Age and geochemical features of the Early Devonian Xiangquan A-type syenogranites from Baoji area at the conjunction of Qinling and Qilian Orogen and their tectonic significance
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摘要:
对秦祁结合部位宝鸡地区香泉正长花岗岩进行了LA-ICP-MS锆石U-Pb年龄和岩石地球化学研究。结果显示，锆石206Pb/238Pb年龄加权平均值为410±5Ma（MSWD=0.20，n=18），限定该岩体的形成时代为早泥盆世。香泉正长花岗岩具有高硅（SiO2=69.63%~73.94%）、富钾（K2O=4.24%~4.88%，K2O/Na2O=1.23~1.44）、富铁（TFe2O3=2.10%~3.70%，TFe2O3/MgO=3.88~6.84）、低镁（MgO=0.31%~0.94%）、低磷（P2O5=0.08%~0.21%）的特征，属准铝质、高钾钙碱性系列。香泉正长花岗岩稀土元素含量较高（318×10-6~499×10-6），表现出明显的负Eu异常（δEu=0.37~0.46），富集Rb、Th、Zr、Sm、Ga（10000×Ga/Al=2.59~2.93）等微量元素，贫Ba、Nb、Ta、Sr，整体表现出A型花岗岩特征。结合区域资料认为，香泉正长花岗岩形成于造山后环境，为低压环境下长英质地壳物质部分熔融成因。
Abstract:Xiangquan syengranites are located in Baoji area at the conjunction of Qinling and Qilian Orogen, and their LA-ICPMS zircon U-Pb geochronological and petrogeochemical studies were conducted in this paper. The results show that the zircon 206Pb/238Pb weighted average age of Xiangquan syengranites is 410±5Ma (MSWD=0.20, n=18), indicating that the crystallization age of the syengranites is Early Devonian. Xiangquan syengranites are high in SiO2 (SiO2=69.63%~73.94%), K2O (K2O=4.24%~4.88%, K2O/Na2O=1.23~1.44), and TFe2O3 (TFe2O3=2.10%~3.70%, TFe2O3/MgO=3.88~6.84), but low in MgO (MgO=0.31%~0.94%) and P2O5(P2O5=0.08%~0.21%), belonging to high-K calc-alkaline series with metaluminous features. In addition, they are enriched in total REE (318×10-6~499×10-6), with obvious negative Eu anomaly (δEu=0.37~0.46). The trace elements show enrichement of Rb, Th, Zr, Sm and Ga (10000×Ga/Al=2.59~2.93), depletion of Ba, Nb, Ta and Sr, with the characteristics of A-type granites on the whole. Combined with regional data, the authors hold that the Xiangquan syenogranites were formed in a post-orogenic tectonic setting and derived from partially melted felsic crust under low pressures.
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表 1 香泉正长花岗岩（样品XQ-1）LA-ICP-MS锆石U-Th-Pb同位素分析结果
Table 1. LA-ICP-MS zircon U-Th-Pb isotopic analytical data of Xiangquan syenogranites(sample XQ-1)
测点编号 206Pb 232Th 238U Th/U 206Pb/238U 207Pb/235U 207Pb/206Pb 206Pb/238U 207Pb/235U 207Pb/206Pb 谐和度/% 10-6 比值 1σ 比值 1σ 比值 1σ 年龄/Ma 1σ 年龄/Ma 1σ 年龄/Ma 1σ 1 64 88 218 0.41 0.0697 0.0018 0.5331 0.016 0.0556 0.0015 434 10 434 11 437 58 100 2 343 199 1164 0.17 0.0699 0.0017 0.5341 0.013 0.0556 0.0012 435 9 436 10 435 45 100 3 150 314 520 0.60 0.0686 0.0017 0.8058 0.020 0.0854 0.0018 600 11 428 10 1325 40 71 4 131 162 450 0.36 0.0691 0.0017 0.5270 0.013 0.0555 0.0012 430 9 431 10 431 47 100 5 32 270 118 2.30 0.0646 0.0017 0.4873 0.018 0.0549 0.0020 403 12 403 10 407 77 100 6 28 218 103 2.12 0.0649 0.0017 0.4928 0.019 0.0552 0.0020 407 13 405 10 421 79 100 7 551 1159 1854 0.62 0.0707 0.0017 0.5510 0.013 0.0567 0.0011 446 9 440 10 478 44 99 8 75 609 257 2.37 0.0698 0.0017 0.6227 0.017 0.0649 0.0015 492 10 435 10 770 48 88 9 59 331 212 1.56 0.0663 0.0017 0.5033 0.014 0.0551 0.0014 414 9 414 10 418 53 100 10 242 717 819 0.88 0.0704 0.0017 0.8202 0.020 0.0846 0.0018 608 11 439 10 1307 40 72 11 29 148 100 1.48 0.0703 0.0018 0.5367 0.018 0.0555 0.0017 436 12 438 11 431 67 100 12 56 382 190 2.02 0.0705 0.0018 1.0402 0.027 0.1073 0.0024 724 13 439 11 1754 40 61 13 95 201 344 0.59 0.0663 0.0017 0.5028 0.013 0.0551 0.0013 414 9 414 10 418 50 100 14 200 774 722 1.07 0.0662 0.0016 0.5116 0.013 0.0562 0.0012 420 9 413 10 459 46 98 15 41 387 149 2.59 0.0656 0.0017 0.4935 0.015 0.0546 0.0015 407 10 410 10 397 60 101 16 109 491 387 1.27 0.0673 0.0017 0.5108 0.014 0.0552 0.0013 419 9 420 10 418 52 100 17 30 147 110 1.33 0.0655 0.0017 0.4933 0.017 0.0547 0.0018 407 12 409 10 401 71 100 18 32 242 115 2.10 0.0659 0.0017 0.4997 0.016 0.0551 0.0016 412 11 411 10 416 64 100 19 225 289 813 0.36 0.0664 0.0016 0.5038 0.013 0.0551 0.0012 414 9 414 10 418 46 100 20 24 184 88 2.08 0.0663 0.0019 0.5000 0.026 0.0548 0.0029 412 18 414 12 403 113 101 21 292 1064 1081 0.98 0.0651 0.0016 0.4955 0.013 0.0553 0.0013 409 9 406 10 424 50 99 22 26 203 95 2.14 0.0666 0.0017 0.7339 0.022 0.0800 0.0022 559 13 415 10 1198 52 74 23 52 367 173 2.12 0.0725 0.0018 0.5612 0.016 0.0562 0.0014 452 10 451 11 459 56 100 24 45 258 166 1.55 0.0649 0.0016 0.4894 0.015 0.0547 0.0015 405 10 406 10 401 59 100 25 39 219 136 1.61 0.0689 0.0017 0.6952 0.020 0.0733 0.0019 536 12 429 11 1022 51 80 26 39 206 143 1.44 0.0653 0.0017 0.4937 0.015 0.0548 0.0016 407 10 408 10 405 63 100 27 41 320 149 2.15 0.0661 0.0017 0.4998 0.016 0.0548 0.0016 412 11 413 10 405 63 100 28 41 206 152 1.36 0.0656 0.0017 0.4942 0.017 0.0547 0.0018 408 12 409 10 400 72 100 29 53 297 192 1.54 0.0667 0.0018 0.5045 0.018 0.0549 0.0019 415 12 416 11 409 73 100 30 65 344 245 1.41 0.0646 0.0016 0.4889 0.014 0.0549 0.0015 404 10 403 10 410 58 100 
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表 2 香泉正长花岗岩主量元素分析结果
Table 2. Major elements analytical data of Xiangquan syenogranites
% 样品号 SiO2 TiO2 Al2O3 TFe2O3 MnO MgO CaO Na2O K2O P2O5 烧失量 总量 XQ-1 71.16 0.28 13.94 2.88 0.07 0.50 1.53 3.56 4.77 0.11 1.42 100.22 XQ-2 71.35 0.28 13.83 2.70 0.07 0.43 1.51 3.50 4.80 0.10 1.29 99.86 XQ-3 72.15 0.27 13.83 2.59 0.07 0.41 1.28 3.35 4.77 0.09 1.16 99.97 XQ-4 73.02 0.22 13.40 2.31 0.06 0.30 1.43 3.35 4.58 0.09 1.05 99.81 XQ-5 72.92 0.23 13.62 2.43 0.06 0.40 1.49 3.42 4.19 0.08 1.26 100.10 XQ-6 69.38 0.61 13.86 4.06 0.09 0.93 1.94 3.47 4.31 0.21 1.30 100.15 XQ-7 68.68 0.52 14.67 3.58 0.08 0.83 1.95 3.34 4.81 0.17 1.32 99.95
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表 3 香泉正长花岗岩稀土、微量元素分析结果
Table 3. Rare earth and trace element analytical data of Xiangquan syenogranites
10-6 样品号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Ba Rb Ga Ni XQ-1 82.8 170 18.6 57.7 8.88 1.04 7.48 1.17 5.84 1.10 3.49 0.54 3.36 0.56 775 211 20.5 5.28 XQ-2 93.3 192 20.9 64.9 9.91 1.16 8.31 1.35 6.76 1.31 4.03 0.64 4.10 0.65 844 228 21.0 4.35 XQ-3 88.9 181 19.8 61.6 9.28 1.06 7.75 1.24 6.19 1.20 3.64 0.57 3.79 0.62 772 218 20.6 5.08 XQ-4 73.6 148 16.3 51.7 8.28 1.04 7.12 1.20 6.33 1.20 3.65 0.57 3.69 0.57 713 204 20.9 4.05 XQ-5 71.4 144 16.0 50.3 8.10 0.96 7.08 1.31 7.30 1.40 4.29 0.68 4.35 0.66 671 184 21.4 4.86 XQ-6 110 233 26.1 83.3 12.5 1.73 10.6 1.61 8.14 1.56 4.71 0.69 4.54 0.71 1098 183 21.3 7.13 XQ-7 96.2 201 21.9 69.9 10.7 1.49 8.80 1.36 6.82 1.32 4.02 0.61 3.92 0.65 1159 180 20.4 7.17 样品号 Cr Hf Sc Ta Co U Pb Cs Zr Nb Th Sr Y δEu δCe （La/Yb）N （La/Sm）N （Gd/Yb）N XQ-1 8.72 5.93 3.79 3.43 5.50 4.77 28.6 1.41 222 27.8 48.4 198 34.6 0.38 1.00 16.61 5.87 1.80 XQ-2 9.56 6.05 4.17 3.76 4.81 8.01 31.4 1.65 228 30.6 44.7 205 40.5 0.38 1.01 15.34 5.92 1.64 XQ-3 43.7 6.34 3.65 3.90 3.19 4.18 26.2 1.66 231 29.3 45.7 206 36.5 0.37 1.00 15.81 6.03 1.65 XQ-4 8.99 6.08 3.27 3.70 3.24 4.75 34.2 1.69 198 28.8 38.8 212 36.0 0.40 0.99 13.45 5.59 1.56 XQ-5 9.50 5.72 3.13 2.15 3.80 5.30 42.4 1.56 193 28.9 35.8 223 42.5 0.38 0.99 11.07 5.54 1.31 XQ-6 9.94 3.28 6.06 4.12 5.53 3.15 28.0 1.91 295 34.3 31.0 367 47.0 0.45 1.01 16.34 5.54 1.88 XQ-7 15.3 3.76 5.67 4.16 5.94 3.92 87.9 2.20 287 32.0 35.6 355 40.3 0.46 1.02 16.55 5.66 1.81
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[1] 王涛.花岗岩混合成因研究及大陆动力学意义[J].岩石学报, 2000, 16(2): 161-168. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200002002.htm
[2] 肖庆辉, 邢作云, 张星, 等.当代花岗岩研究的几个重要前沿[J].地学前缘, 2003, 10(3): 222-229. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY200303032.htm
[3] 张宏飞, 靳兰兰, 张利, 等.西秦岭花岗岩类地球化学和Pb-SrNd同位素组成对基底性质及其构造属性的限制[J].中国科学(D辑), 2005, 35(10): 914-926. doi: 10.3969/j.issn.1674-7240.2005.10.002
[4] 张成立, 王涛, 王晓霞.秦岭造山带早中生代花岗岩成因及其构造环境[J].高校地质学报, 2008, 14(3): 304-316. http://www.cnki.com.cn/Article/CJFDTOTAL-GXDX200803006.htm
[5] Zhang H F, Zhang B R, Nigel Harris, et al. U-Pb zircon HRIMP ages, geochemical and Sr-Nd-Pb isotopic compositions of intrusive rocks from the Longshan-Tianshui area in the southeast corner of the Qilianorogenic belt, China: Constraints on petrogenesis and tectonicaffinity[J]. Journal of Asian Earth Sciences, 2006, 27: 751-764. doi: 10.1016/j.jseaes.2005.07.008
[6] 卢欣祥, 尉向东, 肖庆辉.秦岭环斑花岗岩的年代学研究及其意义[J].高校地质学报, 1999, 5(4): 372-377. http://www.cnki.com.cn/Article/CJFDTOTAL-GXDX199904001.htm
[7] 王洪亮, 何世平, 陈隽璐, 等.北秦岭西段红花铺俯冲性侵入岩LA-ICP-MS定年及其地质意义[J].现代地质, 2006, 20(4): 536-564. http://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ200604002.htm
[8] 裴先治, 孙仁奇, 丁仨平, 等.陇东地区阎家店闪长岩LA-ICP-MS锆石U-Pb测年及其地质意义[J].中国地质, 2007, 34(1): 8-16. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200701001.htm
[9] 裴先治, 刘战庆, 丁仨平, 等.甘肃天水地区百花岩浆杂岩的锆石LA-ICP-MS U-Pb定年及其地质意义[J].地球科学进展, 2007, 22(8): 818-827. http://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ200708006.htm
[10] 裴先治, 丁仨平, 张国伟, 等.西秦岭北缘新元古代花岗质片麻岩的LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质学报, 2007, 81(6): 773-784. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200706004.htm
[11] 何世平, 王洪亮, 徐学义, 等.北祁连东段红土堡基性火山岩锆石LA-ICP-MS U-Pb年代学及其地质意义[J].地球科学进展, 2007, 22(2): 143-151. http://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ200702003.htm
[12] 陈隽璐, 李好斌, 王洪亮, 等.秦祁结合部位王家岔石英闪长岩体锆石LA-ICP-MS定年及地质意义[J].吉林大学学报(地球科学版), 2007, 37(3): 423-431. http://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ200703001.htm
[13] 陈隽璐, 徐学义, 王洪亮, 等.北秦岭西段唐藏石英闪长岩岩体的形成时代及其地质意义[J].现代地质, 2008, 22(1): 63-70. http://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ200801007.htm
[14] 王婧, 张宏飞, 徐旺春, 等.西秦岭党川地区花岗岩的成因及其构造意义[J].地球科学-中国地质大学学报, 2008, 33(4): 474-486. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200804006.htm
[15] 刘树文, 杨朋涛, 李秋根, 等.秦岭中段印支期花岗质岩浆作用与造山过程[J].吉林大学学报(地球科学版), 2011, 41(6): 1928-1943. http://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ201106022.htm
[16] 王银川, 裴先治, 李佐臣, 等.北祁连造山带东端张家川地区长宁驿中元古代花岗质片麻岩LA-ICP-MS锆石U-Pb年龄及其构造意义[J].地质通报, 2012, 31(10): 1576-1587. doi: 10.3969/j.issn.1671-2552.2012.10.004 http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201210007.htm
[17] 王银川. 秦祁结合部位加里东期碰撞-后碰撞型花岗岩地质特征及构造意义[D]. 长安大学硕士学位论文, 2013: 1-86.
http://cdmd.cnki.com.cn/Article/CDMD-11941-1014022221.htm [18] 魏方辉, 裴先治, 李瑞保, 等.甘肃天水地区早古生代黄门川花岗闪长岩体LA-ICP-MS锆石定年及构造意义[J].地质通报, 2012, 31(9): 1496-1509. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201209013.htm
[19] 魏方辉. 北祁连造山带东端早古生代物质组成、变形特征及其构造演化过程[D]. 长安大学硕士学位论文, 2013: 1-130.
http://cdmd.cnki.com.cn/Article/CDMD-11941-1014022227.htm [20] 李佐臣, 裴先治, 李瑞保, 等.西秦岭糜署岭花岗岩体年代学、地球化学特征及其构造意义[J].岩石学报, 2013, 29(8): 2617-2634. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201308001.htm
[21] 任厚州, 裴先治, 刘成军, 等.西秦岭天水地区太白花岗岩体LA-ICP-MS锆石U-Pb年龄、地球化学特征及其地质意义[J].地质通报, 2014, 33(7): 1041-1054. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201407011.htm
[22] 吕星球. 北秦岭太白花岗岩体年代学和成因研究[D]. 中国地质大学(北京)硕士学位论文, 2015: 1-78.
http://cdmd.cnki.com.cn/Article/CDMD-11415-1015385448.htm [23] Wu Y B, Zheng Y F. Genesis of zircon and its constraints on interpretation of U-Pb age[J]. Chinese Science Bulletin, 2004, 49(15): 1554-1569. doi: 10.1007/BF03184122
[24] Siebel W, Blaha U, Chen F K, et al. Geochronology and geochemistry of a dyke-host rock association and implications for the formation of the Bavarian Pfahl shear zone, Bohemian Massif[J]. International Journal of Earth Sciences, 2005, 94(1): 8-23. doi: 10.1007/s00531-004-0445-0
[25] Le Maitre R W, Bateman P, Dudek A, et al. A Classification of igneous rocks and glossary of terms[M]. Oxford: Blackwell, 1989.
[26] Rickwood P C. Boundary lines within petologic diagrams which use oxides of major and minor element[J]. Lithos, 1989, 22(4): 247-263. doi: 10.1016/0024-4937(89)90028-5
[27] Sun S S, McDonough W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes [C]// Sunders A D, Norry M J. Magmatism in the Ocean Basins. London: Geol. Soc. Spec. Publ., 1989, 42: 313-345.
[28] Whalen J B, Currie K L, Chappell B W. A-type granites: Geochemical characteristics, discrimination and petrogenesis[J]. Contributions to Mineralogy and Petrology, 1987, 95: 407-419. doi: 10.1007/BF00402202
[29] 贾小辉, 王强, 唐功建. A型花岗岩的研究进展及意义[J].大地构造与成矿学, 2009, 33(3): 465-480. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK200903020.htm
[30] 王强, 赵振华, 熊小林.桐柏-大别造山带燕山晚期A型花岗岩的厘定[J].岩石矿物学杂志, 2000, 19(4): 297-306. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW200004001.htm
[31] Turner S P, Foden J D, Morrison R S. Derivation of some A-type magmas by fractionation of basaltic magma: An example from the Padthaway Ridge, South Australia[J]. Lithos, 1992, 28: 151-179. doi: 10.1016/0024-4937(92)90029-X
[32] Mushkin A, Navon O, Halicz L, et al. The petrogenesis of A-type magmas from the Amram Massif, southern Israel[J]. Journal of Petrology, 2003, 44: 815-832. doi: 10.1093/petrology/44.5.815
[33] Clemens J D, Holloway J R, White A J R. Origin of an A-type granite: Experimental constrains[J]. American Mineralogist, 1986, 71: 317-324. https://www.researchgate.net/publication/279898234_Origin_of_an_A-type_granite_experimental_constraints
[34] Harris C, Marsh J S, Milner S C. Petrology of the alkaline core of the essum igneous complex, Namibia: Evidence for the progressively decreasing effect of crustal contamination[J]. Journal of Petrology, 1999, 40: 1377-1397. doi: 10.1093/petroj/40.9.1377
[35] Yang J H, Wu F Y, Chung S L, et al. A hybrid origin for the Qianshan A-type granite, northeast China: Geochemical and Sr-NdHf isotopic evidence[J]. Lithos, 2006, 89: 89-106. doi: 10.1016/j.lithos.2005.10.002
[36] Skjerlie K P, Johnston A D. Vapor-absent melting at 10 kbar of a biotite-and amphibole-bearing tonalitic gneiss: Implications for the generation of A-type granites[J]. Geology, 1992, 20: 263-266. doi: 10.1130/0091-7613(1992)020<0263:VAMAKO>2.3.CO;2
[37] Patiño Douce A E. Generation of metaluminous A-type granites by low-pressure melting of calc-alkaline granitoids[J]. Geology, 1997, 25: 743-746. doi: 10.1130/0091-7613(1997)025<0743:GOMATG>2.3.CO;2
[38] Creaser R A, Price R C, Wormald R J. A-type granites revisited: Assessment of a residual-source model[J]. Geology, 1991, 19: 163-166. doi: 10.1130/0091-7613(1991)019<0163:ATGRAO>2.3.CO;2
[39] King P L, White A J R, Chappell B W, et al. Characterization and origin of aluminous A-type granites from the Lachlan fold belt, southeastern Australia[J]. Journal of Petrology, 1997, 38(3): 371-391. doi: 10.1093/petroj/38.3.371
[40] 吴福元, 李献华, 杨进辉, 等.花岗岩成因研究的若干问题[J].岩石学报, 2007, 23(6): 1217-1238. http://www.cnki.com.cn/Article/CJFDTOTAL-HBDK199001002.htm
[41] Rapp R P, Watson E B. Dehydration melting of metabasalt at 8~32 kbar: Implications for continental growth and crust-mantle recycling[J]. Journal of Petrology, 1995, 36: 891-931. doi: 10.1093/petrology/36.4.891
[42] Gao S, Rudnick R L, Yuan H L, et al. Recycling lower continental crust in the North China craton[J]. Nature, 2004, 432: 892-897 doi: 10.1038/nature03162
[43] Whalen J B, Jenner G A, Longstaffe F J, et al. Geochemical and isotopic (O, Nd, Pb and Sr) constraints on A-type granite: Petrogenesis based on the Topsails igneous suite, Newfound land Appalachians[J]. Journal of Petrology, 1996, 37: 1463-1489. doi: 10.1093/petrology/37.6.1463
[44] Eby G N. Chemical subdivision of the A-type granitoids: Petrogenetic and tectonic implications[J]. Geology, 1992, 20: 641-644. doi: 10.1130/0091-7613(1992)020<0641:CSOTAT>2.3.CO;2
[45] Pearce J A. Sources and settings of granitic rock[J]. Episodes, 1996, 19(4): 120-125. https://www.researchgate.net/publication/262099137_Sources_and_settings_of_granitic_rocks
[46] 裴先治, 丁仨平, 李佐臣, 等.西秦岭北缘关子镇蛇绿岩的形成时代:来自辉长岩中LA-ICP-MS锆石U-Pb年龄的证据[J].地质学报, 2007, 81(11): 1550-1561. doi: 10.3321/j.issn:0001-5717.2007.11.010
[47] 董云鹏, 杨钊, 张国伟, 等.西秦岭关子镇蛇绿岩地球化学及其大地构造意义[J].地质学报, 2008, 82(9): 1186-1194. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200809004.htm
[48] 裴先治, 刘会彬, 丁仨平, 等.西秦岭天水地区李子园群变质火山岩的地球化学特征及其地质意义[J].大地构造与成矿学, 2006, 30(2): 193-205. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK200602010.htm
[49] 闫全人, 王宗起, 陈隽璐, 等.北秦岭斜峪关群和草滩沟群火山岩成因的地球化学和同位素约束、SHRIMP年代及其意义[J].地质学报, 2007, 81(4): 488-500. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200704006.htm
[50] 闫全人, 陈隽璐, 王宗起, 等.北秦岭小王涧枕状熔岩中淡色侵入岩的地球化学特征、SHRIMP年龄及地质意义[J].中国科学(D辑), 2007, 37(10): 1301-1313. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200710005.htm
[51] 李王晔. 西秦岭-东昆仑造山带蛇绿岩及岛弧型岩浆岩的年代学和地球化学研究——对特提斯洋演化的制约[D]. 中国科学技术大学博士学位论文, 2008: 1-124.
http://cdmd.cnki.com.cn/Article/CDMD-10358-2008091811.htm [52] Pei X Z, Li Z C, Liu H B, et al. Geochemical characteristics and zircon U-Pb isotopic ages of island-arc basic igneous complexes from the Tianshui area in West Qinling[J]. Front. Earth Sci. China, 2007, 1(1): 49-59. doi: 10.1007/s11707-007-0008-3
[53] 胡波. 甘肃天水地区清水-张家川早古生代变质火山岩岩石地球化学特征及其构造意义[D]. 长安大学硕士学位论文, 2005: 1-75.
http://cdmd.cnki.com.cn/article/cdmd-11941-2006030053.htm [54] 何艳红, 陈亮, 孙勇, 等.陇县地区新街片麻岩套锆石年龄及其地质意义[J].西北大学学报(自然科学版), 2005, 35(5): 625-632. http://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ200505030.htm
① 长安大学地质调查研究院. 1: 25万天水市幅区域地质调查(修测)报告. 2004.
② 陕西省地质调查院. 1: 25万宝鸡市幅区域地质调查(修测)报告. 2004.
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