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Oxygen isotope study of the Suzhou granite

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Abstract

Oxygen isotope studies of the Suzhou granite have been made based on drill-hole samples. In the inner part, the δ18O values are less variable either in the whole-rock, quartz or in feldspar. Oxygen isotopic compositions are in equilibrium between coexisting quartz and feldspar. Data points from the inner part are plotted in a small area in the δ18OQ-δ18Of diagram, indicating that this part has not been affected by meteoric hydrothermal fluids. But the whole-rock δ18O values of the marginal part vary greatly. Oxygen isotopic compositions are in extreme disequilibrium between quartz and feldspar. Data points from the marginal part are displayed with a nearly vertical slope in the δ18OQ-δ18Of diagram, implying that rocks of this part are affected by the meteoric hydrothermal fluids. Extreme water-rock interactions lead to mineralizations of rare-elements (Nb, Ta, as well as Zr, Hf, Th) in the marginal part. Source materials of the Suzhou granite are also discussed in this paper.

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Authors and Affiliations

  1. Department of Earth Sciences, Nanjing University, 210093, Nanjing

    Wang Rucheng, Shen Weizhou, Xu Shijin, Xu Keqin & Lai Mingyuan

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  1. Wang Rucheng
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  2. Shen Weizhou
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  3. Xu Shijin
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  4. Xu Keqin
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  5. Lai Mingyuan
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Additional information

This project was financially supported by the National Natural Science Foundation of China (No. 49673183, 49632080) and by the Doctoral Program Fund of the State Education Committee of China.

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Wang, R., Shen, W., Xu, S. et al. Oxygen isotope study of the Suzhou granite. Chin. J. of Geochem. 17, 128–134 (1998). https://doi.org/10.1007/BF03166834

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  • DOI: https://doi.org/10.1007/BF03166834

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