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Publications (27)
Floods, debris flows, and landslides are hazardous processes that often occurred in mountainous terrains over the world and could be highly destructive. In the last few decades, these events occur more often global, causing disasters as a result of climate changes and poor hazard and risk mitigation measures in the countries. On a regional scale, t...
Metamorphosed mafic ophiolitic rocks in the metamorphic section of the eastern Rhodope Massif in Bulgaria and Greece are important for understanding the oceanic lithosphere fragments, which have been involved in Alpine tectonic-metamorphic processes. Petrography and mineral compositions of the meta-mafic rocks (mostly gabbro-basalt to minor diorite...
We report on the isotopic compositions of the Jurassic supra-subduction zone Evros ophiolite mafic rocks exposed in the eastern Circum-Rhodope Belt of northeastern Greece. These mafic units consist of low-Ti gabbroic and basaltic rocks, whose Nd–Sr–Pb isotopes are compatible with dominant mantle-derived MORB component mixed with a detectable amount...
In the Alpine orogen of the north Aegean region, the eastern Rhodope Zone consists of widespread high-grade metamorphic basement exposed in Bulgaria and Greece. In this high-grade basement, the lithologically variegated upper unit contains meta-ultramafic bodies, which are considered as dismembered Precambrian meta-ophiolite association (Kozhoukhar...
One of the biggest rivers in the southern part of the Balkan peninsula – the Mesta River is wellknown for frequent flash floods, especially in the upper river course. As a result of severe storms and related heavy rain in mid-July 2019, the Cherna Mesta River flooded, and this resulted in heavy damage to the road infrastructure and water-supply sys...
We report on the isotopic compositions of the Jurassic supra-subduction zone Evros ophiolite mafic rocks exposed in the eastern Circum-Rhodope Belt in the Thrace region of northeastern Greece. These mafic units consist of low-Ti gabbroic and basaltic rocks, which Nd-Sr-Pb isotopes are compatible with dominant mantle-derived Mid-Ocean Ridge Basalt (...
The torrential catchments located on the northern slopes of Belasitsa Mountain (SW Bulgaria), in the area of Petrich town were affected by an intense rainfall event in December 2021 that triggered a cascade of hazard processes like floods, landslides, debris flows/floods that caused major damage to the road network, properties, and buildings, showi...
Background The arc-related Evros ophiolite (Magganas, 1991, 2002) of Early-Middle Jurassic crystallization ages (e.g. Bonev et al., 2015) constitutes the essential part in the section of the eastern Circum-Rhodope Belt (eCRB), located in Thrace region of northeastern Greece (Fig.1a). In addition to the Triassic-Jurassic metasedimentary section of t...
Metamorphosed ultramafic bodies commonly occur within the high-grade metamorphic basement of the Rhodope Massif (RM), and they have been considered as fragments of dismembered Precambrian ophiolite association (Kozhoukharova, 1984). The crystallization age of the ultramafic bodies is unknown, for which the only temporal constraints come from U-Pb z...
The eastern part of the Rhodope Massif exposes mafic and large ultramafic metaophiolite bodies, whose origin and age are not clear enough to reconstruct past tectonic environments. The Variegated Complex in east Rhodopes hosts such associations characterized by а high-grade metamorphic overprint (Haydoutov et al., 2003), but the available protolith...
The Ribnishka River watershed, located on the southern slopes of Ograzhden Mountain is known for the repeated torrential events in the last few decades. In this paper, we represent a preliminary assessment of the debris floods and debris flows hazard in the Ribnishka River watershed. For this purpose, the topographic conditions in the watershed are...
At the place where Banderitsa and Demyanitsa rivers and their tributaries ceased to be confined to their narrow valleys one of the most impressive alluvial fans in South Bulgaria is formed – the one of Glazne river. The river valley morphology, as well as the evolution and the position of the Glazne fan, are controlled by the active normal faulting...
The analysis of the deposition zones is one of the main steps in the debris flows hazard assessments. For the area located north and northeast of Anton village is known that in the last 100 years there is at least one debris flow event. Field observations, geological characteristics, and raster analysis for prediction of possible sediment accumulat...
The analysis of the deposition zones is one of the main steps in the debris flows hazard assessments. For the area located north and northeast of Anton village is known that in the last 100 years there is at least one debris flow event. Field observations, geological characteristics, and raster analysis for prediction of possible sediment accumulat...
The southern slopes of Stara Planina Mountain are one of the well-defined areas in Bulgaria in terms of debris flows hazard. For the present study, we choose five watersheds located north and northwest of the village of Anton (Zlatitsa region) to make a preliminary hazard assessment for debris flows. Used methods include field observations, GIS and...
The investigations of the Upper Cretaceous Panagyurishte and Chelopech volcano-sedimentary strips of the Central Srednogorie tectonic subzone date back to the end of 19 th and became more intensive during the middle of the 20 th century, mainly due to the discovery of important mineral deposits in the area. Our field work during the last 15 years a...
The Botevgrad basin is one of the numerous Late Pliocene-Quaternary basins developed over the Balkanide orogen. The basin is developed in the West Balkan tectonic zone and on the northern slopes of the Stara Planina Mountain along the Plakalnitsa fault zone, the front of the orogen. The basin was interpreted as half-graben formed on the SW block of...
Along the southern slopes of the Stara Planina Mnt between
the villages Bunovo and Anton were described
series of brittle N-vergent fault zones (Dimitrov,
1936; Nikolaev, 1947; Kulaksazov, 19571; Milanov et
al., 19642; Kuykin et al., 1971; Antonov, Jelev, 2001,
2002). Z. Ivanov (unpublished data) defined “Bebresh-
Mirkovo dextral fault zone”. These...
Projects
Projects (3)
In this project through the investigation of Sr-Nd-Pb isotope systematics and U-Pb zircon dating of metaophiolites and ophiolites in the Serbo-Macedonian and Rhodope terranes, the team will identify distinct accreted arc/back-arc systems.
A contribution is expected on: (i) geochemical separation of the early rifting in the Mesozoic evolution of the Tethyan realm from the subsequent geochemical evolution related to development of the arc/back-arc basins at continental margin of Eurasia; (ii) tracing temporal and chemical evolution of Jurassic ophiolites from the arc/back-arc systems and establishing their temporal and chemical relation to the metaophiolites in the high-grade metamorphic basement in the Neotethys and/or Paleotethys oceanic basins context; (iii) establishing regional correlation across the Aegean region on the territories of Bulgaria and Greece of the accreted arc/back-arc systems as a consequence of Late Jurassic-Early Cretaceous convergence of type island arc-continental margin, which to result in (iv) tracing the path of continental growth of the Eurasian margin.
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Omar AlThuwaynee
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GIS and Geomatics Engineering
Research Institute for Geo-Hydrological Protection IRPI
Italian National Research Council, Perugia, Italy
R & D in Scientists Adoption Academy (scadacademy.com)
ORCID: 0000-00019863-2046
URL: https://www.irpi.cnr.it/scheda-personale/?ids=388
