Garnet as a major carrier of the Y and REE in the granitic
rocks: An example from the layered anorogenic granite in the
Brno Batholith, Czech Republic.

J 2014

Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic.

HÖNIG, Sven; Renata ČOPJAKOVÁ; Radek ŠKODA; Milan NOVÁK; David DOLEJŠ et al.

Základní údaje

Originální název

Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic.

Autoři

HÖNIG, Sven; Renata ČOPJAKOVÁ; Radek ŠKODA; Milan NOVÁK; David DOLEJŠ; Jaromír LEICHMANN a Michaela VAŠINOVÁ GALIOVÁ

Vydání

American Mineralogist, Mineralogical Society of America. 2014, 0003-004X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.964

Kód RIV

RIV/00216224:14310/14:00076613

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.2138/am-2014-4728

UT WoS

000342956700011

EID Scopus

2-s2.0-84908167813

Klíčová slova anglicky

Garnet; EMP; LA-ICP-MS; Y+REE mass-balance calculations; A-type granite; Brno Batholith

Štítky

AKR, rivok

Změněno: 8. 4. 2015 13:42, Ing. Andrea Mikešková

Anotace

V originále

Garnet and other rock-forming minerals from A-type granite dykes in the Pre-Variscan Brno Batholith were analyzed to determine relative contributions of individual minerals to whole-rock Y and REE budget and to assess incorporation mechanisms of these elements in garnet. Minor to accessory garnet (<2 vol%) is the essential reservoir for Y+REE in the Hlína granite accounting ~84% Y and 61% REE of the total whole-rock budget. Zircon is another important carrier of REE with ~13% Y and ~11% REE. At least ~21% REE and 1% Y were probably hosted by Th- and U-rich monazite that has been completely altered to a mixture of secondary REE-bearing phases. The contribution of major rock-forming minerals (quartz and feldspars) is low (~1% Y; 10% LREE; ~1% HREE) excluding Eu, which is hosted predominantly by feldspars (~90%). Minor to accessory muscovite and magnetite incorporate ~1% Y and ~2% REE of the whole-rock budget. Magmatic garnet Sps41–46Alm28–44And0–13 Grs6–12Prp0–1 is Y- and HREE-rich (up 1.54 wt% Y; up ~1 wt% total REE), and the Y+REE enter the garnet structure via the menzerite-(Y) substitution. The Y and REE show complex zoning patterns and represent sensitive indicator of garnet evolution, in contrast to a homogeneous distribution of major divalent cations. General outward decrease of Y+REE is a common feature due to the strong partitioning of Y+HREE in the garnet relative to the other phases. REE underwent significant fractionation during growth of early garnet I; the YbN/NdN ratio generally decreases from the core to rim of garnet I. Higher Mn and Al, lower Ca, and Y+REE contents, as well as higher YbN/NdN ratio and more negative Eu anomaly in garnet II overgrowths indicate its crystallization from a more evolved melt. Application of zircon saturation geothermometry provides upper temperature limit of 734 ± 14 °C for the closed-system crystallization. Mineral equilibria reveal that crystallization started at QFM + 1.2, and preferential sequestration of Fe3+ into garnet and magnetite was responsible for progressively reducing conditions. Equilibrium between magnetite, garnet, quartz, and plagioclase, representing the final crystallization stage of the granitic magma, occurred at 658–663 °C and QFM 0 to + 0.8, hence at undercooling of ~75 °C.

Návaznosti

CZ.1.05/1.1.00/02.0068, interní kód MU

Název: CEITEC - středoevropský technologický institut (Akronym: CEITEC)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC - středoevropský technologický institut, 1.1 Evropská centra excelence

Citovat

HÖNIG, Sven; Renata ČOPJAKOVÁ; Radek ŠKODA; Milan NOVÁK; David DOLEJŠ; Jaromír LEICHMANN a Michaela VAŠINOVÁ GALIOVÁ. Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic. American Mineralogist. Mineralogical Society of America., 2014, roč. 99, č. 10, s. 1922-1941. ISSN 0003-004X. Dostupné z: https://doi.org/10.2138/am-2014-4728.

@article{1199378,
   author = {Hönig, Sven and Čopjaková, Renata and Škoda, Radek and Novák, Milan and Dolejš, David and Leichmann, Jaromír and Vašinová Galiová, Michaela},
   article_number = {10},
   doi = {https://doi.org/10.2138/am-2014-4728},
   keywords = {Garnet; EMP; LA-ICP-MS; Y+REE mass-balance calculations; A-type granite; Brno Batholith},
   language = {eng},
   issn = {0003-004X},
   journal = {American Mineralogist},
   title = {Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic.},
   url = {http://www.minsocam.org/msa/ammin/AM_Preprints.html},
   volume = {99},
   year = {2014}
}

TY  - JOUR
ID  - 1199378
AU  - Hönig, Sven - Čopjaková, Renata - Škoda, Radek - Novák, Milan - Dolejš, David - Leichmann, Jaromír - Vašinová Galiová, Michaela
PY  - 2014
TI  - Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic.
JF  - American Mineralogist
VL  - 99
IS  - 10
SP  - 1922-1941
EP  - 1922-1941
PB  - Mineralogical Society of America.
SN  - 0003004X
KW  - Garnet
KW  - EMP
KW  - LA-ICP-MS
KW  - Y+REE mass-balance calculations
KW  - A-type granite
KW  - Brno Batholith
UR  - http://www.minsocam.org/msa/ammin/AM_Preprints.html
L2  - http://www.minsocam.org/msa/ammin/AM_Preprints.html
N2  - Garnet and other rock-forming minerals from A-type granite dykes in the Pre-Variscan Brno Batholith were analyzed to determine relative contributions of individual minerals to whole-rock Y and REE budget and to assess incorporation mechanisms of these elements in garnet. Minor to accessory garnet (<2 vol%) is the essential reservoir for Y+REE in the Hlína granite accounting ~84% Y and 61% REE of the total whole-rock budget. Zircon is another important carrier of REE with ~13% Y and ~11% REE. At least ~21% REE and 1% Y were probably hosted by Th- and U-rich monazite that has been completely altered to a mixture of secondary REE-bearing phases. The contribution of major rock-forming minerals (quartz and feldspars) is low (~1% Y; 10% LREE; ~1% HREE) excluding Eu, which is hosted predominantly by feldspars (~90%). Minor to accessory muscovite and magnetite incorporate ~1% Y and ~2% REE of the whole-rock budget. Magmatic garnet Sps41–46Alm28–44And0–13 Grs6–12Prp0–1 is Y- and HREE-rich (up 1.54 wt% Y; up ~1 wt% total REE), and the Y+REE enter the garnet structure via the menzerite-(Y) substitution. The Y and REE show complex zoning patterns and represent sensitive indicator of garnet evolution, in contrast to a homogeneous distribution of major divalent cations. General outward decrease of Y+REE is a common feature due to the strong partitioning of Y+HREE in the garnet relative to the other phases. REE underwent significant fractionation during growth of early garnet I; the YbN/NdN ratio generally decreases from the core to rim of garnet I. Higher Mn and Al, lower Ca, and Y+REE contents, as well as higher YbN/NdN ratio and more negative Eu anomaly in garnet II overgrowths indicate its crystallization from a more evolved melt. Application of zircon saturation geothermometry provides upper temperature limit of 734 ± 14 °C for the closed-system crystallization. Mineral equilibria reveal that crystallization started at QFM + 1.2, and preferential sequestration of Fe3+ into garnet and magnetite was responsible for progressively reducing conditions. Equilibrium between magnetite, garnet, quartz, and plagioclase, representing the final crystallization stage of the granitic magma, occurred at 658–663 °C and QFM 0 to + 0.8, hence at undercooling of ~75 °C.
ER  -

HÖNIG, Sven; Renata ČOPJAKOVÁ; Radek ŠKODA; Milan NOVÁK; David DOLEJŠ; Jaromír LEICHMANN a Michaela VAŠINOVÁ GALIOVÁ. Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic. \textit{American Mineralogist}. Mineralogical Society of America., 2014, roč.~99, č.~10, s.~1922-1941. ISSN~0003-004X. Dostupné z: https://doi.org/10.2138/am-2014-4728.

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