全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

阿拉善地块北缘古大洋闭合的时间制约:来自乌力吉花岗岩体的证据

, PP. 1299-1311

Keywords: 阿拉善,恩格尔乌苏,查干础鲁,离子探针,壳幔混合,火山弧,后碰撞

Full-Text   Cite this paper   Add to My Lib

Abstract:

?乌力吉花岗岩位于阿拉善地块北缘,构成沙拉扎山的主体,处在华北板块西北缘宗乃山-沙拉扎山火山弧构造带,其北侧为恩格尔乌苏蛇绿岩带,南侧为查干础鲁蛇绿岩带.岩体侵入于上石炭统-下二叠统阿木山组.根据研究区原石炭系阿木山组的沉积建造分析,中下岩段为火山岩-碎屑岩-碳酸盐岩建造,反映了火山弧及弧后盆地沉积组合的基本特征;上岩段由粉砂质页岩-砂岩-含砾砂岩-砾岩组成,为一套陆相磨拉石建造.乌力吉花岗岩以黑云母二长花岗岩、含角闪石黑云母二长花岗岩、二长花岗岩为主.SiO2平均大于70%,Al2O3的含量多大于14%,偏铝质-过铝质;Na2O+K2O含量高,平均8.51%,大部分富钠,部分富钾,属钙碱性系列;球粒陨石标准化分配模式图上,富集轻稀土元素,重稀土元素分馏不明显且相对亏损,Eu具有弱负异常,δEu=0.27~1.00.在微量元素原始地幔标准化蛛网图上,亏损Nb,Ta,Ti,P,Sr和Ba,富集Rb,Th和K.乌力吉花岗岩体离子探针锆石U-Pb年龄为(250.8±2.0)Ma,εNd(t)=-0.1~1.3,指示了壳幔混合来源.根据岩体的地球化学特征,乌力吉花岗岩为具有火山弧地球化学特征的后碰撞花岗岩,岩浆来源于具有弧性质的新生陆壳部分熔融与幔源物质的混合.根据最新的国际地层划分标准,现已将阿木山组的上岩段划归下二叠统,表明该区弧后盆地在早二叠世已经闭合.结合区域地质背景可以认为,晚石炭世以恩格尔乌苏蛇绿岩带为代表的古亚洲洋向南俯冲,在阿拉善地块北缘形成了沟弧盆体系,并于早二叠世最终闭合,晚二叠世已经进入后碰撞阶段.

References

[1]  50 Pearce J A, Harris N B W, Tindle A G. Trace-element discrimination diagrams for the tectonic interpretation of granitic rocks. J Petrol, 1984, 25: 956-983
[2]  51 Pearce J A. Sources and settings of granitic rocks. Episodes, 1996, 19: 120-125
[3]  52 Yang Y H, Zhang H F, Chu ZY, et al. Combined chemical separation of Lu,Hf,Rb,Sr,Sm and Nd from a single rock digest and precise and accurate isotope determinations of Lu-Hf, Rb-Sr and Sm-Nd isotope systems using Multi-collector ICP-MS and TIMS. Int J Mass Spectrom, 2010, 290: 120-126
[4]  53 Jahn B M, Wu F Y, Hong D W. Important crustal growth in the Phanerozoic: Isotopic evidence of granitoids from east-central Asia. Proc Indian Acad Sci (Earth Planet Sci), 2000, 109: 5-10
[5]  54 江思宏, 聂凤军. 北山地区花岗岩类成因的Nd同位素制约. 地质学报, 2006, 80: 826-842
[6]  55 聂凤军, 江思宏, 白大明, 等. 北山地区金属矿床成矿规律及找矿方向. 北京: 地质出版社, 2002. 1-408
[7]  61 Wang T, Jahn B M, Kovach V P, et al. Nd-Sr isotopic mapping of the Chinese Altai and implications for continental growth in the Central Asian Orogenic Belt. Lithos, 2009, 110: 359-372
[8]  81 佘宏全, 王义文, 李庆环, 等. 内蒙古赤峰柴胡栏子金矿基性麻粒岩包体特征及其成矿动力学意义. 地质学报, 2006, 80: 863-875
[9]  82 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其地质意义. 岩石学报, 2006, 22: 2769-2780
[10]  83 施光海, 苗来成, 张福勤, 等. 内蒙古锡林浩特A型花岗岩的时代及区域构造意义. 科学通报, 2004, 49: 384-389
[11]  84 Zhang X H, Zhang H F, Zhai M G, et al. Geochemistry of Middle Triassic gabbros from northern Liaoning, North China: Origin and tectonic implications. Geol Maga, 2009, 146: 540-551
[12]  85 Batkhishig B, Noriyoshi T, Greg B. Magmatism of the Shuteen Complex and Carboniferous subduction of the Gurvansaikhan terrane, South Mongolia. J Asian Earth Sci, 2010, 37: 399-411
[13]  86 Blight J H S, Crowley Q G, Petterson M G, et al. Granites of the Southern Mongolia Carboniferous Arc: New geochronological and geochemical constraints. Lithos, 2010, 116: 35-52
[14]  10 Charvet J, Shu L, Laurent-Charvet S. Paleozoic structural and geodynamic evolution of eastern Tianshan (NW China): Welding of the Tarim and Junggar plates. Episodes, 2007, 30: 162-185
[15]  11 吴泰然. 阿拉善地块北缘古生代岩石圈的物质组成和构造演化. 博士学位论文. 北京: 北京大学, 1990. 1-132
[16]  12 Wu T R, He G Q. Tectonic Units and Their Fundamental Chatacteristics on the Northern Margin of the Alxa Block. Acta Geol Sin, 1993, 6: 373-385
[17]  13 Li J Y. Permian geodynamic setting of Northeast China and adjacent regions: Closure of the Paleo-Asian Ocean and subduction of the Paleo-Pacific Plate. J Asian Earth Sci, 2006, 26: 207-224
[18]  14 Xiao W J, Windley B F, Hao J, et al. Accretion leading to collision and the Permian Solonker suture, inner Mongolia, China: Termination of the Central Asian orogenic belt. Tectonics, 2003, 22: 1069
[19]  15 Xiao W J, Windley B F, Huang B C, et al. End-Permian to mid-Triassic termination of the accretionary processes of the southern Altaids: Implications for the geodynamic evolution, Phanerozoic continental growth, and metallogeny of Central Asia. Int J Earth Sci, 2009, 98: 1189-1217
[20]  16 Dobretsov N L, Berzin N A, Buslov M M. Opening and tectonic evolution of the Paleo-Asian Ocean. Int Geol Rev. 1995, 37: 335-360
[21]  17 Windley B F, Alexeiev D, Xiao W J, et al. Tectonic models for accretion of the Central Asian Orogenic Belt. J Geol Soc London, 2007, 164: 31-47
[22]  18 王廷印, 王士政, 王金荣. 阿拉善地区古生代陆壳的形成和演化. 兰州: 兰州大学出版社, 1994. 1-215
[23]  19 王廷印, 王金荣, 王士政. 阿拉善北部恩格尔乌苏蛇绿混杂岩带的发现及其构造意义. 兰州大学学报(自然科学版), 1992, 28: 194-196
[24]  20 王金荣, 宋春晖, 高军平, 等. 阿拉善北部恩格尔乌苏蛇绿混杂岩的形成机制. 兰州大学学报(自然科学版), 1995, 31: 140-146
[25]  21 王廷印, 张铭杰, 王金荣. 恩格尔乌苏冲断带特征及大地构造意义. 地质科学, 1998, 33: 385-394
[26]  22 吴泰然, 何国琦. 阿拉善地块北缘的蛇绿混杂岩带及其大地构造意义. 现代地质, 1992, 6: 286-296
[27]  26 王廷印, 高军平, 王金荣, 等. 内蒙古阿拉善北部地区碰撞期和后造山期岩浆作用. 地质学报, 1998, 72: 126-137
[28]  56 范洪海, 闵茂中, 陈佳, 等. 甘肃北山野马泉岩体同位素地球化学特征. 地球学报, 2005, 26(增刊): 78-83
[29]  57 Hong D W, Zhang J S, Wang T, et al. Continental crustal growth and the supercontinental cycle: Evidence from the Central Asian Orogenic Belt. J Asian Earth Sci, 2004, 23: 799-813
[30]  58 Han B F, Wang S G, Jahn B M, et al. Depleted-mantle source for the Ulungur River A-type granites from North Xinjiang, China: Geochemistry and Nd-Sr isotopic evidence, and implications for Phanerozoic crustal growth. Chem Geol, 1997, 138: 135-159
[31]  59 赵振华, 王中刚, 邹天人, 等. 新疆乌伦古富碱侵入岩成因探讨. 地球化学, 1996, 25: 205-220
[32]  60 韩宝福, 王式洸, 孙元林, 等. 正εNd(T)值的准铝-过铝花岗岩: 新疆也布山岩体. 科学通报, 1998, 43: 1323-1328
[33]  62 赵振华, 王中刚, 邹天人, 等. 阿尔泰花岗岩类REE及O, Pb, Sr, Nd 同位素组成及成岩类型. 见: 涂光炽, 主编. 新疆北部固体地球科学新进展. 北京: 科学出版社, 1993. 239-266
[34]  63 Chen B, Jahn B M, Wilde S, et al. Two contrasting paleozoic magmatic belts in northern Inner Mongolia, China: Petrogenesis and tectonic implications. Tectonophysics. 2000, 328: 157-182
[35]  64 洪大卫, 王式洸, 谢锡林, 等. 兴蒙造山带正εNdt值花岗岩的成因和大陆地壳生长. 地学前缘, 2000, 7: 441-456
[36]  65 李华芹, 谢才富, 常海亮. 新疆北部主要有色贵金属矿床成矿期同位素年代学研究. 北京: 地质出版社, 1998. 1-264
[37]  66 Wu F Y, Jahn B M, Wilde S, et al. Phanerozoic crustal growth: U-Pb and Sr-Nd isotopic evidence from the granites in northeastern China. Tectonophysics, 2000, 328: 89-113
[38]  67 Wu F Y, Jahn B M, Wilde S, et al. Highly fractionated I-type granites in NE China (II): Isotopic geochemistry and implications for crustal growth in the Phanerozoic. Lithos, 2003, 67: 191-204
[39]  68 周泰禧, 陈江峰, 李学明. 新疆阿拉套山花岗岩类高εNd值的成因探讨. 地质科学, 1996, 31: 71-79
[40]  69 Helo C, Hegner E, Kroner A, et al. Geochemical signature of Paleozoic accretionary complexes of the Central Asian Orogenic Belt in South Mongolia: Constraints on arc environments and crustal growth. Chem Geol, 2006, 227: 236-257
[41]  70 Jahn B M, Capdevila R, Li D Y, et al. Sources of Phanerozoic granitoids in the transect Bayanhongor-Ulaan Baatar, Mongolia: Geochemical and Nd isotopic evidence, and implications for Phanerozoic crustal growth. J Asian Earth Sci, 2004, 23: 629-653
[42]  71 Heinhorst J, Lehmann B, Ermolov P, et al. Paleozoic crustal growth and metallogeny of Central Asia: Evidence from magmatic-hydrothermal ore systems of Central Kazakhstan. Tectonophysics, 2000, 328: 69-87
[43]  72 李昌年. 构造岩浆判别的地球化学方法及其讨论. 地质科技情报, 1992, 11: 73-78
[44]  73 张旗, 王元龙, 金惟俊, 等. 造山前、造山和造山后花岗岩的识别. 地质通报, 2008, 27: 1-18
[45]  74 Batchelor R A, Bowden P. Petrogenetic interpretation of granitoid rock series using multicationic parameters. Chem Geol, 1985, 48: 43-55
[46]  75 Jahn B M, Wu F Y, Chen B. Massive granitoid generation in Central Asia: Nd isotope evidence and implication for continental growth in the Phanerozoic. Episodes, 2000, 23: 82-92
[47]  76 樊祺诚, 隋建立, 刘若新, 等. 汉诺坝榴辉岩相石榴辉石岩—岩浆底侵作用新证据. 岩石学报, 2001, 17: 1-6
[48]  77 洪大卫, 黄怀曾, 肖宜君, 等. 内蒙古中部二叠纪碱性花岗岩及其地球动力学意义. 地质学报, 1994, 68: 219-230
[49]  78 邵济安, 张任祜, 韩庆军, 等. 内蒙古喀喇沁堆晶岩捕虏体和寄主闪长岩的同位素年龄. 地球化学, 2000, 29: 331-336
[50]  79 邵济安, 韩庆军, 张履桥, 等. 内蒙古东部早中生代堆积岩捕虏体的发现. 科学通报, 1999, 44: 478-485
[51]  80 佘宏全, 徐贵忠, 周瑞, 等. 内蒙东部红花沟金矿田早中生代构造-岩浆活动及对金成矿的控制作用. 现代地质, 2000, 14: 408-416
[52]  1 Tang K. Tectonic development of Paleozoic fold belts at the north margin of the Sino-Korean craton. Tectonics, 1990, 9: 249-260
[53]  2 Tang K, Yan Z. Regional metamorphism and tectonic evolution of the Inner Mongolian suture zone. J Metamor Geol, 1993, 11: 511-522
[54]  3 Kheraskova T N, Didenko A N, Bush V A, et al. The Vendian-Early Paleozoic history of the continental margin of Eastern Paleogondwana, Paleoasian Ocean, and Central Asian Fold belt. Russ J Earth Sci, 2003, 5: 165-184
[55]  4 Yue Y, Liou J G, Graham S A. Tectonic correlation of Beishan and Inner Mongolia orogens and its implications for the palinspastic reconstruction of north China. In: Hendrix M S, Davis G A, eds. Paleozoic and Mesozoic Tectonic Evolution of Central and Eastern Asia: From Continental Assembly to Intracontinental Deformation. Geol Soc Am Mem, 2001, 194: 101-116
[56]  5 何国琦, 李茂松, 刘德全, 等. 中国新疆古生代地壳演化及成矿. 乌鲁木齐: 新疆人民出版社; 香港: 香港文化教育出版社, 1994. 1-437
[57]  6 Han B F, Wang S G, Jahn B M, et al. Depleted-mantle source for the Ulungur River A-type granites from North Xinjiang, China: Geochemistry and Nd-Sr isotopic evidence, and implications for Phanerozoic crustal growth. Chemi Geol, 1997, 138: 135-159
[58]  7 Wang B, Chen Y, Zhan S, et al. Primary Carboniferous and Permian paleomagnetic results from Yili Block and their geodynamic implications on evolution of Chinese Tianshan Belt. Earth Planet Sci Lett, 2007, 263: 288-308
[59]  8 Hendrix M S, Graham S A, Amory J Y, et al. Noyon Uul Syncline, southern Mongolia; lower Mesozoic sedimentary record of the tectonic amalgamation of Central Asia. Geol Soc Am Bull, 1996, 108: 1256-1274
[60]  9 Solomovich L I, Trifonov B A. Post-collisional granites in the South Tien Shan Variscan collisional belt, Kyrgyzstan. J Asian Earth Sci, 2002, 21: 7-21
[61]  23 Wu T R, He G Q, Zhang C. On Paleozoic Tectonics in the Alxa Region. Acta Geol Sin, 1998, 72: 256-263
[62]  24 王廷印, 刘金坤, 王士政, 等. 阿拉善北部中蒙边界地区晚古生代拉伸作用及构造岩浆演化. 中国区域地质, 1993, (4): 317-327
[63]  25 王廷印, 王金荣, 刘金坤, 等. 宗乃山-沙拉扎山陆壳基底火山弧火成岩组合及地球化学特征. 地球化学, 1994, 23(增刊): 62-172
[64]  27 周良仁, 于浦生. 阿拉善地区的华力西运动. 西北地质, 1990, (2): 22-31
[65]  28 王喜宽, 张丽莉, 廖蕾, 等. 巴彦诺尔公花岗岩体与乌力吉花岗岩体的地球化学特征及成矿意义. 华南地质与矿产, 2004, (1): 24-28
[66]  29 张永清, 韩建刚, 孟二根, 等. 内蒙古阿拉善盟巴音诺日公地区赛里超单元的特征及构造意义. 华南地质与矿产, 2003, (2): 36-40
[67]  30 耿元生, 吴春明, 沈其韩, 等. 阿拉善地区新元古代晋宁期变形花岗岩的发现及其地质意义. 岩石矿物学杂志, 2002, 21: 412-420
[68]  31 任康绪, 阎国翰, 牟保磊, 等. 阿拉善断块富碱侵入岩岩石地球化学和Nd, Sr, Pb同位素特征及其意义. 地学前缘, 2005, 12: 292-301
[69]  32 内蒙古自治区地质矿产局. 内蒙古自治区区域地质志. 北京: 地质出版社, 1991. 1-725
[70]  33 李文国, 李庆富, 姜万德. 全国地层多重划分对比研究(15), 内蒙古自治区岩石地层. 武汉: 中国地质大学出版, 1996. 1-344
[71]  34 鲍庆中, 张长捷, 吴之理, 等. 内蒙古西乌珠穆沁旗地区石炭二叠纪岩石地层. 地层学杂志, 2005, 29(增刊): 512-519
[72]  35 陈践发, 卢进才, 石正勇, 等. 内蒙古西部额济纳旗及其邻区石炭系-二叠系烃源岩的发育特征和生烃潜力评价. 地质通报, 2010, 29: 346-350
[73]  36 Li X H, Liu Y, Li Q L, et al. Precise determination of Phanerozoic zircon Pb/Pb age by multicollector SIMS without external standardization. Geochem Geophys Geosyst, 2009, 10: Q04010, doi: 10.1029/2009GC002400
[74]  37 Black L P, Kamo S L, Allen C M, et al. Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element-related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards. Chem Geol, 2004, 205: 115-140
[75]  38 Wiedenbeck M, Alle P, Corfu F, et al. Three natural zircon standards for U-Th-Pb, Lu-Hf, trace-element and REE analyses. Geostand Newsl, 1995, 19: 1-23
[76]  39 Li Q L, Li X H, Liu Y, et al. Precise U-Pb and Pb-Pb dating of Phanerozoic baddeleyite by SIMS with oxygen flooding technique. J Anal At Spectrom, 2010, 25: 1107-1113
[77]  40 Stacey J S, Kramers J D. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth Planet Sci Lett, 1975, 26: 207-221
[78]  41 Lugwig K R. Isoplot 3.0: A geochronological toolkit for microsoft excel. Berkeley Geochr Center Spec Publ, 2003, 4: 1-71
[79]  42 Belousova E A, Griffin W L, O''Reilly S Y, et al. Igneous zircon: Trace element composition as an indicator of source rock type. Contrib Mineral Petrol, 2002, 143: 602-622
[80]  43 吴元保, 郑永飞. 锆石成因矿物学研究及其对U-Pb年龄解释的制约. 科学通报, 2004, 49: 1589-1604
[81]  44 Maniar P D, Piccoli P M. Tectonic discrimination of granitoids. Geol Soc Am Bull, 1989, 101: 635-643
[82]  45 Rickwood P C. Boundary lines within petrologic diagrams which use oxides of major and minor elements. Lithos, 1989, 22: 247-263
[83]  46 Peccerillo A, Taylor S R. Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey. Contrib Mineral Petrol, 1976, 58: 63-81
[84]  47 Sun S S, Mcdonough W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. In: Saunders A D, Norry M J, eds. Magmatism in the Ocean Basins. Geol Soc Spec Publ, 1989, 42: 313-345
[85]  48 张旗, 王焰, 李承东, 等. 花岗岩的Sr-Yb分类及其地质意义. 岩石学报, 2006, 22: 2249-2269
[86]  49 张旗, 王焰, 李承东, 等. 花岗岩按照压力的分类. 地质通报, 2006, 25: 1274-1278

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133