干旱区生态环境知识资源中心(Arid): Rare Earth Phosphates in the Kerch Caviar Ironstones

Arid

DOI	10.2113/RGG20214359
	Rare Earth Phosphates in the Kerch Caviar Ironstones
	Nekipelova, A., V; Sokol, E., V; Kokh, S. N.; Khvorov, P., V
通讯作者	Nekipelova, AV (corresponding author), Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Pr Akad Koptyuga 3, Novosibirsk 630090, Russia.
来源期刊	RUSSIAN GEOLOGY AND GEOPHYSICS
ISSN	1068-7971
EISSN	1878-030X
出版年	2021
卷号	62 期号:10 页码:1188-1207
英文摘要	The mineralogy and contents of major and trace elements (including REE+Y) in bulk samples and separate size fractions of caviar-like ironstones from the Kamysh-Burun deposit (Kerch iron province) are studied to estimate the contributions of different REE+Y species to the total budget. The analyzed ore samples contain MREE adsorbed on Fe3+-(oxy)hydroxides, as well as LREE authigenic phosphates. The predominant rhabdophane-type (Ce(PO4)center dot nH(2)O) phases are enriched in La, Pr, Nd, and Ca, depleted in Ce, and free from Th. The REE carriers belong to solid solution series of two main types: LREE(PO4)center dot nH(2)O - (Ca,Ce,Th)(PO4)center dot H2O (rhabdophane-like phase and brockite) or LREE(PO4)center dot nH(2)O - (Ca,U,Fe3+)((PO4),(SO4))center dot 2H(2)O (rhabdophane-like phase and tristramite). REE phosphates occur most often in the <= 0.25 mm fractions of ironstones, where average and maximum Sigma REE contents (X-av = 606-1954 ppm; X-max = 769-3011 ppm) are comparable with the respective amounts in the Chinese industrial clay-type REE deposits. The Kerch ores are commercially attractive unconventional resources of highly demanded Pr and Nd: they can be extracted at relatively low costs, due to high Pr/Ce and Nd/Ce ratios, while low Th and U reduce the environmental risks from stockpiled wastes.
英文关键词	Kerch ooidal ironstones rare earth elements (REE) authigenic LREE phosphates Pr, Nd, rhabdophane tristramite unconventional REE resources
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000710871700007
WOS关键词	IRON-ORES ; BAHARIYA DEPRESSION ; OOLITIC IRONSTONES ; WESTERN DESERT ; REE DEPOSITS ; MN-OXIDES ; BAYAN OBO ; ELEMENTS ; MINERALIZATION ; GEOCHEMISTRY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368010
作者单位	[Nekipelova, A., V; Sokol, E., V; Kokh, S. N.] Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Pr Akad Koptyuga 3, Novosibirsk 630090, Russia; [Khvorov, P., V] Russian Acad Sci, Ural Branch, South Urals Fed Res Ctr Mineral & Geoecol, Ilmeny Reserve 456317, Miass, Russia
推荐引用方式 GB/T 7714	Nekipelova, A., V,Sokol, E., V,Kokh, S. N.,et al. Rare Earth Phosphates in the Kerch Caviar Ironstones[J],2021,62(10):1188-1207.
APA	Nekipelova, A., V,Sokol, E., V,Kokh, S. N.,&Khvorov, P., V.(2021).Rare Earth Phosphates in the Kerch Caviar Ironstones.RUSSIAN GEOLOGY AND GEOPHYSICS,62(10),1188-1207.
MLA	Nekipelova, A., V,et al."Rare Earth Phosphates in the Kerch Caviar Ironstones".RUSSIAN GEOLOGY AND GEOPHYSICS 62.10(2021):1188-1207.