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Discussion on Le Bas et al. (1997) ‘Oxygen, carbon and strontium isotope study of the carbonatitic dolomite host of the Bayan Obo Fe-Nb-REE deposit, Inner Mongolia, China’, Mineralogical Magazine, 61, 531–41

Published online by Cambridge University Press:  05 July 2018

L. S. Campbell
L. S. Campbell*
Affiliation:
School of Geological Sciences, Centre for Earth and Environmental Science Research (CEESR), Kingston University, Penrhyn Road, Kingston upon Thames, Surrey, KT1 2EE, UK
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Abstract

Some important and interesting data on the O, C and Sr isotopic compositions of rocks associated with the Bayan Obo Fe-Nb-REE deposit have been reported by Le Bas et al. (1997). However, a number of points relating to the interpretation of these data, and also to the terminology adopted, are worthy of further discussion. The essence of this discussion is that some of the geochemical and isotopic signatures found at Bayan Obo are not exclusively consistent with an igneous origin. A replacement hypothesis involving deep-sourced fluids could also explain the pattern of data, if minor carbonatitic intrusions into a sedimentary sequence are considered.

Keywords

carbonatitesstable isotopesrare earth mineralizationreplacementfluoriteBayan Obo
Type
Discussion
Information
Mineralogical Magazine , Volume 63 , Issue 6 , December 1999 , pp. 927 - 931
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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Footnotes

*

Current address: Department of Environmental Resources, Telford Institute of Environmental Systems, The University of Salford, Frederick Road, Salford M6 6PU, UK

References

Campbell, L.S. (1998) Zircon–fluid interaction in the Bayan Obo REE–Nb–Fe ore deposit, Inner Mongolia, China. In Water Rock Interaction: Proceedings of the Ninth International Symposium on Water-Rock Interaction (Arehart, G.B. and Hulston, J.R., eds). Balkema, The Netherlands, pp. 521–3.Google Scholar
Campbell, L.S. and Henderson, P. (1997) Apatite paragenesis in the Bayan Obo REE–Nb–Fe ore deposit, Inner Mongolia, China. Lithos, 42, 89–103.CrossRefGoogle Scholar
Chao, E.C.T., Back, J.M., Minkin, J.A. and Ren, Y. (1992) Host-rock controlled epigenetic, hydrothermal metasomatic origin of the Bayan Obo REE–Fe–Nb ore deposit, Inner Mongolia P.R.C. Appl. Geochem., 7, 443–58.CrossRefGoogle Scholar
Chao, E.C.T., Back, J.M., Minkin, J.A., Tatsumoto, M., Wang, J., Conrad, J.E., McKee, E.H., Hou, Z., Meng, Q. and Huang, S. (1997) The sedimentary carbonate- hosted giant Bayan Obo REE–Fe–Nb ore deposit of Inner Mongolia, China: A cornerstone example for giant polymetallic ore deposits of hydrothermal origin. USGS Bull. 2143, 65 pp. (Also available at: http://pubs.usgs.gov/bulletin/b2143/)Google Scholar
Drew, L.J. and Meng, Q. (1990) Geologic map of the Bayan Obo area, Inner Mongolia, China. Map 1–2057. Miscellaneous Investigations Series, United States Geological Survey.Google Scholar
Drew, L.J., Meng, Q. and Sun, W. (1990) The Bayan Obo Fe–REE–Nb deposits, Inner Mongolia, China. Lithos, 26, 43–65.CrossRefGoogle Scholar
Faure, G. (1986) Principles of isotope geology. 2nd edition. Wiley, 589 pp.Google Scholar
Le Bas, M.J., Keller, J., Tao, K., Wall, F., Williams, C.T. and Zhang, Peishan (1992) Carbonatite dykes at Bayan Obo, Inner Mongolia, China. Min. Petrol., 46, 195–228.CrossRefGoogle Scholar
Le Bas, M.J., Spiro, B. and Yang, X. (1997) Oxygen, carbon and strontium isotope study of the carbonatitic dolomite host of the Bayan Obo Fe–Nb–REE deposit, Inner Mongolia, China. Mineral. Mag., 61, 531–41.CrossRefGoogle Scholar
Liu, T. (1985) Geological and geochemical character of Baiyou Ebo rauhaugite. Acta Petrol. Sinica, 1, 15–28.Google Scholar
Meng, Q. (1989) On structure control of iron ore deposits in Proterozoic ore-bearing carbonate formation located in north margin of the North China Platform: Examples of Bai Yun E Bo iron ore deposits, Inner Mongolia and Da Li Zi iron ore deposits, Jilin Province. Abs. 28th Int. Geol. Congress, 2, 413–4.Google Scholar
Ren, J., Jiang, C., Zhang, Z., Qin, D. and Huang, J. (1987) Geotectonic evolution of China. Springer-Verlag, 218 pp.Google Scholar
Tao, K., Yang, Z., Zhang, P. and Wang, W. (1998) Systematic geological investigation on carbonatite dykes in Bayan Obo, Inner Mongolia, China. Sci. Geol. Sinica, 33, 73–83.Google Scholar
Wang, J., Tatsumoto, M., Li, X., Premo., W.R. and Chao, E.C.T.(1994) A precise (232)Th-(208)Pb chronology of fine-grained monazite: Age of the Bayan Obo REE–Fe–Nb ore deposit, China. Geochim Cosmochim. Acta, 58, 3155–69.CrossRefGoogle Scholar
Wu, C., Yuan, Z. and Bai, G. (1996) Rare earth deposits in China. In Rare Earth Minerals. Chemistry, origin and ore deposits (Jones, A.P., Wall, F. and Williams, C.T., eds). Mineralogical Society Series, 7, Chapman & Hall, London, pp. 281-310.Google Scholar
Yuan, Z., Bai, G., Wu, C., Zhang, Z. and Ye, X. (1992) Geological features and genesis of the Bayan Obo REE ore deposit, Inner Mongolia, China. Appl. Geochem., 7, 429–42.Google Scholar