| 平武地区中生代花岗岩类的演化特征及其成因意义 |
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| 引用本文： | 谢启兴,何文劲.平武地区中生代花岗岩类的演化特征及其成因意义[J].四川地质学报,2000,20(2):93-99. |
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| 作者姓名： | 谢启兴 何文劲 |
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| 作者单位： | 四川省地勘局川西北地质队!四川绵阳621000 |
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| 摘 要： | 平武地区花岗岩类十分发育。总体组成一近南北向的花岗岩带展布于古城断裂以北。花岗岩属次铝质钙碱性岩系，富硅碱高，富集Ｗ、Ｃｓ、Ｓｅ、Ｓｂ、Ｚｎ贫Ｃｒ、Ｃｏ、Ｎｉ、Ｚｒ。轻稀土富集，δＥｕ具负异常，表现为同碰撞深熔花 岩特征，成因类型则显示为以“１”型为主，兼有“Ｓ”型的混源型花岗岩。全岩Ｋ－Ａｒ年龄及地质事件分析岩浆活动主体为晚三叠世－早侏罗世。
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| 关 键 词： | 花岗岩类 演化 成因 平武地区 |
EVOLUTION AND ORIGIN OF MESOZOIC GRANITOID IN PINGWU AREA |
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| Xie Qixing,He Wenjin and Chen Ming.EVOLUTION AND ORIGIN OF MESOZOIC GRANITOID IN PINGWU AREA[J].Acta Geologica Sichuan,2000,20(2):93-99. |
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| Authors: | Xie Qixing He Wenjin and Chen Ming |
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| Abstract: | Granitoids are well developed in Pingwu They are exposed to the north of Gucheng fault They belong to metaluminous calc alkaline series They are characteristic of anatectic granite,being rich in silica,alkali,W,Cs,Se,Sb,Zn and depleted Cr,Co,Ni,Zr,with moderate en riched LREE and weakly negalive Eu anomaly. |
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| Keywords: | granitoids evolution origin Pingwu area |
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