| 冀东角闪石成分环带记录的P-T-t轨迹 |
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| 引用本文： | 刘树文,林强,曹林.冀东角闪石成分环带记录的P-T-t轨迹[J].吉林大学学报(地球科学版),1991(2). |
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| 作者姓名： | 刘树文 林强 曹林 |
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| 作者单位： | 长春地质学院地质系
(刘树文，林强)，长春地质学院地质系(曹林) |
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| 摘 要： | 冀东马兰峪地区出露较大面积的太古宙含紫苏辉石的英云闪长质片麻岩,其中角闪石矿物的Si、Fe、Mg、Mg/(Mg+Fe)等呈明显的环带特点。研究表明,其成分环带与角闪石生长过程和变质条件有关。不同环带成分的热力学计算得到一条逆时针P-T-t轨迹。该P-T-t轨迹与不同变质阶段平衡共生的矿物温度压力计计算的P-T-t轨迹相似。
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| 关 键 词： | 马兰峪地区 角闪石环带 热力学 P-T-t轨迹 |
THE P-T-t TRAJECTORY RECORDED BY THE COMPOSITIONAL ZONATIONS OF AMPHIBOLE IN EASTERN HEBEI PROVINCE |
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| Liu Shuwen Lin Qiang Cao Lin.THE P-T-t TRAJECTORY RECORDED BY THE COMPOSITIONAL ZONATIONS OF AMPHIBOLE IN EASTERN HEBEI PROVINCE[J].Journal of Jilin Unviersity:Earth Science Edition,1991(2). |
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| Authors: | Liu Shuwen Lin Qiang Cao Lin |
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| Institution: | Department of Geology |
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| Abstract: | There is clear feature of zonations in Si, Fe, Mg and Mg/(Mg + Fe) for amphibole in Archaean tonalitic gneisses in Malanyu area, eastern Hebei Province.This study shows the component zonations of amphibole is related with amphibole growing, metamorphic processes and conditions. The calculating results by thermodynamics for different zonations give a P-T-t trajectory with anticlockwise trend. This P-T-t path is similar to the one got by using the thermometry and barometry of equilibria mineral associations in different metamorphic stages. The P-T-t trajectorys defined by two methods reflect the evolution of metamorphism in this area. |
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| Keywords: | Malanyu area conations for amphibole thermordynamics P-T-t |
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