The Brno Batholith: an insight into the magmatic and metamorphic evolution of the Cadomian Brunovistulian Unit,eastern margin of the Bohemian Massif

LEICHMANN, Jaromír and Volker HOECK. The Brno Batholith: an insight into the magmatic and metamorphic evolution of the Cadomian Brunovistulian Unit,eastern margin of the Bohemian Massif. Journal of Geosciences. Praha: Czech geol.Soc, 2008, vol. 53, No 1, p. 281-305, 24 pp. ISSN 1802-6222.

Basic information

• Original name: The Brno Batholith: an insight into the magmatic and metamorphic evolution of the Cadomian Brunovistulian Unit,eastern margin of the Bohemian Massif
• Name in Czech: Brněnský batolit, pohled na magmatický a metamorfní vývoj kadomského brunovistulika na východním okraji českého masivu
• Authors: LEICHMANN, Jaromír (203 Czech Republic, guarantor) and Volker HOECK (40 Austria).
• Edition: Journal of Geosciences, Praha, Czech geol.Soc, 2008, 1802-6222.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: Czech Republic
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/08:00028036
• Organization unit: Faculty of Science
• UT WoS: 000207802500005
• Keywords (in Czech): Brněnský batolit; Brunovistulicum; granity; ofiolity; Gondwana; Petrologie
• Keywords in English: Brno Batholith; Brunovistulicum; granites; ophiolites; Gondwana; petrology
• Tags: Brno Batholith, Brunovistulicum, Gondwana, Granites, ophiolites, petrology
• Tags: International impact, Reviewed

Abstract

The Brno Batholith, a part of the larger Brunovistulian Unit, consists of three genetically independent complexes, Western Granitoid Complex (part of the Thaya Terrane), Ophiolite Belt (formerly Metabasite Zone or Central Basic Belt), and Eastern Granitoid Complex (part of the Slavkov Terrane). The field with geochronological evidence indicate younger age of both granitoid complexes compared with the ophiolite. The composition of the Eastern Granitoid Complex (not newly studied in this paper) points to a relatively primitive Cadomian volcanic-arc environment. The Ophiolite Belt comprises a tilted segment of an almost complete metamorphosed ophiolite sequence with lithologically and geochemically obvious suprasubduction signature. Three main granite suites, with distinct S, I, and A type affinities, are exposed in the Western Granitoid Complex. Abundance of crustal xenoliths, complex morphological zircon population, overall S type chemistry, as well as geophysical and petrological evidence for basalt underplating, all point to the origin of the Tetčice suite via melting of the older metasedimentary crust. The Rena suite consists of I type volcanic-arc granodiorites to granites, whereas small intrusions of granites with certain A type affinity are characteristic of the Hlína suite. Equivalents of all three suits were recognized in the northern part of the Dyje Batholith, which represents the direct continuation of the western branch of the Brno Batholith. The geological structure and geochronological data from both the Brno and Dyje batholiths exhibit some similarities with those documented in the Eastern Desert in Egypt. This may indicate a probable Gondwana affinity to the whole Brunovistulian assembly.

Abstract (in Czech)

The Brno Batholith, a part of the larger Brunovistulian Unit, consists of three genetically independent complexes, Western Granitoid Complex (part of the Thaya Terrane), Ophiolite Belt (formerly Metabasite Zone or Central Basic Belt), and Eastern Granitoid Complex (part of the Slavkov Terrane). The field with geochronological evidence indicate younger age of both granitoid complexes compared with the ophiolite. The composition of the Eastern Granitoid Complex (not newly studied in this paper) points to a relatively primitive Cadomian volcanic-arc environment. The Ophiolite Belt comprises a tilted segment of an almost complete metamorphosed ophiolite sequence with lithologically and geochemically obvious suprasubduction signature. Three main granite suites, with distinct S, I, and A type affinities, are exposed in the Western Granitoid Complex. Abundance of crustal xenoliths, complex morphological zircon population, overall S type chemistry, as well as geophysical and petrological evidence for basalt underplating, all point to the origin of the Tetčice suite via melting of the older metasedimentary crust. The Rena suite consists of I type volcanic-arc granodiorites to granites, whereas small intrusions of granites with certain A type affinity are characteristic of the Hlína suite. Equivalents of all three suits were recognized in the northern part of the Dyje Batholith, which represents the direct continuation of the western branch of the Brno Batholith. The geological structure and geochronological data from both the Brno and Dyje batholiths exhibit some similarities with those documented in the Eastern Desert in Egypt. This may indicate a probable Gondwana affinity to the whole Brunovistulian assembly.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)