Preliminary data on the K-Ar dating of the basic rocks from the region southerly of Momchilgrad, Eastern Rhodopes, Bulgaria

Pages: 
pp. 13-17
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Institute of Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Abstract: 

Volcanic rocks from the Eastern Rhodopes depression near to Bulgarian-Greek border are investigated. Six samples of basic altered rocks from 4 dykes and 2 larger bodies located into Kapinovo graben and Kushla volcano-tectonic structure are characterized. The K-Ar age of the basic dykes and small bodies is (31-32.5)±1.3 Ma and they are referred to the Early Oligocene (Rupelian). The time-span of the formation of the dykes corresponds as a whole to the time-span of the paroxismal volcanic events in the East Rhodope Volcanic Area.

П. Лилов, З. Печкай, А. Горанов, И. Боянов. Предварительные данные K-Ar датирования базичных пород южнее г. Момчилграда в Восточных Родопах, Болгария. Исследованы вулканиты Восточнородопского палеагенового понижения возле Болгаро-Греческой границы. Исследовано 6 проб измененных пород основного состава 4 даек и 2 более крупных тел, расположенных соответственно в Капиновском грабене и в Кушленской вулкано-тектонической структуре. K-Ar возраст исследованных пород  (31-32,5)±1,3 Ma относится к раннему олигоцену (рупел). Интервал возраста образования этих пород соответствует в целом диапазону возраста пароксизмальным вулканическим событиям в Восточнородопском вулканическом регионе.

Keywords: 

Eastern Rhodopes, basic rocks, K-Ar isotopic dating, Early Oligocene

VOLUME 30 (1-2)/June 2000

Institute of Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Bem ter 18/c, H-4001, Debrecen, Hungary
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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

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Institute of Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
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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

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

Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia
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Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia
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Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia

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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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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"Sofgeoprouchvane" Ltd.

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

Natinal Museum of Natural History, Bulgarian Academy of Sciences, 1, Tsar Osvoboditel blvd., 1000 Sofia, Bulgaria
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University of Thessaloniki, Laboratory of Geology and Palaentology, 54006 Thessaloniki, Greece

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