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Osmium isotope determination on mantle-derived peridotite xenoliths from Panshishan with N-TIMS

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Chinese Science Bulletin

Abstract

The187Os/188Os ratios of spinel lherzolite xenoliths from Panshishan determined with N-TIMS are lower than that of the primitive mantle, which shows depleted mantle characteristics. Their positive correlation with Al2O3/MgO suggests that the geochemical behavior of trace elements Re and Os is similar to that of Al2O3 and MgO respectively during the magmatic evolution and Re-Os isotopic system is largely immune to mantle metasomatism. A model age of 2.8–3.4 Ga obtained by187Os/188Os-Al2O3/ MgO correlation might represent the homogeneous age of the mantle lithosphere beneath the area.

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Authors and Affiliations

  1. Department of Earth and Space Sciences; Advanced Research Center on Earth Science and Astronomy of the Third World Academy of Science, University of Science and Technology of China, 230026, Hefei, China

    Weidong Sun, Zicheng Peng, Xiachen Zhi, Daogong Chen & Zhaorong Wang

  2. Laboratory of Lithosphere Tectonic Evolution, Institute of Geology, Chinese Academy of Sciences, 100029, Beijing, China

    Xinhua Zhou

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  1. Weidong Sun
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  2. Zicheng Peng
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  3. Xiachen Zhi
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  4. Daogong Chen
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  5. Zhaorong Wang
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  6. Xinhua Zhou
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Sun, W., Peng, Z., Zhi, X. et al. Osmium isotope determination on mantle-derived peridotite xenoliths from Panshishan with N-TIMS. Chin. Sci. Bull. 43, 573–575 (1998). https://doi.org/10.1007/BF02883642

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  • DOI: https://doi.org/10.1007/BF02883642

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