| 华北地台与秦岭地槽构造关系初探 |
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| 引用本文： | 胡德祥
,邓清禄
,杨巍然.华北地台与秦岭地槽构造关系初探[J].地球科学,1987(5). |
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| 作者姓名： | 胡德祥 邓清禄 杨巍然 |
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| 作者单位： | Wuhan College of Geology，Wuhan 430074 |
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| 摘 要： | 边界问题或构造关系问题,一直是地质学家最为关心的问题之一。华北地台与秦岭地槽构造关系的实质是洋壳与陆壳的矛盾统一和相互转化。中晚元古代时,秦岭地槽为洋壳演化区,华北地台为陆壳区,幸岭洋壳板块俯冲至华北陆壳板块之下:黑沟—铁炉子断裂相当俯冲带,其北洛南—栾川断隆是陆壳被改造而具陆缘弧性质;陆缘弧发展晚期在其南缘发育有弧前坳陷;陆缘弧之北的熊耳断坳则为弧后裂陷盆地;陆缘弧与弧后裂陷盆地之间的马超营—石门断裂为前陆断裂带。因此,秦岭地槽与华北地台的具体界线应以中晚元古代时大洋与大陆的分界线——黑沟—铁炉子断裂为准,而马超营—石门断裂仅为陆壳改造区内次级单位的分界.
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| 关 键 词： | 华北地台 秦岭地槽 陆壳 洋壳 大陆边缘 |
PRELIMINARY STUDY OF RELATIONSHIP BETWEEN NORTH CHINA PLATFORM AND QINLING GEOSYNCLINE |
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| Hu Dexiang Deng Qinglu Yang Weiran.PRELIMINARY STUDY OF RELATIONSHIP BETWEEN NORTH CHINA PLATFORM AND QINLING GEOSYNCLINE[J].Earth Science-Journal of China University of Geosciences,1987(5). |
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| Authors: | Hu Dexiang Deng Qinglu Yang Weiran |
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| Abstract: | The Problem of boundary or tectonic relation has been interesting to geologists. The research of the relation between Qinling Geosyncline and North China Platform is of great value in theory as well as in practice. Based on stratigraphy, structure, Petrology and geochemistry, we come to the conclusion as follows:
1. Essentially, the relation between Qinling Geosyncline and North China Platform is the identity and transformation of contradition of oceanic crust and continental crust. In Middle-Late Proterozoic, the. crast of North China Platform was consolidated into continental crust, and Qinling consisted of oceanic crust.
2. The mechanism, through which the oceanic crust was trans-formed into continental crust, is the plate subduction. The Qinling Oceanic Plate was subducted under North China continental plate. Heigou-Tieluzi fracture is situated on the subduction zone.
3. Heigou-Tieluzi fracture is the boundary between Qinling Geosyncline and North China Platform. |
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| Keywords: | North China Platform Qinling Geosyncline continental crust oceanic crust continental margin |
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