| 甘肃金塔县晚古生代拐把头花岗岩地球化学特征及构造意义 |
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| 引用本文： | 赵 玮,王启航,杨春霞,王晓伟,高 翔.甘肃金塔县晚古生代拐把头花岗岩地球化学特征及构造意义[J].甘肃地质学报,2014,23(3):15-20. |
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| 作者姓名： | 赵 玮 王启航 杨春霞 王晓伟 高 翔 |
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| 作者单位： | 甘肃省地矿局第三地勘院; |
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| 基金项目： | 甘肃省金塔县石板泉一带1:5万矿产远景调查项目([甘财建(2010)254]) |
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| 摘 要： | 拐把头花岗岩具有高硅低铝、富钾贫钠、准铝质或I型花岗岩,明显富集Rb、Th、K等大离子不相容元素,亏损Ba、Sr、P、Ti等元素,并具有弱Nb亏损,稀土元素分布曲线呈明显的＂海鸥＂型,形成于挤压的构造背景下,代表了北山晚古生代晚期重要的构造—岩浆事件。
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| 关 键 词： | 花岗岩 地球化学 构造 金塔 |
GEOCHEMICAL CHARACTERISTICS AND GEOLOGICAL SIGNIFICANCE OF NEOPALEOZOIC GRANITE IN THE GUAIBATOU OF JINTA COUNTY,GANSU |
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| ZHAO Wei,WANG Qi-hang,YANG Chun-xai,WANG Xiao-wei and GAO Xiang.GEOCHEMICAL CHARACTERISTICS AND GEOLOGICAL SIGNIFICANCE OF NEOPALEOZOIC GRANITE IN THE GUAIBATOU OF JINTA COUNTY,GANSU[J].Acta Geologica Gansu,2014,23(3):15-20. |
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| Authors: | ZHAO Wei WANG Qi-hang YANG Chun-xai WANG Xiao-wei and GAO Xiang |
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| Institution: | (No. 3 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou 730050, China) |
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| Abstract: | Granite in Guaibatou of Jinta County, Gansu Province is I-type granite with high silicon, low aluminum, rich potassium and poor sodium, significantly enriched in such large ion incompatible elements as Rb,Th, K, lack of Ba, Sr, P, Ti. REE distribution curve has an appearance as a ＂seagull＂ type which indicate granite should developed under compression tectonic setting, it was an important tectonic-magmatic event during Neopaleozoic Period in Beishan. |
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| Keywords: | granite geochemistry structure Guaibatou |
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