XU Jianxin, ZHOU Chuanfang, YANG Huaben, DUAN Mingxin, WEI Xiaoyong, CAI Yanlong, GAO Hu. 2023: Geological characteristics and age of the Luoguhe mudstone in the western section of Mohe basin. Geological Bulletin of China, 42(2-3): 376-384. DOI: 10.12097/j.issn.1671-2552.2023.2-3.015
    Citation: XU Jianxin, ZHOU Chuanfang, YANG Huaben, DUAN Mingxin, WEI Xiaoyong, CAI Yanlong, GAO Hu. 2023: Geological characteristics and age of the Luoguhe mudstone in the western section of Mohe basin. Geological Bulletin of China, 42(2-3): 376-384. DOI: 10.12097/j.issn.1671-2552.2023.2-3.015

    Geological characteristics and age of the Luoguhe mudstone in the western section of Mohe basin

    • We identify a new set of rock assemblage mainly composed of black mudstone interbedded with siltstone, feldspar sandstone and tuff. The rocks are widely mylonitized with isoclinal folds, A lineation, S-C fabric, augen structure and so on.It is named as Luoguhe mudstone.The dating result of zircon LA-ICP-MS U-Pb in tuff interlayer is 176.3±1.1 Ma, indicating that the Luoguhe mudstone was formed in the Early-Middle Jurassic, it thrusted overthrust in Upper Jurassic Mohe Formation.The thrust direction was from NW to SE.The Luoguhe mudstone could be compared with the Lower-Middle Jurassic strata in the Upper Amur Basin and it probably came from the Upper Amur Basin.
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