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Pregled bibliografske jedinice broj: 1066780

The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone


Slovenec, Damir; Belak, Mirko; Mišur, Ivan; Šegvić, Branimir; Schuster, Ralf
The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone // International journal of earth sciences (2020) (znanstveni, prihvaćen)


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Naslov
The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone

Autori
Slovenec, Damir ; Belak, Mirko ; Mišur, Ivan ; Šegvić, Branimir ; Schuster, Ralf

Vrsta, podvrsta
Radovi u časopisima, znanstveni

Izvornik
International journal of earth sciences (2020)

Status rada
Prihvaćen

Ključne riječi
cumulate gabbronorite, intra-oceanic island arc, Mt. Papuk, Tisza Mega-Unit, early Paleozoic, Gondwana suture zone

Sažetak
The Mt. Papuk heteroadcumulate pyroxene-amphibole gabbronorites, which outcrops at the southern margin of the Tisza Mega-Unit is suggested to stem from the deep oceanic crust formed by the in situ crystallization in a supposed magma chamber. Amphibole oikocrystals are found to define a poikilitic texture of analysed rocks. A common enclosure in amphibole is the cumulus orthopyroxene, and rarely, the clinopyroxene and/or plagioclase and spinel. The chemical composition of related minerals and their crystallization sequence suggest the sub-solidus crystallization of gabbronorite in an open system at high temperatures and medium pressures. Parental magmas originated from the moderately depleted mantle source, which was metasomatized prior to melting. Early mineral fractionation gave rise to the assemblage consisted of spinel, pyroxene, plagioclase and intecumulus amphibole. The rocks’ bulk chemistry, mineral crystallization sequence, pyroxene geochemistry and myriad of high-Ca plagioclase, which coexists with igneous Ca-amphibole are all in favour of the strong subduction influence typical for mafic intrusion formed above mantle wedge in the root of an island arc at depths of 10 to 21 km. Herein presented geochemical and isotopic data (40Ar-39Ar: 487.1 ± 4.3 Ma and Sm-Nd: 505 Ma) to go along with existence of an intra-oceanic arc related to geodynamic events that took place in the Prototethyan oceanic realm s.l. during middle Cambrian to earliest Ordovician. These events were likely correlated with the subduction of the Quaidam(?) back-arc ocean, or alternatively, with the subduction and closure of Prototethyan branches located between microcontinental fragments of Asia. Initially, the closure of back-arc oceans led to crust fragmentation and, then, addition of non-metamorphosed mafites into the obducted sequence further from the active continental margins of Gondwana and Laurassia at the time of the formation of Pangea in the late Palaeozoic.

Izvorni jezik
Engleski

Znanstvena područja
Geologija



POVEZANOST RADA


Projekti:
181-1811096-1093 - Osnovna geološka karta Republike Hrvatske 1:50.000 (Belak, Mirko, MZOS ) ( POIROT)
181-1951126-1141 - Mezozojske magmatske, plaštne i piroklastične stijene sjeverozapadne Hrvatske (Slovenec, Damir, MZOS ) ( POIROT)
HRZZ-IP-2019-04-3824 - Vulkano-sedimentne sukcesije sjeverozapadne Hrvatske i njihova uloga u razumijevanju geodinamike Paleotetisa tijekom srednjeg trijasa (GOST) (Slovenec, Damir, HRZZ - 2019-04) ( POIROT)

Ustanove:
Hrvatski geološki institut

Profili:

Avatar Url Branimir Šegvić (autor)

Avatar Url Damir Slovenec (autor)

Avatar Url Ivan Mišur (autor)

Avatar Url Mirko Belak (autor)


Citiraj ovu publikaciju

Slovenec, Damir; Belak, Mirko; Mišur, Ivan; Šegvić, Branimir; Schuster, Ralf
The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone // International journal of earth sciences (2020) (znanstveni, prihvaćen)
Slovenec, D., Belak, M., Mišur, I., Šegvić, B. & Schuster, R. (2020) The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone. Prihvaćen za objavljivanje u International journal of earth sciences. [Preprint].
@unknown{unknown, year = {2020}, keywords = {cumulate gabbronorite, intra-oceanic island arc, Mt. Papuk, Tisza Mega-Unit, early Paleozoic, Gondwana suture zone}, journal = {International journal of earth sciences}, title = {The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone}, keyword = {cumulate gabbronorite, intra-oceanic island arc, Mt. Papuk, Tisza Mega-Unit, early Paleozoic, Gondwana suture zone} }
@unknown{unknown, year = {2020}, keywords = {cumulate gabbronorite, intra-oceanic island arc, Mt. Papuk, Tisza Mega-Unit, early Paleozoic, Gondwana suture zone}, journal = {International journal of earth sciences}, title = {The early Paleozoic cumulate gabbroic rocks from the southwest part of the Tisza Mega-Unit (Mt. Papuk, NE Croatia) - evidence of a Gondwana suture zone}, keyword = {cumulate gabbronorite, intra-oceanic island arc, Mt. Papuk, Tisza Mega-Unit, early Paleozoic, Gondwana suture zone} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





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