| 北祁连金佛寺岩体地球化学特征及构造意义 |
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| 引用本文： | 党金花.北祁连金佛寺岩体地球化学特征及构造意义[J].甘肃地质学报,2011(2):40-44. |
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| 作者姓名： | 党金花 |
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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： | 祁连西段1:250000区域遥感地质调查项目(DK0002019)资助 |
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| 摘 要： | 金佛寺岩体为北祁连华力西早期形成的一个较大的复式深成岩基,主要岩石类型为二长花岗岩、黑云二长花岗岩和正长花岗岩,为高钾钙碱性岩系,具高钾、高铝和低钛的特点;REE分布模式为弱Eu异常;在Peace的Rb-Y-Nb图解中位于后碰撞花岗岩类区。岩体的同位素锆石U-Pb年龄为345.0±75.0Ma,代表其形成时代为晚泥盆世...
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| 关 键 词： | 花岗岩 地球化学 后碰撞 金佛寺 北祁连 |
GEOCHEMICAL CHARACTERISTICS AND TECTONIC IMPLICATIONS OF JINFOSI GRANITE IN NORTH QILIAN |
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| DANG Jin-hua.GEOCHEMICAL CHARACTERISTICS AND TECTONIC IMPLICATIONS OF JINFOSI GRANITE IN NORTH QILIAN[J].Acta Geologica Gansu,2011(2):40-44. |
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| Authors: | DANG Jin-hua |
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| Institution: | DANG Jin-hua (No.3 Geology and Mineral Exploration Team,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730000,China) |
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| Abstract: | Jinfosi granite is a larger composite granitoid which has been formed in early Hercynian period.Composed of monzogranite,biotite monzogranite and syenite granite,it has the characteristics of high-K,high-Al,low-alkali,low-Ti.On the REE distribution patterns,Eu appears as a weak anomaly.The plots fall into the section of the post-collisional granites on the Rb-Y-Nb diagram of Peace.The U-Pb zircon age is 345.0 ± 75.0Ma which represent the Jinfosi granite was formed in the Late Devonian.The rocks should be formed in the post-collisional orogenic period while the continental blocks were continuing to converge after completion of main orogenesis. |
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| Keywords: | granite geochemistry post-collision Jifosi North Qilian |
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