| Chronostratigraphy and Stratigraphic Classification of the Cretaceous of the Songliao Basin |
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| 引用本文： | Wang Pujun,Du Xiaodi,Wang Jun and Wang Dongpo Geoenergy Department,Changchun University of Earth Sciences,Changchun,Jilin Earth Sciences Department,Nanjing University,Nanjing,Jiangsu. Chronostratigraphy and Stratigraphic Classification of the Cretaceous of the Songliao Basin[J]. 《地质学报》英文版, 1996, 70(2): 207-218. DOI: 10.1111/j.1755-6724.1996.mp9002008.x |
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| 作者姓名： | Wang Pujun Du Xiaodi Wang Jun and Wang Dongpo Geoenergy Department Changchun University of Earth Sciences Changchun Jilin Earth Sciences Department Nanjing University Nanjing Jiangsu |
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| 作者单位： | Wang Pujun;Du Xiaodi;Wang Jun and Wang Dongpo 1)Geoenergy Department，Changchun University of Earth Sciences，Changchun，Jilin 2)Earth Sciences Department，Nanjing University，Nanjing，Jiangsu |
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| 基金项目： | Note:The study was supported by the China National Natural Science Foundation Grant No 49172107. |
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| 摘 要： | Isotopic ages of synsedimentary clay minerals were directly determined with the ultrasonicscattering-settlement separation-K-Ar dilution technique. The apparent age of black mudstoneis 123 Ma for the Quantou Formation, 111.9-89.0 Ma for the Qingshankou Formation and77.6-76.8 Ma for the upper part of the Nenjiang Formation. The Rb-Sr isochrone age of themuddy limestone-mudstone sequence of the lower part of the Nenjiang Formation is 81 Ma andthat of the muddy evaporite of the middle part of the Quantou Formation is 122.2 Ma. On thebasis of the above isotopic ages, the authors propose a modified scheme of stratigraphic classifi-cation of the Cretaceous of the Songliao basin.
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Chronostratigraphy and Stratigraphic Classification of the Cretaceous of the Songliao Basin |
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| Wang Pujun,Du Xiaodi,Wang Jun and Wang Dongpo Geoenergy Department,Changchun University of Earth Sciences,Changchun,Jilin Earth Sciences Department,Nanjing University,Nanjing,Jiangsu. Chronostratigraphy and Stratigraphic Classification of the Cretaceous of the Songliao Basin[J]. Acta Geologica Sinica (English Edition), 1996, 70(2): 207-218. DOI: 10.1111/j.1755-6724.1996.mp9002008.x |
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| Authors: | Wang Pujun Du Xiaodi Wang Jun Wang Dongpo Geoenergy Department Changchun University of Earth Sciences Changchun Jilin Earth Sciences Department Nanjing University Nanjing Jiangsu |
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| Abstract: | Isotopic ages of synsedimentary clay minerals were directly determined with the ultrasonicscattering-settlement separation-K-Ar dilution technique. The apparent age of black mudstoneis 123 Ma for the Quantou Formation, 111.9-89.0 Ma for the Qingshankou Formation and77.6-76.8 Ma for the upper part of the Nenjiang Formation. The Rb-Sr isochrone age of themuddy limestone-mudstone sequence of the lower part of the Nenjiang Formation is 81 Ma andthat of the muddy evaporite of the middle part of the Quantou Formation is 122.2 Ma. On thebasis of the above isotopic ages, the authors propose a modified scheme of stratigraphic classifi-cation of the Cretaceous of the Songliao basin. |
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| Keywords: | Songliao basin Cretaceous lake transgressive depositional sequence isotopic age stratigraphic classification |
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