Structural evolution of the eastern Balkans (Bulgaria)

Doglioni, Carlo; Busatta, C.; Bolis, Giorgio; Marianini, L.; Zanella, M.

doi:10.1016/0264-8172(95)00045-3

Cited by 50 publications

(29 citation statements)

References 7 publications

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“…In the eastern Mediterranean region, contemporaneously with the last indications of compression in the eastern Balkans in the Oligocene [Doglioni et al, 1996] and the early Miocene ~60° clockwise…”

Section: Continuing Southward Migration Of the Subduction Zonementioning

confidence: 92%

“…In this area, the latest Cretaceous-early Paleocene sedimentary and ophiolitic mélange was then folded and sheared toward the south, forming the Bornova flysch zone [Robertson et al, 2009;Okay et al, 2012]. Another consequence of this second collisional event was the development of a north-vergent fold-and-thrust-belt along the eastern Balkans and the Pontides since the middle-late Eocene (figures 9 and 10) [Doglioni et al, 1996;Yılmaz et al, 1997].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

2016

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Section: Continuing Southward Migration Of the Subduction Zonementioning

confidence: 92%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

2016

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“…[31] A number of studies describes late Eocene -middle Miocene inversional structures that have been observed in various other locations along the Western Black Sea margin [Doglioni et al, 1996;Moroşanu, 2002;Stovba et al, 2009]. However, the Romanian sector has not been so far integrated in a well-defined framework of thrusting geometries and, therefore, a correlation of basin inversion between the Pontides-Balkanides and the northern Odessa Shelf is required in order to understand the system kinematics.…”

Section: Inversion Of the Western Black Sea Back-arc Basinmentioning

confidence: 99%

“…Following its Cretaceous -early Eocene opening, large-scale compressional episodes are recorded all around its western basin starting with the late middle Eocene collision recorded between the Istanbul and Sakarya blocks [e.g., Görür, 1988;Robinson et al, 1996;Stephenson et al, 2004]. So far, a regional integration of the compressional thick-skinned structures observed on the Pontides margin [e.g., Okay et al, 2001;Sunal and Tüysüz, 2002], in the Balkanides thrusting [Doglioni et al, 1996], along the Odessa Shelf/Crimean margin [e.g., Stovba et al, 2009] and along the Romanian -northern Bulgarian offshore [Dinu et al, 2005;Tari et al, 2009] is lacking. The latter area displays a significant number of late Eocene -Oligocene structural highs [e.g., Moroşanu, 1996], whose unclear genesis has not been yet connected with the coeval inversion observed elsewhere.…”

Section: Introductionmentioning

confidence: 99%

“…This regional integration of inversional structures has Figure 1. Tectonic map of the Black Sea and adjacent areas (compiled from Finetti et al [1988], Doglioni et al [1996], Robinson and Kerusov [1997], Mikhailov et al [1999], Dinu et al [2005], Okay et al [2006], Saintot et al [2006], Afanasenkov et al [2007], Khriachtchevskaia et al [2009], and Nikishin et al [2010]). The inset is the location of Figure 8.…”

Section: Introductionmentioning

confidence: 99%

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Kinematics of back‐arc inversion of the Western Black Sea Basin

Munteanu

Maţenco²,

Dinu

et al. 2011

Tectonics

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[1] Back-arc basin evolution is driven by processes active at the main subduction zone typically assuming the transition from an extensional back-arc, during the retreat of a mature slab, to a contractional basin, during high-strain collisional processes. Such a transition is observed in the Black Sea, where the accurate quantification of shortening effects is hampered by the kinematically unclear geometries of Cenozoic inversion. By means of seismic profiles interpretation, quantified deformation features and associated syn-tectonic geometries on the Romanian offshore, this study demonstrates that uplifted areas, observed by exploration studies, form a coherent thick-skinned thrust system with N-ward vergence. Thrusting inverted an existing geometry made up by successive grabens that were inherited from the Cretaceous extensional evolution. The shortening started during late Eocene times and gradually affected all areas of the Western Black Sea Basin during Oligocene and Miocene times, deformation being coherently correlated across its western margin. The mechanism of this generalized inversion is the transmission of stresses during the collision recorded in the Pontides-Balkanides system. Syn-tectonic sedimentation in the Western Black Sea demonstrates that this process was continuous and took place through the onset of gradual shortening migrating northward. Although the total amount of shortening is roughly constant in an E-W direction, individual thrusts have variable offsets, deformation being transferred between structures located at distance across the strike of the system. The Black Sea example demonstrates that the vergence and offset of thrusts can change rapidly along the strike of such a compressional back-arc system. This generates apparently contrasting geometries that accommodate the same orogenic shortening.

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Tectonic, magmatic, and metallogenic evolution of the Late Cretaceous arc in the Carpathian‐Balkan orogen

et al. 2015

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The Apuseni-Banat-Timok-Srednogorie Late Cretaceous magmatic arc in the Carpathian-Balkan orogen formed on the European margin during closure of the Neotethys Ocean. It was subsequently deformed into a complex orocline by continental collisions. The Cu-Au mineralized arc consists of geologically distinct segments: the Apuseni, Banat, Timok, Panagyurishte, and Eastern Srednogorie segments. New U-Pb zircon ages and geochemical whole rock data for the Banat and Apuseni segments are combined with previously published data to reconstruct the original arc geometry and better constrain its tectonic evolution. Trace element and isotopic signatures of the arc magmas indicate a subduction-enriched source in all segments and variable contamination by continental crust. The magmatic arc was active for 25 Myr (~92-67 Ma). Across-arc age trends of progressively younger ages toward the inferred paleo-trench indicate gradual steepening of the subducting slab away from the upper plate European margin. This leads to asthenospheric corner flow in the overriding plate, which is recorded by decreasing Nd (0.51234 to 0.51264) ratios over time in some segments. The close spatial relationship between arc magmatism, large-scale shear zones, and related strike-slip sedimentary basins in the Timok and Pangyurishte segments indicates mild transtension in these central segments of the restored arc. In contrast, the Eastern Srednogorie segment underwent strong orthogonal intraarc extension. Segmental distribution of tectonic stress may account for the concentration of rich porphyry Cu deposits in the transtensional segments, where lower crustal magma storage and fractionation favored the evolution of volatile-rich magmas.

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Structural evolution of the eastern Balkans (Bulgaria)

Cited by 50 publications

References 7 publications

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Kinematics of back‐arc inversion of the Western Black Sea Basin

Tectonic, magmatic, and metallogenic evolution of the Late Cretaceous arc in the Carpathian‐Balkan orogen

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