Interaction Of Rare-Metal Minerals With Hydrothermal Fluids: Evidence From Quartz–Epidote Metasomatites Of The Haldzan Buragtag Massif, Mongolian Altai

Macdonald, Ray; Bagiński, Bogusław; Карташов, П. М.; Zozulya, Dmitry; Dzierżanowski, Piotr

doi:10.3749/canmin.1400023

Cited by 12 publications

(13 citation statements)

References 33 publications

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“…The spread of data on a triangular plot of Y-Ce-Nd (Text- fig. 13) shows a trend similar to, but slightly displaced from, the alteration trend shown by hingganite from the metasomatite of the Western zone studied by Macdonald et al (2016).…”

Section: Hingganitementioning

confidence: 56%

“…For this, as in an earlier study of the metasomatite , particular attention is paid to minerals of the chevkinite group (CGM). The CGM, with general formula (REE,Ca) records of the mobility of these elements during the fluid-influenced post-magmatic stages of the deposit.Combining the results of this study and those of Macdonald et al (2016), we comment on the changes in fluid composition as the fluids migrated away from the host massif.…”

Section: Introductionmentioning

confidence: 64%

“…13. Y-Ce-Nd plot to show that the hingganites (closed circles) lie on a trend parallel to, but slightly displaced from, the trend for the hingganites from the more southerly metasomatite in the Western zone (diamonds, triangles and square; Macdonald et al (2016). Both data sets start just within the hingganite-(Ce) field and with progressive alteration show Nd enrichment.…”

Section: Thoritementioning

confidence: 94%

“…This study focusses on a sample from the Western ore zone between trenches #4 and #3. It is complementary to the study by Macdonald et al (2016) of material nearer to the intrusive massif and thus richer in ores.…”

Section: Geological Settingmentioning

confidence: 99%

“…Recent studies of the hydrothermal alteration of the chevkinite group of minerals (CGM) have revealed a diversity of alteration products, dependent, inter alia, on the composition of the host rock, the composition of the hydrothermal fluids and the pressure and temperature at which the alteration proceeded (Jiang 2006;Vlach and Gualda 2007;Bagiński et al 2015;Macdonald et al 2015Macdonald et al a, b, 2016. The diversity has consequences for the mobilization or retention of rare-metals and the significance for the formation of rare-metal deposits.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals

Bagiński

Jokubauskas

Domańska−Siuda

et al. 2016

Acta Geologica Polonica

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ABSTRACT:Bagiński B., Jokubauskas P., Domańska-Siuda J., Kartashov P. and Macdonald, R. 2016 Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals. Acta Geologica Polonica, 66 (3), 473-491. Warszawa.The low-temperature hydrothermal alteration of certain rare-metal minerals is recorded in a quartz-epidote metasomatite from the Tsakhirin Khuduk occurrence in the Khaldzan-Buragtag Nb-REE-Zr deposit, Mongolian Altai. A peralkaline granitic pegmatite was metasomatized by hydrothermal fluids released from associated intrusions, with the formation of, inter alia, chevkinite-(Ce), fergusonite-(Nd) and minerals of the epidote group. The textural pattern indicates recrystallization and coarsening of these phases. Later, low-temperature alteration by fluids resulted in the chevkinite-(Ce) being replaced by complex titanite-TiO 2 -cerite-(Ce)-hingganite-hydroxylbastnäsite-(Ce) assemblages. Calcite formed late-stage veins and patches. The hydrous fluids were poor in F and CO 2 but had high Ca contents.

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Section: Hingganitementioning

confidence: 56%

Section: Introductionmentioning

confidence: 64%

Section: Thoritementioning

confidence: 94%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals

Bagiński

Jokubauskas

Domańska−Siuda

et al. 2016

Acta Geologica Polonica

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Differing responses of zircon, chevkinite-(Ce), monazite-(Ce) and fergusonite-(Y) to hydrothermal alteration: Evidence from the Keivy alkaline province, Kola Peninsula, Russia

2017

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Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland: insights into the formation of a titanite-like phase by hydrothermal alteration

et al. 2022

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Chevkinite-group minerals forming large and common (up to 0.03 vol%) accessory phases in monzodiorites and granodiorites from the Mesoproterozoic anorthosite-mangerite-charnockite-granite (AMCG) suite intrusions, Mazury Complex, north-eastern Poland, range from pristine magmatic types to hydrothermally altered varieties. The unaltered phase is perrierite-(Ce), with the uncommon feature of having Al dominant in the C site. Hydrothermal alteration of the perrierite-(Ce) followed two main trends: one shows depletion in Ca, Fe, Si, Al and Mg, and increasing Ti contents; the other shows increases in Si, Ti and Ca and decreases in light rare-earth elements (LREE), Y and Mg, at about constant Fe content. The second trend resulted in the formation of a phase compositionally similar to titanite. Result of chemical analyses show that the transition from perrierite-(Ce) to the titanite-like phase is sharp; an electron back-scatter diffraction (EBSD) study shows the titanite- like material to be amorphous. The hydrothermal alteration of a chevkinite-group mineral to titanite has commonly been reported in natural sequences but this is the first record of the identification of a titanite-like phase made on the basis of a structural analysis.

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Interaction Of Rare-Metal Minerals With Hydrothermal Fluids: Evidence From Quartz–Epidote Metasomatites Of The Haldzan Buragtag Massif, Mongolian Altai

Cited by 12 publications

References 33 publications

Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals

Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals

Differing responses of zircon, chevkinite-(Ce), monazite-(Ce) and fergusonite-(Y) to hydrothermal alteration: Evidence from the Keivy alkaline province, Kola Peninsula, Russia

Chevkinite-group minerals in selected intrusions of the Mazury Complex, North-Eastern Poland: insights into the formation of a titanite-like phase by hydrothermal alteration

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