| 早前寒武纪克拉通问题 |
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| 引用本文： | 江克一.早前寒武纪克拉通问题[J].地质调查与研究,1997(1). |
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| 作者姓名： | 江克一 |
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| 作者单位： | 东北大学!沈阳 |
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| 摘 要： | 早前寒武纪克拉通过去认为是地槽演化的结果。其实不然。本文讨论形成它们变质原岩火山－沉积建造的大地构造条件。现成早前寒武纪克拉通火山沉积盖层的成熟沉积岩丰富了孔兹岩原岩。它们面状展布，经常是很长时期形成的，这改进了识别早前寒武纪克拉通地台式变质原岩建造的标志。这类标志遍及七大洲，高级区和绿岩带。有理由认为，早前寒武纪克拉通是在老克拉通盆地里的地台式火山－沉积建造经变质－混合岩化－塑性流变－硬化的产物。
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| 关 键 词： | 孔兹岩 克拉通盆地 地台式建造 |
PROBLEM ON THE EARLY PRECAMBRIAN CRATONS |
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| Jiang Keyi.PROBLEM ON THE EARLY PRECAMBRIAN CRATONS[J].Geological Survey and Research,1997(1). |
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| Authors: | Jiang Keyi |
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| Institution: | Northeastern University |
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| Abstract: | The Early Precambrian cratons were interpreted previously as the result of geosynclinalevolution. But actually, that is not the case.This paper discusses the geotectonic regime of their protolith the volcano-sedimentaryformations forming these cratons.The present matured sedimentary rocks of the volcano-sedimentary cover strata on the EarlyPrecambrian cratons enrich the protolith of khondalite. Their distribution in areal indicates theirvery long term of formation. That improve, the signs discerning the platform-like protolishformations of the Early Precambrian cratons. Such signs are found in high-grade regions andgreenstone belts all over seven continents. It is reasonably agreed that the Early Precambiancratons are the products of the platform-like volcano-sedimentary formations in old craton basins,that bad been suffered from metamorphism-migmatization-plastic flow and induralization. |
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| Keywords: | Khondalite craton basin platform-like formation |
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