| 内蒙古苏尼特左旗东苏岩石系列的成因与演化 |
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| 引用本文： | 罗照华,谌宏伟,柯,珊,罗,飞.内蒙古苏尼特左旗东苏岩石系列的成因与演化[J].中国地质,2002,29(3):291-296. |
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| 作者姓名： | 罗照华 谌宏伟 柯 珊 罗 飞 |
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| 作者单位： | 中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 国土资源大调查项目(200113900018-5,200113900069-4-3,20001010201) |
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| 摘 要： | 东苏岩石系列具有高SiO2富碱的特征，各组成单元之间具有明显的脉动型或涌动型侵入接触关系。但是，无论是主元素还是痕量元素地球化学特征，均不能用单一的岩浆成因模型得到解释。根据地质学、岩石学与地球化学特征，认为岩浆起源于麻粒岩相下地壳，源区残留矿物组合中含有斜长石，不含石榴石和角闪石。较早形成的芒乃陶勒盖单元可能与钾长石的堆晶作用有关，哈纳音哈达单元有幔源组分的贡献，哈纳音哈达与塔木嘎特两个单元之间具有同源岩浆演化的特征，而最后形成的乌兰哈达单元则可能是更深位岩浆侵入的产物。
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| 关 键 词： | 内蒙古 岩石系列 花岗岩 超单元 堆晶作用 岩浆起源 演化 |
| 文章编号： | 1000-3657(2002)03-0291-06 |
Petrogenesis and evolution of the Dongsu granite series in Sonid Zuoqi, Inner Mongolia |
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| LUO Zhao- hu,CHEN Hong-wei,KE Shan,LUO Fei.Petrogenesis and evolution of the Dongsu granite series in Sonid Zuoqi, Inner Mongolia[J].Chinese Geology,2002,29(3):291-296. |
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| Authors: | LUO Zhao- hu CHEN Hong-wei KE Shan LUO Fei |
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| Institution: | China University of Geosciences, Beijing 100083, China |
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| Abstract: | The Dongsu granite series has high-SiO 2 and alkali-rich features and the various component units show distinct pu lsating or surging intrusive contact relationships.However,neither major ele ment nor trace element geochemical characteristics can be explained by a simp le model of magmatic origin.Based on the geological,petrological and geochemi cal characteristics,it is believed that magma originated from the gran-ulite -facies lower crust.The relict mineral assemblage in the provenance contains plagioclase but no garnet or amphibole.The early-formed Mangnai Tolgoi unit is likely to be related to K-feldspar cumulation,the Hanayinhada unit contain s mantle-derived components,the Hanayinhada and Tamugate units have the fea- tures of comagmatic evolution,and the last-formed Wulanhada unit may be the p roduct of emplacement of magma at the deeper level. |
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| Keywords: | Inner Mongol ia rock series granite super-unit cumulation origin and evolution of magm a |
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