Compositional evolution (Li, Be) in cordierite-group minerals
from metamorphic and magmatic rocks of the Bory Granulite
Massif, Moldanubian Zone, Czech Republic and its implications
for origin of related granitic pegmatites

J 2025

Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites

HREUS, Sebastián; Jan KOCÁB; Milan NOVÁK; M. VAŠINOVÁ GALIOVÁ; Petr GADAS et. al.

Základní údaje

Originální název

Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites

Autoři

HREUS, Sebastián; Jan KOCÁB; Milan NOVÁK; M. VAŠINOVÁ GALIOVÁ a Petr GADAS

Vydání

Chemical Geology, Elsevier, 2025, 0009-2541

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10505 Geology

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.600 v roce 2024

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1016/j.chemgeo.2025.122668

UT WoS

001442034300001

EID Scopus

2-s2.0-85219744994

Klíčová slova anglicky

Cordierite; Sekaninaite; EPMA; LA-ICP-MS; Compositional trends; Granulite; Migmatite; Pegmatite

Štítky

14315010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 15. 4. 2025 09:44, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Samples of cordierite-group minerals (CGM) from various rocks in the Bory Granulite Massif (BGM), Moldanubian Zone - granulite (1), leucosome to pegmatitic leucosome in migmatites (2), small zoned granitic pegmatites (2) and large, complexly zoned granitic pegmatites (11) were examined by the means of EPMA and LA-ICP-MS. CGM are morphologically and compositionally highly variable from subhedral grains, ∼0.5–5 cm in size, of cordierite (XMg57) from granulite, subhedral grains, < ∼5 cm, of cordierite-sekaninaite (XMg56–44) from leucosome to pegmatitic leucosome, cordierite (XMg60) from graphic unit and subhedral grains to large conic subhedral crystals, up to 0.7 m long, of sekaninaite (XMg28–3) mainly from albite unit of complexly zoned pegmatites. Concentrations of Be and chiefly Li in CGM vary significantly - granulite (Be = 84–89 ppm, Li = 204–242 ppm), leucosome to pegmatitic leucosome (Be = 184–317 ppm, Li = 204–338 ppm), complexly zoned pegmatites (outer and blocky units - Be =150–200, Li = 577–904 ppm; albite unit - Be ≤51 ppm, Li = 572–3662 ppm; ≤0.79 wt% Li2O). The following substitution mechanisms were revealed: homovalent R2+ substitutions - major Mg = Fe in all types of CGM, minor Mg + Fe = Mn in sekaninaite with low XMg, moderate to minor heterovalent substitution NaLi = □ R2+and insignificant substitution NaAl = □ Si in sekaninaite from complexly zoned pegmatites. Textural evolution from small bodies of leucosome to large complexly zoned pegmatites with Li-rich sekaninaite, and to Li-rich lepidolite pegmatites in BGM somewhat resembles evolution of simple anatectic pegmatites to albite-spodumene pegmatites from the Austroalpine Unit Pegmatite Province (Eastern European Alps); however, pegmatites from BGM with Li-bearing sekaninaite and lepidolite + petalite crystallized at lower P ∼ 2 kbar. Variations in concentrations of Be and Li in the individual paragenetic types of CGM and chiefly high Li and very low Be in sekaninaite manifest that pegmatitic melts underwent several steps of magmatic fractionation evident chiefly in complexly zoned pegmatites.

Citovat

HREUS, Sebastián; Jan KOCÁB; Milan NOVÁK; M. VAŠINOVÁ GALIOVÁ a Petr GADAS. Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites. Chemical Geology. Elsevier, 2025, roč. 680, May, s. 1-13. ISSN 0009-2541. Dostupné z: https://doi.org/10.1016/j.chemgeo.2025.122668.

@article{2491219,
   author = {Hreus, Sebastián and Kocáb, Jan and Novák, Milan and Vašinová Galiová, M. and Gadas, Petr},
   article_number = {May},
   doi = {https://doi.org/10.1016/j.chemgeo.2025.122668},
   keywords = {Cordierite; Sekaninaite; EPMA; LA-ICP-MS; Compositional trends; Granulite; Migmatite; Pegmatite},
   language = {eng},
   issn = {0009-2541},
   journal = {Chemical Geology},
   title = {Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites},
   url = {https://doi.org/10.1016/j.chemgeo.2025.122668},
   volume = {680},
   year = {2025}
}

TY  - JOUR
ID  - 2491219
AU  - Hreus, Sebastián - Kocáb, Jan - Novák, Milan - Vašinová Galiová, M. - Gadas, Petr
PY  - 2025
TI  - Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites
JF  - Chemical Geology
VL  - 680
IS  - May
SP  - 1-13
EP  - 1-13
PB  - Elsevier
SN  - 00092541
KW  - Cordierite
KW  - Sekaninaite
KW  - EPMA
KW  - LA-ICP-MS
KW  - Compositional trends
KW  - Granulite
KW  - Migmatite
KW  - Pegmatite
UR  - https://doi.org/10.1016/j.chemgeo.2025.122668
N2  - Samples of cordierite-group minerals (CGM) from various rocks in the Bory Granulite Massif (BGM), Moldanubian Zone - granulite (1), leucosome to pegmatitic leucosome in migmatites (2), small zoned granitic pegmatites (2) and large, complexly zoned granitic pegmatites (11) were examined by the means of EPMA and LA-ICP-MS. CGM are morphologically and compositionally highly variable from subhedral grains, ∼0.5–5 cm in size, of cordierite (XMg57) from granulite, subhedral grains, < ∼5 cm, of cordierite-sekaninaite (XMg56–44) from leucosome to pegmatitic leucosome, cordierite (XMg60) from graphic unit and subhedral grains to large conic subhedral crystals, up to 0.7 m long, of sekaninaite (XMg28–3) mainly from albite unit of complexly zoned pegmatites. Concentrations of Be and chiefly Li in CGM vary significantly - granulite (Be = 84–89 ppm, Li = 204–242 ppm), leucosome to pegmatitic leucosome (Be = 184–317 ppm, Li = 204–338 ppm), complexly zoned pegmatites (outer and blocky units - Be =150–200, Li = 577–904 ppm; albite unit - Be ≤51 ppm, Li = 572–3662 ppm; ≤0.79 wt% Li2O). The following substitution mechanisms were revealed: homovalent R2+ substitutions - major Mg = Fe in all types of CGM, minor Mg + Fe = Mn in sekaninaite with low XMg, moderate to minor heterovalent substitution NaLi = □ R2+and insignificant substitution NaAl = □ Si in sekaninaite from complexly zoned pegmatites. Textural evolution from small bodies of leucosome to large complexly zoned pegmatites with Li-rich sekaninaite, and to Li-rich lepidolite pegmatites in BGM somewhat resembles evolution of simple anatectic pegmatites to albite-spodumene pegmatites from the Austroalpine Unit Pegmatite Province (Eastern European Alps); however, pegmatites from BGM with Li-bearing sekaninaite and lepidolite + petalite crystallized at lower P ∼ 2 kbar. Variations in concentrations of Be and Li in the individual paragenetic types of CGM and chiefly high Li and very low Be in sekaninaite manifest that pegmatitic melts underwent several steps of magmatic fractionation evident chiefly in complexly zoned pegmatites.
ER  -

HREUS, Sebastián; Jan KOCÁB; Milan NOVÁK; M. VAŠINOVÁ GALIOVÁ a Petr GADAS. Compositional evolution (Li, Be) in cordierite-group minerals from metamorphic and magmatic rocks of the Bory Granulite Massif, Moldanubian Zone, Czech Republic and its implications for origin of related granitic pegmatites. \textit{Chemical Geology}. Elsevier, 2025, roč.~680, May, s.~1-13. ISSN~0009-2541. Dostupné z: https://doi.org/10.1016/j.chemgeo.2025.122668.

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