| 内蒙古扎鲁特地区毛伊勒吐岩体形成时代及构造环境 |
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| 引用本文： | 李雪菲,赵庆英,王晓志,张乐彤,程立人,王天武.内蒙古扎鲁特地区毛伊勒吐岩体形成时代及构造环境[J].地质与资源,2012,21(2):194-199. |
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| 作者姓名： | 李雪菲 赵庆英 王晓志 张乐彤 程立人 王天武 |
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| 作者单位： | 吉林大学 地球科学学院, 吉林 长春 130061 |
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| 基金项目： | 国家自然科学基金重大研究计划，内蒙古区政府项目，国家油气选区项目 |
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| 摘 要： | 通过对宏观地质特征、岩石矿物学特征、岩石化学和地球化学特征、同位素年代学研究，对毛伊勒吐岩体形成时代和构造环境进行了探讨.依据岩石化学分析结果和岩石学特征，认为该岩体为钙碱性岩石.对其中的石英闪长岩进行了SHRIMP锆石U-Pb年代学测定，206Pb/238U表面年龄统计权重平均值为147.97±0.95 Ma，表明毛伊勒吐岩体侵位时代属于晚侏罗世.结合区域地质演化特征分析，该石英闪长岩是在板块碰撞后地壳抬升时期形成的.
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| 关 键 词： | 毛伊勒吐地区 侏罗纪 石英闪长岩 锆石U-Pb年龄 内蒙古 |
| 收稿时间： | 2011-12-07 |
THE FORMING AGE AND TECTONIC ENVIRONMENT OF THE MAOYILETU ROCK BODY IN JARUD, INNER MONGOLIA |
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| LI Xue-fei
,
ZHAO Qing-ying
,
WANG Xiao-zhi
,
ZHANG Le-tong
,
CHENG Li-ren
,
WANG Tian-wu.THE FORMING AGE AND TECTONIC ENVIRONMENT OF THE MAOYILETU ROCK BODY IN JARUD, INNER MONGOLIA[J].Geology and Resources,2012,21(2):194-199. |
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| Authors: | LI Xue-fei ZHAO Qing-ying WANG Xiao-zhi ZHANG Le-tong CHENG Li-ren WANG Tian-wu |
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| Institution: | College of Earth Sciences, Jilin University, Changchun 130061, China |
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| Abstract: | With study on its geological background, petrologic and mineralogical characteristics, geology, geochemistry and isotopic chronology, the structural environment and forming age of the Maoyiletu rock body are discussed. The geological and geochemical characteristics show the calc alkaline characteristics. According to the SHRIMP U-Pb isotope chronologic analysis result, the statistical weight average of ~pb~sU surface age is 147.97：d3.95 Ma, which represents the emplacement age of the rock body, belongs to Late Jurassic period. Combined with the analysis on the evolution characteristics of regional geology, the quartz diorite was formed during the crustal uplifting after the plate collision. |
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| Keywords: | Maoyiletu area Jurassic quartz diorite U-Pb age of zircon Inner Mongolia |
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