Structure and Alpine evolution of Bulgaria

Pages: 
pp. 9-15
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
Abstract: 

The territory of Bulgaria covers parts of two major tectonic units - the northern part of the Alpine thrust belt on the Balkans and its foreland - the Moesian platform.
   These two major tectonic units are generally recognized by all Bulgarian geologists but there has been and still is going on a considerable debate about their further subdivision into higher-ranking units, their structure and geodynamic interpretation.
   Earlier tectonic schemes were based on the geosynclinal theory. According to the classical and most popular concept of Бончев (1971, 1986), the northern branch of the Alpine orogen in Bulgaria developed within the geosynclinal "mobile space" between two cratons – the MIoesian platform and the Thracian "median massif'. From this viewpoint, the territory of Bulgaria was divided into three major tectonic units: Thracian massif (Serbo- Macedonian and Rhodope massifs), Alpine orogen and Moesian Platform. The orogen was further subdivided into "morpho structural zones": Balkanides (with Fore-Balkan and Stara Plan ina zones), Srednogorie, Kraishtides and South Carpathians. The tectonic map of Йовчев et aI. (1967, 1971) is based on a similar, slightly modified approach and portrays four major tectonic units: Rhodope massif, Moesian platform, AIpine fold belt (with seven zones) and Superimposed Tertiary depressions.
   Since the advent of the plate tectonic theory three decades ago, numerous controversial and contradicting tectonic models for the structure and geological evolution of Bulgaria have been proposed (Boyanov et aI., 1989; Dabovski et aI., 1989, Dokov et aI., 1989; Антова et aI., 1996 and many others). They are based on the concept that the Alpine evolution and structure of the Balkan Peninsula were controlled by continuous subduction and multiple collisions along the south facing continental margin of Eurasia. These models differ in the approach to define tectonic units, but share one common point of view - the Alpine thrust belt is a mosaic of proximal and exotic continental fragments that accreted to Eurasia during the closure of Tethys. So far, however, a published modern tectonic map of Bulgaria is not available.
   In order to arrive at the most objective tectonic model of any territory, it is necessary to compile and analyze as complete a range of geological parameters as possible, including lithology, palaeontology, stratigraphy, structure, volcanism, plutonism, metamorphism, radiometric data and geophysics. This approach has been adopted by the authors in an attempt to develop a new model for the Alpine structure and evolution of Bulgaria. The present paper is a summary of the main results.

VOLUME 32 (2-4)/December 2002 110th Anniversary of Acad. Prof. Strashimir Dimitrov; XVII Congress of the Carpathian-Balkan Geological Association

Geologica Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., bl. 24, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl. 24

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences,Sofia 1113, Bulgaria, Acad. G. Bonchev str, bl. 24
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Geological Institute, Bulgarian Academy of Sciences,Sofia 1113, Bulgaria, Acad. G. Bonchev str, bl. 24
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Earth Science Section of the Uviversity of Geneva, 13, rue des Maraîchers, 1211 Geneva 4, Switzerland
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Earth Science Section of the Uviversity of Geneva, 13, rue des Maraîchers, 1211 Geneva 4, Switzerland

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute BAS, Acad. G. Bonchev Str., Bl. 24 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Sofia University "Sv. Kliment Ohridski", 1504 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Sofia University "Sv. Kliment Ohridski", Tsar Osvobodilel Blvd, 15, 1000 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
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Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
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Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
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University of Mining and Geology "Sv. Ivan Rilski", 1700, Sofia

Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Institute of Geochemistry, Siberian branch of the Russian Academy of Sciences, P.O.B. 4019, 664033 Irkutsk
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
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Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
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Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
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Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
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Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
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Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113

Geological Institute, Bulgarian Academy of Sciences

Geological Institute, BAS, Acad. G. Bonchev Street Bl. 24, 1113 Sofia, Bulgaria

Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia
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Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia
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Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia

Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
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Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
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Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

University of Mining and Geology, Studentski grad, Sofia, 1100, Bulgaria
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Geological Institute of Romania, Caransebes Str. No 1, Bucharest, RO-78344, Romania
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University of Belgrade, Dusina 7, Belgrad, 11000, Yugoslavia
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Geological Institute of Romania, Caransebes Str. No 1, Bucharest, RO-78344, Romania

Geological Institute at Bulgarian Academy of Sciences, Sofia 1113

Sofia University "Sv. Kl. Ohridski", Department of Geology and Palaeontology, 1504 Sofia