Geochronology and petrogenesis of orthogneisess from the Pacov
body: implications for the subdivision of the Cambro-Ordovician
peraluminous magmatism and related mineralizations in the
Monotonous and Varied units of the Moldanubian Zone (Bohemian
Massif)

J 2020

Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif)

BURIÁNEK, David, Lenka BUŘIVALOVÁ, Stanislav HOUZAR, Zdeněk LOSOS, Jitka MIKOVÁ et. al.

Basic information

Original name

Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif)

Authors

BURIÁNEK, David (203 Czech Republic, belonging to the institution), Lenka BUŘIVALOVÁ (203 Czech Republic, belonging to the institution), Stanislav HOUZAR (203 Czech Republic), Zdeněk LOSOS (203 Czech Republic, guarantor, belonging to the institution) and Jitka MIKOVÁ (203 Czech Republic)

Edition

Mineralogy and Petrology, Wien, Springer, 2020, 0930-0708

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10504 Mineralogy

Country of publisher

Austria

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.708

RIV identification code

RIV/00216224:14310/20:00115329

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1007/s00710-020-00699-8

UT WoS

000518061200001

Keywords in English

orthogneiss; pre-Variscan greisen; mineral chemistry; Pacov body; Bohemian Massif

Abstract

V originále

Peraluminous orthogneisses represent a typical rock type of the Monotonous and Varied units of the Moldanubian Zone. The most probable setting for the generation of these rocks is the Cambro-Ordovician magmatic event linked to crustal anataxis, which is related to the thermal relaxation of thickened continental crust. According to their geological position, the mineralogy and geochemistry can betraced to the Blaník and Deštná type orthogneisses.The Blaník type is represented by muscovite-biotite to muscovite-tourmaline orthogneisses whose granitic protolith can be generated by muscovite-dominant dehydration melting of metapelites. The chemical heterogeneity of this type suggests magma differentiation, which is manifested by the presence of PLi-Sn-Nb mineralization. Muscovite-biotite to biotite Deštná type orthogneisses were likely generated by the fluid-present melting of immature crustal sources (e.g. metagreywackes and metaigneous rocks) and spatially related to small occurrences of W-bearing mineralization. We applied whole-rock geochemistry combined with mineralogy and zircon U-Pb geochronology to the evolutionary interpretation of one of the most fractionated bodies of Deštná type orthogneisses situated near the village of Pacov. The Pacov orthogneiss is accompanied by pre-Variscan greisens and related tungsten mineralization (ferberite, scheelite, pyrite, and native bismuth). The mineral assemblages of these rock types are modified by the Variscan metamorphic overprint (720±75 °C at 0.65±0.29 GPa). Two petrographically distinct samples of orthogneisses give U–Pb zircon ages of 494±2 Ma (garnet-muscovite orthogneiss) and 485±4Ma (muscovite-biotite orthogneiss).The abundance of inherited pre-magmatic zircon cores (614–578 Ma) most likely documents detrital protoliths derived from erosion of the Ediacaran volcanic arc.

Citovat

BURIÁNEK, David, Lenka BUŘIVALOVÁ, Stanislav HOUZAR, Zdeněk LOSOS and Jitka MIKOVÁ. Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif). Mineralogy and Petrology. Wien: Springer, 2020, vol. 114, No 3, p. 175-197. ISSN 0930-0708. Available from: https://dx.doi.org/10.1007/s00710-020-00699-8.

@article{1622536,
   author = {Buriánek, David and Buřivalová, Lenka and Houzar, Stanislav and Losos, Zdeněk and Miková, Jitka},
   article_location = {Wien},
   article_number = {3},
   doi = {http://dx.doi.org/10.1007/s00710-020-00699-8},
   keywords = {orthogneiss; pre-Variscan greisen; mineral chemistry; Pacov body; Bohemian Massif},
   language = {eng},
   issn = {0930-0708},
   journal = {Mineralogy and Petrology},
   title = {Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif)},
   url = {https://link.springer.com/article/10.1007/s00710-020-00699-8},
   volume = {114},
   year = {2020}
}

TY  - JOUR
ID  - 1622536
AU  - Buriánek, David - Buřivalová, Lenka - Houzar, Stanislav - Losos, Zdeněk - Miková, Jitka
PY  - 2020
TI  - Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif)
JF  - Mineralogy and Petrology
VL  - 114
IS  - 3
SP  - 175-197
EP  - 175-197
PB  - Springer
SN  - 09300708
KW  - orthogneiss
KW  - pre-Variscan greisen
KW  - mineral chemistry
KW  - Pacov body
KW  - Bohemian Massif
UR  - https://link.springer.com/article/10.1007/s00710-020-00699-8
L2  - https://link.springer.com/article/10.1007/s00710-020-00699-8
N2  - Peraluminous orthogneisses represent a typical rock type of the Monotonous and Varied units of the Moldanubian Zone. The most probable setting for the generation of these rocks is the Cambro-Ordovician magmatic event linked to crustal anataxis, which is related to the thermal relaxation of thickened continental crust. According to their geological position, the mineralogy and geochemistry can betraced to the Blaník and Deštná type orthogneisses.The Blaník type is represented by muscovite-biotite to muscovite-tourmaline orthogneisses whose granitic protolith can be generated by muscovite-dominant dehydration melting of metapelites. The chemical heterogeneity of this type suggests magma differentiation, which is manifested by the presence of PLi-Sn-Nb mineralization. Muscovite-biotite to biotite Deštná type orthogneisses were likely generated by the fluid-present melting of immature crustal sources (e.g. metagreywackes and metaigneous rocks) and spatially related to small occurrences of W-bearing mineralization. We applied whole-rock geochemistry combined with mineralogy and zircon U-Pb geochronology to the evolutionary interpretation of one of the most fractionated bodies of Deštná type orthogneisses situated near the village of Pacov. The Pacov orthogneiss is accompanied by pre-Variscan greisens and related tungsten mineralization (ferberite, scheelite, pyrite, and native bismuth). The mineral assemblages of these rock types are modified by the Variscan metamorphic overprint (720±75 °C at 0.65±0.29 GPa). Two petrographically distinct samples of orthogneisses give U–Pb zircon ages of 494±2 Ma (garnet-muscovite orthogneiss) and 485±4Ma (muscovite-biotite orthogneiss).The abundance of inherited pre-magmatic zircon cores (614–578 Ma) most likely documents detrital protoliths derived from erosion of the Ediacaran volcanic arc.
ER  -

BURIÁNEK, David, Lenka BUŘIVALOVÁ, Stanislav HOUZAR, Zdeněk LOSOS and Jitka MIKOVÁ. Geochronology and petrogenesis of orthogneisess from the Pacov body: implications for the subdivision of the Cambro-Ordovician peraluminous magmatism and related mineralizations in the Monotonous and Varied units of the Moldanubian Zone (Bohemian Massif). \textit{Mineralogy and Petrology}. Wien: Springer, 2020, vol.~114, No~3, p.~175-197. ISSN~0930-0708. Available from: https://dx.doi.org/10.1007/s00710-020-00699-8.

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