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Sr isotope evolution during chemical weathering of granites

—Impact of relative weathering rates of minerals

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Abstract

The Sr isotopic systematics in the weathering profiles of biotite granite and granite porphyry in southern Jiangxi Province were investigated. The results showed that during the chemical weathering of granites, remarked fractionation occurred between Rb and Sr. During the early stages of chemical weathering of granites, the released Sr/Si and Sr/Ca ratios are larger than those of the parent rocks, and the leaching rate of Sr is higher than those of Si, Ca, K, Rb, etc. Dynamic variations in relative weathering rates of the main Sr-contributing minerals led to fluctuation with time in87Sr/86Sr ratios of inherent and released Sr in the weathering crust of granite. Successive weathering of biotite, plagioclase and K-feldspar made87Sr/86Sr ratios in the weathering residues show such a fluctuation trend as to decrease first, increase, and then decrease again till they maintain stable. This work further indicates that when Sr isotopes are used to trace biogeochemical processes on both the catchment and global scales, one must seriously take account of the preferential release of Sr from dissolving solid phase and the fluctuation of87Sr/86Sr ratios caused by the variations of relative weathering rates of Sr-contributing minerals.

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References

  1. Ma, Y. J., Liu, C. Q., Geochemistry of strontium isotopes in the crust weathering system, Acta Mineralogica Sinica (in Chinese), 1998, 18(3): 350.

    Google Scholar 

  2. Ma, Y. J., Liu, C. Q., Using strontium isotopes to trace nutrient element circulation and hydrochemical evolution within an ecosystem, Advance in Earth Sciences (in Chinese), 1999, 14 (4): 377.

    Google Scholar 

  3. Brantley, S. L., Chesley, J. T., Stillings, L. L., Isotopic ratios and release rates of strontium from weathering feldspars, Geochim. Cosmochim. Acta, 1998, 62(9): 1493.

    Article  Google Scholar 

  4. Blum, J. D., Erel, Y., A silicate weathering mechanism linking increases in marine87Sr/86Sr with global glaciation, Nature, 1995, 373: 415.

    Article  Google Scholar 

  5. Blum, J. D., Erel, Y., Rb-Sr isotope systematics of granitic soil chronosequence: The importance of biotite weathering, Geochim. Cosmochim. Acta, 1997, 61(15): 3193.

    Article  Google Scholar 

  6. Bullen, T., Krabbenhoft, D., Kendall, C., Kinetic and mineralogic controls on the evolution of groundwater chemistry and87Sr/86Srin a sandy silicate aquifer, northern Wisconsin, USA, Geochim. Cosmochim. Acta, 1996, 60: 1807.

    Article  Google Scholar 

  7. Bullen, T., White, A., Blum, A. et al., Chemical weathering of a soil chronosequence on granitoid alluvium: II mineralogic and isotopic constraints on the behavior of strontium, Geochim. Cosmochim. Acta, 1997, 61: 291.

    Article  Google Scholar 

  8. Blum, J. D., Erel, Y., Brown, K.,87Sr/86Sr ratios of Sierra Nevada stream waters: Implications for relative mineral weathering rates, Geochim. Cosmochim. Acta, 1993, 57: 5019.

    Article  Google Scholar 

  9. Ma Yingjun, Trace element and strontium isotope geochemistry during chemical weathering, Ph. D. Dissertation, 1999, Institute of Geochemistry, Chinese Academy of Sciences.

  10. Nesbitt, H. W., Markovics, G., Price, R. C., Chemical processes affecting alkalis and alkaline earths during continental weathering, Geochim. Cosmochim. Acta, 1980, 44: 1659.

    Article  Google Scholar 

  11. Clauer, N., Strontium and argon isotopes in naturally weathered biotites, muscovites and feldspars, Chem. Geol., 1981, 31: 325.

    Article  Google Scholar 

  12. Chen, J., Qiu, G., Lu, H. Y. et al., Variation of summer monsoon intensity on the Loess Plateau of central China during the last 130, 000 yrs based on evidence from Rb and Sr distribution, Chinese Science Bulletin, 1997, 42(6): 473.

    Article  Google Scholar 

  13. Chen, J., An, Z. S., Wang, Y. J. et al., Distribution of Rb and Sr in the Luochuan loess-paleosol sequence of China during the last 800 ka: Implications forpaleomonsoon variations, Science in China, Ser. D, 1999, 42(2): 225.

    Article  Google Scholar 

  14. Faure, G., Principles ofIsotope Geology, 2nd ed, New York: John Wiley & Son, 1986, 117–199.

    Google Scholar 

  15. White, A. F., Blum, A. E., Shultz, M. S. et al., Chemical weathering rates of a soil chronosequence on granitic alluvium: I Quantification of mineralogical and surface area changes and calculation of silicate reaction rates, Geochim. Cosmochim. Acta, 1996, 60(14): 2533.

    Article  Google Scholar 

  16. Miller, E. K., Blum, J. D., Friedland, A. J., Determination of soil exchangeable-cation loss and weathering rates using Sr isotopes, Nature, 1993, 362: 438.

    Article  Google Scholar 

  17. Liu, C. Q., Zhang, J., Li, C. L., Variation in CaCO3 content and Sr isotopic composition of loess and records of paleocli-matic fluctuation, Chinese Science Bulletin, 1999, 44(16): 1512.

    Article  Google Scholar 

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Authors and Affiliations

  1. Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China

    Yingjun Ma

  2. Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, China

    Congqiang Liu

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  1. Yingjun Ma
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  2. Congqiang Liu
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Correspondence to Yingjun Ma.

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Ma, Y., Liu, C. Sr isotope evolution during chemical weathering of granites. Sci. China Ser. D-Earth Sci. 44, 726–734 (2001). https://doi.org/10.1007/BF02907202

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  • DOI: https://doi.org/10.1007/BF02907202

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