Radiometric Zircon Ages of a Tuff Sample from the Baishantou Member of Wuyun Formation,Jiayin: A Contribution to the Search for the K‐T Boundary in Heilongjian River Area,China |
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| Authors: | SUZUKI Shigeyuki SUN Ge Ulrich KNITTEL DANHARA Tohru IWANO Hideki |
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| Institution: | 1. Department of Earth Sciences, Okayama University, Okayama 700–8530, Japan;2. Key‐Lab for Evolution of Past Life and Environment, MEC, Jilin University, Changchun 130026, China;3. Paleontological Institute of Shenyang Normal University, Shenyang 110034, China;4. Department of Geosciences, National Taiwan University, Taipei 106, China;5. Clay and Interface Mineralogy, RWTH Aachen University, Germany;6. Kyoto Fission‐Track Co., Ltd., 44–4 Minamitajiri‐cho Omiya Kita‐ku, Kyoto 603–8832, Japan |
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| Abstract: | The existence of the Cretaceous‐Tertiary (K/T) boundary in the non‐marine succession is expected at Jiayin in the Heilongjiang River area, China. Zircons from a tuff sample from the Baishantou Member of Wuyun Formation in Jiayin were analyzed by the laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) U‐Pb dating and fission‐track dating methods. Ages of 64.1±0.7 Ma (U‐Pb) and 61.7±1.8 Ma (fission‐track dating) were obtained, which allow re‐evaluation of a previously reported late Maastrichian age for the tuff layer that was in conflict with the paleontological evidence. These results confirm the Danian age of the section in agreement with the paleontological evidence. |
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| Keywords: | U‐Pb dating fission‐track dating Baishantou section K/T boundary Danian Heilongjiang River area |
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