
Vlatko BrčićHrvatski geološki institut
Vlatko Brčić
PhD
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34
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Introduction
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March 2016 - September 2020
Publications
Publications (34)
The Hrvatsko Zagorje Basin, represents a part of the Slovenian Strait, an Oligocene-Middle Miocene seaway connection between Central Paratethys and Mediterranean. Volcanic deposits within basin are key geochronological markers for understanding the evolution of this important segment of the Paratethyan realm. The timing, eruption styles, magma char...
Explosive silicic volcanism of the Carpathian-Pannonian Region (CPR) is increasingly recognized as the primary source of tephra across the Alpine-Mediterranean region during the Early and Middle Miocene. However, the tephrostratigraphic framework for this period of volcanic activity is still incomplete. We present new multi-proxy data from Lower Mi...
Due to the wealth of climate-sensitive properties, speleothems have been propelled into prominence as one of the most powerful continental archives of past climate changes. However, the multitude of processes that operate in the unsaturated karst zone and in the cave atmosphere can make palaeoclimate interpretations of the speleothem proxies challe...
Reliable reconstructions of tephrostratigraphy and emplacement mechanisms of Early to Middle Miocene volcaniclastic deposits across the Alpine-Mediterranean region may yield important clues as to the nature, spread, volume, magnitude and frequency of large silicic eruptions of the Carpathian-Pannonian Region. Here we report on a sequence of Middle...
In the Early to Middle Miocene, the post‐orogenic intramontane lacustrine Sinj Basin that belonged to the Dinarides Lake System evolved in the area of the External Dinarides. A composite 770 m thick stratigraphic column was measured spanning the basin's stratigraphy. Eight facies were differentiated. Four facies are almost entirely composed of fres...
During the Neogene, repeated explosive eruptions of the Carpathian-Pannonian Region produced regionally spread volcaniclastic deposits. The volcanic record has become obscured due to erosion, tectonic activity, ongoing magmatism, and the deposition of younger sedimentary layers. To fully uncover the volcanic history of the source region, specifical...
The Alpine-Mediterranean region (AMR) hosted numerous volcanic centres during the Eocene to Quaternary, many of which recorded voluminous explosive activity (e.g., Rhodopes during the Oligocene, Sardinia during the Early Miocene, Anatolia during the Late Miocene–Pliocene, and Italian and Aegean arc during the Quaternary). Individual silicic eruptio...
Extensive and protracted volcanism in the Carpathian-Pannonian Region climaxed during the Early to Middle Miocene with series of major ignimbrite-forming eruptions with their products dispersed across the Alpine-Mediterranean Region. The spatial and temporal dispersion of these volcanic horizons make them potentially important stratigraphic markers...
Karst bauxite deposits in the North Dalmatian piggyback basin (NDPGB) are a part of the Mediterranean bauxite belt, which is the largest European bauxite deposit zone; however, there is a general lack of information regarding the genesis, age, and precursor of the bauxite deposits in this region. In this study, we combined detrital zircon U–Pb geoc...
A chloritoid schist from the Medvednica Mts. (Croatia, Zagorje-Mid-Transdanubian zone) is part of the metasedimentary succession of a Palaeozoic-Mesozoic Metamorphic Complex. The studied samples show the mineral association of chloritoid, chlorite, quartz and white mica. A P-T pseudosection, combined with modal and chemical isopleths, and classical...
The Carpathian-Pannonian Region (CPR) hosted some of the largest silicic volcanic eruptions in Europe during the Early and Middle Miocene, contemporaneously with major lithospheric thinning of the Pannonian Basin. This was recorded as an ignimbrite flare-up event from approximately 18.1–14.4 Ma. To gain in-depth perspectives on the eruption chronol...
On 29 December 2020, a shallow earthquake of magnitude Mw 6.4 struck northern Croatia, near the town of Petrinja, more than 24 hours after a strong foreshock (Ml 5). We formed a reconnaissance team of European geologists and engineers, from Croatia, Slovenia, France, Italy and Greece, rapidly deployed in the field to map the evidence of coseismic e...
The marine system of the Mediterranean-Paratethys region in the Middle Miocene was influenced by the global climatic changes corresponding to the Miocene Climate Optimum. The latter was characterized by global warming of deep oceanic waters succeeded by a decrease of wind activity and ocean water circulation together
with a decline in oceanic produ...
The Miocene Climatic Optimum (MCO) represents a global warm period (approximately 17–14.7 Ma) interrupting a long-term period of Cenozoic cooling. In order to elucidate if bauxitization took place in southeastern European mid-latitude areas during the MCO, we studied a section of undated massive karst bauxite (Crveni Klanac, CK) in central Dalmatia...
Geodetic benchmark displacement measurements following the 2020 Petrinjaearthquakein Croatia.
The most recent major earthquake series struck near Petrinja (December 29th 2020 M 6.2), and triggered extensive ground failures in the wider area of Petrinja, Sisak and Glina. Coseismic ground failures including subsidence dolines, liquefaction and landslides have been documented over a large area by various experts and teams. These data are store...
The 29 December 2020, Mw 6.4 Petrinja earthquake nucleated at a depth of~10 km in the Sisak-Moslavina County in northern Croatia,~6 km WSW of the Petrinja town. Focal mechanisms, aftershocks distribution, and preliminary Sentinel-1 InSAR interferogram suggest that the NW-SE right-lateral strike-slip Pokupsko-Petrinja fault was the source of this ev...
The Cenomanian–Turonian boundary (CTB) on the intra-Tethyan Adriatic Carbonate Platform (AdCP) is generally characterised by a transition between microbially laminated and/or bioclastic limestones to calcisphere-rich massive limestone with bioturbated intervals, organic-rich interbeds, firmgrounds, as well as neptunian dikes, carbonate turbidites,...
Mts. Kalnik and Požeška gora volcaniclastic sequences hold valuable information concerning the Miocene syn-rift evolution of the North Croatian Basin, and the evolution of the Carpathian-Pannonian Region and the Central Paratethys. We present volcanological, high-precision geochronological, and compositional data of volcanic glass to constrain thei...
The Lubuška pit is located in the area of the Strict Reserve “Hajdučki and Rožanski kukovi“ within the borders of the Northern Velebit National Park. Its entrance is situated at 1495 m above sea level. During previous speleological expeditions the pit has been explored to a depth of 508 m. No detailed geological surveys have been carried out so far...
Badenian (Middle Miocene) transgressive deepening-upward successions located in the NE part of Mt. Medvednica (North Croatian Basin, Pannonian Basin System) unconformably overlie Mesozoic basement. Triassic and Upper Cretaceous limestone pebbles, cobbles, and boulders of the Badenian basal conglomerates display abundant in situ bivalve borings of G...
The Cenomanian–Turonian boundary (CTB) in the Ćićarija Mountain region (northern Istria, Croatia) is characterized by calcisphere limestone successions with a firmground and glauconite horizon, bioturbated intervals, tempestites, and slumped structures as well as microbially laminated and organic-rich interbeds deposited in the northwestern part of...
The aim of the GEOSEKVA project is to improve the interpretation of the earthquake mechanisms in the investigated area, using 3D geological modelling based on modern lithostratigraphic maps and geological cross-sections, available borehole data, and interpreted seismic data. Furthermore, the neotectonic movements will be detected by analyses of an...
Rocky shorelines in the geological record, which represent major transgressive surfaces and provide us with crucial information about palaeoshorelines and ancient sea-levels, often involve a basal conglomerate associated with an unconformity. The unconformity between the Mesozoic basement and the overlying Middle Miocene (Badenian) deposits (which...
Geological investigations were carried out in the Sinawin-Sha'wa area, in northwestern Libya, in order to find suitable rocks for aggregate in asphalt mixtures for Nalut - Ghadamis Road reconstruction. By combined field work and micropetrographical analysis four different carbonate lithofacies were determined within Upper Cretaceous sedimentary seq...
Keywords: Sv. Duh Formation, Microfacies, Glauconite, OAE2, Cenomanian–Turonian, Ćićarija Mtn., Adriatic Carbonate Platform.
Within the ophiolitic mélange of the Central Dinaridic Ophiolitic Belt (CDOB) that stretches throughout the Balkans region in SE Europe, a latest Bajocian-early Bathonian radiolarian assemblage was obtained from chert-rich shaly to silty matrix. The sampling locality in northern Bosnia and Herzegovina is characterized by a highly-diversified ophiol...
“White horizon” archaeological units consisting of carbonate concretions occur in the archaeological settlement of “Orovački vinogradi”, located near Bjelovar (NW Croatia). During archaeological excavation these horizons were considered to be the inhabitation-levels within the historical layering profile. Further sedimentological and mineralogical...