| 东北地区侏罗-白垩系界线简析 |
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| 引用本文： | 郑少林.东北地区侏罗-白垩系界线简析[J].国土资源,1992(4). |
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| 作者姓名： | 郑少林 |
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| 作者单位： | 地质矿产部沈阳地质矿产研究所 110032 |
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| 摘 要： | 通过近年来东北地区海相侏罗-白垩系界线附近生物地层学,同位素年龄及磁性地层学研究的最新展,简析了目前有关侏罗-白垩系界线划分的意见分歧的焦点,进而从植物化石的角度,将海相、海陆交互相同陆相进沉积联系起来,探讨侏罗-白垩系界线划分的合理性问题,提出将界线划在Ruffprdia-Onychiopsis早期组合与中期组合之间比较可行。
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| 关 键 词： | 东北地区 侏罗-白垩系 界线 |
ON THE JURASSIC-CRETACEOUS BOUNDARY IN NORTHEAST CHINA |
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| Zheng Shaolin.ON THE JURASSIC-CRETACEOUS BOUNDARY IN NORTHEAST CHINA[J].Land & Resources,1992(4). |
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| Authors: | Zheng Shaolin |
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| Abstract: | The paper deals with a problem of the Jurassic-Cretaceous boundary in Northeast China, which analyses the point at issue of the boundary by the aid of recent advances in the research of marine biogenic strata, isotopic age and paleomagnetic near the Jurassic-Cretaceous boundary in eastern Heilongjiang province. The plant fossils are a medium of correlation in the marine beds with terrestrial deposits. The Ruffordia-Onychiopsis flora of the Northeast China is divided into early, middle and late assemblages. The boundary of Jurassic-Cretaceous may be delimited between the early and middle assemblages. |
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| Keywords: | Northeast China Jurassic-Cretaceous Boundary |
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