| 山西五台山-恒山地区晚太古-早元古代若干关键地质问题的再认识:单颗粒锆石离子探针质谱年龄提出的地质制约 |
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| 引用本文： | 王凯怡,郝杰,Simon Wilde,Peter Cawood.山西五台山-恒山地区晚太古-早元古代若干关键地质问题的再认识:单颗粒锆石离子探针质谱年龄提出的地质制约[J].地质科学,2000,35(2):175-184. |
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| 作者姓名： | 王凯怡 郝杰 Simon Wilde Peter Cawood |
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| 作者单位： | 1. 中国科学院地质研究所岩石圈构造演化开放研究实验室 北京 100029;2. School of Applied Geology Curtin University of Technology Perth Australia 6001 |
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| 摘 要： | 大量准确度很高的单颗粒锆石迅谱(SHRIMP)年代学数据表明,五台山-恒山绿岩带形成于2500Ma之前,五台山-恒山绿岩带形成后即与较老的阜平块体拼合。因此,该过程中有大量火山,深成活动及变质作用,是一次重要的造山运动。在1800Ma之前,本区还经历了一次明显的构造热事件,主要表现为在地壳较深水平上大规模的冲断作用,使原来为不同地壳水平的块体处于同一地壳水平。本文还对原五台群下部层位板峪口组和金岗库组的归属及铁堡不整合面提出了新的看法。
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| 关 键 词： | 山西五台山-恒山地区 晚太古-早元古代 单颗粒锆石迅谱年龄 造山运动 |
| 收稿时间： | 1998-09-29 |
| 修稿时间： | 1998年9月29日 |
RECONSIDERATION OF SOME KEY GEOLOGICAL PROBLEMS OF LATE ARCHAEAN-EARLY PROTEROZOIC IN THE WUTAISHAN-HENGSHAN AREA: CONSTRAINTS FROM SHRIMP U-Pb ZIRCON DATA |
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| Wang Kaiyi,Hao Jie,Simon Wilde,Peter Cawood.RECONSIDERATION OF SOME KEY GEOLOGICAL PROBLEMS OF LATE ARCHAEAN-EARLY PROTEROZOIC IN THE WUTAISHAN-HENGSHAN AREA: CONSTRAINTS FROM SHRIMP U-Pb ZIRCON DATA[J].Chinese Journal of Geology,2000,35(2):175-184. |
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| Authors: | Wang Kaiyi Hao Jie Simon Wilde Peter Cawood |
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| Institution: | 1. Institute of Geology, Chinese Academy of Sciences, Beijing 100029;2. School of Applied Geology, Curtin University of Technology, Perth, Australia 6001 |
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| Abstract: | The new precise SHRIMP zircon dates obtained in this study indicate that the Wutaishan Hengshan greenstone belt formed at 2500 Ma ago, immediately after its formation the Wutaishan Hengshan greenstones had amalgamated with the older Fuping block. Therefore, there was intense tectonic, volcanic, plutonic, and metamorphic activities just before 2500 Ma, which was thought to be related to the major episode of plate tectonic activity in the area. There was also another obvious tectono thermal event at about 1800 Ma ago, during that time there was some big scale of thrusts occurred, along the thrusts some deep level of rock units was thrust up then juxtaposed with some high level of rock units. This paper has also stressed some key problems on the famous Tiebao unconformity and the stratigraphic division of the lower part of the Wutai Group, and presenting some new idea on both. |
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| Keywords: | Wutaishan Hengshan area Late Archaean Early Proterozoic Single zircon SHRIMP dates Plate tectonics |
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