Rare Earth Contents Of Selected Source Minerals

TABLE 2
RARE EARTH CONTENTS OF SELECTED SOURCE MINERALS^{1, 2}

(Percentage of total rare-earth oxide)

			Rare earth element symbol
Primary source	Country	Location	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y
Bastn-site	China	Bayan Obo, Nei Mongol-	23.00	50.00	6.20	18.50	0.80	0.20	0.70	0.10	0.10	NA	NA	NA	NA	NA	NA
		Autonomous Region³
Do.	do.	Dechang, Sichuan-	35.63	43.81	4.73	13.06	1.22	0.23	0.52	0.06	0.09	0.05	0.04	0.01	0.06	NA	0.40
		Province⁴
Do.	do.	Maoniuping, Sichuan-	29.49	47.56	4.42	15.18	1.24	0.23	0.65	0.12	0.21	0.05	0.06	0.04	0.05	0.01	0.70
		Province⁴
Do.	do.	Weishan, Shandong-	35.46	47.76	3.95	10.90	0.79	0.13	0.53	0.14	NA	NA	NA	NA	0.03	NA	0.76
		Province⁴
Do.	United States	Mountain Pass, CA⁵	34.00	48.80	4.20	11.70	0.79	0.13	0.21	NA	NA	NA	NA	NA	NA	NA	0.12
Loparite	Russia	Revda, Murmansk-	25.00	50.50	5.00	15.00	0.70	0.09	0.60	NA	0.60	0.70	0.80	0.10	0.20	0.15	1.30
		Oblast⁶
Monazite	Australia	Mount Weld Central-	23.88	47.55	5.16	18.13	2.44	0.53	1.09	0.09	0.25	0.03	0.06	0.01	0.03	NA	0.76
		Lanthanide, Western-
		Australia⁷
Do.	China	Nangang, Guangdong-	23.00	42.70	4.10	17.00	3.00	0.10	2.00	0.70	0.80	0.12	0.30	NA	2.40	0.14	2.40
		Province⁴
Do.	India	Manavalakurichi,-	22.00	46.00	5.50	20.00	2.50	0.02	1.20	0.06	0.18	0.02	0.01	0.00	0.00	0.00	0.45
		Tamil Nadu⁸
Rare-earth laterite	China	Xunwu, Jiangxi-	38.00	3.50	7.41	30.18	5.32	0.51	4.21	0.46	1.77	0.27	0.88	0.13	0.62	0.13	10.07
		Province⁴
Do.	do.	Xinfeng, Jiangxi-	27.26	3.23	5.62	17.55	4.54	0.93	5.96	0.68	3.71	0.74	2.48	0.27	1.13	0.21	24.26
		Province⁴
Do.	do.	Longnan, Jiangxi	2.18	<1.09	1.08	3.47	2.34	<0.37	5.69	1.13	7.48	1.60	4.26	0.60	3.34	0.47	64.90
		Province⁴
Xenotime	do.	Southeast Guangdong-	1.20	3.00	0.60	3.50	2.20	0.20	5.00	1.20	9.10	2.60	5.60	1.30	6.00	1.80	59.30
		Province⁹
Do., do. Ditto. NA Not available.
¹Data are rounded to no more than three significant digits; rows may not add to 100 percent.
²Rare earths are listed in order of atomic number except yttrium, which is listed after the last of the heavy rare earth lanthanide elements.
³Zang, Zhang Bao, Lu, Ke Yi, King, Kue Chu, Wei, Wei Cheng, and Wang, Wen Cheng, 1982, Rare-earth industry in China: Hydrometallurgy, v. 9, no. 2, p. 205-210.
⁴Yang, Xiaosheng, and Zhi Li, Ling, 2014, China-s rare earth ore deposits and beneficitation techniques: ERES 2014-1st European Rare Earth Resources Conference, Milos, Greece, April 4-7, 11 p.
⁵Molycorp, Inc., 2015, Form 10-K-2014: Greenwood Village, CO, Molycorp, Inc., 145 p. (Accessed June 30, 2016, at http://www.molycorp.com/investors.)
⁶Hedrick, J.B., Sinha, S.P., and Kosynkin, V.D., 1997, Loparite, a rare-earth ore: Journal of Alloys and Compounds, v. 250, p. 467-470.
⁷Lynas Corp. Ltd., 2012, Increase in Mt Weld resource estimate for the Central Lanthanide deposit and Duncan deposit, January 18.-
⁸Patra, R.N., 2014, Latest scenario in rare earth and atomic minerals in India: PDAC Convention 2014, Toronto, Ontario, Canada, March 2-4, 42 p.
⁹Nakamura, Shigeo, 1988, China and rare metals-Rare earth: Industrial Rare Metals, no. 94, May, p. 23-28.