Conrad J E and McKee E H. 1992. 40Ar/39Ar dating of vein amphibole from the Bayan Obo iron？rare earth element？niobium deposit, Inner Mongolia, China: Constraints on mineralization and deposition of the Bayan Obo Group. Economic Geology, 87 (1): 185-188.
[23]
Le Bas M J. 1999. Sovite and alvikite: Two chemically distinct calciocarbonatites C1 and C2. South African Journal of Geology, 102 (2): 109-121.
[24]
Le Bas M J, Keller J, Tao K J, Wall F, Williams C T and Zhang P S. 1992. Carbonatite dykes at Bayan Obo, Inner Mongolia, China. Mineralogy and Petrology, 46 (3): 195-228.
[25]
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, N China. Mineralogical Magazine, 61 (4):531-541.
[26]
Le Bas M J, Yang X M, Taylor R N, Spiro B, Milton J A and Zhang P S. 2007. New evidence from a calcite？dolomite carbonatite dyke for the magmatic origin of the massive Bayan Obo ore？bearing dolomite marble, Inner Mongolia, China. Mineralogy and Petrology, 90 (3-4): 223-248.
[27]
Liu Y, Williams I S, Chen J, Wan Y and Sun W. 2008. The significance of Paleoproterozoic zircon in carbonatite dykes associated with the Bayan Obo REE？Nb？Fe deposit. American Journal of Science, 308(3): 379-397.
[28]
Yang X M, Yang X Y, Zheng Y F and Le Bas M J. 2003. A rare earth element？rich carbonatite dyke at Bayan Obo, Inner Mongolia, North China. Mineralogy and Petrology, 78 (1-2): 93-110.
Chao E C T, Back J M, Minkin J A and Ren Y C. 1992. Host？rock controlled epigenetic, hydrothermal metasomatic origin of the Bayan Obo REEFe？Nb ore deposit, Inner Mongolia, P R C. Applied Geochemistry, 7 (5): 443-458.
[31]
Chao E C T, Back J M, Minkin J A et al. 1997. The sedimentary carbonate？hosted Giant Bayan Obo REE？Fe？Nb ore deposit of Inner Mongolia, China: A cornerstone example for giant polymetallic ore deposit of hydrothermal origin. U S Geological Survey Bulletin, 2143.
[32]
Wang J, Tatsumoto M, Li X, Premo W R and Chao E C T. 1994. A precise 232Th？208Pb chronology of fine？grained monazite: Age of the Bayan Obo REE？Fe？Nb ore deposit, China. Geochimica et Cosmochimica Acta, 58 (15): 3155-3169.
[33]
Woolley A R. 1989. The spatial and temporal distribution of carbonatites, in Carbonatites？Genesis and Evolution. Edited by K Bell. London: Unwin Hyman.
[34]
Yang X M and Le Bas M J. 2004. Chemical compositions of carbonate minerals from Bayan Obo, Inner Mongolia, China: implications for petrogenesis. Lithos, 72 (1-2): 97-116.
[35]
Yuan Z X, Bai G and Wu C Y. 1992. Geological features and genesis of the Bayan Obo REE ore deposit, Inner Mongolia, China. Applied Geochemistry, 7: 429-442.
[36]
Zhang X M and Spry P G. 1994. Petrological, mineralogical, fluid inclusion, and stable？isotope studies of the Gies gold？silver telluride deposit, Judith Mountains, Montana. Economic Geology and the Bulletin of the Society of Economic Geologists, 89 (3): 602-627.
