Geochronological and geochemical characteristics of rhyolite in the Manketou'ebo Formation of Dong Ujimqin Banner, Inner Mongolia, and its geological implications
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摘要:
为确定内蒙古东乌旗地区满克头鄂博组火山岩地层的时代归属和形成构造背景，对满克头鄂博组流纹岩进行了年代学、地球化学特征等研究。流纹岩的LA-ICP-MS锆石U-Pb年龄为150.9±4.2Ma，时代归属晚侏罗世。满克头鄂博组流纹岩属于高钾钙碱性系列岩石，且具有高硅、富碱、高铝、贫钙贫镁的特征。稀土元素总量变化较大，配分曲线右倾，具有负Eu异常；富集大离子亲石元素（LILE）Rb、K、Th和轻稀土元素，亏损Sr和Nb、Ti、P；基性相容元素Cr、Co、Ni和Mg#值较低，岩浆来源于下地壳岩石的部分熔融。根据元素地球化学特征，流纹岩具有A型花岗岩特征，结合相关构造判别图解，表明东乌旗地区在晚侏罗世处于伸展构造环境，可能与蒙古-鄂霍茨克洋闭合造山后伸展作用体制有关。
Abstract:In order to determine the age attribution and tectonic setting of the volcanic strata of the Manketou'ebo Formation in Dong Ujimqin Banner of Inner Mongolia, the authors studied the geochronological and geochemical characteristics of the rhyolite from the Manketou'ebo Formation. The weighted age of rhyolite by LA-ICP-MS zircon U-Pb dating is 150.9±4.2Ma, suggesting Late Jurassic. The rhyolite in the Manketou'ebo Formation belongs to the high-potassic calc-alkaline series of rocks and is characterized by high silicon, rich alkali, high aluminum, low calcium and depleted magnesium. The total amount of rare earth elements changes greatly, the distribution curve is right-inclined, and there is negative anomaly of Eu. The rocks are enriched in large ion lithophile elements of Rb, K, Th, and LREE, and simultaneously depleted in elements of Sr, Nb, Ti and P. The basic compatible elements Cr, Co, Ni and Mg# are relatively low, and the magma was derived from the partial melting of the lower crust rocks. According to element geochemical characteristics, rhyolite has A-type granite characteristics. Combined with the related structural discriminant diagrams, the authors hold that the Dong Ujimqin Banner area was in an extensional tectonic setting in the Late Jurassic, and may be related to the extensional system of the Mongolian-Okhotsk Ocean after the closure of the ocean.
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表 1 满克头鄂博组流纹岩（TW3616-1）LA-ICP-MS锆石U-Th-Pb测年结果
Table 1. LA-ICP-MS zircon U-Th-Pb analyses of rhyolite(TW3616-1)in the Manketou'ebo Formation
点号 206Pbc/% 含量/10-6 232Th/238U 207Pb*/206Pb 207Pb*/235U 206Pb*/238U 206Pb/238U
年龄/Ma207Pb/206Pb
年龄/MaU Th 206Pb* 比值 ±% 比值 ±% 比值 ±% 1.1 8.01 77 54 1.75 0.73 0.078 24 0.262 24 0.02454 2.9 156.3±4.4 1, 136±480 2.1 2.96 291 110 11.6 0.39 0.054 19 0.336 19 0.04518 2.1 284.9±6.0 369±420 3.1 6.05 53 33 2.46 0.63 0.073 27 0.50 27 0.0503 2.9 316.4±9.0 1, 006±540 4.1 0.89 2658 1606 53.9 0.62 0.0473 3.6 0.153 3.6 0.02339 0.46 149.01±0.7 64± 86 5.1 2.30 526 261 10.6 0.51 0.0489 11 0.155 11 0.02294 1.1 146.2±1.5 143±270 6.1 1.22 1697 688 34.5 0.42 0.0467 5.8 0.151 5.8 0.02339 0.73 149.0±1.1 34±140 7.1 1.20 490 342 22.8 0.72 0.0546 9.6 0.403 9.7 0.05353 0.83 336.2±2.7 397±220 8.1 0.57 2349 1010 51.0 0.44 0.0498 2.6 0.173 3.1 0.02512 1.6 159.9±2.5 187± 61 9.1 1.23 771 358 35.6 0.48 0.0515 4.8 0.378 4.8 0.05316 0.72 333.9±2.3 264±110 10.1 1.86 1122 409 24.0 0.38 0.0491 11 0.165 11 0.02442 1.1 155.5±1.7 153±260 11.1 9.95 90 51 2.03 0.59 0.129 19 0.420 19 0.02370 3.4 151.0±5.1 2, 078±340 12.1 0.20 1538 589 32.6 0.40 0.0583 2.6 0.198 2.6 0.02461 0.57 156.75±0.9 542± 56 13.1 3.15 212 97 3.91 0.47 0.0596 15 0.171 15 0.02077 1.9 132.5±2.4 589±320 注：206Pbc和206Pb*分别表示普通Pb和放射性成因Pb；普通Pb根据实测204Pb进行矫正，误差为1σ 
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表 2 满克头鄂博组流纹岩主量、微量和稀土元素组成及化学参数
Table 2. Major elements, trace elements and REE composition and chemical parameters of rhyolites in the Manketou'ebo Formation
样号 GS780# GS781# GS782# GS3616 GS3183 PM6XT9 SiO2 75.4 75.92 73.36 76.71 75.34 75.51 TiO2 0.23 0.25 0.3 0.11 0.04 0.17 Al2O3 11.82 12.12 13.44 12.18 12.74 12.01 Fe2O3 0.98 0.68 2.01 0.63 0.88 1.64 FeO 0.31 0.12 0.19 0.65 0.23 0.22 MnO 0.016 0.012 0.022 0.04 0.04 0.02 MgO 0.34 0.46 0.17 0.21 0.27 0.2 CaO 0.32 0.32 0.48 0.36 0.46 0.82 Na2O 3.88 3.52 3.79 3.66 3.6 3.16 K2O 5.2 4.83 4.75 5.04 5.47 4.81 P2O5 0.05 0.03 0.07 0.03 0.04 0.04 烧失量 1.12 1.12 0.88 1.28 1.04 0.57 总计 99.67 99.38 99.46 100.9 100.15 99.17 K2O/Na2O 1.34 1.37 1.25 1.38 1.52 1.52 TFeO/MgO 3.51 1.59 11.76 5.79 3.78 8.48 A/CNK 0.94 1.04 1.1 0.99 1 1.01 Mg# 0.34 0.53 0.13 0.24 0.32 0.17 σ 2.53 2.11 2.39 2.09 2.21 1.95 DI 96.26 95.69 93.49 96 95.71 93.15 La 42.9 37.5 36.5 24.9 19.7 60.3 Ce 88.5 79.1 66.2 40 38 131.4 Pr 11.3 9.05 7.73 5.86 5.02 17.1 Nd 44.2 33.7 27.1 19 18.4 60.4 Sm 9.23 6.57 4.78 3.08 3.63 11.3 Eu 0.54 0.56 1.15 0.49 0.5 0.28 Gd 7.61 5.45 4.28 2.63 3.2 9.4 Tb 1.2 0.84 0.71 0.41 0.5 1.58 Dy 6.52 4.76 4.13 2.34 2.7 8.4 Ho 1.24 0.94 0.85 0.45 0.49 1.51 Er 3.8 2.69 2.63 1.33 1.45 4.45 Tm 0.62 0.48 0.48 0.23 0.23 0.69 Yb 3.93 3.08 3.17 1.5 1.46 4.4 Lu 0.67 0.53 0.56 0.24 0.23 0.6 Y 34.5 26.1 24.6 14.4 14.3 43.4 Cr 6.13 5.94 4.35 2.4 7 7.4 Ba 85 87 916 512 542.9 147 Nb 18.4 19 15.5 8.5 11 21.4 Rb 199 192 127 112 131.7 230.1 Sr 29 28 120 86 100.3 30.7 Co 5.2 4.4 5.3 0.8 4.3 6 Th 15.88 16.14 13.04 7.9 12.8 26.7 Zr 177 194 232 89 83.1 255 Ni 5.6 4.6 3.9 2 7.1 3.4 Ti 1380 1500 1800 660 240 1020 ∑REE 222.26 185.25 160.27 102.46 95.51 311.81 LREE 196.67 166.48 143.46 93.33 85.25 280.78 HREE 25.59 18.77 16.81 9.13 10.26 31.03 LR/HR 7.69 8.87 8.53 10.22 8.31 9.05 δEu 0.19 0.28 0.76 0.51 0.44 0.08 (La/Sm)N 2.26 2.92 3.59 4.8 5.09 3.41 (La/Yb)N 7.36 8.21 7.76 11.19 9.1 9.24 (Ce/Yb)N 4.29 5.82 6.64 5.4 6.9 6.73 注：主量元素测试单位为天津地质矿产研究所, 微量和稀土元素测试单位为中国地质科学院地球物理地球化学勘查研究所。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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[1] 尹志刚, 王文材, 张跃龙, 等.伊勒呼里山中生代火山岩锆石U-Pb年代学及其对岩浆事件的制约[J].吉林大学学报(地球科学版), 2016, 46(3):766-780. http://d.old.wanfangdata.com.cn/Periodical/cckjdxxb201603013
[2] 范蔚茗, 郭锋, 高晓峰, 等.东北地区中生代火成岩Sr-Nd同位素区划及其大地构造意义[J].地球化学, 2008, 37(4):361-372. doi: 10.3321/j.issn:0379-1726.2008.04.010
[3] 林强, 葛文春, 孙德有, 等.中国东北地区中生代火山岩的大地构造意义[J].地质科学, 1998, 33(2):129-139. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199800069875
[4] 葛文春, 林强, 孙德有, 等.大兴安岭中生代玄武岩的地球化学特征:壳-幔相互作用[J].岩石学报, 1999, 15(3):397-407. http://d.old.wanfangdata.com.cn/Periodical/ysxb98199903008
[5] 聂立军, 贾海明, 王聪, 等.大兴安岭中段白音高老组流纹岩年代学、地球化学及其地质意义[J].世界地质, 2015, 34(2):297-304. http://d.old.wanfangdata.com.cn/Periodical/sjdz201502004
[6] 王杰, 姚玉来, 丁秋红, 等.内蒙古扎鲁特旗地区晚侏罗世火山岩岩石学及地球化学特征[J].地质科技情报, 2014, 33(6):18-27. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzkjqb201406003
[7] 张晓晖, 张宏福, 汤艳杰, 等.内蒙古中部锡林浩特-西乌旗早三叠世A型酸性火山岩的地球化学特征及地质意义[J].岩石学报, 2006, 22(11):2770-2779. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=ysxb98200611015
[8] Liu Y S, Gao S, Hu Z C, et al. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen:U-Pb dating, Hf isotopes and trace elements in zircons of mantle xenoliths[J].Journal of Petrology, 2010, 51(1/2):537-571. http://d.old.wanfangdata.com.cn/NSTLQK/10.1093-petrology-egp082/
[9] Anderson T. Correction of common lead in U-Pb analyses that do not report 204Pb[J]. Chemical Geology, 2002, 192(1/2):59-79. doi: 10.1016/S0009-2541(02)00195-X
[10] 孙德有, 苟军, 任云生, 等.满洲里南部玛尼叶组火山岩锆石UPb年龄与地球化学研究[J].岩石学报, 2011, 27(10):3083-3094. http://www.cnki.com.cn/Article/CJFDTotal-YSXB201110024.htm
[11] Liu Y S, Hu Z C, Gao S, et al. In situ analysis of major and trace e1ements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology, 2008, 257(1/2):34-43.
[12] Liu Y S, Hu Z C, Zong K Q, et al. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J].Chinese Science Bulletin, 2010, 55(15):1535-1546. doi: 10.1007/s11434-010-3052-4
[13] Taylor S R, McLennan S M. The Continental Crust:its Composition and Evolution[M]. Oxford:Blackwell, 1985.
[14] Whalen J B. Geochemistry of an island-arc plutonic suite:the Uasilau-Yau Yau intrusive complex, New Britain, P.N.G.[J].J. Petrol., 1985, 26:603-632. doi: 10.1093/petrology/26.3.603
[15] Chapprll B W, White A J R. Two contrasting granite types[J]. Pacific Geology, 1974, 8:173-174. http://d.old.wanfangdata.com.cn/NSTLQK/NSTL_QKJJ027419645/
[16] Collins W J, Beams S D, White A J R, et al. Nature and origin of A-typegranites with particular reference to southeastern Australia[J]. Contributions to Mineralogy and Petrology, 1982, 80:189-200. doi: 10.1007/BF00374895
[17] Loiselle M, Wones D. Characteristics and origin of anorogenic[J]. Geological Society of American Abstracts & Programs 1979, 11:468.
[18] WhiteW M, Tapia M D M, Schilling J G. The petrology and geochemistry of the Azores Islands[J]. Contributions to Mineralogy & Petrology, 1979, 69(3):201-213. http://d.old.wanfangdata.com.cn/NSTLQK/10.1007-BF00372322/
[19] 葛文春, 林强, 孙德有, 等.大兴安岭中生代两类流纹岩成因的地球化学研究[J].地球科学, 2000, 25(2):172-178. http://d.old.wanfangdata.com.cn/Periodical/dqkx200002012
[20] 葛文春, 李献华, 林强, 等.呼伦湖早白垩世碱性流纹岩的地球化学特征及其意义[J].地质科学, 2001, 36(2):176-183. doi: 10.3321/j.issn:0563-5020.2001.02.005
[21] Tischendorf G, Paelchen W. Zur.Klassifikation von Granitoiden. gische Classification of granitoids[J].Zeitschrift fuer Geolo Wissens chaften, 1985, 13(5): 615-627.
[22] 邵济安, 赵国龙, 王忠, 等.大兴安岭中生代火山活动构造背景[J].地质论评, 1999, 45(S1):422-430. http://d.old.wanfangdata.com.cn/Conference/47057
[23] 张超, 杨伟红, 和钟铧, 等.大兴安岭中南段塔尔气地区满克头鄂博组流纹岩年代学和地球化学研究[J].世界地质, 2014, 33(2):256-265. http://d.old.wanfangdata.com.cn/Periodical/sjdz201402002
[24] 韩宝福.后碰撞花岗岩类的多样性及其构造环境判别的复杂性[J].地学前缘, 2007, 14(3):64-72. doi: 10.3321/j.issn:1005-2321.2007.03.006
[25] Bernard B. A-type granites and related rocks:Evolution of a concept, problems and prospects[J].Lithos, 2007, 97(1/2):1-29.
[26] 徐美君, 许文良, 孟恩, 等.内蒙古东北部额尔古纳地区上护林-向阳盆地中生代火山岩LA-ICP-MS锆石U-Pb年龄和地球化学特征[J].地质通报, 2011, 30(9):1321-1338. doi: 10.3969/j.issn.1671-2552.2011.09.001 http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20110901&flag=1
[27] 高龙飞, 和钟铧, 隋振民, 等.大兴安岭中段索伦地区满克头鄂博组火山岩年龄、地球化学特征及其构造环境[J].地质通报, 2018, 37(5):881-894. http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20180511&flag=1
[28] 樊航宇, 李明辰, 张全, 等.内蒙古西乌旗地区大石寨组火山岩时代及地球化学特征[J].地质通报, 2014, 33(9):1285-1292. http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20140903&flag=1
[29] 李鹏川, 李世超, 刘正宏, 等.内蒙古林西地区满克头鄂博组火山岩形成时代及构造环境[J].世界地质, 2016, 35(1):78-88. http://d.old.wanfangdata.com.cn/Periodical/sjdz201601008
[30] 张旗.中国东部中生代岩浆活动与太平洋板块向西俯冲有关吗?[J].岩石矿物学杂志, 2013, 32(1):113-128. doi: 10.3969/j.issn.1000-6524.2013.01.010
[31] 黄始琪, 董树文, 张福勤, 等.蒙古-鄂霍茨克构造带中段构造变形及动力学特征[J].地球学报, 2014, 35(4):415-424. http://d.old.wanfangdata.com.cn/Periodical/dqxb201404006
[32] 莫申国, 韩美莲, 李锦轶, 等.蒙古-鄂霍茨克造山带的组成及造山过程[J].山东科技大学学报(自然科学版), 2006, 24(3):50-52. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sdkjdxxb200503014
[33] 许文良, 王枫, 裴福萍, 等.中国东北中生代构造体制与区域成矿背景:来自中生代火山岩组合时空变化制约[J].岩石学报, 2013, 29(2):340-353. http://d.old.wanfangdata.com.cn/Periodical/ysxb98201302001
[34] 李宇, 丁磊磊, 许文良, 等.孙吴地区中侏罗世白云母花岗岩的年代学与地球化学:对蒙古-鄂霍茨克洋闭合时间的限定[J].岩石学报, 2015, 31(1):56-66. http://d.old.wanfangdata.com.cn/Periodical/ysxb98201501004
[35] 张万益.内蒙古东乌珠穆沁旗岩浆活动与金属成矿作用[D].中国地质科学院博士学位论文, 2007.
[36] 程银行, 李艳锋, 李敏, 等.内蒙古东乌旗碱性侵入岩的时代、成因及地质意义[J].地质学报, 2014, 88(11):2086-2096. http://d.old.wanfangdata.com.cn/Periodical/dizhixb201411006
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