| 吉林省太古宙TTG岩石的两种演化趋势 |
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| 引用本文： | 孙德有,林强.吉林省太古宙TTG岩石的两种演化趋势[J].吉林地质,1997,16(4):61-69. |
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| 作者姓名： | 孙德有 林强 |
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| 作者单位： | 长春科技大学地球科学系 |
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| 摘 要： | 吉林省太古宙ＴＴＧ岩石形成于２．７～２．８Ｇａ，其母岩浆来自于下地壳角闪质岩石的部分熔融。母岩浆通过结晶分异作用形成了英云闪长质片麻岩类和花岗闪长质片麻岩类两大类岩石，早期的英云闪长质片麻岩类构成奥长花岗岩演化趋势，晚期的花岗闪长质片麻岩类则构成钙碱性演化趋势。研究表明这两种演化趋势的形成与岩浆结晶分离矿物相的种类及其比例有关。
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| 关 键 词： | TTG岩石 结晶分异作用 矿物相 演化趋势 岩石 |
TWO EVOLUTIONAL TRENDS OF THE ARCHEAN TTG ROCKS,JILIN PROVINCE |
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| Sun,Deyou,Lin,Qiang,Wu,Fuyuan,Ge,Wenchun.TWO EVOLUTIONAL TRENDS OF THE ARCHEAN TTG ROCKS,JILIN PROVINCE[J].Jilin Geology,1997,16(4):61-69. |
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| Authors: | Sun Deyou Lin Qiang Wu Fuyuan Ge Wenchun |
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| Abstract: | The Archean TTG rocks in Jilin province were formed in 2.7 2.8Ga.Their primary magma came from partical melting of amphibolites in deep crust.Two types of rocks of tonalitic and granodioritic gneiss were formed by primary magma through crystallization differentiation.The early tonalitic gneiss indicates trondjemitic evolutional trend and late granodioritic gneiss represents calcalkaline evolutional trend.The research shows that the formation of two different evolutional trends is related to the types and proportion of fractional phases during magma crystallization differentiation. |
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| Keywords: | TTG rocks Crystallization differentiation Fractional mineral facies Two evolutional trends Jilin province Archean |
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