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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

Information

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

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