| 福建省古生代至中生代大地构造演化的格架 |
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| 引用本文： | 边效曾,褚志贤.福建省古生代至中生代大地构造演化的格架[J].福建地质,1993,12(4):280-291. |
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| 作者姓名： | 边效曾 褚志贤 |
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| 作者单位： | Fujian Bureau of Geology and Mineral Resources，Fuzhou，350003 |
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| 摘 要： | 松溪—长汀断裂带和福州—永定断裂带是控制福建古生代及以后大地构造演化的两条北东东向的断裂带。地质地球化学资料表明,前者是加里东期的地体碰撞带,沿线分布了构造混杂岩、变质超基性岩体、具有角闪岩相和中压矿物的变质岩以及同碰撞型花岗岩体,以后又发育为A型俯冲带;后者是发育于加里东构造层之上的海西期张裂带,在形成海西期的福州—永定海峡的同时,产生了石炭纪海底双模式火山岩及层控铁矿,印支期的碰撞活动使海峡封闭并发育A型俯冲作用。由此,北东东向的松溪—长汀断裂带和福州—永定断裂带可以将福建划分为三个古生代的构造地层地体:闽北地体、闽中地体和闽东南地体。通过对福建省古生代地体构造分析、古地磁测量及古地理重建,展现在我们眼前是:华南(其中包括福建)在古生代中期从冈瓦纳大陆分离出来后,横渡特提斯海,在古生代末至中生代初到达劳亚大陆,与中朝板块碰撞引起了福建地体间强烈的造山运动。
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| 关 键 词： | 大地构造演化 地体构造 格架 福建 |
Framework of Palaeozoic-Mesozoic Tectonic Evolution of Fujian Province |
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| Bian Xiaozeng Chu Zhixian Zhou Weidong.Framework of Palaeozoic-Mesozoic Tectonic Evolution of Fujian Province[J].Geology of Fujian,1993,12(4):280-291. |
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| Authors: | Bian Xiaozeng Chu Zhixian Zhou Weidong |
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| Abstract: | The Songxi-Changding and Fuzhou-Yougding Fault Belts are the two NEE-striking fault belts controlling the Palaeozoic-Mesozoic tectonic evolution in Fujian Province. It is Shown by the geological and geochemical data that the Songxi-Changding Fault Belt is a suture between Caledonian terranes along which there exist tectonic melange, metamorphosed ultramafic rocks, metamorphosed rocks with amphibolite facies and intermediate pressure minerals and syncollision type granites, and was subsequently developed into an A-type subduction zone, and that the Fuzhou-Yongding Fault Belt is a Hercynian taphrogen on the Caledonian tectonic level, The Carboniferous submarine bimodal volcanic rocks and stratabound iron-ore deposits were formed at the same time of the development of the Hercynian FuzhouYongding Channel. In the Indosinian, the collision between the terranes results in the closing of the channel and the A-type subduction. Therefore, both the Songxi-Changding and Fuzhou-Yongding Fault Belts can divide Fujian into the three Palaeozoic tectonic-stratigraphic terranes, namely, Northern Fujian Terrane, Central Fujian Terrane and Southeastern Fujian Terrane. Based on the structural analysis of Palaeozoic terranes, the reconstruction of Palaeographic environment, and the palaeomagnetic measurement, it is inferrde that the South China Block after rifting from the Gondwanal and in the Middle Palaeozoic, ferrys across the Tethys Sea and reaches to the Lauraysia land during the end of Palaeozoic and the beginning of Mesozoic, in which the collision between the South China Block and the SinoKorea Plate results in an extensive orogenic movement among the Fujian terranes. |
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| Keywords: | Fujian Province Palaeozoic-Mesozoic tectonic evolution terrane structure |
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