Grazina Skridlaite

• Doctor
• Senior Researcher at Nature Research Centre

The Varena Iron Ore deposit in the SW East European Craton is a significant ore body that occurs within metamorphosed and hydrothermally reworked Paleoproterozoic dolostones. We have performed microstructural investigations supplemented with mineral chemistry and geochronological investigations (LA-ICP-MS) to obtain age constraints on the ore-formi...

In 2020, rescue excavations due to construction of a pipeline connecting Poland and Lithuania took place at the Bronze Age sites Tarbiškės 1 and Tarbiškės 2, eastern Lithuania, both dated to 1050-900 cal BC. They revealed a rather homogeneous archaeological assemblage which fills a gap in the development of the Bronze Age culture and economy in the...

A geochemical and mineralogical approach was used to analyze 3rd millennium BCE pottery from Southeast Lithuania that is attributed to the foreign Corded Ware Culture and local hunter-gatherers. SEM-EDS, XRF, XRD, and FTIR were used to study the peculiarities of the pottery and to develop hypotheses about the raw material and technology choices pre...

A total of 4344 magmatic U-Pb ages in the range 2300 to 800 Ma have been compiled from the Great Proterozoic Accretionary Orogen along the margin of the Columbia / Nuna supercontinent and from the subsequent Grenvillian collisional orogens forming the core of Rodinia. The age data are derived from Laurentia (North America and Greenland, n = 1212),...

A total of 4344 magmatic U-Pb ages in the range 2300 to 800 Ma have been compiled from the Great Proterozoic Accretionary Orogen along the margin of the Columbia / Nuna supercontinent and from the subsequent Grenvillian collisional orogens forming the core of Rodinia. The age data are derived from Laurentia (North America and Greenland, n = 1212),...

A Mid-Lithuanian Domain (MLD) was distinguished by Bogdanova et al. (2015) as part of the large Mid-Baltic Belt (MBB) in the western East European Craton. Zircon U-Pb dating by SIMS, Sr- and Nd-isotope systematics and a detailed geochemical study have allowed to subdivide the MLD into two parts: NW and SE. The NW magmatic rocks have been emplaced a...

The crystalline crust of Lithuania is made of crustal fragments (terranes) that were subsequently amalgamated during the 1.90-1.75 Ga Svecofennian orogeny [1]. Lack of knowledge on metamorphic pressure-temperature (P-T) conditions for the high-grade events [2; 3] in the West Lithuanian granulite domain (WLG) prevents effective evolutionary reconstr...

In previous studies it was found that the antimicrobial properties of pulcherrimin-producing Metschnikowia species are related to the formation of a red pigment-pulcherrimin and sequestration of free iron from their growth medium. For strains of Metschnikowia pulcherrima, M. sinensis, M. shaxiensis, and M. fructicola, at a high, ≈80 mg/kg, elementa...

Simple and convenient innovative assays in vitro demonstrating Metschnikowia spp. competition with Saccharomyces cerevisiae for an essential nutrient iron are presented. The tested Metschnikowia strains possess a common genetically determined property of secreting a pulcherriminic acid which in the presence of iron (III) ions forms an insoluble red...

The large Varena Iron Ore deposit of southeast Lithuania lies beneath 200–400 m thick sedimentary cover in the East European Craton. Several drilling projects have revealed that it contains ca. 70–200 million tons of iron ore. A metasomatic origin has been proposed by several investigators, with an igneous (mafic, ultramafic carbonatitic) origin al...

In the western East European Craton (EEC), southern Lithuania, a suite of fine-grained, thinly bedded rocks of unusual composition has been shown to have originally comprised intermediate and felsic volcanic rocks. They extruded at ca. 1.83 Ga and were hydrothermally altered prior to metamorphism, which converted them into garnet-, gedrite-, anthop...

Concealed crystalline basement of the Latvia-East Lithuania (LEL) domain is covered by 200-500 m thick sediments. It is mostly composed of basic to acidic intrusive rocks and their volcanic counterparts that host ore deposits. Bogdanova et al (2015) suggested correlations between the 1.89-1.87 Ga Bergslagen microcontinent and Livonia megadomain (in...

A number of metamorphic events between 1.7- 1.6 Ga were recognized within the hidden basement of Lithuania Skridlaite et al., 2014) . In Baltica, , this period marks a tremendous change in tectonic evolution (cf Bogdanova et al., 2008, 2015), when an active accretionary margin shifted to its western edge (cf Bingen et al., 2008).

Motiejūnaitė, J. & Skridlaitė, G. 2017. New records of lichens and lichenicolous fungi in Lithuania, mainly from quarries. — Herzogia 30: 126–137. The lichen floras of dolomite, limestone, opoka, clay, sand and gravel quarries, as well the few existing natural dolomite outcrops suitable for lichens in various parts of Lithuania were studied. Also,...

Magnetites of the Varėna Iron Ore Deposit (VIOD) were thoroughly investigated by the Cameca SX-100 microprobe at the Warsaw University and by the Quanta 250 Energy Dispersive Spectroscopy (EDS) at the Nature Research Centre in Vilnius, Lithuania. Four generations of magnetite were distinguished in the studied serpentine-magnetite ores (D8 drilling)...

Sosnowsky’s hogweed (Heracleum sosnowskyi Manden.) mericarps were collected from satellite and stem branch umbels for comparative anatomical investigation. Located near Vilnius city, the habitat of Heracleum sosnowskyi, formerly a natural forest edge has recently been densely occupied by plants of this species. SEM micrographs of abaxial and adaxia...

___________________________________________________________________________ Precambrian crystalline basement in Lithuania and N Poland is covered with sediments and studied by means of drilling and geophysics. Hundreds of drillings and their cores provide sufficient material for a reconstruction of major boundaries, rock units and their evolution....

The Palaeoproterozoic Svecofennides in the Baltic Shield correlates well with their unexposed counterparts across the Southern Baltic Sea. Apart from the effects of some microcontinents and oroclines, they feature 100 to 300 km wide tectonic domains and belts younging SSW. Major disturbance was caused by the collision of Fennoscandia with Volgo-Sar...

The effects of 5 s–24 h exposure to CuO nanosuspension (nCuO) and CuSO 4 on mortality of Nitellopsis obtusa cells within 48 days were investigated. Based on LED 50 kinetics, a toxicological endpoint of lethal exposure duration that induces 50% cell mortality, it was shown that mortality response of 10-min treated cells (by 3.2 and 24–79.9 mg Cu/l,...

We present new geochronological evidence of latest Palaeoproterozoic–earliest Mesoproterozoic magmatism in the Telsiai Deformation Zone, NW Lithuania. Employing the laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) at the University of Tasmania, Australia, we demonstrate that a granodiorite, which had previously been considere...

The concealed crystalline crust in the SW East European Craton consists of several domains finally accreted at 1.8-1.70 Ga (Bogdanova et al., 2014). However, some geological structures in the Lithuanian basement are still poorly reconstructed because of insufficient isotopic and geochemical data. Such is the Lazdijai 13 (Lz13) volcano-sedimentary s...

In the southwestern part of the East European Craton (EEC), several events of Palaeoproterozoic volcanic arc magmatic activity were recognized in the concealed crystalline basement. In Lithuania, the TTG suites of 1.89 Ga and 1.86-1.84 Ga were later metamorphosed in amphibolite and granulite facies conditions. Remnants of a volcano-sedimentary sequ...

The Palaeoproterozoic lower crust, forming several belts and domains, is a major component of the crystalline basement within the large region to the southeast of the Baltic Sea in Belarus, Lithuania and Poland. Four stages of high grade metamorphism have been determined in the Western Lithuanian Granulite domain (WLG) and Belarus–Podlasie Granulit...

Successful IYPE activities and implementation of Geoheritage day in Lithuania increased public awareness in geology. A series of projects introducing geology to the general public and youth, supported by EU funds and local communities, were initiated. Researchers from the scientific and applied geology institutions of Lithuania participated in thes...

A southwestward younging of Palaeoproterozoic terranes in the crystalline basement in the western part of the East European Craton has been recently suggested by numerous isotopic datings (TIMS, SIMS zircon, EPMA monazite and 40Ar/39Ar). Along with geochemical and geophysical data this allows to decipher a multistage accretionary history. In the ea...

The structural and exploration drilling in the 1950-1980s provided a voluminous drill core material for the scientific investigation of the Precambrian rocks in the crystalline basement of Lithuania. Modern scientific approaches such as U-Pb, 40Ar/39Ar, Re-Os isotope, P-T conditions investigations, seismic profiling etc. were applied after Lithuani...

The East European Craton in western Fennoscandia was mostly formed by the accretion of distinct terranes at c. 1.8 Ga. TTG magmatic rocks in the age range 1.86-1.84 Ga are abundant in the crystalline crust of S, central and NW Lithuania. In the south, TTG rocks compose the large Randamonys massif. A Zm347 tonalite yielded an 1859±5Ma concordia age,...

The western part of the East European Craton (EEC) consists of several terrains finally accreted at c. 1.80 Ga [1]. The Lithuanian part experienced a complicated geological evolution with orogenic events at c. 1.85-1.80 Ga, 1.70-1.60 Ga and 1.53-1.50 Ga. Major magmatic events were dated by conventional and SIMS zircon geochronology, however it ceas...

The western East European Craton (EEC) was formed by the accretion of distinct terrains at c. 1.8 Ga. Some boundaries between particular terrains and their continuation across the Baltic Sea from Lithuania to Sweden have to be justified. Recently obtained numerous U-Pb zircon ages from the Siupariai 3 (Sp3), Palukne 1 (Pl1) charnockites, Rukai 1 (R...

A great number of Lithuanian secondary and high schools devoted a range of activities to Earth sciences on September 22 (autumn equinox), 2008 proclaimed by the Lithuanian National Committee for IYPE and Ministry of Education and Science of Lithuania as "Earth's day". Beforehand, the 11 IYPE brochures were translated, supplemented with relevant Lit...

Several Palaeoproterozoic terranes in the Fennoscandian lithospheric segment of the East European Craton (EEC) evolved differently prior to their final amalgamation at c. 1.8 Ga. South-westward younging of the major tectono-thermal events characterizes the Baltic -Belarus region between the Baltic and Ukrainian Shields of the EEC. While at c.1.89-1...

The Pre cam brian base ment of Lith u a nia and NE Po land, much of which is metasedimentary paragneiss, can be ac cessed only by cores from deep bore holes. Ion microprobe dat ing of de tri tal zir cons from sam ples of these meta sedi ments and the geo chem i cal sig na tures of the rocks pro vide new in sights into their age and prov e nance. De...

The presence of 1.52–1.50 Ga charnockites from the anorthosite–mangerite–charnockite–granite (AMCG) Mazury complex in southern Lithuania and NE Poland, in the western East European Craton (EEC) is revealed by secondary ion mass-spectrometry (SIMS) and EPMA geochronology. Early 1.85–1.82 Ga charnockites are related to major orogeny in the region whe...

Monazites are important accessory phases in supracrustal migmatitic granulites from drillcores in south-western Lithuania (Lauksargiai-2, Lauksargiai-5 and Bliüdžiai-150 boreholes). They retain information not only on the age of the main thermal events in the host rocks but indicate at the reactions and processes that release the components to buil...

Several Palaeoproterozoic terranes in the western part of the East European Craton (EEC) evolved differently prior to their final amalgamation at c. 1.8 Ga. South-westward younging of the major tectono-thermal events characterizes this part of the EEC. At c. 1.85-1.84 Ga, rocks of the northern and eastern terranes (Estonia, NW Belarus and eastern L...

Several subcropping anorthosite–mangerite–charnockite–granite (AMCG) plutonic suites are aligned along E–W trending lineaments in the Lithuanian part of the East European Craton. The Rukai quartz monzodiorite from the Nemunas suite yields a zircon U–Pb intrusion age of 1447 ± 5 Ma, and the Geluva granite an age of 1445 ± 8 Ma, both obtained using s...

The Palaeoproterozoic crust and upper mantle in the region between the Ukrainian and Baltic shields of the East European Craton were built up finally during collision of the previously independent Fennoscandian and Sarmatian crustal segments at c. 1.8–1.7 Ga. EUROBRIDGE seismic profiling and geophysical modelling across the southwestern part of the...

To assess the Precambrian evolution of the western East European Craton (EEC), seven new 40Ar/39Ar amphibole age determinations have been carried out for the rocks along the Mid Lithuanian Suture Zone (MLSZ) and adjacent East Lithuanian Domain. They confinn the strong reworking of the Palaeoproterozoic crust by 1.57-1.45 Ga events, most likely due...

The Palaeoproterozoic crust and upper mantle in the region between the Ukrainian and Baltic shields of the East European Craton were built up finally during collision of the previously independent Fennoscandian and Sarmatian crustal segments at c.

The East European Craton (EEC) consists of Archaean nucleii and accreted Proterozoic terranes. Pressure-Temperature-time (P-T-t) paths for the West Lithuanian Granulite Domain (WLG), the East Lithuanian Domain (ELD) and the Mid-Lithuanian Suture Zone (MLSZ) in the southwestern part of the EEC constrain the sequence of tectonic events and their defo...

The present study of monzodiorite, quartz monzodiorite, monzonite, quartz syenite, granodiorite, and rapakivi-like granite surrounding the Suwalki, Ketrzyn and Sejny anorthosite, norite and gabbro plutons or forming separate bodies in northern Poland and southern Lithuania, has resulted in the recognition of a specific suite with AMCG affinity. The...

The West Lithuanian Granulite Domain (WLG), Mid Lithuanian Suture Zone (MLSZ), East Lithuanian Domain (ELD) and Belarus-Podlasie Granulite Belt (BPG) in the west of the East European Craton (EEC) were evolved in different ways as implied from the metamorphic studies. In the westernmost WLG, sedimentary and igneous rocks were buried to ca 35 km by s...

Twenty-three new 40Ar/39Ar amphibole age determinations have been carried out to date major crustal boundaries in the sediment-covered crystalline basement of the western part of the East European Craton, in the area between the Baltic (Fennoscandian) and the Ukrainian Shields. That crystalline basement is characterised by a pronounced alternation...

The West Lithuanian Granulite (WLG) and East Lithuanian domains (ELD) form the Proterozoic basement of Lithuania and can be distinguished on the basis of differing structural patterns, lithologies, and evolutionary histories. They are juxtaposed along the Mid-Lithuanian Suture Zone (MLSZ).In the WLG, the main lithotectonic complexes comprise felsic...

The paper presents geological, petrogenetic, geochemical and geochronological features of several metavolcanic and metasedimentary rock complexes from Polish – Lithuanian cross-border, belonging to Masovian massif and mid-Lithuanian suture zone. On the basis of the regional geophysical images and geochemical characteristics of the studied rocks we...