干旱区生态环境知识资源中心(Arid): Geochemistry and mineralogy of rare earth elements in high-phosphorus ooidal ironstones: A case study of the Kamysh-Burun deposit (Azov-Black Sea iron Province)

Arid

DOI	10.1016/j.oregeorev.2020.103827
	Geochemistry and mineralogy of rare earth elements in high-phosphorus ooidal ironstones: A case study of the Kamysh-Burun deposit (Azov-Black Sea iron Province)
	Sokol, Ella, V; Kokh, Svetlana N.; Kozmenko, Olga A.; Nekipelova, Anna, V; Rudmin, Maxim; Khvorov, Pavel, V; Artemyev, Dmitry A.
通讯作者	Kokh, SN (corresponding author), Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, 3 Koptyug Ave, Novosibirsk 630090, Russia.
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2020
卷号	127
英文摘要	This study is aimed at characterizing the distribution and speciation of the rare earth elements and yttrium (REE + Y) in ooidal ironstones from the Kamysh-Burun deposit (Kerch Peninsula), wit h implications for the depositional environments and contributions of different REE + Y carriers to the ore budget. The Lower Pliocene ooidal ironstone sequence of the so-called Kerch ores, up to 15 m thick, occupies an area of 28 km(2). The ore sequence lies between Miocene - Lower Pliocene shell limestones and Upper Pliocene - Pleistocene sandy and clayey sediments and consists of horizontal ooidal ironstone beds composed mainly of goethite and X-ray amorphous Fe3+-(oxy)hydroxides intercalated with siderite and/or rhodochrosite beds. Iron is a main component in ooidal ironstones (50.03-66.19 wt% Fe2O3 and <= 1.61 wt% FeO), as well as in fresh carbonate ores (-34 wt% FeO and <= 14.70 wt% Fe2O3). The Kerch ores contain up to 4.59 wt% P2O5 and show significant positive correlation between P and Fe (r = 0.75). The bulk ore samples and their coarse (1-10 mm) fractions are goethite-dominated and have similar phase, major- and trace-element, and REE compositions. The fine (<1 mm) fractions are poorer in goethite and P2O5 but enriched in SiO2, Al2O3, Ti, Zr, Y, and Th due to greater percentages of Fe-saponite and fine detrital matter (including very scarce rutile, zircon, monazite, and xenotime). The average Sigma REE values of 400 ppm in bulk ooidal ironstones and 405 ppm in the coarse fractions markedly exceed those in the Post Archean Australian Shale (PAAS). They have similar PAAS-normalized REE + Y patterns, with moderate enrichment in middle REE (MREE), minor Ce* (0.67-1.09), and moderate negative Y* anomalies (0.57-0.70). The fine ore fractions are markedly enriched in Sigma REE (Xav = 858 ppm) mainly due to the presence of authigenic light REE phosphates of rhabdophane-tristramite series with Ce > La approximate to Nd approximate to Ca > Pr > Sm. The Sigma REE content in fresh carbonate ores is below that in PAAS (Xav = 103 ppm), but approaches the latter in oxidized crusts (Xav = 178 ppm). The Kerch ironstones also contain REE-poor early-diagenetic Fe2+ phosphate vivianite (Sigma REE Xav = 0.93 ppm) and Ca-Fe2+ phosphate anapaite (Sigma REE Xav = 6.95 ppm) with typical seawater REE + Y distributions. The ooidal ironstones show MREE-enriched patterns with distinct negative Y* anomalies, which reveals Fe3+-(oxy)hydroxides as chief carriers of adsorbed REE (mainly MREE). The Kerch ironstones accumulated REE progressively due to hysteretic dissolution and precipitation of Fe3+-(oxy)hydroxides in oscillating redox conditions. The diagenetic source of REE stored in ooidal goethite ironstones was inferred from the PAAS-normalized values: Ce-N/Ce-N* vs Nd and Ce-N/Ce-N* vs Y-N/Ho-N discrimination diagrams. In general, the REE + Y budget of the Kerch ooidal ironstones mainly formed during early diagenesis and scavenging from pore water, with a minor contribution of siliciclastic inputs, in the absence of hydrothermalism.
英文关键词	Ooidal ironstones Rare earth elements Fe3+-(oxy)hydroxides Rhabdophane-tristramite Vivianite Anapaite
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000598902700002
WOS关键词	AMORPHOUS FERRIC HYDROXIDE ; OOLITIC IRONSTONES ; VERTICAL-DISTRIBUTION ; BAHARIYA DEPRESSION ; FE OXYHYDROXIDE ; KERCH PENINSULA ; WESTERN DESERT ; MAJOR SINK ; MN-OXIDES ; YTTRIUM
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349097
作者单位	[Sokol, Ella, V; Kokh, Svetlana N.; Kozmenko, Olga A.; Nekipelova, Anna, V] Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, 3 Koptyug Ave, Novosibirsk 630090, Russia; [Rudmin, Maxim] Tomsk Polytech Univ, Div Geol, 30 Lenin Ave, Tomsk 634050, Russia; [Khvorov, Pavel, V; Artemyev, Dmitry A.] Russian Acad Sci, South Urals Fed Res Ctr Mineral & Geoecol, Inst Mineral, Urals Branch, Miass 456317, Russia; [Artemyev, Dmitry A.] South Urals State Univ, Lenin Av 76, Chelyabinsk 454080, Russia
推荐引用方式 GB/T 7714	Sokol, Ella, V,Kokh, Svetlana N.,Kozmenko, Olga A.,et al. Geochemistry and mineralogy of rare earth elements in high-phosphorus ooidal ironstones: A case study of the Kamysh-Burun deposit (Azov-Black Sea iron Province)[J],2020,127.
APA	Sokol, Ella, V.,Kokh, Svetlana N..,Kozmenko, Olga A..,Nekipelova, Anna, V.,Rudmin, Maxim.,...&Artemyev, Dmitry A..(2020).Geochemistry and mineralogy of rare earth elements in high-phosphorus ooidal ironstones: A case study of the Kamysh-Burun deposit (Azov-Black Sea iron Province).ORE GEOLOGY REVIEWS,127.
MLA	Sokol, Ella, V,et al."Geochemistry and mineralogy of rare earth elements in high-phosphorus ooidal ironstones: A case study of the Kamysh-Burun deposit (Azov-Black Sea iron Province)".ORE GEOLOGY REVIEWS 127(2020).