Bi-bearing and REE-free zálesíite from the Fuka mine, Okayama Prefecture, Japan

Tanaka, Takahiro; Minakawa, Tetsuo; Kusachi, Isao; Tanabe, Mitsuo

doi:10.2465/jmps.081021c

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…10. Comparison of mixite-group mineral compositions from this work (grey areas) with data from Dietrich et al 1969, Aruga & Nakai 1985, Olmi et al 1991, Sejkora et al 1999, Miyawaki et al 2000, Kunov et al 2002, de Baranda et al 2003, Frost et al 2005a, Tanaka et al 2009 1955). In contrast, in the northern Schwarzwald, more REE-than Bi-rich zálesíite formed, although there is no obvious REE source, but Bi-bearing tennantite is common (Staude et al 2010b).…”

Section: Distribution Of Rare-earth Minerals In the Schwarzwaldmentioning

confidence: 77%

“…The REE occur only as trace elements in most rockforming minerals, but can be highly concentrated in minerals like rhabdophane (REEPO 4 •H 2 O), churchite (REEPO 4 •2H 2 O), bastnäsite (REECO 3 F), mixite-group minerals [REECu 6 (AsO 4 ) 3 OH 6 •3H 2 O] or chukhro- 2003,2004) and Walenta & Theye (2005) examined various mixite-group minerals from the Schwarzwald ore district using energy-dispersive electron-microprobe analyses (EDX), but the REE quantification in some of these publications has to be regarded with caution (see below). Information concerning the precise chemical composition and miscibility between end members of natural mixite-group minerals is sparse (Aruga & Nakai 1985, Olmi et al 1991, Sejkora et al 1999, Miyawaki et al 2000, Kunov et al 2002, de Baranda et al 2003, Frost et al 2005a, Tanaka et al 2009. Most of these publications contain analytical data on single minerals.…”

Section: Background Informationmentioning

confidence: 99%

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The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

Göb¹,

Wenzel²,

Bau³

et al. 2011

The Canadian Mineralogist

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Minerals of the rare-earth elements (REE) occur as supergene phases in the Schwarzwald ore district, southwestern Germany. They form by alteration of hydrothermal fluorite-barite-quartz-carbonate veins with various associations, including Cu-Pb, Pb-Zn and Co-Bi-Ag-U assemblages in sandstones, gneisses and granites. The REE minerals, including mixite-group minerals ([REE,Bi,Ca,Pb]Cu 6 (AsO 4 ,AsO 3 OH) 3 OH 6 •3H 2 O), rhabdophane and churchite (REEPO 4 •H 2 O and REEPO 4 •2H 2 O), chukhrovite (Ca 3 REEAl 2 SO 4 F 13 •10H 2 O) and bastnäsite (REECO 3 F), were analyzed by electron microprobe and LA-ICP-MS. In addition, REE concentrations in secondary fluorite, calcite and Mn oxides cogenetic with the REE minerals were determined by LA-ICP-MS. Results of analyses of 74 mixite-group samples from 20 localities in the Schwarzwald ore district show that continuous miscibility is possible between REE and Ca and between Bi and Ca end-members. In contrast, no miscibility seems to exist between the Bi and REE end-members, and only Ca-rich members can accommodate small amounts of both Bi and REE. The REE phosphates churchite and rhabdophane do not occur at the same locality in the Schwarzwald, which is probably dependent on which REE (light or heavy) predominate at a certain locality. Whereas churchite incorporates heavy REE (HREE), rhabdophane prefers light REE (LREE). Dependent on the source of the REE, either HREE or LREE dominate in an alteration fluid and, consequently, only one type of REE phosphate forms. The HREE dominate in such a fluid if REE originate from dissolved "pitchblende", whereas the LREE dominate if the altered host-rock or dissolved fluorite are the source of the REE. The REE contents of Mn oxides and calcite cogenetic with REE-bearing mixite-group minerals show that the REE distribution of secondary minerals can be influenced by each other. Whereas the Mn oxides incorporate Ce 4+ resulting in a positive Ce anomaly, a cogenetic mixite-group mineral develops a negative anomaly, which shows that Ce anomalies are coupled. Calcite intergrown with a mixite-group mineral can only incorporate those REE that are not consumed by the latter. These processes involve the distribution of REE between minerals on the micrometer scale and do not take place until minerals precipitate. However, sorption and complexation processes also take place during transport on a larger scale and produce decoupled Ce anomalies. This interplay between large-and small-scale processes results in a complex redistribution of REE during remobilization.

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Section: Distribution Of Rare-earth Minerals In the Schwarzwaldmentioning

confidence: 77%

Section: Background Informationmentioning

confidence: 99%

The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

Göb¹,

Wenzel²,

Bau³

et al. 2011

The Canadian Mineralogist

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“…[14 -18] In most occurrences, zálesíite contains minor Y and REE, with the exception of the Fuka mine (Japan) where REE-free and Bi-bearing zálesíite has been found. [19] The analogous phosphate -calciopetersite, with ideal formula CaCu 6 [(PO 4 ) 2 (PO 3 OH)(OH) 6 ]· 3H 2 O -was discovered as a new mineral from the abandoned quarry near Domašov and Bystoicí, northern Moravia (Czech Republic). [1] It also crystallises in the hexagonal space group P6 3 /m and forms very rare olive green small radiatiang sprays composed of minute acicular crystals.…”

Section: Introductionmentioning

confidence: 99%

“…Zálesíite minerals are also known to occur at Monte Cervandone (Italy), Vosges (France), Black Forrest (Germany), Dolores prospect (Spain), Gold Hill mine (Utah) and others 14–18. In most occurrences, zálesíite contains minor Y and REE, with the exception of the Fuka mine (Japan) where REE‐free and Bi‐bearing zálesíite has been found 19…”

Section: Introductionmentioning

confidence: 99%

A Raman and infrared spectroscopic study of Ca²⁺ dominant members of the mixite group from the Czech Republic

Čejka

Sejkora

Plášil

et al. 2010

J Raman Spectroscopy

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Mineralogie křemenných žil ložiska cínových rud Hřebečná u Abertam v Krušných horách (Česká republika)

Sejkora¹,

Pauliš²,

Urban³

et al. 2021

Bull Mineral Petrolog

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An extraordinary rich mineral assemblage (more than 35 determined mineral species) has been discovered in quartz greisen mineralization found at dump material of the abandoned Mauritius mine. This mine is situated about 1 km N of the Hřebečná village, 16 km N of Karlovy Vary, Krušné hory Mountains, Czech Republic. The studied mineralization with its textural and mineralogical character differs significantly from the usual fine-grained greisens mined in this area. The primary mineralization is represented by coarse-grained quartz and fluorapatite with sporadic zircon, monazite-(Ce), xenotime-(Y) and very rare cassiterite. Besides common sulphides (arsenopyrite, chalcopyrite, pyrite, sphalerite, tetrahedrite-group minerals), Bi-sulphosalts (aikinite, bismuthinite, berryite, cuprobismutite, emplectite, wittichenite) were determined. Members of the tetrahedrite group also contain increased amounts of Bi - in addition to Bi-rich tennantite-(Zn) and tennantite-(Fe), microscopic zones represented by the not approved Bi-dominant analogue of tennantite („annivite-(Zn)“) were also found. The primary mineralization was intensively affected by supergene processes. Chalcopyrite and sphalerite are replaced by Cu sulphides - especially anilite and digenite, and more rarely by geerite, spionkopite and covellite. Some of the fluorapatite grains in the vein quartz were decomposed and mrázekite, mixite, libethenite, pseudomalachite, hydroxylpyromorphite, metatorbernite as well as rare dzhalindite crystallized in the resulting cavities. However, the most abundant supergene phases are the minerals of the alunite supergroup - crandallite, goyazite, plumbogummite, svanbergite and waylandite. The detailed descriptions, X-ray powder diffraction data, refined unit-cell parameters and quantitative chemical composition of individual studied mineral phases are presented.

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Bi-bearing and REE-free zálesíite from the Fuka mine, Okayama Prefecture, Japan

Cited by 3 publications

References 6 publications

The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

A Raman and infrared spectroscopic study of Ca²⁺ dominant members of the mixite group from the Czech Republic

Mineralogie křemenných žil ložiska cínových rud Hřebečná u Abertam v Krušných horách (Česká republika)

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Bi-bearing and REE-free zálesíite from the Fuka mine, Okayama Prefecture, Japan

Cited by 3 publications

References 6 publications

The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

The Redistribution of Rare-Earth Elements in Secondary Minerals of Hydrothermal Veins, Schwarzwald, Southwestern Germany

A Raman and infrared spectroscopic study of Ca2+ dominant members of the mixite group from the Czech Republic

Mineralogie křemenných žil ložiska cínových rud Hřebečná u Abertam v Krušných horách (Česká republika)

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A Raman and infrared spectroscopic study of Ca²⁺ dominant members of the mixite group from the Czech Republic