| 川西北羊拱海花岗岩体的地球化学特征及成因初探 |
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| 引用本文： | 罗,改.川西北羊拱海花岗岩体的地球化学特征及成因初探[J].地质与勘探,2009,45(2):14-19. |
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| 作者姓名： | 罗 改 |
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| 作者单位： | 1. 成都理工大学,成都,610059
2. 四川省地质调查院,成都,610081 |
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| 基金项目： | 中国国土资源大调查项目(编号:1212010510304)资助 |
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| 摘 要： | 位于松潘-甘孜褶皱带东部三角区内的羊拱海岩体主要是由中心相酸性的二长花岗岩向边缘相中酸性的花岗闪长岩过渡.通过对该花岗岩体的常量元素、微量元素及稀土元素地球化学特征的研究可知,羊拱海花岗岩属于高钾钙碱性、弱过铝-过铝质岩石系列,Rb、Th、K等富集,Ti、Ba、Nb、Sr、P明显亏损,表现为较平坦的具有较弱Eu亏损的稀土配分模式;岩体具有I型与S型花岗岩过渡类型的特点,是在印支晚期区域上大规模的陆-陆碰撞造山运动中,俯冲的陆壳楔形区在下地壳使局部同熔岩浆沿断裂通道上侵定位形成的.
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| 关 键 词： | 川西北 羊拱海 花岗岩体 地球化学 |
| 收稿时间： | 2008/6/30 0:00:00 |
| 修稿时间： | 2009/2/17 0:00:00 |
Geochem ica l Character istics and Prelim inary Study on Petrogenesis of the Yanggongha i
Gran ite Body in Northwestern S ichuan |
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| LUO Gai.Geochem ica l Character istics and Prelim inary Study on Petrogenesis of the Yanggongha i
Gran ite Body in Northwestern S ichuan[J].Geology and Prospecting,2009,45(2):14-19. |
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| Authors: | LUO Gai |
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| Institution: | 1.Chengdu University of Technology;Chengdu 610059;Sichuan;2.Sichuan Institute of Geological Survey;Chengdu 610081;Sichuan |
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| Abstract: | The Yanggonghai granite body,located in a triangle region of the eastern Songpan-Ganzi folded zone,is mainly composed of acid monzogranite in central phase and intermediate-acid granodiorite in marginal phase,the change between two phases is transitional.Geochemical study of major elements,trace elements and rare earth elements concluded that the Yanggonghai granite body,with enrichment of Rb,Th and K and depletion of Ti,Ba,Nb,Sr and P,could be classified to high-potassium calc-alkaline and weakly peralumin... |
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| Keywords: | northwestern sichuan Yanggonghai granite body geochemistry |
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