Pregled bibliografske jedinice broj: 1205375
Mesozoic subduction-related metamorphic record from amphibolites of Sava zone: Moslavačka Gora (Croatia)
Mesozoic subduction-related metamorphic record from amphibolites of Sava zone: Moslavačka Gora (Croatia) // Goldschmidt2022
Honolulu (HI), Sjedinjene Američke Države; online, 2022. 10484, 1 (poster, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 1205375 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Mesozoic subduction-related metamorphic record from
amphibolites of Sava zone: Moslavačka Gora (Croatia)
Autori
Petrinec, Zorica ; Balen, Dražen ; Ladišić, Andreja ; Olić, Iva
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Skup
Goldschmidt2022
Mjesto i datum
Honolulu (HI), Sjedinjene Američke Države; online, 10.07.2022. - 15.07.2022
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
amphibolite ; subduction ; thermobarometry
Sažetak
Metamafic rock occurrences are rare in the generally felsic crystalline surface outcrops from the SW parts of the Pannonian Basin as in the case of Mt. Moslavačka Gora (MG), Croatia. General petrology of the MG encompasses Cretaceous S-type granitoid pluton (~82 Ma) that intruded the Ordovician (~480-490 Ma) granitoids [1] now present as fragmented belts at W and SE margins of the Cretaceous pluton. Metapelites recorded LP-HT granulite facies anatexis [2] between 90 and 100 Ma [1] and metamafic occurrences gave amphibolite cooling age of 80-90 Ma [3, 4], and both are predominantly found as xenoliths entrained by the Cretaceous granite in the marginal or central parts of the pluton. Our study focused on rare MG amphibolite xenoliths (m- to hundred m-sized) in order to establish their relation to other lithologies and their significance in the interpretation of the Mesozoic geodynamic evolution of the Sava zone i.e. suture zone that existed between Laurasia and peri- Gondwanan tectonic units (Adria). Immobile trace element geochemistry of amphibolites points to the N-MORB protolith related to the Neotethyan realm. Stromatic appearance of amphibolites and grain- scale observations point to a general anatectic reaction Hbl+Pl+Qtz±Ilm=Di±Ttn±Grt±Opx+melt taking place in the upper amphibolite to granulite facies conditions. Thermodynamic modelling confirmed a clockwise P-T path for the formation of amphibolites and the development of pressure assemblage Amph+PI+Ilm+Qtz in range 630-700°C and 800-950 MPa while the metapelites recorded conditions in range 720-790°C and 200-500 MPa [2]. Field evidence and known age data suggest that the anatexis in metamafic and metapelitic rocks took place at mid-crustal levels before the fragmentation and entrainment of blocks by the intruding S-type felsic magma. This data contrast previous interpretations that migmatisation of MG metamorphic lithologies was caused by the intrusion of the Cretacous S-type pluton and links the evolution of metapelites and metamafic rocks to an earlier subduction-related regional metamorphic event. [1] Starijaš et al. (2010) Swiss J Geosci, 103, 61–82. [2] Petrinec and Balen (2014) EGU2014-6186. [3] Lanphere and Pamić (1992) Acta Geologica, 22, 97–111. [4] Balen et al. (2001) PANCARDI 2001 Abstracts II, DP-2.
Izvorni jezik
Engleski
Znanstvena područja
Geologija
Napomena
Dio istraživanja financijski potpomognut
sredstvima Zaklade HAZU kroz projekt "Mehanizmi
nastanka, smještavanja i evolucije ksenolita
prilikom intruzije granita u stijene metamorfne
podloge Panonskog bazena (Moslavačka gora,
Hrvatska)" (Voditeljica ZP, natječaj 2018.)
POVEZANOST RADA
Projekti:
HRZZ-IP-2014-09-9541 - Kredni geodinamski dokazi u području Dinarida i Panonskog bazena (GEOPROOFS) (Balen, Dražen, HRZZ - 2014-09) ( CroRIS)
LiPS-Grad Čazma-JN10-NČ - Čazma Natura – idejno rješenje table sa osnovnim geološkim informacijama o geološkom lokalitetu Pleterac na Moslavačkoj gori (Petrinec, Zorica, LiPS ) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb