| 侏罗系——白垩系界线年代研究 |
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| 引用本文： | 罗修泉,李佩贤.侏罗系——白垩系界线年代研究[J].地球学报,1997,18(3):242-247. |
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| 作者姓名： | 罗修泉 李佩贤 |
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| 作者单位： | 中国地质科学院地质研究所;中国地质科学院地质研究所 |
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| 摘 要： | 本文采用界线层型标定地层界线的方法，以河北滦平县井上－大店子和大北沟两界线层型剖面的生物地层研究结果，确定我国陆相侏罗系－白垩系界线在大北沟组与大店子组之间，对滦平县热河群下部及其下伏岩层中的火山岩层进行４０Ａｒ／３９Ａｒ法年代学研究，并推定侏罗系－白垩系界线年龄为１４０±１Ｍａ。
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| 关 键 词： | 界线年代 40Ar/39Ar测年 侏罗系－白垩系界线 |
A Study on the Boundary Age between Jurassic and Cretaceous |
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| LUO Xiu-quan and LI Pei-xian.A Study on the Boundary Age between Jurassic and Cretaceous[J].Acta Geoscientia Sinica,1997,18(3):242-247. |
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| Authors: | LUO Xiu-quan and LI Pei-xian |
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| Institution: | Institute of Geology, CAGS, Beijing;Institute of Geology, CAGS, Beijing |
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| Abstract: | It is agreed that the boundary level of the Jurassic Cretaceous is put in between the Dabeigou Formation (narrowsense) and Dadianzi Formation. The ages of the volcanic rocks from the Jehol(Rehe) Group and its underlying formations in Luanping County of Hebei those have bee measured by means of 40 Ar/ 39 Ar dating .The age of Jurassic-Cretaceous boundary is aroud 140±1 Ma which is recommended in this paper. |
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| Keywords: | boundary age 40 Ar/ 39 Ar dating boundary of the Jurassic-Cretaceous |
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