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| Keywords | |
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Amushan Formation |
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detrital zircons |
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U-Pb isotopic dating |
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Jiamusi ��Mongolia block |
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strati- graphic regionalization |
| Authors | |
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YANG Zhen-Yuan |
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LIU Huan |
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ZHANG De-Jun |
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LI Xiang |
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SUN Yue-Wu |
| PubMed | |
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Article by Yang, Z. Y. |
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Article by Liu, H. |
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Article by Zhang, D. J. |
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Article by Li, X. |
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Article by Sun, Y. W. |
Detrital zircon U-Pb dating of Upper Carboniferous-Lower Permian Amushan Formation in Bayan Obo area�� Inner Mongolia and its geological implications
YANG Zhen-Yuan, LIU Huan, ZHANG De-Jun, LI Xiang, SUN Yue-Wu
1. ��esearch Center of Paleontology and Stratigraphy��Jilin University��Changchun 130026��China; 2. Tianjin Institute of Geology and Mineral ��esources��CGS��Tianjin 300170��China; 3. Shenyang Center of Geological Survey��CGS��Shenyang 110034��China
Based on the study of the detrital zircon U- - Pb isotopic dating of the sandstone from the type section of Amushan Formation in Bayan Obo area��Inner Mongolia��the zircons from the Lower Permian sandstone include of ages of 354 �� 479 Ma (Paleozoic)��934 �� 1 941 Ma (Proterozoic) and 2 330 �� 2 668 Ma (Siderian- -Neo- archean)�� Combined with the fusulinids of the type section�� the authors conclude that the components of Proterozoic zircons (934 �� 1 941 Ma) in the sandstone of the Amushan Formation should came from the Jiamusi - -Mongolia block��rather than from the North China Plate�� The Amushan Formation bearing fusulinids of the Biozone of Spha- eroschwagerina might be deposited at the continental margins of the Jiamusi- - Mongolia block�� The present research would be helpful for investigating the tectonic evolution of the Xar Moron ��iver Suture and the Paleo- - Asian Ocean�� and gives great support to assign the Inner Mongolia Grassland - - Songhua ��iver Stratigraphic ��egion to the Jiamusi - - Mongolia Stratigraphic Superregion��