Geological characteristics, zircon U-Pb age and its records for tectonomagmatic events of lamprophyres in Xilaokou gold deposit, northeast margin of Jiaolai Basin
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摘要:
西涝口金矿是胶莱盆地东北缘成矿区近年在深部勘查找矿工作中取得突破性进展的大型金矿床，金矿体主要赋存于古元古代牧牛山二长花岗岩与中生代鹊山糜棱岩化花岗岩之间的构造破碎带中。区内煌斑脉岩广泛分布并与金矿存在密切的时空关系。为探究其形成时代及成因机制，进行了岩相学、岩石地球化学和锆石U-Pb年龄研究。地球化学结果显示，煌斑岩具有富碱、高钾、低钛、富集大离子亲石元素和轻稀土元素，相对亏损高场强元素和重稀土元素的特征，Nb/Ta及Zr/Hf值与原始地幔十分接近，且远高于大陆地壳值，证明煌斑岩岩浆源区以幔源为主，受地壳混染作用不强烈。锆石U-Pb年龄显示，成矿期脉岩形成时间为118.6±1.5 Ma，成矿前脉岩形成时间为157±4~150.2±2.8 Ma，除以上年轻锆石外，其余为捕获老锆石，老锆石的同位素年龄分别记录了新太古代、古元古代、新元古代及三叠纪的岩浆事件和变质时间，与区内古元古代岩浆侵入、中元古代地壳伸展与变质、三叠纪板块碰撞等事件记录吻合。经钻孔取样分析发现，西涝口金矿煌斑岩脉虽与金矿脉共用同一构造通道，且Au含量普遍不高，但其“褪色”作用为金矿形成提供了部分成矿物质。已有研究证实，煌斑岩原始岩浆含金量低，携金能力差，但其在成矿作用过程中仍起到了重要的“化学屏障”的作用。
Abstract:Xilaokou gold deposit is a large-scale gold deposit in the northeast margin of Jiaolai Basin, which has made breakthrough in deep prospecting in recent years.The gold orebodies mainly occured in the structural fracture zone between the Paleoproterozoic Muniushan monzogranite and the Mesozoic Queshan mylonitized granite.Lamprophyres in the area are closely related to gold deposits in time and space.In order to explore the formation age and genetic mechanism, we carried out petrography, geochemistry and zircon U-Pb age research.The geochemical results show that lamprophyres are enriched in alkali, potassium, large ion lithophile elements and light rare earth elements, but depleted in titanium, high field strength elements and heavy rare earth elements.The Nb/Ta and Zr/Hf ratios are far higher than the value of continental crust, and close with the primitive mantle, which proves that the magma source is mainly mantle and is not strongly contaminated by the crust. Zircon U-Pb chronology shows that the formation age of intramineral dykes is 118.6±1.5 Ma, and the formation age of premineral dykes is 157±4~150.2±2.8 Ma. Except for the above young zircons, the rest are captured old zircons.The isotopic age of old zircons recorded the magmatic and metamorphic events of Neoarchean, Paleoproterozoic, Neoproterozoic and Triassic, which is consistent with the records of Paleoproterozoic magmatic intrusion, Mesoproterozoic crustal extension and metamorphism and Triassic plate collision events. The results of drills sampling show that the lamprophyres and the gold veins share the same structural channel. Although the gold content is generally not high, its "fading" effect really provides some ore-forming materials.It has been confirmed that the lamprophyre original magma has low gold content and poor gold carrying capacity, but it still plays an important role of "chemical barrier" in the process of mineralization.
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Key words:
- northeast margin of Jiaolai Basin /
- Xilaokou gold deposit /
- lamprophyres /
- geochemical /
- zircon U-Pb age
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表 1 煌斑岩主量、微量和稀土元素分析结果
Table 1. Major, trace elements and REE analysis result of lamprophyre samples
样品编号 20XLK-1(1) 20XLK-1(2) 20XLK-2(1) 20XLK-2(2) 20XLK-3(1) 20XLK-3(2) 20XLK-23 TFe2O3 8.64 8.89 9.02 7.65 7.56 8.73 8.85 K2O 3.44 4.07 3.69 4.24 2.34 1.04 4.19 MgO 8.57 8.72 8.54 8.34 7.39 10.33 8.70 Na2O 2.60 2.81 2.06 1.90 3.58 0.18 0.29 Al2O3 15.86 16.28 15.61 15.96 16.34 11.10 13.39 CaO 8.07 9.08 8.20 14.41 7.28 15.22 15.35 SiO2 51.13 48.43 51.27 45.85 53.95 52.19 47.66 MnO 0.13 0.14 0.13 0.16 0.12 0.19 0.37 P2O5 0.60 0.58 0.55 0.48 0.47 0.36 0.31 TiO2 0.97 0.98 0.93 1.01 0.97 0.65 0.89 烧失量 8.92 16.44 12.32 18.86 9.68 14.92 19.83 Na2O+K2O 6.03 6.88 5.75 6.14 5.92 1.22 4.48 Mg# 66 66 65 68 66 70 66 La 68.3 65.5 66.4 64.4 63.8 75.2 40.7 Ce 133 130 130 129 120 143 78.4 Pr 14.7 14.2 14.2 14.3 12.9 15.5 8.72 Nd 55.6 54.1 54.7 54.8 48 58.3 32.6 Sm 8.85 8.68 8.79 9.28 7.61 8.83 5.49 Eu 3.17 2.5 2.78 2.99 2.53 4.3 1.94 Gd 7.87 7.59 7.79 8.13 6.91 8.17 5.07 Tb 0.96 0.97 0.96 1.03 0.92 0.87 0.69 Dy 4.27 4.27 4.21 4.65 4.16 3.52 3.31 Ho 0.79 0.79 0.78 0.85 0.8 0.64 0.63 Er 2.18 2.13 2.14 2.34 2.16 1.74 1.71 Tm 0.3 0.29 0.29 0.31 0.31 0.23 0.24 Yb 2.01 1.92 1.92 2.11 2.01 1.52 1.59 Lu 0.29 0.28 0.28 0.3 0.29 0.21 0.22 Rb 80.9 146 127 144 80.1 39.4 137 Ba 2855 613 1420 2121 1251 6636 1382 Th 8.01 7.53 7.76 7.66 8.98 11.1 5.06 U 1.39 1.81 1.36 3.58 1.62 1.82 0.97 Nb 9.69 11.6 8.56 29.5 9.79 5.37 7.00 Ta 0.70 0.64 0.62 0.76 0.66 0.60 0.56 Pb 23.4 14.4 12.1 18.1 5.04 2.65 12.7 Sr 1146 1588 1256 2216 1083 906 902 Zr 156 148 146 139 159 93.2 105 Ti 5032 4393 4421 4352 5091 2990 4367 Y 20.3 19.4 19.8 20.2 20.0 16.6 17.2 ΣREE 302.29 293.22 295.24 294.49 272.4 322.03 181.31 LREE 283.62 274.98 276.87 274.77 254.84 305.13 167.85 HREE 18.67 18.24 18.37 19.72 17.56 16.9 13.46 LREE/HREE 15.19 15.08 15.07 13.93 14.51 18.06 12.47 δEu 1.14 0.92 1.01 1.03 1.05 1.52 1.11 δCe 0.97 0.98 0.97 0.98 0.95 0.96 0.96 (La/Yb)N 22.91 23 23.32 20.58 21.4 33.35 17.26 (La/Sm)N 4.85 4.75 4.75 4.37 5.27 5.36 4.66 (Gd/Yb)N 3.16 3.19 3.27 3.11 2.77 4.34 2.57 Nb/Ta 14 18 14 39 15 9 13 注：Mg# =[100Mg/(Mg+TFe)]; A/NK=[Al2O3/(Na2O+K2O)](mol); A/CNK=[Al2O3/(CaO+Na2O+K2O)](mol); 主量元素含量单位为%，微量和稀土元素含量单位为10-6 
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表 2 煌斑岩锆石U-Th-Pb分析结果
Table 2. Zircon U-Th-Pb analysis result of lamprophyre samples
测试点编号 含量/10-6 同位素比值 同位素年龄/Ma Th U 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 20XLK-1(1)-002 1 53 0.0589 0.0079 0.3103 0.0373 0.0393 0.0014 565 296 274 29 249 9 20XLK-1(1)-003 176 154 0.0960 0.0040 2.7932 0.0713 0.2089 0.0036 1548 50 1354 19 1223 19 20XLK-1(1)-005 72 926 0.0495 0.0011 0.2251 0.0047 0.0328 0.0003 169 52 206 4 208 2 20XLK-1(1)-006 334 430 0.1305 0.0021 6.4214 0.1005 0.3533 0.0033 2105 28 2035 14 1950 16 20XLK-1(1)-007 34 373 0.1031 0.0020 3.1798 0.0614 0.2214 0.0024 1680 29 1452 15 1289 13 20XLK-1(1)-008 303 371 0.1069 0.0020 3.8019 0.0693 0.2553 0.0028 1748 31 1593 15 1466 14 20XLK-1(1)-009 27 129 0.0508 0.0036 0.1694 0.0109 0.0247 0.0006 232 165 159 9 157 4 20XLK-1(1)-010 19 236 0.1059 0.0023 3.0970 0.0638 0.2110 0.0031 1731 35 1432 16 1234 16 20XLK-1(1)-011 396 448 0.1315 0.0020 6.4448 0.1004 0.3519 0.0032 2118 23 2038 14 1944 15 20XLK-1(1)-012 6 1276 0.0510 0.0013 0.1981 0.0047 0.0280 0.0003 243 55 184 4 178 2 20XLK-1(1)-013 92 274 0.0743 0.0015 1.5747 0.0305 0.1526 0.0015 1050 45 960 12 915 9 20XLK-1(1)-014 246 500 0.1132 0.0017 4.5991 0.0720 0.2922 0.0028 1851 27 1749 13 1652 14 20XLK-1(1)-015 69 129 0.0780 0.0019 2.0287 0.0489 0.1881 0.0022 1146 49 1125 16 1111 12 20XLK-1(1)-016 65 1670 0.1138 0.0016 4.2008 0.0621 0.2658 0.0026 1861 26 1674 12 1519 13 20XLK-1(1)-016-1 308 435 0.1316 0.0024 6.0807 0.1042 0.3311 0.0033 2120 31 1987 15 1844 16 20XLK-1(1)-017 225 298 0.1334 0.0022 7.0099 0.1115 0.3790 0.0038 2144 28 2113 14 2072 18 20XLK-1(1)-018 151 985 0.1127 0.0016 4.8705 0.0765 0.3110 0.0030 1844 26 1797 13 1745 15 20XLK-1(1)-019 91 313 0.1079 0.0020 3.8223 0.0823 0.2555 0.0039 1765 33 1597 17 1467 20 20XLK-1(1)-020 813 620 0.0532 0.0018 0.2813 0.0090 0.0384 0.0005 345 76 252 7 243 3 20XLK-3-001 216 745 0.0492 0.0018 0.2023 0.0066 0.0300 0.0004 167 81 187 6 191 3 20XLK-3-003 484 770 0.0637 0.0013 1.0804 0.0222 0.1222 0.0013 733 44 744 11 743 8 20XLK-3-005 150 344 0.0642 0.0020 1.0641 0.0284 0.1167 0.0013 750 65 736 14 712 8 20XLK-3-006 111 181 0.0971 0.0024 3.6120 0.0927 0.2679 0.0036 1569 45 1552 20 1530 19 20XLK-3-007 276 654 0.0494 0.0022 0.1657 0.0069 0.0236 0.0004 165 138 156 6 151 2 20XLK-3-008 253 526 0.1395 0.0034 6.7552 0.1952 0.3498 0.0080 2221 38 2080 26 1934 38 20XLK-3-009 169 351 0.0836 0.0024 2.1365 0.0624 0.1848 0.0026 1284 56 1161 20 1093 14 20XLK-3-010 246 501 0.0485 0.0021 0.1826 0.0079 0.0273 0.0005 124 100 170 7 173 3 20XLK-3-011 191 314 0.1524 0.0035 8.7701 0.2005 0.4153 0.0050 2373 34 2314 21 2239 23 20XLK-3-013 295 1123 0.0515 0.0014 0.1675 0.0045 0.0235 0.0003 265 65 157 4 150 2 20XLK-3-014 114 139 0.0693 0.0018 1.2098 0.0338 0.1267 0.0019 906 56 805 16 769 11 20XLK-3-015 360 462 0.0765 0.0015 2.0016 0.0414 0.1886 0.0021 1109 39 1116 14 1114 12 20XLK-3-017 395 550 0.0632 0.0024 1.0940 0.0272 0.1245 0.0015 717 80 750 13 756 8 20XLK-3-018 324 494 0.0571 0.0016 0.5610 0.0150 0.0712 0.0008 494 68 452 10 443 5 20XLK-3-019 125 476 0.0762 0.0069 1.6875 0.0405 0.1571 0.0022 1102 181 1004 15 941 12 20XLK-3-019-1 291 1063 0.1096 0.0020 3.7403 0.0751 0.2445 0.0036 1792 32 1580 16 1410 19 20XLK-3-020 261 1858 0.0509 0.0012 0.2203 0.0053 0.0312 0.0004 235 56 202 4 198 2 20XLK-3-021-1 801 1453 0.0628 0.0014 0.6179 0.0179 0.0703 0.0014 702 48 489 11 438 8 20XLK-3-022-1 49 760 0.0487 0.0014 0.2513 0.0074 0.0371 0.0005 132 69 228 6 235 3 20XLK-3-022-2 219 459 0.0611 0.0026 0.6069 0.0177 0.0716 0.0010 643 91 482 11 446 6 20XLK-3-021-2 152 1163 0.1099 0.0024 4.3714 0.0852 0.2787 0.0037 1798 36 1707 16 1585 19 20XLK-23-001 136 193 0.0461 0.0030 0.1961 0.0114 0.0315 0.0007 400 -246 182 10 200 4 20XLK-23-002 157 187 0.0558 0.0036 0.1437 0.0086 0.0195 0.0005 456 142 136 8 124 3 20XLK-23-004 84 97 0.0545 0.0052 0.1861 0.0157 0.0257 0.0008 391 212 173 13 164 5 20XLK-23-005 618 927 0.1251 0.0020 6.6042 0.1081 0.3809 0.0035 2031 28 2060 15 2081 16 20XLK-23-005-1 610 1068 0.1267 0.0028 6.7050 0.1251 0.3716 0.0042 2054 39 2073 17 2037 20 20XLK-23-006 168 234 0.0491 0.0036 0.1216 0.0076 0.0186 0.0004 150 167 116 7 119 2 20XLK-23-007 562 375 0.0498 0.0030 0.1177 0.0067 0.0176 0.0004 187 141 113 6 112 3 20XLK-23-008 474 356 0.0605 0.0063 0.1601 0.0123 0.0217 0.0007 387 102 131 6 118 2 20XLK-23-009 207 222 0.0543 0.0025 0.1374 0.0063 0.0185 0.0004 132 178 115 7 119 2 20XLK-23-010 214 257 0.0488 0.0027 0.2185 0.0107 0.0334 0.0006 254 131 120 6 115 2 20XLK-23-011 3078 1474 0.0487 0.0039 0.1196 0.0081 0.0186 0.0004 198 69 124 3 120 2 20XLK-23-012 658 264 0.1089 0.0021 4.7748 0.0917 0.3165 0.0037 error 113 7 120 3 20XLK-23-013 154 217 0.0513 0.0030 0.1251 0.0066 0.0180 0.0003 350 150 129 8 117 2 20XLK-23-014 54 93 0.0492 0.0042 0.1273 0.0094 0.0195 0.0005 620 221 151 11 138 4 20XLK-23-015 29 184 0.1552 0.0035 8.5128 0.1875 0.3964 0.0051 139 128 201 9 212 4 20XLK-23-016 295 208 0.0501 0.0015 0.1296 0.0037 0.0187 0.0003 1783 35 1780 16 1773 18 20XLK-23-017 120 141 0.0453 0.0038 0.1177 0.0079 0.0189 0.0004 167 176 122 8 124 3 20XLK-23-018 62 110 0.3080 0.0072 29.8554 0.6010 0.6822 0.0071 2403 39 2287 20 2152 24 20XLK-23-019 446 951 0.0535 0.0036 0.1357 0.0086 0.0184 0.0004 3511 35 3482 20 3353 27 20XLK-23-020 379 454 0.1315 0.0025 6.7585 0.1267 0.3703 0.0037 2120 33 2080 17 2031 17 20XLK-23-021-1 85 189 0.0540 0.0030 0.1655 0.0089 0.0225 0.0005 369 131 156 8 143 3 20XLK-23-021-2 598 659 0.0645 0.0021 0.7424 0.0208 0.0826 0.0010 767 73 564 12 512 6 20XLK-23-021-3 157 140 0.0611 0.0019 1.0131 0.0307 0.1196 0.0020 643 65 710 16 729 11
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表 3 煌斑岩锆石微量元素分析结果
Table 3. Trace element composition of zircons from lamprophyre samples
10-6 测试点编号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ΣREE LREE HREE δEu δCe 20XLK-1(1)-002 0.04 0.13 0.00 0.00 0.05 0.03 0.24 0.24 4.98 2.65 16.43 4.77 58.12 13.76 101.4 0.2 101.2 0.61 2.67 20XLK-1(1)-003 0.10 3.10 0.19 3.12 5.51 0.11 18.13 4.42 38.52 9.62 31.97 5.32 40.37 6.52 167.0 12.1 154.9 0.03 4.12 20XLK-1(1)-005 0.00 1.98 0.05 0.71 4.26 0.39 35.40 12.18 109.41 28.31 91.99 15.51 118.98 20.45 439.6 7.4 432.2 0.07 12.94 20XLK-1(1)-006 26.64 111.51 9.74 50.39 20.90 1.14 67.08 20.71 229.43 83.24 343.06 66.12 573.34 105.60 1708.9 220.3 1488.6 0.09 1.66 20XLK-1(1)-007 0.10 1.77 0.08 1.20 3.83 0.26 15.73 2.64 11.71 1.73 3.51 0.55 4.24 0.74 48.1 7.2 40.9 0.09 4.63 20XLK-1(1)-008 0.36 4.39 0.35 5.70 7.64 0.13 13.27 2.68 16.22 3.16 8.98 1.25 9.14 1.51 74.8 18.6 56.2 0.04 2.68 20XLK-1(1)-009 0.00 4.52 0.04 1.03 4.34 0.78 17.76 3.47 15.70 2.38 4.78 0.61 3.63 0.52 59.6 10.7 48.9 0.23 31.86 20XLK-1(1)-010 0.02 4.05 0.05 0.76 3.33 0.80 15.82 3.55 20.47 3.86 9.71 1.36 10.71 1.88 76.4 9.0 67.3 0.28 22.04 20XLK-1(1)-011 0.05 43.64 0.41 7.23 14.26 1.22 77.88 25.52 292.36 108.87 454.16 85.65 723.60 132.46 1967.3 66.8 1900.5 0.09 30.34 20XLK-1(1)-012 0.00 5.71 0.00 0.14 0.39 0.22 3.06 1.34 17.81 8.00 41.02 9.69 98.26 20.61 206.3 6.5 199.8 0.44 296.13 20XLK-1(1)-013 0.10 2.43 0.36 4.77 11.02 0.63 60.27 21.67 254.83 92.90 388.28 74.84 648.70 123.69 1684.5 19.3 1665.2 0.06 1.84 20XLK-1(1)-014 0.01 7.21 0.20 3.70 8.18 0.97 30.99 7.75 68.87 21.11 76.76 14.01 111.65 20.06 371.5 20.3 351.2 0.16 10.80 20XLK-1(1)-015 0.53 3.57 0.35 3.23 5.54 0.60 35.53 12.64 160.29 63.38 282.45 57.12 516.52 103.75 1245.5 13.8 1231.7 0.10 1.95 20XLK-1(1)-016 0.03 4.57 0.04 0.73 2.44 0.39 18.38 6.44 71.90 23.05 95.25 19.85 175.97 33.57 452.6 8.2 444.4 0.13 24.82 20XLK-1(1)-016-1 0.02 28.46 0.12 2.78 5.51 1.18 26.21 7.44 82.79 29.68 130.28 27.36 265.56 55.20 662.6 38.1 624.5 0.25 64.69 20XLK-1(1)-017 0.04 22.82 0.36 6.64 12.80 0.99 62.82 20.47 235.79 86.38 357.43 66.73 575.46 105.90 1554.6 43.6 1511.0 0.09 18.48 20XLK-1(1)-018 0.00 3.10 0.04 0.54 0.83 0.27 6.11 1.87 22.34 8.37 38.30 7.99 75.13 15.41 180.3 4.8 175.5 0.26 22.35 20XLK-1(1)-019 0.04 3.57 0.19 2.77 3.66 0.31 15.02 3.97 23.46 4.26 12.01 2.57 25.78 5.76 103.4 10.6 92.8 0.11 5.14 20XLK-1(1)-020 0.34 108.19 2.49 33.25 42.12 20.39 117.28 26.09 209.89 53.09 169.40 27.25 205.39 33.60 1048.8 206.8 842.0 0.83 12.46 20XLK-3-001 0.01 2.99 0.02 0.20 0.69 0.40 4.26 1.79 25.89 11.50 64.12 16.59 192.40 48.98 369.8 4.3 365.5 0.55 48.47 20XLK-3-003 0.10 31.63 0.82 8.23 11.37 2.24 54.01 17.58 204.26 74.53 322.41 62.92 553.10 103.51 1446.7 54.4 1392.3 0.23 11.08 20XLK-3-005 0.05 7.20 0.19 2.03 3.59 1.07 19.70 6.78 79.61 31.35 145.56 32.21 310.35 64.67 704.4 14.1 690.2 0.31 10.23 20XLK-3-006 0.00 26.39 0.06 0.83 1.62 0.36 11.61 4.44 60.34 26.13 128.12 29.66 287.08 59.89 636.5 29.3 607.3 0.19 140.35 20XLK-3-007 0.30 21.73 0.36 5.78 12.14 3.96 61.80 19.76 230.22 84.00 363.19 71.94 642.57 124.10 1641.8 44.3 1597.6 0.36 13.76 20XLK-3-008 0.38 25.01 0.35 4.31 4.17 0.83 17.02 4.80 54.82 20.80 98.28 22.56 223.23 49.00 525.6 35.0 490.5 0.26 15.29 20XLK-3-009 0.46 23.56 1.54 14.23 16.28 0.97 61.77 18.72 201.78 69.21 278.11 52.52 436.60 78.82 1254.6 57.0 1197.5 0.08 4.14 20XLK-3-010 0.02 27.08 0.11 1.76 5.22 1.69 32.54 11.60 147.96 57.53 257.93 54.63 509.55 102.06 1209.7 35.9 1173.8 0.30 71.20 20XLK-3-011 0.31 24.76 0.23 2.84 4.36 1.10 17.07 5.46 58.91 22.98 106.77 23.45 237.71 51.39 557.3 33.6 523.8 0.34 21.36 20XLK-3-013 0.01 14.60 0.05 0.82 3.18 1.15 33.60 14.39 194.76 76.21 345.54 70.45 633.60 119.41 1507.8 19.8 1488.0 0.21 92.34 20XLK-3-014 0.10 17.84 1.08 16.29 22.50 0.54 79.07 21.08 213.78 70.40 278.17 52.97 471.56 91.98 1337.4 58.3 1279.0 0.03 4.83 20XLK-3-015 0.08 15.07 0.52 8.23 13.11 1.96 62.84 19.92 217.85 78.11 324.08 62.23 536.81 102.90 1443.7 39.0 1404.8 0.17 8.30 20XLK-3-017 197.01 476.77 54.37 240.33 51.78 5.06 70.16 15.27 148.50 50.87 221.32 47.02 447.65 90.68 2116.8 1025.3 1091.5 0.26 1.09 20XLK-3-018 2.49 22.31 0.94 8.02 9.52 0.74 48.36 15.59 188.64 69.23 298.93 58.02 510.12 99.17 1332.1 44.0 1288.1 0.08 3.50 20XLK-3-019 0.18 3.50 0.15 1.72 4.23 0.29 19.96 4.77 36.56 10.28 37.80 6.86 56.43 11.23 194.0 10.1 183.9 0.08 4.82 20XLK-3-019-1 0.03 4.28 0.13 2.88 8.56 0.37 38.45 8.89 67.70 18.17 60.97 10.47 82.31 14.72 318.0 16.3 301.7 0.05 8.91 20XLK-3-020 0.03 21.48 0.10 1.22 2.60 0.86 12.47 4.00 50.70 20.76 105.23 26.00 287.28 67.27 600.0 26.3 573.7 0.38 58.86 20XLK-3-021-1 0.14 58.71 0.07 1.29 3.53 0.33 25.27 11.34 160.06 69.09 351.07 79.29 770.17 161.46 1691.8 64.1 1627.7 0.08 139.38 20XLK-3-022-1 0.06 6.45 0.04 0.47 1.19 0.43 6.92 2.48 32.31 13.62 68.61 16.47 166.68 38.12 353.8 8.6 345.2 0.35 30.44 20XLK-3-022-2 1.33 31.48 1.89 14.06 13.93 3.76 42.29 14.65 171.71 63.77 276.64 57.33 527.56 99.83 1320.2 66.5 1253.8 0.44 3.93 20XLK-3-021-2 0.40 4.01 0.23 1.89 3.66 0.90 18.68 7.75 100.62 36.52 158.42 32.34 292.73 56.63 714.8 11.1 703.7 0.27 3.11 20XLK-23-001 0.01 32.41 0.07 1.88 3.59 0.55 14.95 4.47 47.49 17.19 70.90 14.67 135.42 27.21 370.8 38.5 332.3 0.20 142.35 20XLK-23-002 95.28 215.88 18.99 68.87 11.41 1.55 15.42 3.87 43.52 17.14 84.14 19.40 202.65 46.08 844.2 412.0 432.2 0.36 1.15 20XLK-23-004 0.04 16.77 0.16 2.81 5.42 1.73 18.59 5.44 58.60 21.03 90.17 18.23 159.33 32.37 430.7 26.9 403.8 0.47 29.17 20XLK-23-005 0.09 45.07 0.27 4.66 10.44 0.49 69.71 24.29 294.63 108.74 450.27 85.28 707.40 125.47 1926.8 61.0 1865.8 0.04 44.93 20XLK-23-005-1 0.06 46.38 0.36 5.91 12.73 0.58 82.77 30.19 357.66 132.41 545.88 103.35 863.91 153.65 2335.9 66.0 2269.8 0.04 36.33 20XLK-23-006 27.33 89.01 5.70 22.80 4.81 1.07 12.65 3.53 42.32 17.50 88.67 20.95 224.52 49.64 610.5 150.7 459.8 0.40 1.63 20XLK-23-007 0.24 105.89 0.72 11.07 14.83 3.34 61.29 18.34 200.02 70.63 311.65 66.07 611.72 123.87 1599.7 136.1 1463.6 0.29 39.23 20XLK-23-008 0.00 7.20 0.08 2.11 4.85 2.17 21.67 6.63 66.27 23.24 95.12 18.36 160.18 31.93 439.8 16.4 423.4 0.54 28.84 20XLK-23-009 106.96 228.45 13.65 45.99 9.60 1.80 25.49 7.53 85.16 33.94 162.49 36.38 364.76 80.25 1202.5 406.5 796.0 0.33 1.24 20XLK-23-010 0.00 6.29 0.00 0.10 0.22 0.16 1.02 0.28 2.35 0.60 2.10 0.38 3.11 0.59 17.2 6.8 10.4 0.87 1032.83 20XLK-23-011 0.09 45.10 0.11 1.22 2.05 0.77 11.16 3.32 42.48 17.50 85.68 20.43 212.96 47.63 490.5 49.3 441.2 0.39 93.39 20XLK-23-012 0.02 26.84 0.26 4.63 6.76 1.04 22.15 6.10 63.17 23.50 105.41 22.46 208.73 41.39 532.5 39.6 492.9 0.24 30.34 20XLK-23-013 35.83 115.92 7.19 27.76 5.70 0.97 11.96 3.58 40.87 16.80 85.31 20.69 222.40 50.15 645.1 193.4 451.8 0.35 1.64 20XLK-23-014 14.89 58.35 2.98 12.74 3.47 0.81 10.87 3.23 38.68 15.38 75.16 17.82 184.80 41.96 481.1 93.2 387.9 0.37 1.99 20XLK-23-015 0.02 10.41 0.04 0.36 1.22 0.16 6.16 2.09 26.48 10.24 47.84 10.34 98.84 19.70 233.9 12.2 221.7 0.14 64.22 20XLK-23-016 0.72 336.37 5.33 66.41 64.52 26.29 187.71 49.60 495.31 165.71 681.80 138.14 1271.57 242.89 3732.4 499.7 3232.7 0.68 18.11 20XLK-23-017 92.45 236.12 15.23 71.72 36.49 14.64 114.14 28.95 288.42 97.34 411.67 83.64 779.11 157.19 2427.1 466.7 1960.5 0.63 1.38 20XLK-23-018 0.02 18.57 0.07 1.42 3.47 0.16 26.36 10.70 139.71 56.09 260.38 54.47 499.00 94.76 1165.2 23.7 1141.5 0.04 70.77 20XLK-23-019 0.55 37.16 0.22 1.62 2.48 0.80 11.83 3.88 48.54 19.41 99.25 23.34 246.12 55.92 551.1 42.8 508.3 0.37 25.38 20XLK-23-020 0.09 21.96 0.56 8.75 17.80 1.64 107.08 34.60 392.91 139.70 570.81 105.52 888.21 155.64 2445.3 50.8 2394.5 0.09 11.09 20XLK-23-021-1 0.08 18.58 0.03 0.63 1.10 0.60 7.81 2.82 34.94 14.70 72.94 17.31 185.35 39.75 396.7 21.0 375.6 0.45 82.89 20XLK-23-021-2 1.23 83.21 0.27 1.72 2.96 0.43 20.60 8.88 122.06 53.71 268.13 60.89 589.34 119.06 1332.5 89.8 1242.7 0.12 33.24 20XLK-23-021-3 2.12 57.14 0.44 2.58 2.85 0.63 14.61 5.13 64.23 26.14 125.81 29.17 286.98 61.43 679.3 65.8 613.5 0.24 13.53 注：δEu=2(Eu样/Eu球)/(Sm样/Sm球+Gd样/Gd球); δCe=2(Ce样/Ce球)/(La样/La球+Pr样/Pr球)，球粒陨石标准值据参考文献[17];检测下限为0.001×10-6
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表 4 煌斑岩脉中的Au含量
Table 4. Gold content in lamprophyre vein
赋存类型 样品数/个 Au品位范围/10-6 Au品位平均值/10-6 花岗质围岩 8 0.05~0.25 0.08 矿化蚀变带 25 0.05~0.60 0.11 蚀变带底板 9 0.05~0.08 0.05
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[1] 周晓萍, 吕军阳, 胡秉谦, 等. 胶北地体西涝口地区牧牛山二长花岗岩锆石U-Pb和Lu-Hf同位素研究——指示华北克拉通古元古代岩浆作用及地壳演化[J]. 地质论评, 2022, 68(3): 891-906. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLP202203009.htm
[2] 孙兴丽. 山东胶莱盆地西涝口金矿床的特征和成因[D]. 中国地质大学(北京)博士学位论文, 2013: 1-159.
[3] Cheng S B, Liu Z J, Wang Q F, et al. SHRIMP zircon U-Pb dating and Hf isotope analyses of the Muniushan monzogranite, Guocheng, Jiaobei terrane, China: implications for the tectonic evolution of the Jiao-Liao-Ji Belt, North China Craton[J]. Precambrian Research, 2017, 301: 36-48. doi: 10.1016/j.precamres.2017.09.002
[4] 谭俊. 山东郭城断裂带脉岩岩浆演化过程: 对岩石圈演化及金成矿的制约[D]. 中国地质大学(武汉)博士学位论文, 2009: 1-124.
[5] Ludwig K R. User's manual for Isoplot 3.00: a geochronological toolkit for Microsoft Excel[J]. Berkeley Geochronology Center Special Publication, 2003, 4: 1-70.
[6] 路凤香, 舒小辛, 赵崇贺. 有关煌斑岩分类的建议[J]. 地质科技情报, 1991, 10(增刊): 57-64. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ1991S1006.htm
[7] Hoskin P W O. Trace- element composition of hydrothermalzircon and the alteration of Hadean zircon from the Jack Hills, Australia[J]. Geochim. Cosmochim. Acta, 2005, 69(3): 637-648. doi: 10.1016/j.gca.2004.07.006
[8] 雷玮琰, 施光海, 刘迎新. 不同成因锆石的微量元素特征研究进展[J]. 地学前缘, 2013, 20(4): 273-284. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304028.htm
[9] 李长民. 锆石成因矿物学与锆石微区定年综述[J]. 地质调查与研究, 2009, 33(3): 161-173. https://www.cnki.com.cn/Article/CJFDTOTAL-QHWJ200903004.htm
[10] 李洪奎, 李大鹏, 耿科, 等. 胶东地区燕山期岩浆活动及其构造环境——来自单颗锆石SHRIMP年代学的记录[J]. 地质学报, 2017, 91(1): 163-178. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201701010.htm
[11] 宋英昕, 宋明春, 孙伟清, 等. 胶东金矿成矿时代及区域地壳演化——基性脉岩的SHRIMP锆石U-Pb年龄及其地质意义[J]. 地质通报, 2018, 37(5): 908-919 http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20180513&flag=1
[12] 黄智龙, 朱成明, 肖化云, 等. 煌斑岩-硫化物熔体液态不混溶作用的高温高压实验研究[J]. 地质评论, 1999, 45(增刊): 113-117. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLP1999S1016.htm
[13] 黄智龙, 朱成明, 肖化云, 等. 煌斑岩岩浆能携带金吗?——高温超高压实验的证据[J]. 科学通报, 1999, (12): 1331-1334. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199912020.htm
[14] 王登红, 应汉龙, 梁华英, 等. 西南三江地区新生代大陆动力学过程与大规模成矿[M]. 北京: 地质出版社, 2006: 1-208.
[15] 倪师军, 李朝阳, 张诚, 等. 中基性脉岩对金矿成矿的贡献——以小秦岭金矿区为例[J]. 成都工学院学报, 1994, 21(3): 70-78. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG403.009.htm
[16] 季海章, 赵懿英, 卢冰, 等. 胶东地区煌斑岩与金矿关系初探[J]. 地质与勘探, 1992, 28(2): 15-18. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKT199202002.htm
[17] 瓦西拉里, 李红中, 梁锦, 等. 煌斑岩的种类、成因及其与成矿作用的关系[J]. 中山大学研究生学刊(自然科学、医学版), 2011, 32(4): 1-13.
[18] Sun S S, McDonough W F. Chemical and isotopic systematics of oceanic basalts: implication for mantle composition and processes[J]. Geological Society Special Publication, 1989, 42(1): 313-345.
[19] 刘燊, 胡瑞忠, 赵军红, 等. 胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究系[J]. 岩石学报, 2005, 21(3): 947-958. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200503033.htm
[20] Wood D A. The application of a Th-Hf-Ta diagram to problems of tectonomagatic classification and to establishing the nature of crustal contamination of basalitic lavas of the British Tertiary volcanic province[J]. Earth Planet, 1980, 50: 11-30.
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