Mineralogy and genesis of sapphire in corundum-bearing
xenoliths from the Miocene andesites in the Záhradné, Hubošovce
and Vechec quarries in the Slanské vrchy Mountains (Slovakia)

J 2024

Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia)

MYSL'AN, Pavol; Martin ŠTEVKO; Tomáš MIKUŠ a Tomáš VACULOVIČ

Základní údaje

Originální název

Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia)

Autoři

MYSL'AN, Pavol; Martin ŠTEVKO; Tomáš MIKUŠ a Tomáš VACULOVIČ

Vydání

Geologica Carpathica, Bratislava, Earth Science Institute of the Slowak Academy of Sciences, 2024, 1335-0552

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Slovensko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.500

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/24:00138787

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Slanské vrchy Mts.; Záhradné; Hubošovce; Vechec; xenolith; corundum; sapphire

Štítky

14313010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 9. 2. 2025 19:17, Mgr. Pavla Foltynová, Ph.D.

Anotace

V originále

Sapphires crystals were identified in the corundum-bearing xenoliths in Miocene (Upper to Middle Sarmathian) andesites of the Slanské vrchy Mountains, eastern Slovakia at the Záhradné, Hubošovce and Vechec localities. The sapphire crystals occur in (1) micaceous xenoliths, which are built mostly of dark mica from annite–phlogopite series (biotite), K-feldspars, plagioclase with abundant inclusions of hercynite, ilmenite and Ti-rich magnetite, locally with pyroxenes of enstatite-ferosilite series at the localities Záhradné and Hubošovce. Less abundant are sapphires occurring in cordieritic xenoliths (2), dominantly consisting of cordierite, plagioclase and sillimanite with minor hercynite and ilmenite inclusions discovered in the Vechec quarry. Sapphires are dark blue to light blue with vitreous to diamond lustre and no visible pleochroic colour change forming mostly pseudohexagonal tabular, locally more complex euhedral to subhedral crystals up to 2.0 mm in size with triangular-shaped patterns on crystal faces. Raman spectroscopy showed characteristic corundum peaks at 419 cm−1 A1g mode and 384 cm−1 Eg mode with other peaks assigned to Al2O3 crystal vibrations. Chemical composition (EPMA, LA-ICP-MS) shows typical content of 98.12–99.60 wt. % Al2O3 with increased concentrations of Fe, Ti, Cr, V, Mg and Ga, locally also Na, Ca, K, B and Li. Genesis of corundum-bearing xenoliths interpreted from paragenetic observations and geochemical data shows clear metamorphic trend. Formation of sapphires was caused by incorporation of Al-rich precursor metasediments depleted in silica into the magmatic reservoir, which caused thermal overprint of the precursor mineral assemblage and led to the formation of high temperature mineral association suitable for corundum crystallization. Furthermore, sapphire crystals from the Hubošovce quarry exhibit spinel coronas, which are typically developed from destabilization of corundum during their retrograde development.

Citovat

MYSL'AN, Pavol; Martin ŠTEVKO; Tomáš MIKUŠ a Tomáš VACULOVIČ. Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia). Geologica Carpathica. Bratislava: Earth Science Institute of the Slowak Academy of Sciences, 2024, roč. 75, č. 2, s. 117-131. ISSN 1335-0552. Dostupné z: https://doi.org/10.31577/GeolCarp.2024.06.

@article{2474930,
   author = {Mysl'an, Pavol and Števko, Martin and Mikuš, Tomáš and Vaculovič, Tomáš},
   article_location = {Bratislava},
   article_number = {2},
   doi = {https://doi.org/10.31577/GeolCarp.2024.06},
   keywords = {Slanské vrchy Mts.; Záhradné; Hubošovce; Vechec; xenolith; corundum; sapphire},
   language = {eng},
   issn = {1335-0552},
   journal = {Geologica Carpathica},
   title = {Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia)},
   url = {https://geologicacarpathica.com/browse/archive/?journal_article_no=32999},
   volume = {75},
   year = {2024}
}

TY  - JOUR
ID  - 2474930
AU  - Mysl'an, Pavol - Števko, Martin - Mikuš, Tomáš - Vaculovič, Tomáš
PY  - 2024
TI  - Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia)
JF  - Geologica Carpathica
VL  - 75
IS  - 2
SP  - 117-131
EP  - 117-131
PB  - Earth Science Institute of the Slowak Academy of Sciences
SN  - 13350552
KW  - Slanské vrchy Mts.
KW  - Záhradné
KW  - Hubošovce
KW  - Vechec
KW  - xenolith
KW  - corundum
KW  - sapphire
UR  - https://geologicacarpathica.com/browse/archive/?journal_article_no=32999
N2  - Sapphires crystals were identified in the corundum-bearing xenoliths in Miocene (Upper to Middle Sarmathian) andesites of the Slanské vrchy Mountains, eastern Slovakia at the Záhradné, Hubošovce and Vechec localities. The sapphire crystals occur in (1) micaceous xenoliths, which are built mostly of dark mica from annite–phlogopite series (biotite), K-feldspars, plagioclase with abundant inclusions of hercynite, ilmenite and Ti-rich magnetite, locally with pyroxenes of enstatite-ferosilite series at the localities Záhradné and Hubošovce. Less abundant are sapphires occurring in cordieritic xenoliths (2), dominantly consisting of cordierite, plagioclase and sillimanite with minor hercynite and ilmenite inclusions discovered in the Vechec quarry. Sapphires are dark blue to light blue with vitreous to diamond lustre and no visible pleochroic colour change forming mostly pseudohexagonal tabular, locally more complex euhedral to subhedral crystals up to 2.0 mm in size with triangular-shaped patterns on crystal faces. Raman spectroscopy showed characteristic corundum peaks at 419 cm−1 A1g mode and 384 cm−1 Eg mode with other peaks assigned to Al2O3 crystal vibrations. Chemical composition (EPMA, LA-ICP-MS) shows typical content of 98.12–99.60 wt. % Al2O3 with increased concentrations of Fe, Ti, Cr, V, Mg and Ga, locally also Na, Ca, K, B and Li. Genesis of corundum-bearing xenoliths interpreted from paragenetic observations and geochemical data shows clear metamorphic trend. Formation of sapphires was caused by incorporation of Al-rich precursor metasediments depleted in silica into the magmatic reservoir, which caused thermal overprint of the precursor mineral assemblage and led to the formation of high temperature mineral association suitable for corundum crystallization. Furthermore, sapphire crystals from the Hubošovce quarry exhibit spinel coronas, which are typically developed from destabilization of corundum during their retrograde development.
ER  -

MYSL'AN, Pavol; Martin ŠTEVKO; Tomáš MIKUŠ a Tomáš VACULOVIČ. Mineralogy and genesis of sapphire in corundum-bearing xenoliths from the Miocene andesites in the Záhradné, Hubošovce and Vechec quarries in the Slanské vrchy Mountains (Slovakia). \textit{Geologica Carpathica}. Bratislava: Earth Science Institute of the Slowak Academy of Sciences, 2024, roč.~75, č.~2, s.~117-131. ISSN~1335-0552. Dostupné z: https://doi.org/10.31577/GeolCarp.2024.06.

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