Torn Between Two Plates: Exhumation of the Cer Massif (Internal Dinarides) as a Far-Field Effect of Carpathian Slab Rollback Inferred From 40Ar/39Ar Dating and Cross Section Balancing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A90120%2F21%3AN0000214" target="_blank" >RIV/26722445:90120/21:N0000214 - isvavai.cz</a>

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021TC006699" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021TC006699</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2021TC006699" target="_blank" >10.1029/2021TC006699</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Torn Between Two Plates: Exhumation of the Cer Massif (Internal Dinarides) as a Far-Field Effect of Carpathian Slab Rollback Inferred From 40Ar/39Ar Dating and Cross Section Balancing

Popis výsledku v původním jazyce

Extension across the southern Pannonian Basin and the internal Dinarides is characterized by Oligo-Miocene metamorphic core complexes (MCCs) exhumed along mylonitic low-angle extensional shear zones. Cer MCC at the transition between Dinarides and Pannonian Basin occupies a structural position within the distal-most Adriatic thrust sheet and originates from two different tectonic processes: Late Cretaceous-Paleogene nappe-stacking during a continent-continent collision with Adria in a lower plate position, and exhumation related to Miocene extension driven by the Carpathian slab-rollback. Structural data and a balanced cross section across the Cer massif show linking of the exhuming shear zone to a breakaway fault, which reactivated the early Late Cretaceous most internal nappe contact. Paleozoic greenschist-to amphibolite-grade lithologies surround a polyphase intrusion composed of I- and S-type granites and were exhumed along a shear zone characterized by top-N transport. Thermobarometric analyses indicate an intrusion depth of 7-8 km of the Oligocene I-type granite; cooling below similar to 500 degrees C occurred at 25.4 +/- 0.6 Ma (1 sigma) yielded by Ar-40/Ar-39 dating of hornblende. Biotite and white mica from this intrusion as well as from the mylonitic shear zone yield Ar-40/Ar-39 cooling ages of 17-18 Ma independent of the used techniques (in situ laser ablation, single-grain total fusion, single-grain step heating, and multi-grain step heating). White mica from the S-type granite yield an Ar-40/Ar-39 cooling age of 16.7 +/- 0.1 Ma (1 sigma). Associated dikes intruding the shear zone were also affected by N-S extension resulting in the exhumation of the MCC, which was triggered by the opening of the Pannonian back-arc basin in response to the Carpathian slab-rollback.

Název v anglickém jazyce

Torn Between Two Plates: Exhumation of the Cer Massif (Internal Dinarides) as a Far-Field Effect of Carpathian Slab Rollback Inferred From 40Ar/39Ar Dating and Cross Section Balancing

Popis výsledku anglicky

Extension across the southern Pannonian Basin and the internal Dinarides is characterized by Oligo-Miocene metamorphic core complexes (MCCs) exhumed along mylonitic low-angle extensional shear zones. Cer MCC at the transition between Dinarides and Pannonian Basin occupies a structural position within the distal-most Adriatic thrust sheet and originates from two different tectonic processes: Late Cretaceous-Paleogene nappe-stacking during a continent-continent collision with Adria in a lower plate position, and exhumation related to Miocene extension driven by the Carpathian slab-rollback. Structural data and a balanced cross section across the Cer massif show linking of the exhuming shear zone to a breakaway fault, which reactivated the early Late Cretaceous most internal nappe contact. Paleozoic greenschist-to amphibolite-grade lithologies surround a polyphase intrusion composed of I- and S-type granites and were exhumed along a shear zone characterized by top-N transport. Thermobarometric analyses indicate an intrusion depth of 7-8 km of the Oligocene I-type granite; cooling below similar to 500 degrees C occurred at 25.4 +/- 0.6 Ma (1 sigma) yielded by Ar-40/Ar-39 dating of hornblende. Biotite and white mica from this intrusion as well as from the mylonitic shear zone yield Ar-40/Ar-39 cooling ages of 17-18 Ma independent of the used techniques (in situ laser ablation, single-grain total fusion, single-grain step heating, and multi-grain step heating). White mica from the S-type granite yield an Ar-40/Ar-39 cooling age of 16.7 +/- 0.1 Ma (1 sigma). Associated dikes intruding the shear zone were also affected by N-S extension resulting in the exhumation of the MCC, which was triggered by the opening of the Pannonian back-arc basin in response to the Carpathian slab-rollback.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

—

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Tectonics

ISSN

0278-7407

e-ISSN

1944-9194

Svazek periodika

40

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

29

Strana od-do

1-29

Kód UT WoS článku

000665973300013

EID výsledku v databázi Scopus

2-s2.0-85108556960