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Palaeogene alluvial–volcaniclastic deposits in the Mesta Basin (SW Bulgaria): depositional setting and basin evolution

Published online by Cambridge University Press:  27 October 2009

ANDREAS SIEMES*
Affiliation:
Steinmann Institut, Universität Bonn, Nußallee 8, 53115 Bonn, Germany
TOM McCANN
Affiliation:
Steinmann Institut, Universität Bonn, Nußallee 8, 53115 Bonn, Germany
ANNE FISCHER
Affiliation:
Steinmann Institut, Universität Bonn, Nußallee 8, 53115 Bonn, Germany
*
*Author for correspondence: andreas.siemes@gmail.com

Abstract

The Mesta half-graben is one in a series of extensional basins in SW Bulgaria that record the onset of extension within the Rhodope Zone in the Late Eocene. Tectonic activity on a continuous detachment along the eastern margin was a major control on subsidence, accommodation space creation, sediment supply and facies distribution in the basin. The sedimentary architecture was complicated by synsedimentary rotation, the presence of intrabasinal faults and the resulting compartmentalization, as well as synsedimentary volcanic activity. Facies and structural analysis of a key transverse section in the central part of the basin, together with supporting observations from other parts of the basin, indicate a pulsed tectono-sedimentary evolution of the basin with three distinct stages. The first stage (Late Eocene) is a phase of rapid extension with an initial alluvial setting. Basin margin fans and an axial fluvial through-drainage system were the major depositional systems in this stage. The second stage (Early Oligocene) marks the onset of volcanic activity within the Mesta Basin and is characterized by the formation of volcanic centres, an intense phase of explosive volcanism and rapid infilling of the previous basin topography with volcanic material deposited from pyroclastic density currents. The third stage (Late Oligocene) represents waning volcanic activity in a mixed alluvial–volcaniclastic environment. This stage is characterized by alternating alluvial and volcaniclastic depositional cycles, as well as partial reworking of volcanic material.

Type
Original Article
Copyright
Copyright © Cambridge University Press 2009

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References

Blair, T. C. & McPherson, J. G. 1992. The Trollheim alluvial fan and facies model revisited. Geological Society of America Bulletin 104, 762–9.2.3.CO;2>CrossRefGoogle Scholar
Blair, T. C. & McPherson, J. G. 1994. Alluvial fans and their natural distinction from rivers based on morphology, hydraulic processes, sedimentary processes, and facies assemblages. Journal of Sedimentary Research 64 (3), 450–89.Google Scholar
Bonev, N., Burg, J. P. & Ivanov, Z. 2006. Mesozoic–Tertiary structural evolution of an extensional gneiss dome – the Kesebir–Kardamos dome, eastern Rhodope (Bulgaria–Greece). International Journal of Earth Sciences 95 (2), 318–40.CrossRefGoogle Scholar
Burchfiel, B. C., King, R. W., Nakov, R., Tzankov, T., Dumurdzanov, N., Serafimovski, T., Todosov, A. & Nurce, B. 2008. Patterns of Cenozoic Extensional Tectonism in the South Balkan Extensional System. In Earthquake Monitoring and Seismic Hazard Mitigation in Balkan Countries (ed. Husebye, E. S.), pp. 318. Springer Science + Business Media B.V.CrossRefGoogle Scholar
Burchfiel, B. C., Nakov, R. & Tzankov, T. 2003. Evidence from the Mesta halfgraben, SW Bulgaria, for the Late Eocene beginning of Aegean extension in the Central Balkan Peninsula. Tectonophysics 375, 6176.CrossRefGoogle Scholar
Burchfiel, B. C., Nakov, R., Tzankov, T. & Royden, L. H. 2000. Cenozoic extension in Bulgaria and northern Greece: the northern part of the Aegean extensional regime. In Tectonics and Magmatism in Turkey and the Surrounding Area (eds Bozkurt, E., Winchester, J. A. & Piper, J. D. A.), pp. 325–52. Geological Society of London, Special Publication no. 173.Google Scholar
Burgisser, A. & Bergantz, G. W. 2002. Reconciling pyroclastic flow and surge: the multiphase physics of pyroclastic density currents. Earth and Planetary Science Letters 202, 405–18.Google Scholar
Cas, R. A. F. & Wright, J. V. 1987. Volcanic Successions, Modern and Ancient. London: Allen & Unwin Ltd, 528 pp.Google Scholar
Choux, C., Druitt, T. & Thomas, N. 2004. Stratification and particle segregation in flowing polydisperse suspensions, with applications to the transport and sedimentation of pyroclastic density currents. Journal of Volcanology and Geothermal Research 138, 223–41.CrossRefGoogle Scholar
Collinson, J., Mountney, N. & Thompson, D. 2006. Depositional structures in gravels, conglomerates and breccias. In Sedimentary Structures (eds Collinson, J., Mountney, N. & Thompson, D.), pp. 138–62. Terra Publishing.Google Scholar
Coussot, P. & Meunier, M. 1996. Recognition, classification and mechanical description of debris flows. Earth-Science Reviews 40, 209–27.CrossRefGoogle Scholar
Dhont, D., Yanev, Y., Bardintzeff, J. M. & Chorowicz, J. 2008. Evolution and relationships between volcanism and tectonics in the central-eastern part of the Oligocene Borovitsa caldera (Eastern Rhodopes, Bulgaria). Journal of Volcanology and Geothermal Research 171, 269–86.CrossRefGoogle Scholar
Dinter, D. A. 1998. Late Cenozoic extension of the Alpine collisional orogen, northeastern Greece: Origin of the north Aegean basin. Geological Society of America Bulletin 110 (9), 1208–26.Google Scholar
Felix, M. & Peakall, J. 2006. Transformation of debris flows into turbidity currents: mechanisms inferred from laboratory experiments. Sedimentology 53, 107–23.CrossRefGoogle Scholar
Fisher, R. V. & Schmincke, H. U. 1984. Pyroclastic Rocks. Berlin: Springer Verlag, 472 pp.Google Scholar
Gawthorpe, R. L. & Leeder, M. R. 2000. Tectono-sedimentary evolution of active extensional basins. Basin Research 12, 195218.Google Scholar
Harkovska, A. 1983. Spatial and temporal relations between volcanic activity and sedimentation in the stratified Paleogene from the central parts of Mesta Graben (SW Bulgaria). Geologica Balcanica 13, 330.Google Scholar
Harkovska, A., Marchev, P., Machev, P. & Pecskay, Z. 1998. Paleogene magmatism in the Central Rhodope area, Bulgaria – A review and new data. Acta Vulcanologica 10 (2), 199216.Google Scholar
Ivanov, R. & Chernyavska, S. 1972. Geological, petrographical and palynological data on the age of the Paleogene volcanic activity in Western Bulgaria: 3. The Paleogene of Mesta (in Bulgarian with English summary). Bulletin of the Geological Institute, Series Stratigraphy and Lithology XXI, 85100.Google Scholar
Ivanova, R. 2005. Volcanology and petrology of acid volcanic rocks from the Paleogene Sheinovets caldera, Eastern Rhodopes. Geochemistry, Mineralogy and Petrology 42, 2345.Google Scholar
Jenkins, S. F., Magill, C. R. & McAneney, K. J. 2007. Multi-stage volcanic events: A statistical investigation. Journal of Volcanology and Geothermal Research 161, 275–88.Google Scholar
Leeder, M. R. & Gawthorpe, R. L. 1987. Sedimentary models for extensional tiltblock/half-graben basins. In Continental Extensional Tectonics (eds Coward, M. P., Dewey, J. F. & Hancock, P. L.), pp. 139–52. Geological Society of London, Special Publication no. 28.Google Scholar
Lube, G., Cronin, S. J., Platz, T., Freundt, A., Procter, J. N., Henderson, C. & Sheridan, M. F. 2006. Flow and deposition of pyroclastic granular flows: A type example from the 1975 Ngauruhoe eruption, New Zealand. Journal of Volcanology and Geothermal Research 161, 165–86.Google Scholar
Malet, J. P., Laigle, D., Remaitre, A. & Maquaire, O. 2005. Triggering conditions and mobility of debris flows associated to complex earthflows. Geomorphology 66, 215–35.Google Scholar
Mason, B. G., Pyle, D. M. & Oppenheimer, C. 2004. The size and frequency of the largest explosive eruptions on Earth. Bulletin of Volcanology 66, 735–48.Google Scholar
McPhie, J., Doyle, M. & Allen, R. L. 1993. Volcanic textures: a guide to the interpretation of texture in volcanic rocks. CODES SRC, University of Tasmania, 198 pp.Google Scholar
Mulder, T. & Alexander, J. 2001. The physical character of subaqueous sedimentary density flows and their deposits. Sedimentology 48, 269–99.Google Scholar
Nemec, W. & Steel, R. J. 1984. Alluvial and coastal conglomerates: their significant features and some comments on gravelly mass-flow deposits. In Sedimentology of Gravels and Conglomerates (eds Koster, E. H. & Steel, R. J.), pp. 131. Canadian Society of Petroleum Geologists, Memoir no. 10.Google Scholar
Pecskay, Z., Harkovska, A. & Hadjiev, A. 2000. K–Ar dating of the Mesta volcanics (SW Bulgaria). Geologica Balcanica 30 (1–2), 311.Google Scholar
Ricou, L. E., Burg, J. P., Godfriaux, I. & Ivanov, Z. 1998. Rhodope and Vardar: the metamorphic and the olistromic paired belts related to Cretaceous subduction under Europe. Geodinamica Acta 11 (6), 285309.Google Scholar
Ricou, L. E., Burg, J. P., Godfriaux, I. & Ivanov, Z. 2000. Reply to Ivan Zagorchev's comment ‘Rhodope facts and Tethys self-delusions’. Geodinamica Acta 13 (1), 61–3.Google Scholar
Roche, O., Gilbertson, M. A., Phillips, J. C. & Sparks, R. S. J. 2005. Inviscid behaviour of fines-rich pyroclastic flows inferred from experiments on gas-particle mixtures. Earth and Planetary Science Letters 240, 401–14.Google Scholar
Salvador, A. 1994. International Stratigraphic Guide: A Guide to Stratigraphic Classification, Terminology, and Procedure, 2nd ed. International Union of Geological Sciences and Geological Society of America, 214 pp.Google Scholar
Schlische, R. W. 1991. Half-graben basin filling models: new constraints on continental extensional basin development. Basin Research 3, 123–41.Google Scholar
Sparks, R. S. J., Bursik, M. I., Carey, S. N., Gilbert, J. S., Glaze, L. S., Sigurdsson, H. & Woods, A. W. 1997. Volcanic plumes. John Wiley & Sons Ltd, 574 pp.Google Scholar
Tueckmantel, C., Schmidt, S., Neisen, M., Georgiev, N., Nagel, T. J. & Froitzheim, N. 2008. The Rila-Pastra Normal Fault and multi-stage extensional unroofing in the Rila Mountains (SW Bulgaria). Swiss Journal of Geosciences 101, 295310.Google Scholar
Viseras, C., Calvache, M. L., Soria, J. M. & Fernandez, J. 2003. Differential features of alluvial fans controlled by tectonic or eustatic accommodation space. Examples from the Betic Cordillera, Spain. Geomorphology 50, 181202.Google Scholar
Waltham, D. 2004. Flow transformations in particulate gravity currents. Journal of Sedimentary Research 74, 129–34.CrossRefGoogle Scholar
Westaway, R. 2006. Late Cenozoic extension in SW Bulgaria: a synthesis. In Tectonic development of the Eastern Mediterranean Region (eds Robertson, A. H. F. & Mountrakis, D.), pp. 557–90. Geological Society of London, Special Publication no. 260.Google Scholar
Zagorchev, T. 1998. Pre-Priabonian Paleogene formations in southwestern Bulgaria and northern Greece: stratigraphy and tectonic implications. Geological Magazine 135, 101–19.Google Scholar
Zagorchev, T. 2000. Comment: Rhodope facts and Tethys self-delusions. Geodinamica Acta 13 (4), 55–9.Google Scholar