Diversity of Ti–Sn–W–Nb–Ta oxide minerals in the classic granite-related magmatic–hydrothermal Cínovec/Zinnwald Sn–W–Li deposit (Czech Republic)

Breiter, Karel; Korbelová, Zuzana; Chládek, Štěpán; Uher, Pavel; Knésl, Ilja; Rambousek, Petr; Hönig, Sven; Šešulka, Vojtěch

doi:10.1127/ejm/2017/0029-2650

Cited by 38 publications

(12 citation statements)

References 29 publications

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“…The ixiolite displays low Mn/(Mn + Fe) ratios (0.10-0.15). Similar ixiolite was also found as a relatively scarce mineral phase in high-F granites from the Hub stock in the Krásno-Horní Slavkov ore district [5], Podlesí granite stock [4] and Cínovec granite cupola [1,3]. However, ixiolite from the Hub and Podlesí granite stock and from the Cínovec granite cupola displays higher Mn/(Mn + Fe) ratios (0.14-0.37).…”

Section: Discussionsupporting

confidence: 60%

“…Thus, the aim of the presented paper is a detailed description of mineralised granites, including their mineralogy and the composition of Nb-Ta-Ti minerals. The composition of Nb-Ta-Ti minerals was further correlated with distinctly better described Nb-Ta-Ti minerals from the Czech part of the Krušné Hory/Erzgebirge region [1][2][3][4][5]. The Krušné Hory/Erzgebirge batholith consists of three individual plutons: Western, Middle and Eastern, each representing an assembly of shallowly emplaced granite units about 6-10 km paleodepth, with a maximum preserved vertical thickness of the pluton 10-13 km below the present surface level [12,13].…”

Section: Introductionmentioning

confidence: 81%

“…In all of these highly fractionated granites, Nb and Ta are predominantly hosted in Nb-Ta-rich rutile and, to a lesser extent, in columbite-group minerals [1][2][3][4][5]40] (Figure 8). The columbite-group minerals from the Geyersberg and Podlesí [4] granite stocks display relatively low Mn/(Mn + Fe) ratios, ranging from 0.07 to 0.2.…”

Section: Discussionmentioning

confidence: 99%

“…The columbite-group minerals from the Geyersberg and Podlesí [4] granite stocks display relatively low Mn/(Mn + Fe) ratios, ranging from 0.07 to 0.2. The columbite-group minerals from the Krásno-Horní Slavkov district [5] and the Cínovec granite cupola [1][2][3] have a highly variable Mn/(Mn + Fe) ratio, ranging from 0.15 to 0.9. A similarly wide variation was observed in highly fractionated granites from Cornwall, UK and Beauvoir in France [40,41].…”

Section: Discussionmentioning

confidence: 99%

“…In the Krušné Hory/Erzgebirge region, these minerals were described in the past by Johan and Johan [1], Rub et al [2] and Breiter [3] from the Cínovec granite cupola, by Breiter et al [4] from the Podlesí granite stock and by René and Škoda [5] from the Krásno-Horní Slavkov ore district in the Slavkovský Les Mts. In the German part of the Krušné Hory/Erzgebirge region, these minerals occur especially in the Sauberg, Vierung and Geyersberg granite stocks.…”

Section: Introductionmentioning

confidence: 98%

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Nb–Ta–Ti Oxides in Topaz Granites of the Geyersberg Granite Stock (Erzgebirge Mts., Germany)

René

2019

Minerals

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Oxide minerals (Nb–Ta-rich rutile, columbite-group minerals and W-bearing ixiolite) represent the most common host for Nb, Ta and Ti in high-F, high-P2O5 Li-mica granites and related rocks from the Geyersberg granite stock in the Krušné Hory/Erzgebirge Mts. batholith. This body forms a pipe like granite stock composed of fine- to middle-grained, porphyritic to equigranular high-F, high-P2O5 Li-mica granites, which contain up to 6 vol. % of topaz. Intrusive breccia’s on the NW margin of the granite stock are composed of mica schists and muscovite gneiss fragments enclosed in fine-grained aplitic and also topaz- and Li-mica-bearing granite. Columbite group minerals occur usually as euhedral to subhedral grains that display irregular or patched zoning. These minerals are represented by columbite-(Fe) with Mn/(Mn + Fe) ratio ranging from 0.07 to 0.15. The rare Fe-rich W-bearing ixiolite occurs as small needle-like crystals. The ixiolite is Fe-rich with relatively low Mn/(Mn + Fe) and Ta/(Ta + Nb) values (0.10–0.15 and 0.06–0.20, respectively). Owing to the high W content (19.8–34.9 wt. % WO3, 0.11–0.20 apfu), the sum of Nb + Ta in the ixiolite does not exceed 0.43 apfu. The Ti content is 1.7–5.7 wt. % TiO2 and Sn content is relatively low (0.3–4.1 wt. % SnO2).

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