The Balkan Thrust Wedge and Foreland Basin of Eastern Bulgaria: Structural and Stratigraphic Development
Published:January 01, 1997
H.D. Sinclair, S.G. Juranov, G. Georgiev, P. Byrne, N.P. Mountney, 1997. "The Balkan Thrust Wedge and Foreland Basin of Eastern Bulgaria: Structural and Stratigraphic Development", Regional and Petroleum Geology of the Black Sea and Surrounding Region, A. G. Robinson
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The Balkan Mountains of Bulgaria run east-west and outcrop along the north-south-running Black Sea coastline. Immediately north of the Balkan thrust front is the Kamchia Depression, which has been interpreted to repre-sent the North Balkan foreland basin. To the south is the Srednogorie Zone, comprising Cretaceous calc-alkaline volcanics representing a remnant vol-canic arc. A north-south structural cross section can be generated by the inte-gration of coastal exposures, with deeper level constraint from onshore and offshore seismic data. In this section, the Balkans comprise two large syn- clines bounded by major faults. This folding and thrusting detached at a horizon...
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Regional and Petroleum Geology of the Black Sea and Surrounding Region
In 1967 and 1969, two oceanographic cruises were made in the Black Sea under the guidance of the Woods Hole Oceanographic Institute: The cruises included scientists from many countries and disciplines. Their aims were to determine the recent geological and geochemical evolution of the Black Sea, to map the shallow structure of the basin, and to study the interaction between the oxidized surface waters and the anoxic waters beneath them. The results were published 23 years ago, as AAPG Memoir 20 (Ross and Degens, 1974). During the 1969 cruise, the vessel Atlantis II collected 40 piston cores, which formed the basis of most of the subsequent geological studies that were restricted to very recent sedimentation. Speculations concerning the origin of the basin and the relationship of the geology offshore to that exposed around the margins of the Black Sea were rooted in pre-plate tectonic concepts of basin formation and were in any case hampered by a lack of relevant data (Brinkmann, 1974).
In 1976, the Glomar Challenger visited the Black Sea on Leg 42B of the Deep Sea Drilling Project and drilled and cored three deep-water sites (379, 380, and 381). Well 381 north of the Bosporus encountered sediments as old as Miocene, including some apparently deposited in shallow water (Ross, 1978).
The next major volume in Western literature to deal with the Black Sea was published a decade later, collecting papers presented two years earlier at a conference in Yalta. In this volume, a number of seismic reflection lines