.46 1.13 0.15 0.70 0.12 0.66 0.12 10.10 484.77 474.67 10.10 47.01 134.03 0.70 0.87 J17 267.00 498.00 57.60 188.00 24.90 4.51 26.20 2.14 7.72 1.36 3.55 0.42 2.38 0.36 31.7 1084.14 1040.01 44.13 23.57 65.21 0.54 0.94 注：测试单位：核工业北京地质研究院分析测试研究中心；测试方法：电感耦合等离子体原子发射光谱法；仪器型号：iCAPQ电感耦合等离子体质谱仪；球粒陨石数值引自Masuda等，1973；稀土元素单位μg/g 
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表 3 华山岩体锆石测年结果表
Table 3. Zircon dating results from the Huashan rock mass
Spot 206Pb/% U/×10-6 Th/×10-6 232Th/238U 206Pb*/×10-6 207Pb*/206Pb* ±/% 207Pb*/235U ±/% 206Pb*/238U ±/% errcorr 206Pb/238U Age Discordant/% HS01-1.1 0.13 3933 1408 0.37 79.27 0.0502 1.4 0.16 1.4 0.0234 0.4 0.250 149.3 0.5 26 HS01-2.1 0.13 1493 608 0.42 28.37 0.0499 2.2 0.15 2.2 0.0221 0.6 0.253 140.9 0.8 26 HS01-3.1 0.13 3438 771 0.23 71.49 0.0483 1.8 0.16 1.9 0.0242 0.4 0.197 154.0 0.6 -35 HS01-4.1 0.69 2212 1149 0.54 43.78 0.0462 3.4 0.15 3.4 0.0229 0.5 0.140 145.9 0.7 -1326 HS01-5.1 0.06 2672 630 0.24 53.84 0.0492 1.2 0.16 1.3 0.0234 0.4 0.300 149.3 0.6 5 HS01-6.1 -0.21 1871 1032 0.57 36.27 0.0519 2.1 0.16 2.2 0.0226 0.5 0.238 144.2 0.7 49 HS01-7.1 0.22 1092 610 0.58 20.81 0.0498 2.6 0.15 2.7 0.0221 0.6 0.218 141.1 0.8 24 HS01-8.1 0.30 1441 926 0.66 28.16 0.0475 2.0 0.15 2.0 0.0227 0.5 0.242 144.6 0.7 -88 HS01-9.1 0.16 1775 760 0.44 35.46 0.0475 2.5 0.15 2.7 0.0232 0.9 0.334 148.0 1.3 -104 HS01-10.1 0.18 831 690 0.86 16.37 0.0477 2.6 0.15 2.7 0.0229 0.7 0.247 145.9 1.0 -75 HS01-11.1 -0.13 1550 828 0.55 30.18 0.0496 1.9 0.16 2.0 0.0227 0.5 0.248 144.7 0.7 17 HS01-12.1 0.41 1274 759 0.62 25.23 0.0456 1.9 0.14 2.0 0.0230 0.5 0.267 146.3 0.8 778
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表 5 矿脉地质特征一览表
Table 5. Geological feature of ore veins
矿脉编号 出露地理位置 出露长度/m 产状变化 产状 平均产状 Q8 江水岔-善车峪 5400 170°~200°∠30°~36° 180°∠35° Q507 西闯-东墁老鸦岔一带 5000 188°~192°∠40°~52° 190°∠45° Q161 善车峪干沟 1018 112°~127°∠67°~86° 120°∠80° Q185 善车峪相马沟—杀人沟 1200 110°~140°∠57°~85° 125°∠75° Q91102 立峪-玉石峪梁 1680 255°~285°∠75°~88° 260°∠85°
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表 6 成矿期、矿化阶段及矿物生成顺序表
Table 6. Metallogenic stages, mineralization stages and sequence of mineral generation
表 7 小秦岭石英脉型金矿黄铁矿形态标型特征与金品位关系
Table 7. The relationship between the morphological characteristics of quartz vein type gold ore and pyrite ore and gold grade in the Xiaoqinling area
矿脉编号 样品编号 颜色 晶形 自形程度 粒度/mm 品位(Au×10-6) Q185号矿脉 Py001 浅黄白色 立方体{100} 自形 中-粗粒3-5 0.60 Py002 浅黄色 立方体{100} 自形 中-粗粒5-10 0.65 Py003 暗黄色 细粒它形集合体{111}+{210} 半自形-它形 细粒集合体0.5-1.5 17.45 Py004 浅黄色 立方体{100} 半自形 中细粒1-3 1.65 Py005 浅黄绿色 立方体{100}、五角十二面体{210} 半自形-它形 细粒集合体0.2-1 5.78 Py006 黄绿色 细粒它形集合体{100}+{210} 它形 细粒集合体0.2-1.5 132 Py007 黄绿色 五角十二面体{210}、八面体{111} 半自形-它形 中-细粒1-3 111 Q507号矿脉 Py013 浅黄色 立方体{100} 自形 中-粗粒3-5 1.60 Py012 浅铜黄色 立方体{100} 自形 中细粒1-3 2.45 Py011 浅黄绿色 立方体{100}、五角十二面体{210} 半自形-它形 细粒集合体0.2-1 6.84 Py010 黄绿色 细粒它形集合体{100}+{210} 半自形-它形 细粒集合体0.2-1.5 11.27
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表 8 小秦岭金矿田含金黄铁矿微量元素分析测试结果
Table 8. Test results of trace elements of gold bearing pyrite in Xiaoqinling gold field
矿脉编号 样品编号 期次 Au/×10-9 Ag/×10-9 Co/×10-9 Ni/×10-9 As/×10-9 Se/×10-9 Te/×10-9 Cu/×10-9 Pb/10-9 Zn/×10-9 Co/Ni Au/Ag Q507
②号矿体py018 Ⅲ 114 26.1 71.3 43.4 19.4 3.87 7 447 6469 56.2 1.64 4.37 py017 Ⅱ 7.68 2.26 281 81.5 15.8 0.96 3.22 36.1 220 45.1 3.45 3.40 py016 Ⅲ 12.6 8.68 420 261 20 1.59 4.16 81.7 946 48.4 1.61 1.45 py014 Ⅰ 31.6 28.6 393 88.4 14.6 2.32 23.6 248 754 68.5 4.45 1.10 py019 Ⅰ 3.52 1.89 363 98.8 21.6 1.33 5.5 17.6 225 46.3 3.67 1.86 py020 Ⅱ 58.4 4.92 217 73.1 13.1 1.38 6.65 54.1 318 49.4 2.97 11.87 py021 Ⅰ 3.77 34.3 342 65.8 26.5 3.09 27.1 10.3 2072 47.9 5.20 0.11 Q507
③号矿体py013 Ⅱ 11.6 50.7 139 76 24.6 4.67 13.5 1112 8460 74.9 1.83 0.23 py012 Ⅱ 421 160 198 199 16.4 1.02 6.14 907 1059 74.5 0.99 2.63 py011 Ⅱ 236 36.7 137 186 16.8 1.72 15.9 126 1671 59 0.74 6.43 py010 Ⅱ 23.1 6.87 145 77.4 23.9 1.69 14.1 339 202 56 1.87 3.36 Q185
①号矿体py004 Ⅱ 1570 895 317 360 66.1 5.26 0.54 7991 18692 406 0.88 1.75 py050 Ⅲ 308 84.7 63.4 30.5 83.6 12.1 0.72 1375 20557 87.7 2.08 3.64 py051 Ⅳ 70.8 28.9 168 79 135 0.19 1.18 4086 1419 64.3 2.13 2.45 py005 Ⅱ 1303 384 132 161 68.7 7.61 0.76 1311 14765 279 0.82 3.39 py006 Ⅱ 33.8 40.3 613 912 89.9 3.73 0.59 3985 9721 109 0.67 0.84 Q185
②号矿体py002 Ⅱ 33.6 28.2 423 419 145 9.23 0.6 1139 14751 1638 1.01 1.19 py007 Ⅱ 1586 500 469 67.6 57.5 2.32 0.86 3985 7514 312 6.94 3.17 Q505 py022 Ⅱ 21.4 2.19 204 85.3 13.5 5.47 16.2 27.7 54.7 46 2.39 9.77 py023 Ⅱ 4.38 1.31 79.2 18.3 3.79 2.3 7.87 15.2 97.9 43.1 4.33 3.34 py024 Ⅱ 2.62 2.29 178 56.1 9.06 6.81 10.7 26.7 146 49.6 3.17 1.14 Q315 py027 Ⅲ 158 96.6 415 339 28.7 8.36 0.81 2417 17340 4036 1.22 1.64 py026 Ⅰ 6.79 33.5 69.5 224 27.5 9.01 1.24 2722 18035 491 0.31 0.20 Q224 py029 Ⅱ 1479 142 930 309 61.5 2.31 0.61 102 4666 1377 3.01 10.42 py030 Ⅲ 1848 149 886 572 69.4 7.3 0.36 3122 17947 3024 1.55 12.40 py033 Ⅳ 221 40 934 227 51.1 2.96 7.37 320 1847 70.9 4.11 5.53 Q2008 py032 Ⅲ 27.8 25.1 213 183 4.46 3.43 11.2 459 6382 50.7 1.16 1.11 Q3184 py036 Ⅲ 1210 364 177 130 326 4.43 0.58 7416 17921 186 1.36 3.32 Q291 py038 Ⅱ 798 16.9 222 142 4.91 1.3 4.05 1012 48.5 51.6 1.56 47.22 py039 Ⅱ 16.3 2.85 265 544 14.6 6.73 13.6 86 823 50.3 0.49 5.72 py040 Ⅱ 138 4.42 135 66.7 18.6 2.36 20.4 75.3 132 50.4 2.02 31.22 py042 Ⅰ 0.32 4.88 94.3 132 21.6 1.63 6.96 3668 26.2 46.7 0.71 0.07 Q91102 py041 Ⅰ 18.8 2.34 698 281 25.4 6.44 6.7 1090 47.1 52.6 2.48 8.03 Q240 py043 Ⅳ 0.1 0.5 396 69.7 22.4 0.63 1.23 7.59 50.5 55.5 5.68 0.20 py044 Ⅰ 1.84 0.45 298 55.3 23.6 3.09 1.48 5.99 158 49.4 5.39 4.09 py045 Ⅱ 1.13 0.35 415 52.5 19 4.57 2.81 6 50.4 47.6 7.90 3.23 Q8 py046 Ⅱ 14.4 6.52 276 551 62.5 4.35 6.18 1071 543 75.6 0.50 2.21 py047 Ⅱ 0.17 0.92 32.8 18.6 68.3 1.27 9.23 41.4 103 45.3 1.76 0.18 py048 Ⅲ 2.91 125 119 101 12.8 42.2 21.2 106 63710 300 1.18 0.02 py049 Ⅰ 0.29 2.12 837 254 5.9 14.8 3.21 925 213 55.3 3.30 0.14 Q935 py028 Ⅲ 79.7 59 330 557 238 3.2 2.99 2970 1850 71.3 0.59 1.35 Q886 PY025 Ⅱ 0.33 0.69 6.1 7.28 51.5 1.19 8.41 7.66 51.1 43.1 0.84 0.48 XQC041-3 Ⅱ 66 17.8 569 253 38.3 5.37 155 55.8 107 62.1 2.25 3.71 Q102 PY031 Ⅲ 41.8 14 151 112 22.9 4.6 6.38 240 8149 483 1.35 2.99 Q89104 PD900-2/1 Ⅱ 60.7 10 410 121 28.4 3.36 12.5 4023 25.2 63.2 3.39 6.07 PD900-2/4 Ⅱ 60 2.92 266 55.6 13.6 5.86 16.8 62.5 79.1 56.8 4.78 20.55 PD900-2/5 Ⅱ 18.4 1.93 205 78.6 27.6 5.19 56.1 23.6 35.1 55 2.61 9.53 Q154 YD890-12 Ⅱ 138 11.7 202 202 26.2 1.48 8.01 3342 176 54.4 1.00 11.79 YD890-13 Ⅱ 110 3.58 62.9 58.7 34.6 11.5 85.3 81.2 91.2 52.1 1.07 30.73 Q173 XQC031-5/1 Ⅱ 23.2 10.7 3294 757 79 0.93 1.78 349 985 416 4.35 2.17 XQC031-5/2 Ⅱ 20.3 5.48 995 1334 58.8 2.05 4.37 166 160 247 0.75 3.70 XQC031-5/4 Ⅱ 20.4 8.32 855 569 42.5 1.8 1.58 207 1126 187 1.50 2.45 Q61 XQC036-2 Ⅱ 49.3 25.5 417 560 33.5 0.81 28.3 147 748 173 0.74 1.93 XQC036-3 Ⅱ 7.4 7.84 239 184 73.6 3.01 13.2 61.2 157 78.1 1.30 0.94 XQC036-5 Ⅱ 473 108 277 131 71.4 14 2676 237 2008 80.6 2.11 4.38 Q240 XQC042-1 Ⅱ 37.8 5.79 385 213 41.4 3.29 1.24 288 55.5 72.9 1.81 6.53 XQC042-5 Ⅱ 302 71.4 435 174 55.6 1.96 <0.01 2461 65.4 56.6 2.50 4.23 Q881 XQC043-1 Ⅱ 12.4 24.9 146 246 14 2.55 21.7 1645 4529 59.4 0.59 0.50 XQC043-5 Ⅱ 0.24 4.26 169 85.9 12 8.03 59.2 76.1 203 50.5 1.97 0.06 Q8 XQC045-1 Ⅱ 18.1 1.57 523 281 89.3 1.19 6.43 41 227 50.8 1.86 11.53 XQC045-2/1 Ⅱ 1627 51.8 603 9.93 54.1 1.72 1.15 347 957 81.5 60.73 31.41 XQC045-2/5 Ⅱ 420 52.6 566 58.3 68.5 3.27 3.48 365 1387 78.1 9.71 7.98 无名脉 YD890-4 Ⅱ 123 6.32 58.5 47.2 32.3 1.31 8.6 1034 172 52.4 1.24 19.46 无名脉 YD890-9 Ⅱ 60.1 3.87 289 343 41 5.13 13.4 306 30.7 53.4 0.84 15.53 Q91102 XQC013-2 Ⅰ 0.08 0.27 4134 540 50.9 14.2 0.61 90.5 85.8 49.7 7.66 0.30 测试单位：国家地质实验测试中心，测试方法：样品为-200目、HCl(1+1)溶解定容、等离子质朴仪PE300D
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表 9 小秦岭石英脉型金矿床“三位一体”找矿预测模型要素表
Table 9. Elements of "trinity" prospecting prediction model for quartz vein type gold deposits in Xiaoqinling area
成矿地质体 燕山期的文峪、华山花岗岩体(岩体外围3~7 km范围内是成矿富集地段) 成矿结构面 成矿结构面主要是断裂构造：
1、有四组不同方向的含矿断裂，其中以东西向和北东向含矿相对较好；构造带规模大者、含矿相对较好；
2、结构面充填的物质成分主要是绿泥石石英片岩+石英脉，含脉率高者，含矿相对较好；
3、结构面的力学性质多为压扭性、少部分为张扭性；
4、侧伏规律：东西向组向西侧伏(Q8、Q507)、北东向向南东陡倾向组北东侧伏(Q185、Q240)、北东向组向北西缓倾向组向南西侧伏(Q505、Q401)、南北向组略像北侧伏(Q291、Q298、Q292、Q294、Q315)、北西向组向北西侧伏(Q250、Q224)。成矿作用的特征标志 宏观标志：
1、矿化标志—多金属矿化组合好者，含金性较好；细粒它形粒状黄铁矿集何体，含金性较好；
2、蚀变标志—黄铁矿化、硅化、绢云母化蚀变组合，蚀变强者含金性较好。
微观标志：
1、群体包裹体标志—群体包裹体中SO42-、Cl-、CO2含量与金正相关；
2、黄铁矿标型-黄铁矿导型为P型或N-P混合型者，含金性较好；
3、石英脉热释光—石英脉热释光曲线为多峰型或双峰型，其含金性相对较好。
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表 10 小秦岭金矿田深部找矿靶区一览表
Table 10. A list of target areas for deep prospecting in Xiaoqinling gold fields
序号 靶区名称 编号 三位一体预测模型预测标志 构造叠加晕法预测标志 综合圈定靶区数 1 Q8号脉西段-200 m标高以下 A1 侧伏+矿化蚀变 前尾晕共存 1 2 Q173号脉1090~830 m标高以下 A2 侧伏+矿化蚀变 前尾晕共存 1 3 Q195号脉1050~850 m标高以下 A3 侧伏+矿化蚀变 前尾晕共存 1 4 Q507号脉943~650 m标高以下 A4 侧伏+矿化蚀变+微观样品 前尾晕共存+地球化学参数转折 2 5 Q185号脉450 m标高以下 A5 侧伏+矿化蚀变+微观样品 前尾晕共存+地球化学参数转折 2(已验证) 6 Q240号脉1160~850 m标高以下 A6 侧伏+矿化蚀变 前强尾弱+前尾晕共存+地球化学参数转折 3 7 Q505号脉1330~1230 m标高以下 A7 侧伏+矿化蚀变 前尾晕共存+地球化学参数转折 1 8 Q886号脉1660~1440 m标高以下 A8 侧伏+矿化蚀变 深部前缘晕增强 1 9 Q291号矿脉-200 m标高以下 A9 侧伏+矿化蚀变 前尾晕共存 1(已验证)
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