| 阿尔泰造山带早古生代TTG侵入岩石组合的确定及构造意义 |
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| 引用本文： | 赵同阳,屈迅,王克卓,周汝洪,朱志新,徐仕琪,徐永波.阿尔泰造山带早古生代TTG侵入岩石组合的确定及构造意义[J].新疆地质,2012,30(2):165-171. |
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| 作者姓名： | 赵同阳 屈迅 王克卓 周汝洪 朱志新 徐仕琪 徐永波 |
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| 作者单位： | 1. 新疆维吾尔自治区地质调查院,新疆 乌鲁木齐,830000
2. 新疆维吾尔自治区地质矿产勘查开发局,新疆 乌鲁木齐,830000 |
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| 基金项目： | 新疆矿产资源潜力评价项目(1212010813030)资助 |
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| 摘 要： | 利用标准矿物分类系统进行TTG岩石组合鉴别,认为中阿尔泰地区存在早古生代中晚期(416～462 Ma)侵位的英云闪长岩-奥长花岗岩-花岗闪长岩组合(T1T2G1)及英云闪长岩-奥长花岗岩-花岗岩组合(T1T2G2)。岩石具富镁、钙而贫碱特点,Rb,Th,La,Ce,Nd,Zr,Hf相对富集,Ba,Sr,P,Nb强烈亏损。(La/Yb)N比为4.61～5.69,轻稀土分馏程度较高,为板块碰撞前(俯冲期)花岗岩,并与外蒙古地区早古生代GG侵入岩浆构造带组合,构成指示洋壳俯冲方向的TTG-GG岩石组合岩浆带。
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| 关 键 词： | 阿尔泰 早古生代 TTG 蛇绿岩 板块俯冲 |
Determination of Early Paleozoic TTG Intrusive Rock and its Tectonic Significance in Altay Orogen |
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| ZHAO Tong-yang
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QU Xun
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WANG Ke-zhuo
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ZHOU Ru-hong
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ZHU Zhi-xin
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XU Shi-qi
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XU Yong-bo.Determination of Early Paleozoic TTG Intrusive Rock and its Tectonic Significance in Altay Orogen[J].Xinjiang Geology,2012,30(2):165-171. |
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| Authors: | ZHAO Tong-yang QU Xun WANG Ke-zhuo ZHOU Ru-hong ZHU Zhi-xin XU Shi-qi XU Yong-bo |
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| Institution: | 1(1.Geological Research Academe of Xinjiang,Urimqi,Xinjiang,830000,China;2.Bureau of Geology and Mineral Resources Development of Xinjiang,Urimqi,Xinjiang,830000,China) |
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| Abstract: | The use of standard classification system for TTG rock mineral identification,The results show that in the late Paleozoic(416～462Ma) exist tonalite–trondhjemite-granodiorite combination(T1T2G1) and tonalite–trondhjemite-granite combination(T1T2G2).The rock combination with magnesium rich,calcium and alkaline poor characteristics,the relative enrichment of Rb,Th,La,Ce,Nd,Zr,Hf;Ba,Sr,P,Nb strongly losses.(La/YbN)ratio of 4.61 to 5.69,with higher levels of light rare earths fractionation,plate before collision(subduction period) granite.And Mongolia Early Paleozoic intrusive magma tectonic belt GG combination,which indicates the oceanic crust subduction direction of TTG-GG rock assemblage zone of magma. |
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| Keywords: | Altay Early Paleozoic TTG Ophiolite Plate Subduction |
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