Founded 1934 by Prof. Dr Stefan Bončev
A Geo-Sciences Journal of the Geological Institute “Strashimir Dimitrov”, Bulgarian Academy of Sciences
Official Journal of the Carpathian-Balkan Geological Association

Tracing impact events in clay samples with iridium anomaly at and above the Cretaceous/Paleogene boundary at Byala, Eastern Bulgaria

Pages: 
pp. 3-16
Ruslan Kostov
University of Mining and Geology “St Ivan Rilski”, Boyan Kamenov Str., 1700 Sofia, Bulgaria
Hristo Protohristov
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tsarigradsko Shose Blvd, 1784 Sofia, Bulgaria
Savka Marinova
Faculty of Physics and Technology, Plovdiv University “Paisiy Hilendarski”, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
Gergana Hristozova
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Latchesar Kostov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Ivanka Tringovska
Maritsa Vegetable Crops Research Institute, 32 Brezovsko Shose Blvd, 4003 Plovdiv, Bulgaria
Inga Zinicovscaia
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Konstantin Vergel
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Dmitrii Grozdov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Sergey S. Pavlov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Lyudmila P. Strelkova
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
Abstract: 

Elemental composition of two groups of 12 clay samples, at and above the Cretaceous/Paleogene (K/Pg) boundary at Byala (Black Sea shore, Eastern Bulgaria), is studied by Neutron Activation Analysis (NAA) in order to trace impact events. Iridium anomaly and a certain set of trace elements, together with biostratigraphic data, point to two possible impact events recorded: the first one (at the K/Pg boundary), linked to the giant Chicxulub impact in Mexico; and a second one (above the K/Pg boundary), possibly linked to the later in age, smaller and closer in distance, Boltysh impact in Ukraine.

Keywords: 

K/Pg boundary, impact events, geochemistry, Ir anomaly, Byala, Eastern Bulgaria

DOI: 
10.52321/GeolBalc.51.3.3
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VOLUME 51 (3)/December 2022

DETAILS

Ruslan Kostov
University of Mining and Geology “St Ivan Rilski”, Boyan Kamenov Str., 1700 Sofia, Bulgaria
|
Hristo Protohristov
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tsarigradsko Shose Blvd, 1784 Sofia, Bulgaria
|
Savka Marinova
Faculty of Physics and Technology, Plovdiv University “Paisiy Hilendarski”, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
|
Gergana Hristozova
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Latchesar Kostov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Ivanka Tringovska
Maritsa Vegetable Crops Research Institute, 32 Brezovsko Shose Blvd, 4003 Plovdiv, Bulgaria
|
Inga Zinicovscaia
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Konstantin Vergel
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Dmitrii Grozdov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Sergey S. Pavlov
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia
|
Lyudmila P. Strelkova
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 1419890 Dubna, Russia

Tracing impact events in clay samples with iridium anomaly at and above the Cretaceous/Paleogene boundary at Byala, Eastern Bulgaria

Zlatozar Boev
National Museum of Natural History, Bulgarian Academy of Sciences, 1000 Sofia, Bulgaria

Studia breviora: Additional material of Buteo spassovi Boev & Kovachev, 1998 from the Upper Miocene locality Hadzhidimovo (Blagoevgrad region, SW Bulgaria)

Plamen Ivanov
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Nikolai Dobrev
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Boyko Berov
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Antoaneta Frantzova
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Miroslav Krastanov
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Rosen Nankin
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Landslide risk for the territory of Bulgaria by administrative districts

Gergana Meracheva
Faculty of Geology and Exploration, University of Mining and Geology, 1700 Sofia, Bulgaria
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Efrosima Zaneva-Dobranova
Faculty of Geology and Exploration, University of Mining and Geology, 1700 Sofia, Bulgaria
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Nikolay Hristov
Faculty of Geology and Exploration, University of Mining and Geology, 1700 Sofia, Bulgaria

Seismic characterization analyses of the Bulgarian Black Sea shelf for assessment of reservoir properties

Irena Peytcheva
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Rositsa Ivanova
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Report on the XXII International Congress of the Carpathian Balkan Geological Association (CBGA) in Plovdiv, Bulgaria, September 7–11, 2022

Boriana Tchakalova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Plamen Ivanov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Correlation between effective cohesion and plasticity index of clay

András Galácz
Department of Palaeontology, Eötvös L. University, Pázmány Péter sétány 1/c, 1117 Budapest, Hungary

Occurrence of the peculiar ammonites Phlycticeras and Oecoptychius in the Callovian (Middle Jurassic) of the Villány Hills (South Hungary)

Momchil Dyulgerov
Department of Mineralogy, Petrology and Economic Geology, Faculty of Geology and Geography, Sofia University “St Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria
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Tanya Stoylkova
Department of Mineralogy, Petrology and Economic Geology, Faculty of Geology and Geography, Sofia University “St Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria

Mineralogical and geochemical characteristics of the Sedemte Prestola potassic alkaline pluton

Ilonka Koleva
Department of University Archive, Sofia University “St Kliment Ohridski, 15 Tsar Osvoboditel Blvd, 1000 Sofia, Bulgaria

The archive of Professor Georgi Zlatarski – knowledge source of the foundation of geology and paleontology in Bulgaria

Angel Kunov

In memoriam: Professor Milko Manolov Kanazirski, DSc (May 28, 1936 – August 04, 2022)

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