| 豫西秦岭群变质岩岩相学特征及早期地壳演化 |
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| 引用本文： | 游振东,索书田,陈能松,钟增球,郝雅. 豫西秦岭群变质岩岩相学特征及早期地壳演化[J]. 地球科学, 1987, 0(3) |
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| 作者姓名： | 游振东 索书田 陈能松 钟增球 郝雅 |
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| 作者单位： | Wuhan College of Geology，Wuhan 430074 |
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| 摘 要： | 豫西秦岭群是东秦岭褶皱带的核心岩系,具角闪岩相变质并有不同程度的混合岩化.空间上呈透镜状构造域,其内部可识别三期变形,韧性强应变带十分发育。变质岩系内主体岩石显示为成熟度不高的陆源碎屑沉积,是活动带沉积的特点,变质泥砂岩沉积的稀土组成及微量元素显示为后太古沉积的特征,而区内广泛分布的变质基性岩墙群,可代表早期的地壳拉张环境。
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| 关 键 词： | 韧性变形 岩相学 秦岭群 地壳演化 变质岩 |
THE METAMORPHIC PETROGRAPHY AND EARLY CRUSTAL EVOLUTION OF QINLING GROUP IN WESTERN HENAN |
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| You Zhendong Suo Shutian Chen Nengsong Zhong Zengqiu Hao Ya. THE METAMORPHIC PETROGRAPHY AND EARLY CRUSTAL EVOLUTION OF QINLING GROUP IN WESTERN HENAN[J]. Earth Science-Journal of China University of Geosciences, 1987, 0(3) |
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| Authors: | You Zhendong Suo Shutian Chen Nengsong Zhong Zengqiu Hao Ya |
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| Abstract: | Being a member of the core complex in the Qinling folded belt the Qinling Group, is highly metamorphosed into amphibolite facies with migmatization. It displays a series of lens-shaped domains delineated by anastomosing ductile deformation zones. The petrography of the metamorphic rock indicates that the predominent biotite gneiss is evolved from argillo-arenaceous rock of terrigenous provenance. The REE pattern and the abundance of minor elements show that they belong to post Archean metasediments. The basic dyke swarms indicate that there developed an extensional crustal environment. |
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| Keywords: | ductile deformation petrography the Qinling Group crustal evolution metamorphic rocks |
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