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Geologic relationships and geochronology of the Cenozoic volcanoes and interbedded weathered mantles of Yulinshan in Qiangtang, North Tibet

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Chinese Science Bulletin

Abstract

The Yulinshan accumulations of volcanic rocks and interbedded weathered mantles provide a unique chance for studying the processes and environment of the formation of the planation surface in central Tibetan Plateau. Geochemical,40Ar/39Ar and K/Ar geochronologic investigations of the weathered mantles and high-potassium volcanic rocks reveal that the volcano-weathered mantle accumulations formed under arid or semi-arid subtropic environment in 30–24 Ma. The sole planation surface of the Qiangtang region finally formed in about 20 Ma.

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Authors and Affiliations

  1. Laboratory of Lithosphere Tectonic Evolulion, Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China

    Lin Ding, Yong Zhou, Jingjiang Zhang & Wanming Deng

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  1. Lin Ding
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  2. Yong Zhou
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  3. Jingjiang Zhang
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  4. Wanming Deng
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Ding, L., Zhou, Y., Zhang, J. et al. Geologic relationships and geochronology of the Cenozoic volcanoes and interbedded weathered mantles of Yulinshan in Qiangtang, North Tibet. Chin. Sci. Bull. 45, 2214–2220 (2000). https://doi.org/10.1007/BF02886356

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  • DOI: https://doi.org/10.1007/BF02886356

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