Detrital Zircon U-Pb Dating of Nanshuangyashan Formation in the Jiamusi Massif, NE China and its Tectonic Implications
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We are grateful to Yang Yueheng and Ma Qian of the Institute of Geology and Geophysics, Chinese Academy of Sciences (Beijing), China, for their advice and assistance during Lu-Hf isotope analyses. We thank the Key Laboratory of Mineral Resources Evaluation in Northeast Asia, Ministry of Land and Resources, Jilin University, Changchun, China for assistance in zircon U-Pb dating. The final version of this paper benefited from perceptive comments by Li Shan (Guest Editor) and two anonymous reviewers. This study is financially supported by National Natural Science Foundation of China (Grant No. 41474081) and the projects from China Geological Survey (Grant No. 1212011120973).

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    Abstract:

    A suite of the fossil-rich marine-land interbedded strata (Nanshuangyashan Formation) is distributed at the eastern margin of the Jiamusi massif in the eastern Heilongjiang Province, NE China. The authors had recently discovered a suite of arkose beneath the marine-land interbedded strata, which overlays unconformably on the Permain granite in the eastern margin of the Jiamusi massif. The LA-ICP-MS zircon U-Pb dating indicate that all detrital zircons from the analysed four arkose samples show the four population ages of >800 Ma, 538–481 Ma, 269–250 Ma and 223–215 Ma. The former three population ages are widely recorded in the Jiamusi-Khanka massif and the Songnen massif. The later group is the minimal age population in the analyzed samples, limiting the sedimentation time of the arkoses occurred after the Late Triassic. At present, the minimal age population is not recorded in the Jiamusi massif, but the granites with the ages of 228–210 Ma are widely distributed in the Songnen-Zhangguangcai Range massif and the Khanka massif. The predominantly Permian zircons are characterized by oscillatory zoning and euhedral shapes, with variable zircon εHf(t) values (?5.5 to +11.2), indicating that they were derived from mixture sources, possibly mixed with components of the Songnen-Zhangguangcai Range massif and the Jiamusi-Khanka massif. These results, combined with regional analyses, indicate that the closing of Mudanjiang ocean and Panthalassa ocean possibly existed from Early Permian to Late Triassic.

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CUI Weilong, ZENG Zhen, ZHANG Xingzhou, LIU Zhenghong, WANG Shijie, PU Jianbin, FU Qiulin, GUO Ye.2019. Detrital Zircon U-Pb Dating of Nanshuangyashan Formation in the Jiamusi Massif, NE China and its Tectonic Implications[J]. Acta Geologica Sinica(),93(5):1559-1579

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History
  • Received:May 15,2019
  • Revised:August 14,2019
  • Online: October 29,2019
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