| 内蒙古道郎山地区花岗岩的地质地球化学特征及其意义 |
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| 引用本文： | 郭旻,李响,胡祥昭,邹海洋.内蒙古道郎山地区花岗岩的地质地球化学特征及其意义[J].现代地质,2010,24(4). |
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| 作者姓名： | 郭旻 李响 胡祥昭 邹海洋 |
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| 作者单位： | 中南大学,地学与环境工程学院,湖南,长沙,410083 |
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| 摘 要： | 内蒙古道郎山位于华北板块北缘,区内出露的花岗岩主要为燕山期岩体,岩石类型主要为黑云母花岗岩。岩石地球化学特征表现为强过铝质、富硅贫钙。岩石的里特曼指数平均值为1.80,碱度指数AR平均值为2.6,属于钙碱性系列岩石。岩体分异指数高,结晶演化程度高;稀土总量偏低,具有明显Eu负异常。推测岩体是由成熟度较高的泥质岩类在较低的温度下部分熔融形成的。
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| 关 键 词： | 花岗岩 地质特征 地球化学 道郎山 内蒙古 |
Geological and Geochemical Characteristics of Granite in the Daolangshan Region, Inner Mongolia |
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| GUO Min,LI Xiang,HU Xiang-zhao,ZOU Hai-yang.Geological and Geochemical Characteristics of Granite in the Daolangshan Region, Inner Mongolia[J].Geoscience——Journal of Graduate School,China University of Geosciences,2010,24(4). |
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| Authors: | GUO Min LI Xiang HU Xiang-zhao ZOU Hai-yang |
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| Abstract: | The Daolangshan region is located in the northern margin of North China Plate.The outcropped rockbody are mainly Yanshanian biotite granite.Geochemical data show characteristics with rich aluminum,rich silicon and poor calcium contents.The rock Rittman index is an average of 1.80 and alkalinity index is an averaged of 2.6,belongs to calc-alkaline granite.The rockbody has a high differentiation index value,with a high degree of crystallinity evolution.The total REE content of granite body is low,with an obvious negative Eu anomaly.It is concluded that the rock body is formed from partially melting of the high maturity shale rocks in the low temperature. |
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| Keywords: | granite geological characteristic geochemistry Daolangshan Inner Mongolia |
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