LITHODEMIC UNITS OF THE FUSHUI BASIC COMPLEX IN THE NORTH QINLING MOUNTAINS AND ITS MAGMATIC EVOLUTION
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摘要: 中国及邻区大地构造图（１∶５００００００）是最新出版的一份中国大地构造图。该图以旋回演化论和天地合一的地球动力观为指导，详细表示了中国大陆壳形成的时间序列和空间展布、各时代的缝合带和主要断裂带、重要岩石类型的分布及其形成环境。分出古亚洲、特提斯、环太平洋三大造山域（区）、８个造山系和６个前震旦纪克拉通（地台和准地台）；画出了３０余条板块缝合带、２０余条转换断层和走滑断层、１０余条新生代裂谷带和其他重要断裂带５０余条。全面描绘了中国大陆的组成、结构、演化和动力学特征以及中国与几个全球构造带的关系。Abstract: The Neoproterozoic Fushui complex is located on the north side of the Shangnan Danfeng fault zone in the North Qinling. Through 1∶50 000 regional geological mapping, the complex is divided in ascending order into five lithodemic units: the Jinpen medium fine grained meta pyroxenite, Heitangou fine grained dark meta grabbro, Macaogou medium grained meta grabbro, Dingjiagou medium grained meta grabbro diorite and Baliwan medium coarse grained meta amphibole biotite monzonite syenite. These units are called by a joint name the Fushui sequence. The intrusive sequence of the various units is determined on the basis of the contact relationships and features of inclusions contained in rocks. The various units form a relatively complete magmatic evolutionary sequence and have distinct comagmatic evolutionary features in terms of the rock composition, petrochemical composition and trace element and rare earth element compositions. The complex was formed in the active continental margin island arc tectonic setting.
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Key words:
- North Qinling /
- Fushui complex /
- lithodemic unit /
- comagmatic evolution /
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