New insights into the basement of the Transylvanian Depression (Romania)

Ionescu, Corina; Hoeck, Volker; Tomek, Čestmǐr; Koller, Friedrich; Balintoni, Ioan; Beşuţiu, L.

doi:10.1016/j.lithos.2008.06.004

Cited by 29 publications

(33 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the following subsections the available data on geological and geochemical characteristics of the East Vardar ophiolites in Romania [10,[29][30][31], Serbia [32][33][34][35][36], Macedonia [33][34][35][36][37] and Greece [33,[38][39][40], are summarized. The locations of the ophiolite massifs/outcrops addressed in this study are shown in Figure 1.…”

Section: East Vardar Ophiolitesmentioning

confidence: 99%

“…The presence of analogous ophiolitic rocks is indirectly revealed by deep wells in the Transylvanian Depression [30]. A few of the wells drilled the Middle/Upper Jurassic volcanic rocks ranging in composition from basalts to andesite are interpreted to represent counterparts of the calc-alkaline series that overlies the South Apuseni Mountains ophiolites.…”

Section: Geologymentioning

confidence: 99%

“…A few of the wells drilled the Middle/Upper Jurassic volcanic rocks ranging in composition from basalts to andesite are interpreted to represent counterparts of the calc-alkaline series that overlies the South Apuseni Mountains ophiolites. The presence of underlying ophiolites is only inferred by geophysical data [30].…”

Section: Geologymentioning

confidence: 99%

“…Transylvania - [30]; Ždraljica and Kuršumlija - [32][33][34]; Guevgeli - [37][38][39]; Circum Rhodope - [38,40]; Intrusives in the basement - [33]; West Vardar basic rocks - [17,34,67,68].…”

Section: Rock Geochemistrymentioning

confidence: 99%

“…However, there are also significant differences in the suggested geodynamic views. Ionescu et al [30] proposed westward subduction for the origin of South Apuseni and Transylvania ophiolites in order to explain the clear evidence that these ophiolites slices were obducted onto the European plate. For the southern East Vardar provinces, disagreements are related to the immediate setting in which spreading of the narrow oceanic realm occurred.…”

Section: Tectonostratigraphy and Agementioning

confidence: 99%

See 4 more Smart Citations

East Vardar Ophiolites Revisited: A Brief Synthesis of Geology and Geochemical Data

et al. 2018

View full text Add to dashboard Cite

The study reports and synthesizes the available geological and geochemical data on the East Vardar ophiolites comprising most known occurrences from the South Apuseni Mountains in Romania to the tip of the Chalkidiki Peninsula in Greece. The summarized geological data suggest that the East Vardar ophiolites are mostly composed of the magmatic sequences, whereas the mantle rocks are very subordinate. The members of the magmatic sequences are characterized by the presence of abundant acid and intermediate volcanic and intrusive rocks. The age of these ophiolites is paleontologically and radiometrically constrained and these data suggest that the East Vardar ophiolite formed as a short-lived oceanic realm that was emplaced before the uppermost Kimmeridgian. A relatively weak adakitic affinity is shown by intra-ophiolitic acid and intermediate rocks in many East Vardar provinces. It can be taken as evidence that the subduction of the young and hot slab, most likely along the earlier spreading ridge has occurred. A paleo-tectonic reconstruction consisting of four stages is proposed. It involves: a) an early/mid-Jurassic northnortheastward subduction of the West Vardar oceanic plate; b) the formation of a mid-Jurassic volcanic arc and a narrow back-arc oceanic stripe of East Vardar behind it; c) the mid-/Upper Jurassic initiation of East Vardar subduction along the ridge axis, and d) complex and heterogeneous emplacement of the East Vardar ophiolites. So far available data allow for having relatively clear ideas about the origin and evolution of the East Vardar ophiolites. However, in order to provide better understanding of all aspects of its evolution we need to answer additional questions related to the true structural position of the East Vardar ophiolites slices in Serbia, the exact nature of subduction that caused back-arc spreading (intraoceanic vs subduction under continent?) and the full significance of the adakitic signature shown by rocks in the East Vardar provinces other than Demir Kapija.

show abstract

Section: East Vardar Ophiolitesmentioning

confidence: 99%

Section: Geologymentioning

confidence: 99%

Section: Geologymentioning

confidence: 99%

Section: Rock Geochemistrymentioning

confidence: 99%

Section: Tectonostratigraphy and Agementioning

confidence: 99%

See 3 more Smart Citations

East Vardar Ophiolites Revisited: A Brief Synthesis of Geology and Geochemical Data

et al. 2018

View full text Add to dashboard Cite

show abstract

Evolution of the Sibişel Shear Zone (South Carpathians): A study of its type locality near Răşinari (Romania) and tectonic implications

et al. 2016

View full text Add to dashboard Cite

The Sibişel Shear Zone is a 1–3 km wide, ductile shear zone located in the South Carpathian Mountains, Romania. In the Rășinari area, the ductile shear zone juxtaposes amphibolite facies rocks of the Lotru Metamorphic Suite against greenschist facies rocks of the Râuşorul Cisnădioarei Formation. The first represents the eroded remnants of Peri‐Gondwanan arcs formed between the Neoproterozoic‐Silurian (650–430 Ma), regionally metamorphosed to amphibolite facies during the Variscan orogeny (350–320 Ma). The second is composed of metasedimentary and metavolcanic Neoproterozoic‐Ordovician (700–497 Ma) assemblages of mafic to intermediate bulk composition also resembling an island arc metamorphosed during the Ordovician (prior to ~ 463 Ma). Between these lie the epidote amphibolite facies mylonitic and ultramylonitic rocks of the Sibișel Formation, a tectonic mélange dominated by mafic actinolite schists attenuated into a high strain ductile shear zone. Mineral Rb‐Sr isochrons document the time of juxtaposition of the three domains during the Permian to Early Triassic (~290–240 Ma). Ductile shear sense indicators suggest a right lateral transpressive mechanism of juxtaposition; the Sibişel shear zone is a remnant Permo‐Triassic suture between two Early Paleozoic Gondwanan terranes. A zircon and apatite U‐Th/He age transect across the shear zone yields Alpine ages (54–90 Ma apatite and 98–122 Ma zircon); these data demonstrate that the exposed rocks were not subjected to Alpine ductile deformation. Our results have significant implications for the assembly of Gondwanan terranes and their docking to Baltica during Pangea's formation. Arc terranes free of Variscan metamorphism existed until the Early Triassic, emphasizing the complex tectonics of terrane amalgamation during the closure of Paleotethys.

show abstract

Tectonics and Exhumation of Romanian Carpathians: Inferences from Kinematic and Thermochronological Studies

Maţenco

2016

Springer Geography

View full text Add to dashboard Cite

The ultimate topographic expression of intra-continental mountain chains is established during continental collision. The Romanian Carpathians provide a key location for understanding the mechanics of collision during slab retreat because the nappe stacking was not overprinted by back-arc extension, as commonly observed elsewhere. A review of existing kinematic and low-temperature thermochronological data infers that the collisional mechanics is significantly different when compared with high-convergence orogens. The shortening of the orogen at exterior was entirely accommodated by back-arc extension and the area in between simply rotated and moved into the Carpathians embayment. The roll-back collision is driven by foreland-coupling, a process that gradually accretes and exhumes continental material towards the foreland. The topographic expression of the Romanian Carpathians is both inherited from latest Cretaceous-Paleogene times, such as in the Apuseni Mountains or South Carpathians, and overprinted by the Miocene exhumation associated with the roll-back collision, as in the East or the SE Carpathians. The migration of exhumation towards the foreland continued during Pliocene-Quaternary times and is still active modifying the present-day topography in the SE Carpathians. The Transylvanian Basin is one of the best examples available of vertical movements induced by deep mantle processes in what is commonly referred as dynamic topography.

show abstract

New insights into the basement of the Transylvanian Depression (Romania)

Cited by 29 publications

References 32 publications

East Vardar Ophiolites Revisited: A Brief Synthesis of Geology and Geochemical Data

East Vardar Ophiolites Revisited: A Brief Synthesis of Geology and Geochemical Data

Evolution of the Sibişel Shear Zone (South Carpathians): A study of its type locality near Răşinari (Romania) and tectonic implications

Tectonics and Exhumation of Romanian Carpathians: Inferences from Kinematic and Thermochronological Studies

Contact Info

Product

Resources

About