Zircon U-Pb Ages, Elements Geochemistry and Sr-Nd-Pb-Hf Isotopic Characteristics of Wulong Remelting Granite Intrusive Rocks in Liaodong Peninsula and Geological Significance
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摘要: 在华北克拉通东北缘的辽东半岛广泛发育一套形成于侏罗纪的花岗质岩体，出露于丹东地区的五龙花岗质岩体为五龙大型金矿床的围岩，岩体内分布有古元古界辽河岩群变质岩残留体和古元古代侵入岩残留体，多数发育碎裂岩化和糜棱岩化构造.对五龙岩体进行详细解体，认为其是由黑云母二长花岗岩、二云母二长花岗岩、黑云母花岗岩和花岗闪长岩组成的一套酸性侵入岩组合.根据锆石SHRIMP U-Pb测年结果，获得4种岩性的岩浆结晶年龄分别为162±3 Ma、169.3±3.1 Ma、157.5±1.7 Ma、158.0±2.7 Ma，形成于中-晚侏罗世.岩石地球化学特征显示，五龙岩体属于钙碱性-高钾钙碱性、过铝质、中温花岗质岩浆系列，富集Rb、Th、U、K等大离子亲石元素（LILE），亏损Nb、Ta、P、Ti等高场强元素（HFSE），δEu为0.56~1.97，异常变化范围较大，εHf（t）值为-39.7~-22.9，二阶段模式年龄tDM2为3 711~2 653 Ma，εNd（t）值为-23.8~-20.2，tDM2为2 782~2 487 Ma，显示岩浆源区来自太古代~古元古代壳源物质；结合Pb同位素特征以及石英、长石、云母的显微结构特征，认为五龙岩体是古元古代花岗岩和辽河岩群地层受侏罗纪~160 Ma陆壳重熔事件于上地壳原地重新结晶所形成的S型花岗质岩体，形成于中-晚侏罗世时期受古太平洋板块俯冲影响的挤压-造山构造背景.Abstract: Jurassic granitic intrusions are widely exposed on the Liaodong Peninsula on the northeastern margin of the North China craton. The Wulong granitic pluton in the Dandong area is the wall rock of the Wulong gold deposit,which contains residues of Paleoproterozoic Liaohe Group metamorphic rocks and Paleoproterozoic intrusive rocks,with fragmentation and mylonitization developed locally. In this paper,the Wulong pluton is studied in detail,revealing that it is an assemblage of acid intrusive rocks containing biotite monzonitic granite,two-mica monzonitic granite,biotite syenite granite and granodiorite. According to zircon SHRIMP U-Pb isotope dating,the crystallization ages of these four rock types are 162±3 Ma,169.3±3.1 Ma,157.5±1.7 Ma and 158.0±2.7 Ma,respectively,or Middle-Late Jurassic. The geochemistry of the rocks shows that the Wulong pluton belongs to the calc-alkaline to high-K calc-alkaline,peraluminous and mesothermal granitic magma series,with enrichments in large ion lithophile elements (LILE) such as Rb,Th,U and K and depletions in high field strength elements (HFSE) such as Nb,Ta,P,and Ti. The εHf(t) values range from -39.7 to -22.9,and the tDM2 values are between 3 711 Ma and 2 653 Ma. The εNd(t) values vary from -23.8 to -20.2,and the tDM2 values are between 2 782 Ma and 2 487 Ma. These results show that the magma source is Archean to Paleoproterozoic crustal materials. Combining this information with Pb isotopes and the microstructural characteristics of quartz,feldspar and mica,it is believed that the large-scale Jurassic Wulong pluton on the Liaodong Peninsula is S-type granite,which recrystallized from Paleoproterozoic granites and Liaohe Group rocks in-situ in the upper crust affected by Late Jurassic (ca. 160 Ma) crustal remelting. The pluton was formed in a compressional orogenic tectonic setting influenced by the subduction of the Paleo-Pacific plate during the Middle-Late Jurassic.
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图 1 辽东半岛构造地质图
据张朋等(2019）.1.QS第四系沉积; 2.CzV新生代火山岩; 3.MzV中生代火山岩; 4.MzS中生代沉积岩; 5.Pt2-Pz1中元古代-古生代沉积岩系列; 6.Pt1lh 古元古界辽河岩群; 7.Ar太古界基底; 8.γK2晚白垩世花岗岩类; 9.γK1早白垩世花岗岩类; 10.γJ2-3中晚侏罗世花岗岩类; 11.γJ1早侏罗世花岗岩类; 12.γT3晚三叠世花岗岩类; 13.γT1-2早中三叠世花岗岩类; 14.γPt1古元古代花岗岩类; 15.断裂
Fig. 1. Tectonic geological map of Liaodong Peninsula
图 2 辽东半岛五龙金矿集区地质图及采样位置
1.QS第四系沉积; 2.Pt1gx古元古界辽河岩群盖县岩组; 3.Pt1lr古元古界辽河岩群里尔峪岩组; 4.ηγK1早白垩世二长花岗岩; 5.γδK1早白垩世花岗闪长岩; 6.δοK1早白垩世石英闪长岩; 7.ρJ3伟晶岩; 8.ηγβJ3晚侏罗世黑云母二长花岗岩; 9.ηγβmJ3晚侏罗世二云母二长花岗岩; 10.ξγβJ3晚侏罗世黑云母花岗岩; 11.γδJ3晚侏罗世花岗闪长岩; 12.Pt1abl斜长角闪岩; 13.断裂带; 14.糜棱岩化带; 15.金矿床; 16.采样位置
Fig. 2. Tectonic geological map and sampling locations of Wulong goldfield of the Liaodong Peninsula
图 3 辽东半岛五龙岩体样品照片(a, d, g, j)及显微镜下正交偏光(b, e, h, k)和单偏光特征(c, f, i, l)
TW01.糜棱岩化黑云母二长花岗岩; TW02.糜棱岩化黑云母花岗岩; TW03.糜棱岩化二云母二长花岗岩; TW04.碎裂岩化花岗闪长岩; Bt.黑云母; Mc.微斜长石; Ms.白云母; Oli.更长石; Qtz.石英
Fig. 3. Photographs (a, d, g, j), crossed-polarized micrographs (b, e, h, k) and plane-polarized micrographs (c, f, i, l) of rock samples obtained from Wulong pluton of the Liaodong Peninsula
图 4 辽东半岛五龙岩体锆石CL图像和测试点位
Fig. 4. Cathodoluminescence (CL) images and test positions of representative zircons of the samples obtained from Wulong pluton of the Liaodong Peninsula
图 5 辽东半岛五龙岩体锆石SHRIMP U-Pb测年谐和图
Fig. 5. SHRIMP U-Pb concordia diagrams of zircons of the samples obtained from the Wulong pluton of the Liaodong Peninsula
图 6 辽东半岛五龙岩体A/CNK-A/NK图解(a)、K2O-SiO2图解(b)
a.据Maniar and Piccoli（1989）; b.据Peccerillo and Taylor（1976）
Fig. 6. A/CNK-A/NK diagram (a) and K2O-SiO2 diagram (b) of the samples obtained from the Wulong pluton of the Liaodong Peninsula
图 7 辽东半岛五龙岩体微量元素原始地幔标准化图解(a, c, e, g)、稀土元素球粒陨石标准化图解(b, d, f, h)
Fig. 7. Primitive mantle-normalized trace elements patterns (a, c, e, g) and chondrite-normalized REE patterns (b, d, f, h) of the samples obtained from the Wulong pluton of the Liaodong Peninsula
图 8 五龙岩体锆石微区εHf (t)-年龄相关图解(a)和(176Hf/177Hf)i-年龄相关图解(b)
a, b.据吴福元等（2007）
Fig. 8. Illustrations of age determined by εHf(t) (a) and age determined by (176Hf/177Hf)i (b) for different domains of zircons from the samples obtained from the Wulong pluton
图 9 辽东半岛五龙岩体黑云母二长花岗岩(87Sr/86Sr)i-εNd(t)图解(a)和Pb同位素构造模式图解(b)
a.据Jahn et al.（1999）; b.据Zartman and Doe（1981）；YC.扬子克拉通; NCC.华北克拉通
Fig. 9. Diagrams of (87Sr/86Sr)i-εNd(t) (a) and Pb isotopic compositions (b) of biotite monzogranite obtained from the Wulong pluton
图 10 辽东半岛五龙岩体Rb-Y+Nb图解(a)和R1-R2图解(b)
a.据Pearce et al.（1984）; b.据Batchelor and Bowden（1985）.a.ORG-洋中脊花岗岩; Syn-COLG.同碰撞花岗岩; VAG.火山弧花岗岩; WPG.板内花岗岩. b.1.地幔分异(斜长花岗岩); 2.破坏性活动板块边缘(板块碰撞前)花岗岩; 3.板块碰撞后隆起期花岗岩; 4.晚造山期花岗岩; 5.非造山期A型花岗岩; 6.同碰撞S型花岗岩; 7.造山期后A型花岗岩. R1=[4Si－11(Na+K)－2(Fe+Ti)]; R2=(Al+2Mg+6Ca)
Fig. 10. Rb-Y+Nb (a) and R1-R2 (b) diagrams of the samples obtained from the Wulong pluton
表 1 五龙岩体锆石SHRIMP U⁃Pb测年结果
Table 1. SHRIMP U-Pb data of zircons from the samples obtained from the Wulong pluton of the Liaodong Peninsula
分析点号 206Pbc (%) U (10-6) Th (10-6) 232Th/ 238U 206Pb* (10-6) 207Pb*/206Pb* 1σ (%) 207Pb*/235U 1σ(%) 206Pb*/238U 1σ (%) err corr 206Pb/238U年龄(Ma) 207Pb/206Pb年龄(Ma) 不谐和度(%) TW01 1.1 0.37 2 515 165 0.07 61.2 0.048 10 2.1 0.187 3 2.6 0.028 21 1.5 0.587 179.3 ±2.7 106 ± 50 -68 2.1 0.17 1 738 143 0.08 38.7 0.048 80 1.6 0.174 0 2.2 0.025 85 1.5 0.697 164.5 ±2.5 138 ± 37 -19 3.1 0.42 361 35 0.10 11.3 0.049 20 2.9 0.246 9 3.5 0.036 43 1.9 0.540 230.6 ±4.3 155 ± 69 -49 4.1 0.27 2 062 58 0.03 50.1 0.048 77 1.5 0.189 8 2.2 0.028 22 1.6 0.721 179.4 ±2.8 137 ± 36 -31 5.1 0.95 93 103 1.15 2.10 0.054 60 8.9 0.196 0 9.2 0.026 11 2.0 0.215 166.2 ±3.2 395 ±200 58 6.1 0.16 2 603 615 0.24 60.6 0.049 08 1.3 0.183 0 2.1 0.027 04 1.6 0.786 172.0 ±2.7 152 ± 30 -13 7.1 0.11 2 160 275 0.13 47.7 0.048 17 1.2 0.170 6 2.0 0.025 68 1.5 0.779 163.5 ±2.5 108 ± 29 -52 8.1 0.73 205 86 0.43 4.40 0.049 20 4.4 0.167 9 4.9 0.024 76 2.2 0.449 157.7 ±3.4 157 ±100 -1 9.1 0.35 480 79 0.17 10.4 0.048 30 3.2 0.167 3 3.7 0.025 14 1.8 0.496 160.1 ±2.9 112 ± 76 -43 10.1 0.15 1 006 345 0.35 41.4 0.085 80 7.8 0.566 0 8.0 0.047 85 1.6 0.197 301.3 ±4.6 1 335 ±150 77 11.1 0.29 1 215 57 0.05 26.9 0.048 30 2.3 0.171 0 2.8 0.025 67 1.6 0.572 163.4 ±2.5 114 ± 54 -43 12.1 0.27 624 264 0.44 13.3 0.049 40 2.7 0.168 6 3.1 0.024 77 1.6 0.508 157.7 ±2.5 166 ± 62 5 TW02 1.1 0.56 106 44 0.43 2.25 0.045 80 6.3 0.155 0 6.6 0.024 50 2.1 0.323 156.1 ± 3.3 -12 ±150 1 383 2.1 0.01 47 63 1.39 1.01 0.050 90 19 0.175 0 19 0.024 90 2.4 0.124 158.6 ± 3.7 237 ±440 33 3.1 0.61 175 166 0.98 5.32 0.049 50 4.1 0.241 0 4.4 0.035 22 1.6 0.367 223.1 ± 3.6 173 ± 96 -29 4.1 -- 73 50 0.71 1.43 0.053 00 4.7 0.168 5 5.1 0.023 05 1.9 0.381 146.9 ± 2.8 329 ±110 55 5.1 0.87 43 30 0.73 0.901 0.045 30 14 0.152 0 14 0.024 31 2.2 0.160 154.8 ± 3.4 -38 ±340 503 6.1 0.02 381 246 0.67 114 0.116 30 1.0 5.600 0 1.8 0.349 00 1.5 0.826 1 930 ±25 1 901 ± 18 -2 7.1 1.23 91 59 0.66 1.95 0.045 00 15 0.153 0 15 0.024 65 2.0 0.131 157.0 ± 3.0 -57 ±360 377 8.1 -- 571 195 0.35 12.1 0.049 65 1.7 0.169 5 2.3 0.024 76 1.5 0.655 157.7 ± 2.4 179 ± 41 12 9.1 0.05 253 118 0.48 70.3 0.109 50 2.2 4.890 0 2.7 0.323 90 1.6 0.572 1 809 ±25 1 792 ± 41 -1 10.1 0.06 1 061 97 0.09 22.9 0.049 00 1.7 0.170 0 2.2 0.025 16 1.5 0.663 160.2 ± 2.3 148 ± 39 -8 11.1 0.30 552 104 0.19 11.6 0.046 90 2.7 0.158 4 3.1 0.024 49 1.5 0.493 156.0 ± 2.3 44 ± 64 -252 12.1 0.35 469 50 0.11 10.00 0.047 30 3.8 0.162 1 4.1 0.024 86 1.7 0.415 158.3 ± 2.7 63 ± 89 -149 13.1 0.09 756 182 0.25 16.2 0.048 71 1.6 0.167 4 2.2 0.024 93 1.5 0.686 158.7 ± 2.3 134 ± 37 -19 14.1 0.87 91 59 0.67 1.94 0.046 80 11 0.158 0 11 0.024 50 1.9 0.174 156.0 ± 3.0 40 ±260 -293 TW03 1.1 0.41 549 31 0.06 12.3 0.047 90 3.8 0.171 8 3.9 0.026 04 0.97 0.248 165.7 ±1.6 92 ± 90 -80 2.1 0.15 5 088 1 492 0.30 120 0.049 61 0.89 0.187 0 1.2 0.027 34 0.83 0.683 173.9 ±1.4 177 ± 21 2 3.1 -- 1 053 408 0.40 22.7 0.048 73 1.5 0.168 7 1.7 0.025 11 0.89 0.513 159.9 ±1.4 135 ± 35 -18 4.1 0.08 743 27 0.04 17.0 0.050 60 2.4 0.185 8 2.6 0.026 61 0.92 0.360 169.3 ±1.5 224 ± 55 24 5.1 0.17 393 21 0.06 8.69 0.049 20 2.7 0.174 0 2.8 0.025 67 1.00 0.354 163.4 ±1.6 155 ± 62 -5 6.1 0.11 710 36 0.05 16.4 0.048 60 2.4 0.179 7 2.5 0.026 81 0.93 0.364 170.5 ±1.6 129 ± 56 -32 7.1 0.48 581 50 0.09 12.1 0.048 60 3.4 0.161 1 3.5 0.024 01 0.96 0.273 153.0 ±1.5 131 ± 80 -17 8.1 0.25 330 161 0.50 6.88 0.049 30 6.0 0.164 0 6.1 0.024 18 1.10 0.182 154.0 ±1.7 161 ±140 5 9.1 0.01 751 75 0.10 17.0 0.050 69 1.9 0.183 6 2.1 0.026 27 0.92 0.443 167.2 ±1.5 227 ± 43 26 10.1 0.64 198 43 0.22 4.19 0.045 40 4.6 0.153 1 4.8 0.024 44 1.20 0.248 155.7 ±1.8 -32 ±110 588 11.1 0.12 314 5 0.02 7.20 0.048 20 3.9 0.177 2 4.2 0.026 67 1.50 0.357 169.7 ±2.5 108 ± 92 -57 12.1 0.03 1 915 227 0.12 44.9 0.049 23 1.5 0.185 0 1.7 0.027 26 0.86 0.498 173.4 ±1.5 159 ± 35 -9 TW04 1.1 -- 195 48 0.26 3.99 0.051 00 5.1 0.168 4 5.2 0.023 96 1.20 0.234 152.7 ±1.9 239 ±120 36 2.1 -- 58 53 0.94 1.21 0.063 70 6.3 0.216 0 6.6 0.024 61 1.90 0.293 156.7 ±3.0 732 ±130 79 3.1 0.48 552 171 0.32 12.1 0.048 90 3.5 0.171 5 3.7 0.025 42 1.20 0.319 161.8 ±1.9 145 ± 83 -12 4.1 0.33 336 31 0.09 7.05 0.048 70 2.8 0.163 4 2.9 0.024 32 1.00 0.351 154.9 ±1.6 135 ± 65 -15 5.1 0.17 665 381 0.59 11.5 0.049 30 3.9 0.136 6 4.0 0.020 09 0.97 0.245 128.3 ±1.2 163 ± 90 21 6.1 0.79 124 165 1.38 2.49 0.050 80 7.8 0.163 0 8.0 0.023 20 2.00 0.248 147.8 ±2.9 233 ±180 36 7.1 0.33 379 315 0.86 8.20 0.047 70 4.8 0.165 0 4.9 0.025 09 1.00 0.212 159.8 ±1.6 84 ±110 -90 8.1 0.05 297 80 0.28 6.51 0.049 90 5.7 0.176 0 5.8 0.025 51 1.10 0.190 162.4 ±1.8 193 ±130 16 9.1 0.07 806 151 0.19 17.20 0.049 10 2.9 0.168 1 3.0 0.024 85 0.96 0.319 158.2 ±1.5 152 ± 67 -4 10.1 0.19 796 133 0.17 17.10 0.047 80 2.5 0.164 7 2.7 0.025 01 0.96 0.352 159.2 ±1.5 88 ± 60 -81 11.1 0.47 311 21 0.07 6.56 0.049 40 6.4 0.166 0 6.5 0.024 44 1.10 0.165 155.7 ±1.6 165 ±150 6 注：误差为1σ，Pbc和Pb*分别表示普通铅和放射性铅，普通铅使用204Pb校正. 
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表 2 辽东半岛五龙岩体主量元素(%)分析结果
Table 2. Major elements (%) compositions of the samples obtained from the Wulong pluton of the Liaodong Peninsula
样品号 SiO2 TiO2 Al2O3 Fe2O3 FeO MnO MgO CaO Na2O K2O P2O5 LOI Total K2O/ Na2O A/CNK DI σ43 AR M t TW01-1 73.26 0.13 14.71 0.15 0.90 0.01 0.23 1.26 3.81 4.93 0.06 0.47 99.92 1.30 1.06 90.6 2.52 2.82 1.66 738 TW01-2 70.18 0.14 16.41 0.14 0.67 0.01 0.25 1.47 4.27 5.78 0.05 0.40 99.77 1.35 1.03 90.3 3.70 2.83 1.81 729 TW01-3 73.93 0.13 14.23 0.33 0.63 0.01 0.23 1.04 3.75 4.97 0.07 0.46 99.77 1.33 1.06 92.1 2.45 2.93 1.63 741 TW01-4 74.00 0.12 14.08 0.22 1.08 0.01 0.24 1.23 3.89 4.63 0.08 0.41 99.99 1.19 1.03 90.8 2.33 3.06 1.67 739 TW01-5 74.38 0.12 14.15 0.34 0.83 0.01 0.23 1.11 3.93 4.48 0.05 0.32 99.96 1.14 1.06 91.4 2.25 3.12 1.60 745 TW02-1 72.56 0.15 14.91 0.59 0.76 0.02 0.57 1.77 3.92 3.51 0.07 0.71 99.53 0.89 1.11 86.5 1.86 2.61 1.57 758 TW02-2 71.68 0.16 15.04 0.66 0.81 0.02 0.43 1.87 4.31 4.02 0.06 0.59 99.65 0.93 1.01 87.5 2.41 2.94 1.75 746 TW02-3 72.33 0.16 15.31 0.62 1.03 0.02 0.40 1.92 4.01 3.62 0.08 0.55 100.07 0.90 1.09 85.9 1.98 2.59 1.62 755 TW02-4 72.05 0.15 15.07 0.54 0.90 0.02 0.39 1.93 4.08 3.75 0.08 0.53 99.49 0.92 1.05 86.6 2.10 2.71 1.67 752 TW02-5 72.07 0.17 15.20 0.67 1.03 0.02 0.42 1.91 4.01 3.65 0.08 0.53 99.76 0.91 1.08 85.9 2.01 2.62 1.63 756 TW03-1 73.71 0.14 14.05 0.84 0.40 0.03 0.06 0.83 4.13 4.17 0.04 1.61 100.01 1.01 1.10 92.8 2.23 3.49 1.50 774 TW03-2 73.28 0.13 14.05 0.65 0.67 0.04 0.09 1.16 4.23 3.59 0.04 1.90 99.84 0.85 1.08 91.0 2.01 3.12 1.52 774 TW03-3 73.68 0.12 13.67 0.78 0.49 0.03 0.13 1.11 4.20 3.71 0.04 1.86 99.83 0.88 1.05 91.6 2.02 3.30 1.55 772 TW03-4 73.25 0.13 14.12 0.66 0.40 0.03 0.07 1.23 4.31 3.82 0.04 1.97 100.03 0.89 1.05 91.6 2.17 3.26 1.58 770 TW03-5 73.23 0.13 14.31 0.64 0.49 0.03 0.10 1.08 3.96 3.69 0.04 2.06 99.75 0.93 1.15 90.9 1.91 2.97 1.44 781 TW04-1 72.04 0.16 15.73 0.96 1.19 0.02 0.45 2.15 4.50 1.45 0.06 1.19 99.91 0.32 1.22 82.3 1.21 2.00 1.36 790 TW04-2 71.52 0.21 15.61 0.94 1.03 0.02 0.42 1.97 4.19 2.47 0.06 1.02 99.45 0.59 1.19 83.9 1.54 2.22 1.44 784 TW04-3 72.02 0.18 15.62 1.06 0.85 0.02 0.44 1.93 4.42 1.64 0.07 1.30 99.56 0.37 1.24 83.5 1.26 2.05 1.32 794 TW04-4 72.93 0.19 14.48 0.83 0.94 0.01 0.44 1.86 3.96 3.21 0.06 0.60 99.50 0.81 1.08 86.1 1.71 2.56 1.59 775 TW04-5 72.33 0.17 14.90 0.75 1.17 0.02 0.66 2.11 4.25 2.54 0.06 0.74 99.68 0.60 1.10 83.8 1.56 2.33 1.56 777 注：A/CNK=n(Al2O3)/[n(CaO)+n(Na2O)+n(K2O)]，DI(标准矿物组分：石英+正长石+钠长石+霞石+白榴石+六方钾霞石).M=(Na+K+2Ca)/(Altlei(阳离子比率))；t(℃)=12 900/{ln[496 000/ω(Zr)]+0.85M+2.95}-273.5，据Watson and Harrison(1983).
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表 3 辽东半岛五龙岩体微量元素(10-6)分析结果
Table 3. Trace elements (10-6) compositions of the samples obtained from the Wulong pluton of the Liaodong Peninsula
样品号 Hf Ta Th U Li Be Sc Co Ni Ba Cr Ga Nb Rb Sr V Zr Y TW01-1 3.39 0.76 5.11 1.68 8.18 2.03 3.69 3.12 1.40 900 25.00 22.00 9.75 129 370 9.69 107 8.17 TW01-2 3.53 1.09 6.13 1.90 7.18 2.11 2.77 3.47 1.12 1 200 16.60 22.30 9.14 143 439 12.00 114 9.08 TW01-3 3.25 1.48 6.42 3.48 7.47 2.80 4.04 2.82 0.71 889 27.00 22.50 14.10 140 344 6.96 94.4 8.81 TW01-4 3.25 4.28 6.44 1.84 9.40 2.07 3.34 2.90 0.62 799 18.50 22.90 11.40 131 326 7.31 86.3 9.06 TW01-5 2.85 0.76 5.26 6.15 7.76 2.07 2.45 3.10 1.28 738 20.40 22.20 9.63 125 325 8.00 85.5 6.38 TW02-1 2.53 0.73 3.82 0.62 8.51 2.03 1.92 2.26 3.31 100 18.40 20.90 6.00 107 557 8.96 68.5 5.15 TW02-2 1.89 0.42 2.63 0.48 10.60 2.09 2.25 2.55 2.83 110 18.50 20.60 6.42 113 566 7.81 71.1 3.76 TW02-3 2.49 1.21 3.34 0.57 8.57 2.19 3.23 2.75 3.14 110 16.70 21.40 6.90 107 567 11.50 75.9 3.85 TW02-4 1.68 1.07 2.34 0.56 9.73 2.24 3.38 2.25 2.94 110 15.30 20.60 5.51 108 569 11.40 74.5 4.45 TW02-5 2.29 1.25 3.11 0.52 9.84 2.11 2.41 2.49 2.87 110 16.90 21.40 6.41 111 570 9.51 74.3 5.15 TW03-1 1.78 0.28 5.30 0.60 6.14 1.38 3.27 2.77 2.92 1 400 16.28 17.68 7.95 133.17 440.40 11.75 56.08 11.10 TW03-2 2.16 0.31 5.38 0.56 6.74 1.58 4.46 2.58 4.50 1 200 17.86 18.24 8.09 129.88 394.51 8.80 60.78 10.91 TW03-3 2.27 0.39 5.37 0.57 9.88 1.63 2.51 2.68 4.18 1 200 15.27 18.12 8.47 128.16 451.53 8.42 53.87 13.58 TW03-4 2.25 0.26 4.79 0.52 8.04 1.51 2.85 2.64 4.65 1 300 26.42 17.79 6.50 126.54 432.99 10.28 54.76 10.37 TW03-5 2.36 0.30 5.44 0.46 7.46 1.88 2.77 2.55 4.42 1 100 15.67 20.51 7.02 135.11 359.34 10.82 63.15 9.70 TW04-1 4.54 0.84 7.80 1.45 7.15 2.66 2.42 4.05 2.68 452 18.50 22.00 7.41 52.1 565 12.60 118 7.08 TW04-2 4.02 1.59 6.05 0.95 8.49 2.03 2.65 2.57 1.67 120 14.50 21.30 7.38 69.3 635 10.10 124 6.13 TW04-3 4.55 0.73 5.47 1.08 7.81 2.57 2.10 2.67 2.54 568 18.90 22.30 8.39 53.6 558 12.30 136 5.70 TW04-4 3.59 0.38 4.28 0.52 7.25 1.68 1.98 2.58 1.63 160 14.70 18.70 5.34 75.0 655 11.90 110 5.18 TW04-5 3.98 19.6 4.22 0.87 7.55 1.98 3.19 2.81 2.05 120 11.60 19.50 6.01 64.4 636 12.80 114 5.07
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表 4 辽东半岛五龙岩体稀土元素(10-6)分析结果
Table 4. Rare earth elements (10-6) compositions of the samples obtained from the Wulong pluton of the Liaodong Peninsula
样品号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ΣREE LREE/HREE Eu /Eu* TW01-1 32.50 57.70 6.22 22.30 3.71 0.61 3.00 0.41 1.70 0.28 0.80 0.34 0.70 0.087 130.42 16.79 0.56 TW01-2 40.30 71.70 7.78 28.00 4.79 0.83 3.87 0.51 2.01 0.34 0.92 0.28 0.82 0.098 162.27 17.32 0.59 TW01-3 39.60 72.70 7.25 25.60 4.34 0.95 3.63 0.48 1.91 0.31 0.85 0.29 0.73 0.088 158.68 18.15 0.73 TW01-4 28.40 52.30 5.44 19.30 3.31 0.73 2.68 0.39 1.83 0.31 0.90 0.53 0.80 0.100 117.02 14.53 0.75 TW01-5 42.30 71.10 7.60 26.70 4.40 0.85 3.68 0.45 1.56 0.23 0.59 0.15 0.50 0.063 160.22 21.19 0.65 TW02-1 32.00 47.90 5.14 18.00 3.17 1.11 2.25 0.34 1.17 0.18 0.49 0.11 0.38 0.042 112.22 21.63 1.27 TW02-2 21.70 37.00 3.83 13.00 2.01 1.11 1.46 0.22 0.84 0.13 0.34 0.11 0.26 0.028 82.02 23.18 1.97 TW02-3 22.50 42.50 4.48 15.30 2.42 0.78 1.73 0.26 0.92 0.13 0.33 0.12 0.25 0.026 91.61 23.36 1.16 TW02-4 26.00 45.60 4.76 16.30 2.47 1.11 1.90 0.27 1.04 0.15 0.39 0.11 0.30 0.035 100.45 23.03 1.56 TW02-5 27.00 46.80 4.87 16.60 2.53 1.12 2.02 0.28 1.09 0.18 0.46 0.19 0.36 0.042 103.53 21.43 1.52 TW03-1 21.97 38.75 4.33 14.84 2.30 1.19 2.09 0.31 1.90 0.41 1.15 0.17 0.91 0.140 90.46 11.79 1.66 TW03-2 20.52 36.35 4.03 14.12 2.27 1.12 2.00 0.31 1.84 0.39 1.09 0.16 0.95 0.140 85.29 11.40 1.60 TW03-3 22.09 36.85 4.12 14.54 2.34 1.24 2.16 0.34 2.09 0.46 1.34 0.19 1.06 0.170 88.98 10.41 1.68 TW03-4 19.14 34.03 3.77 13.07 2.02 1.18 1.80 0.25 1.43 0.29 0.84 0.13 0.70 0.110 78.76 13.19 1.90 TW03-5 20.48 38.06 4.17 14.04 2.22 1.11 1.98 0.30 1.57 0.35 0.92 0.16 0.81 0.140 86.32 12.83 1.61 TW04-1 38.30 69.00 6.99 23.40 3.67 0.86 3.12 0.39 1.53 0.25 0.70 0.13 0.73 0.099 149.16 20.45 0.78 TW04-2 51.90 91.70 9.21 30.70 4.14 1.03 3.69 0.41 1.38 0.22 0.61 0.13 0.51 0.064 195.59 26.87 0.80 TW04-3 42.60 76.60 7.66 25.10 3.75 0.90 3.12 0.37 1.33 0.21 0.57 0.12 0.55 0.068 162.90 24.69 0.81 TW04-4 44.20 80.30 8.07 27.20 3.50 0.95 3.12 0.36 1.17 0.18 0.51 0.14 0.40 0.048 170.16 27.71 0.88 TW04-5 43.20 75.40 7.57 25.30 3.43 1.29 3.12 0.35 1.20 0.18 0.50 0.10 0.44 0.058 162.13 26.26 1.20
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表 5 辽东半岛五龙岩体LA⁃MC⁃ICP⁃MS锆石原位微区Lu⁃Hf同位素测试结果
Table 5. Lu-Hf isotopic compositions of the in-situ zircons of the samples obtained from the Wulong pluton of the Liaodong Peninsula as determined by LA-MC-ICP-MS
分析点号 t(Ma) 176Yb/177Hf 2σ 176Lu/177Hf 2σ 176Hf/177Hf 2σ εHf (0) εHf (t) (176Hf/177Hf)i tDM1 tDM2 fLu/Hf TW01 1.1 179.3 0.023 434 0.000 220 0.000 877 0.000 008 0.281 880 0.000 032 -31.6 -27.7 0.281 877 1 920 2 970 -0.97 2.1 164.5 0.018 376 0.000 220 0.000 720 0.000 008 0.281 696 0.000 024 -38.1 -34.5 0.281 694 2 164 3 383 -0.98 3.1 230.6 0.015 299 0.000 197 0.000 649 0.000 009 0.282 035 0.000 020 -26.1 -21.1 0.282 032 1 696 2 593 -0.98 4.1 179.4 0.014 829 0.000 215 0.000 614 0.000 009 0.281 833 0.000 016 -33.2 -29.4 0.281 831 1 971 3 071 -0.98 5.1 166.2 0.013 262 0.000 156 0.000 546 0.000 007 0.281 828 0.000 019 -33.4 -29.8 0.281 826 1 974 3 090 -0.98 6.1 172.0 0.023 850 0.000 816 0.000 852 0.000 023 0.281 792 0.000 040 -34.7 -31.0 0.281 789 2 040 3 168 -0.97 7.1 163.5 0.034 778 0.000 382 0.001 313 0.000 012 0.281 887 0.000 032 -31.3 -27.8 0.281 883 1 932 2 965 -0.96 8.1 157.7 0.016 193 0.000 470 0.000 659 0.000 020 0.281 834 0.000 029 -33.2 -29.8 0.281 833 1 971 3 082 -0.98 9.1 160.1 0.009 407 0.000 630 0.000 359 0.000 025 0.281 849 0.000 024 -32.7 -29.2 0.281 848 1 937 3 047 -0.99 10.1 301.3 0.031 836 0.000 521 0.001 246 0.000 020 0.281 440 0.000 037 -47.1 -40.7 0.281 433 2 546 3 864 -0.96 11.1 163.4 0.011 176 0.000 239 0.000 470 0.000 010 0.281 789 0.000 027 -34.8 -31.2 0.281 788 2 023 3 177 -0.99 12.1 157.7 0.024 129 0.000 829 0.000 994 0.000 035 0.281 733 0.000 032 -36.8 -33.4 0.281 730 2 129 3 308 -0.97 TW02 1.1 156.1 0.007 272 0.000 073 0.000 315 0.000 003 0.281 935 0.000 014 -29.6 -26.2 0.281 934 1 817 2 859 -0.99 2.1 158.6 0.001 564 0.000 037 0.000 056 0.000 001 0.281 888 0.000 015 -31.3 -27.8 0.281 888 1 868 2 959 -1.00 3.1 223.1 0.006 525 0.000 028 0.000 262 0.000 001 0.282 200 0.000 015 -20.2 -15.4 0.282 198 1 455 2 230 -0.99 4.1 146.9 0.005 354 0.000 338 0.000 214 0.000 012 0.281 779 0.000 035 -35.1 -31.9 0.281 779 2 023 3 207 -0.99 5.1 154.8 0.000 946 0.000 111 0.000 033 0.000 004 0.281 909 0.000 017 -30.5 -27.1 0.281 909 1 839 2 916 -1.00 6.1 1 901 0.004 039 0.000 250 0.000 135 0.000 007 0.281 379 0.000 016 -49.3 -7.0 0.281 374 2 556 2 971 -1.00 7.1 157.0 0.004 100 0.000 339 0.000 166 0.000 013 0.281 908 0.000 029 -30.6 -27.1 0.281 907 1 847 2 918 -1.00 8.1 157.7 0.012 546 0.001 134 0.000 467 0.000 042 0.281 575 0.000 037 -42.3 -38.9 0.281 574 2 313 3 651 -0.99 9.1 1 792 0.009 805 0.000 065 0.000 393 0.000 002 0.281 494 0.000 015 -45.2 -5.7 0.281 481 2 418 2 808 -0.99 10.1 160.2 0.062 268 0.000 736 0.002 312 0.000 027 0.281 592 0.000 053 -41.7 -38.5 0.281 585 2 405 3 621 -0.93 11.1 156.0 0.024 812 0.001 086 0.000 989 0.000 039 0.282 030 0.000 043 -26.2 -22.9 0.282 027 1 718 2 653 -0.97 12.1 158.3 0.007 649 0.000 156 0.000 337 0.000 006 0.281 997 0.000 016 -27.4 -24.0 0.281 996 1 734 2 720 -0.99 13.1 158.70.040 0010.001 5390.001 6900.000 0610.284 7000.000 13368.271.50.284 695- 2 158- 3 474- 0.9514.1 156.0 0.017 852 0.000 088 0.000 768 0.000 004 0.281 907 0.000 021 -30.6 -27.3 0.281 904 1 878 2 924 -0.98 TW03 1.1 165.7 0.007 889 0.000 035 0.000 330 0.000 001 0.281 980 0.000 017 -28.0 -24.4 0.281 979 1 757 2 754 -0.99 2.1 173.9 0.041 134 0.001 259 0.001 637 0.000 047 0.281 546 0.000 049 -43.4 -39.7 0.281 540 2 426 3 711 -0.95 3.1 159.9 0.074 240 0.000 668 0.002 977 0.000 026 0.281 648 0.000 028 -39.7 -36.5 0.281 640 2 367 3 500 -0.91 4.1 169.3 0.006 434 0.000 130 0.000 274 0.000 005 0.281 971 0.000 017 -28.3 -24.7 0.281 970 1 767 2 771 -0.99 5.1 163.4 0.008 089 0.000 047 0.000 337 0.000 002 0.281 985 0.000 015 -27.8 -24.3 0.281 984 1 751 2 745 -0.99 6.1 170.5 0.015 427 0.000 155 0.000 637 0.000 007 0.281 967 0.000 018 -28.5 -24.8 0.281 965 1 789 2 781 -0.98 7.1 153.0 0.011 438 0.000 393 0.000 469 0.000 015 0.281 922 0.000 021 -30.0 -26.7 0.281 921 1 842 2 890 -0.99 8.1 154.0 0.017 770 0.000 359 0.000 726 0.000 015 0.281 983 0.000 025 -27.9 -24.6 0.281 981 1 771 2 756 -0.98 9.1 167.2 0.013 954 0.000 114 0.000 548 0.000 005 0.281 903 0.000 018 -30.7 -27.1 0.281 901 1 872 2 924 -0.98 10.1 155.7 0.012 414 0.000 262 0.000 523 0.000 011 0.281 928 0.000 021 -29.8 -26.5 0.281 927 1 836 2 875 -0.98 11.1 169.7 0.006 464 0.000 109 0.000 290 0.000 005 0.282 018 0.000 016 -26.7 -23.0 0.282 017 1 703 2 667 -0.99 12.1 173.4 0.000 313 0.000 002 0.000 011 0.000 000 0.282 489 0.000 017 -10.0 -6.2 0.282 489 1 050 1 611 -1.00 TW04 1.1 152.7 0.013 469 0.000 117 0.000 590 0.000 005 0.281 864 0.000 022 -32.1 -28.8 0.281 862 1 928 3 020 -0.98 2.1 156.7 0.010 746 0.000 323 0.000 470 0.000 015 0.281 846 0.000 022 -32.7 -29.4 0.281 845 1 945 3 055 -0.99 3.1 161.8 0.015 444 0.000 856 0.000 630 0.000 032 0.281 620 0.000 046 -40.7 -37.3 0.281 618 2 262 3 550 -0.98 4.1 154.9 0.045 262 0.000 987 0.001 736 0.000 034 0.281 978 0.000 026 -28.1 -24.8 0.281 973 1 825 2 771 -0.95 5.1 128.3 0.012 131 0.000 519 0.000 501 0.000 020 0.281 791 0.000 028 -34.7 -31.9 0.281 790 2 022 3 194 -0.98 6.1 147.8 0.032 460 0.000 313 0.001 340 0.000 013 0.281 854 0.000 027 -32.5 -29.3 0.281 851 1 979 3 047 -0.96 7.1 159.8 0.009 792 0.001 092 0.000 416 0.000 043 0.281 603 0.000 046 -41.3 -37.9 0.281 602 2 272 3 587 -0.99 8.1 162.4 0.020 947 0.000 295 0.000 912 0.000 012 0.281 771 0.000 033 -35.4 -32.0 0.281 768 2 072 3 221 -0.97 9.1 158.2 0.039 206 0.000 207 0.001 478 0.000 007 0.281 753 0.000 024 -36.0 -32.7 0.281 749 2 127 3 264 -0.96 10.1 159.2 0.029 421 0.000 555 0.001 151 0.000 020 0.281 604 0.000 022 -41.3 -37.9 0.281 601 2 314 3 588 -0.97 11.1 155.7 0.039 673 0.000 285 0.001 589 0.000 009 0.281 757 0.000 038 -35.9 -32.6 0.281 752 2 128 3 258 -0.95 注：锆石Hf同位素计算参数：衰变常数176Lu=1.867×10-11 a-1( Söderlund et al., 2004 )；球粒陨石176Hf/177Hf=0.282 772，176Lu/177Hf=0.033 2 (Blichert-Toft and Albarède, 1997)；亏损地幔176Hf/177Hf=0.283 25，176Lu/177Hf=0.038 42；fLu/Hf(CC)= -0.548 33，fLu/Hf(DM)=0.156 88 (Griffin et al., 2002 ).
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表 6 辽东半岛五龙岩体黑云母二长花岗岩Rb⁃Sr、Sm⁃Nd同位素测试结果
Table 6. Rb-Sr, Sm-Nd isotopic compositions of the biotite monzonitic granites obtained from the Wulong pluton of the Liaodong Peninsula
样品号 t(Ma) 87Rb/86Sr 87Sr/86Sr 2σ (87Sr/86Sr)i εSr(t) 147Sm/ 144Nd 143Nd/ 144Nd 2σ (143Nd/ 144Nd)i εNd(0) εNd(t) fSm/Nd tDM2(Ga) TW01-1 162 0.396 167 0.718 482 0.000 008 0.717 570 188.3 0.089 435 0.511 315 0.000 008 0.511 220 -25.8 -23.6 -0.55 2.78 TW01-2 162 0.412 525 0.718 422 0.000 007 0.717 472 186.9 0.087 288 0.511 310 0.000 007 0.511 217 -25.9 -23.7 -0.56 2.78 TW01-3 162 0.388 011 0.718 967 0.000 006 0.718 073 195.4 0.087 377 0.511 331 0.000 006 0.511 238 -25.5 -23.3 -0.56 2.75 TW01-4 162 0.390 542 0.717 755 0.000 008 0.716 856 178.1 0.085 275 0.511 303 0.000 008 0.511 213 -26.0 -23.8 -0.57 2.78 注：仪器标样分析结果：NBS987 87Sr/86Sr=0.710 276±0.000 010；JNdi⁃1 143Nd/144Nd=0.512 115±0.000 009.
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表 7 辽东半岛五龙岩体黑云母二长花岗岩Pb同位素测试结果
Table 7. Pb isotopic compositions of the biotite monzonitic granites obtained from the Wulong pluton of the Liaodong Peninsula
样品号 t(Ma) Pb Th U 208Pb/204Pb 207Pb/204Pb 206Pb/204Pb (208Pb/204Pb)i (207Pb/204Pb)i (206Pb/204Pb)i TW01-1 162 35.51 12.66 0.91 38.462 15.601 17.481 38.279 15.599 17.441 TW01-2 162 37.31 8.91 1.13 38.474 15.603 17.460 38.351 15.601 17.412 TW01-3 162 35.93 10.32 1.22 38.516 15.618 17.529 38.369 15.615 17.476 TW01-4 162 35.69 10.29 1.35 38.496 15.610 17.449 38.348 15.607 17.390 注：Pb同位素计算相关参数：λ232Th=4.947 5×10-11, λ235U=9.848 5×10-10, λ238U=1.551 3×10-10, 232Th/204Pb=63.782 6, 235U/204Pb=0.447 9, 238U/204Pb=61.726 0 (Steiger and Jager, 1977).
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