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Detrital Zircon U-Pb Dating of Nanshuangyashan Formation in the Jiamusi Massif, NE China and its Tectonic Implications

查看全文 作　　者：CUI [1,2]Weilong;ZENG [3,4]Zhen;ZHANG [3]Xingzhou;LIU [3]Zhenghong;WANG [3]Shijie;PU [3]Jianbin;FU [3]Qiulin;GUO [3]Ye 高影响力作者 机构地区：[1]State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;[2]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;[3]College of Earth Sciences,Jilin University,Changchun 130061,China;[4]China Aerospace Academy of Architectural Design and Research Co.,Ltd,Beijing 100162,China高影响力机构 出　　处：《Acta Geologica Sinica(English Edition)》索引2019年第93卷第5期,共21页高影响力期刊 基　　金：financially supported by National Natural Science Foundation of China (Grant No. 41474081);the projects from China Geological Survey(Grant No. 1212011120973) 摘　　要：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. 关 键 词：Jiamusi MASSIF Nanshuangyashan FORMATION Late TRIASSIC DETRITAL zircon NE China
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