| 扬子地块东北缘中元古代的大地构造 |
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| 引用本文： | 张永康,刘聪.扬子地块东北缘中元古代的大地构造[J].地质学刊,1996,20(2):65-71. |
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| 作者姓名： | 张永康 刘聪 |
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| 作者单位： | 江苏省地质矿产厅 副厅长
(张永康)，江苏省地质矿产厅 南京(刘聪) |
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| 摘 要： | 扬子地块东北缘存在四条主要的中元古代变质带，自南向北依次为江南变质带，沿江变质带，云台－张八岭变质带和连云港－泗阳变质带。它们分别为中元古代的古弧后盆地，火山岛弧，裂谷及弧前盆地。扬子地块东北缘中元古代为活动大陆边缘构造体系，苏胶变质造山带应解体，其中一部分属扬子大陆边缘体系。
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| 关 键 词： | 大地构造 构造体系 变质带 扬子地块 中元古代 |
Middle Proterozoic Geotectonics in Northeast Sector of the Yangtze Massif |
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| Zhang Yongkang et alThe.Middle Proterozoic Geotectonics in Northeast Sector of the Yangtze Massif[J].Jiangsu Geology,1996,20(2):65-71. |
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| Authors: | Zhang Yongkang The |
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| Institution: | Zhang Yongkang et al
The Department of Geology & Mineral Resources of Jiangsu Province,Nanjing,210018 |
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| Abstract: | There are four middle Proterozoic metamorphic belts mainly in the northeast sector of Yangtze massif. Those are Jiangnan metamorphic belt, metamorphic belt along the Yangtze River, Yuntai-Zhangbal-ing metamorphic belt and Lianyungang-Siyang metamorphic belt distributed from south to north. The metamorphic belts belong to middle Proterozoic laleoback-arc basin, volcanic arc , rift valley and forearc basin respectively. During middle Proterozoic era, northern Yangtze massif was active continental margin. The reconstruction of tectonic system of the northern Yangtze massif shows that the Presinian Su-Jiao metamorphic orogenic belt has to be classified into north sector of the Yangtze massif and south sector of north China, a-mong which part of the belts belong to the Yangtze continental margin system since no reliable bases for the trench belt found. A number of isotopic ages show that main Yangtze orogenic periods in north China, determined as Indosinian movement, are only a result of reactivated Su-Jiao orogenic belt. |
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| Keywords: | Geotectonics Tectonic system Metamorphic belt Yangtze massif |
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