Geological position, mineral assemblages and contamination of granitic pegmatites in the Moldanubian Zone, Czech Republic; examples from the Vlastějovice region

Novák, Milan; Kadlec, Tomáš; Gadas, Petr

doi:10.3190/jgeosci.132

Cited by 33 publications

(30 citation statements)

References 25 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Like the the Mount Begbie pegmatites, the Bory pegmatites contain abundant tourmaline, occurrences of Fe,Mn-phosphate minerals, Li-rich sekaninaite (Černý et al 1997(Černý et al ), P-bearing garnet (Breiter et al 2005, and minerals indicating a relatively low pressure of emplacement (andalusite, petalite, sekaninaite;Novák et al 2013). Pegmatites in the Bory district and also elsewhere in the Moldanubian Unit feature high W in columbite and Nb-rutile, and their exsolution products (e.g., Černý et al 2007Černý et al , Novák et al 2008.…”

Section: Comparison To Other Pegmatite Areasmentioning

confidence: 98%

Mineralogy and Geochemistry of Pegmatites on Mount Begbie, British Columbia

Dixon¹,

Cempírek²,

Groat³

2014

Can Mineral

View full text Add to dashboard Cite

The pegmatite group on the northern slope of Mount Begbie, near Revelstoke, B.C., comprises more than 50 relatively small pegmatite bodies. The pegmatites have diverse ranges of mineralogy; most of them are barren with micas and tourmaline as the only accessory minerals, but 12 dikes are more fractionated and correspond to beryl-columbite, beryl-columbite-phosphate, and lepidolite subtypes. Detailed study of tourmaline (dravite, schorl, fluor-elbaite, Mn-rich elbaite), cordierite-sekaninaite, garnet, rare element-bearing silicate minerals (beryl, chrysoberyl, bertrandite, euclase, trilithionite, Li-muscovite, petalite, pollucite), rare element-bearing oxide minerals (columbite-tantalite, bismutotantalite, Nb-rutile, cassiterite, hübnerite, qitianlingite), phosphate minerals (triplite, lithiophilite, Mn-rich apatite, xenotime, monazite), and zircon provides insight into the mineralogy and geochemistry of the individual dikes. Fractionation within the pegmatite group increases from the southeast to the northwest, suggesting that the source pluton may be located to the southeast of the study area at depth, likely related to the Ladybird granite suite. Elevated Be and Li contents in sekaninaite, the occurrence of Mn-rich elbaite in a beryl-columbite-phosphate pegmatite, and the relatively common presence of hübnerite and qitianlingite in the Mount Begbie pegmatite group are unusual compared to rare element pegmatite fields worldwide.

show abstract

Section: Comparison To Other Pegmatite Areasmentioning

confidence: 98%

Mineralogy and Geochemistry of Pegmatites on Mount Begbie, British Columbia

Dixon¹,

Cempírek²,

Groat³

2014

Can Mineral

View full text Add to dashboard Cite

show abstract

“…The rounded tour ma lines stud ied dis play compositional re sem bla nce to tour ma lines oc cur ring in var i ous meta mor phic and ig ne ous bod ies of the Moldanubian and Saxothuringian zones of the Bohe mian Mas sif, in clud ing the Sudetic part of it ( Fig. 8B; e.g., Pieczka, 1996;Burianek andNovák, 2004, 2007;Novák et al, 2004Novák et al, , 2013Breiter et al, 2005;S³aby and Koz³owski, 2005;Žáèek and Sulovský, 2005;Èopja ková et al, 2009). The tour ma lines stud ied are also alike in com po si tion to de tri tal tour ma lines shown to be de rived mainly from the Bo hemian Mas sif, oc cur ring in de pos its of the North Sudetic Synclinorium and Fore-Sudetic Homocline ( …”

Section: Rounded Tourmalinementioning

confidence: 99%

Detrital tourmaline as an indicator of source rock lithology: an example from the Ropianka and Menilite formations (Skole Nappe, Polish Flysch Carpathians)

Salata

2013

View full text Add to dashboard Cite

Tour ma line pop u la tions stud ied from the Campanian-Maastrichtian part of the Ropianka (Up per Cre ta ceous-Paleocene) and Menilite (Oligocene) for ma tions of the Pol ish Carpathians, rep re sent a mix ture of first-cy cle and polycyclic grains. The tour ma lines of the de pos its stud ied dis play very strong re sem blance in terms of op ti cal fea tures and chem i cal com po si tion. They be long mostly to the schorl-dravite se ries with a mi nor con tri bu tion of tour ma lines of foititic or Mg-foititic com po si tion. Euhedral tour ma lines orig i nated from metasedimentary rocks, while the rounded grains crys tal lised in Li-poor gra nitic rocks or in pegmatites, Al-poor and Al-rich metasedimentary rocks. Most of the tour ma lines stud ied crys tal lised dur ing a sin gle igne ous or meta mor phic event. How ever, tour ma lines form ing in evolv ing chem i cal con di tions as well as polymetamorphic grains (hav ing a meta mor phic de tri tal core and meta mor phic overgrowths) are also pres ent. The chem i cal com po si tion of the meta mor phic tour ma lines stud ied in di cates their for ma tion in me dium-grade meta mor phic con di tions. This is sup ported by the crystallisation tem per a ture of the gar net-bi o tite in clu sion pres ent in one of rounded meta mor phic tour ma lines from the Ropianka For ma tion. The euhedral grains de rive from meta sedi ments, di rectly from a mas sif lo cated close to the Skole Basin. The scar city of euhedral grains in the tour ma line pop u la tions stud ied sug gests that their source rocks were poor in these min er als. The di rect sources of rounded tour ma lines (most prob a bly polycyclic grains), may have been Pa leo zoic and Me sozoic sed i men tary rocks of the Skole Ba sin fore land or crys tal line rocks of re mote source ar eas. The ini tial ig ne ous and metamor phic host rocks of the tour ma lines may have been crys tal line do mains of the Bo he mian Mas sif and/or the crys tal line base ment of Brunovistulicum.

show abstract

“…Similar compositional trends were found in beryl from primitive or contaminated pegmatites: the Bountiful Beryl dike in Arizona (Schaller et al 1962, Aurisicchio et al 1988), Mount Cervadonne, d'Ossola Valley, the Alps (Aurisicchio et al 1988, Guastoni et al 2006, the Western Carpathians, Slovakia (Uher & Broska 1995, Uher et al 2010, and Elba Island (Aurisicchio et al 2012). Primitive characteristics of the examined beryl samples may reflect a low degree of fractionation of the host pegmatite (Beryller), a high degree of external Mg-contamination from host metabasites in thin pegmatite dikes (Kovářová, Boněnov; see Novák et al 2013), or a combination of both. High contents of Mg in beryl from the Kožichovice II pegmatite (Table 6, Fig.…”

Section: Chemical Compositions Of Beryl and Its Relation To The Lct Omentioning

confidence: 99%

Iron+magnesium-Bearing Beryl From Granitic Pegmatites: An Empa, La-Icp-Ms, Mössbauer Spectroscopy, and Powder XRD Study

Přikryl¹,

Novák²,

Filip³

et al. 2014

Can Mineral

View full text Add to dashboard Cite

Five samples of blue, bluish green, and green Fe,Mg-enriched beryl from Li-poor granitic pegmatites [beryl-columbite (LCT) pegmatites at Kovářová and Boněnov in the Czech Republic and Val Sissone in Italy; a primitive pegmatite at Beryller, Untersulzbachtal, Austria; and a euxenite (NYF) pegmatite from the Beryl Pit, Quadeville, Ontario] were investigated using EMPA, Mössbauer spectroscopy, LA-ICP-MS, and powder XRD diffraction. The EMPA data show highly heterogeneous (Kovářová, Val Sissone) to rather homogeneous crystals (Boněnov, Beryller, Quadeville), with high variations in Al (1.51-1.91 apfu), Mg (0.01-0.31), Fe tot (0.01-0.18), and Na (0.04-0.37). The substitution CH □ + O R 3+ ↔ CH R + + O R 2+ is dominant and supported by the powder XRD data. LA-ICP-MS revealed notable concentrations of some trace elements: Cs ≤ 7568 ppm (Kovářová), Li ≤ 928 ppm (Quadeville), Sc ≤ 2823 ppm (Val Sissone). Beryl samples have mostly comparable contents of Fe 3+ , ~ 25% at the O-site, but differ in the presence of Fe 2+ at the T(2)-site. Primitive characteristics of some examined beryl (Mg/ (Mg+Fe tot ) = 0.37-0.68 reflect low degree of fractionation of the host pegmatite (Beryller), or high degree of Mg-contamination from host metabasites in the pegmatite dikes (Kovářová, Boněnov). The concentrations and ratios of selected elements, including Fe 3+ /Fe 2+ , in beryl from these Li-poor pegmatites are not feasible for any implications of pegmatite-family affinity or degree of its fractionation except for Li; however, no evident correlation between Li and Cs contents was found.

show abstract

Geological position, mineral assemblages and contamination of granitic pegmatites in the Moldanubian Zone, Czech Republic; examples from the Vlastějovice region

Cited by 33 publications

References 25 publications

Mineralogy and Geochemistry of Pegmatites on Mount Begbie, British Columbia

Mineralogy and Geochemistry of Pegmatites on Mount Begbie, British Columbia

Detrital tourmaline as an indicator of source rock lithology: an example from the Ropianka and Menilite formations (Skole Nappe, Polish Flysch Carpathians)

Iron+magnesium-Bearing Beryl From Granitic Pegmatites: An Empa, La-Icp-Ms, Mössbauer Spectroscopy, and Powder XRD Study

Contact Info

Product

Resources

About