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Evolution of Neoarchean-Paleoproterozoic basement in the Brunovistulia terrane, S Poland : geological, P-T and geochemical records

Żelaźniewicz Andrzej Ryszard, Jastrzębski Mirosław

Geological Quarterly

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2021

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Vol. 65, No. 2

art. no. 20

EN

Brunovistulia is a composite terrane of Gondwana descent that eventually was accreted to the SW margin of Baltica, central Europe. It is built of metagneous and metasedimentary rocks that originated mainly between 650 and 550 Ma. However in the Upper Silesian part of Brunovistulia, much older fragments have been drilled, which yielded U-Pb zircon ages between 2.75 and 2.0 Ga. They have been interpreted as an “exotic” constituent of the Brunovistulia superterrane, named the Rzeszotary Terrane. Our geological and geochemical studies of the Rzeszotary borehole cores yielded new data on the composition, provenance and evolution of that terrane. Precursors of the Rzeszotary complex were separated from the depleted mantle prior to or around 3.2-3.0 Ga. At 2.75-2.6 Ga, a juvenile magmatic arc edifice formed, beneath which oceanic lithosphere was subducted. Decompression melting of the mantle brought about tholeiite magmas of IAT/MORB composition with LILE additions. Tonalitic and trondhjemitic precursors of gneisses present today were formed at that time, probably due to partial melting of mantle-derived wet basalts at the base of the island arc. Around 2.0 Ga, the arc collided with an unspecified cratonic mass and was subject to orogenic deformation, metamorphism and migmatization. The entire arc edifice was then strongly shortened and forced down to depths equivalent to ~6-12 kbar where the rocks underwent contractional deformation and metamorphism (~500-700°C). Tonalites and trondhjemites were changed to gneisses, and basites to epidote- and garnet amphibolites. These rocks underwent syntectonic migmatization through the mechanism of segregation/differentiation in the presence of fluids and incipient partial melting. Synmetamorphic shortening of the rock pile, which led to folding and heterogeneous development of shear zones with thrust kinematics, terminated with intrusions of K-granites at 2.0 Ga, being followed by some brittle-ductile deformation of unconstrained timing. The 2.0 Ga event may have been connected with the 2.1-1.8 Ga global amalgamation of the Paleoproterozoic supercontinent of Columbia. Later the future Rzeszotary terrane was detached from the Gondwana mainland, reassembled and eventually, in the Neoproterozoic, it became part of the foreland of the Cadomian Orogen in Central Europe.

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Neoarchean to Paleoproterozoic fragments in the Brunovistulia terrane, S Poland : a component of the Columbia Supercontinent?

Żelaźniewicz Andrzej Ryszard, Fanning C. Mark

Geological Quarterly

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2020

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Vol. 64, No. 1

120--129

EN

The composite terrane of Brunovistulia includes basement of the Upper Silesia Block, southern Poland. In its NE part, the basement is elevated by the Rzeszotary Horst. In the Rzeszotary 2 borehole (Rz2) drilled in the horst, partly migmatized amphibolites, felsic gneisses and granites occur. An Na-plagioclase-phengite-K-feldspar neosome contained zircons that yielded U-Pb SHRIMP ages ~2.75-2.6 Ga (cores and single grains) and ~2.0 Ga (rims and single grains). The older ages are interpreted as the time of origin of the igneous protolith of the migmatized amphibolites. The younger ages recorded metamorphism and migmatization that affected both the magmatic precursor of the amphibolites and accompanying felsic rocks during a contractional tectonic/orogenic event. Migmatization was greatly enhanced by an influx of alkali-bearing fluids which heralded intrusion of late-orogenic unfoliated K-granite in an extensional regime, terminating the 2.0 Ga event. It is proposed that the entire orogenic edifice, of which the Brunovistulian rocks drilled in Rz 2 are a small part, represents fragments of the Columbia Supercontinent that was assembled in the Paleoproterozoic and broken up in the Mesoproterozoic. In Ediacaran times, these fragments became eventually incorporated into the Cadomian orogen in the form of its foreland and contributed to the formation of the composite terrane of Brunovistulia. Such a scenario explains why the U-Pb zircon age spectra in the Rzeszotary terrain differ dramatically from those in the remainder of Brunovistulia, which is thought to be the Cadomian hinterland.

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Impreza na poziomie : to ma być tradycja

Waloszczyk A.

Surowce i Maszyny Budowlane

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2017

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nr 5

24--26

PL

W czwartek 7 września w Piławie Górnej odbyła się impreza branży kruszywowej "Na poziomie 308". W kopalni amfibolitu i migmatytu efektownie zaprezentowano sprzęt Volvo i Powerscreen. We wrześniu 2015 roku w kopalni w Piławie Górnej odbyło się spotkanie branży kruszywowej "Na poziomie 308".

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The Orlica–Śnieżnik Dome, the Sudetes, in 2002 and 12 years later

Żelaźniewicz A., Jastrzębski M., Redlińska-Marczyńska A., Szczepański J.

Geologia Sudetica

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2014

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Vol. 42

105--123

EN

During the 2002 meeting of Czech, Polish and Slovak tectonic community in Żelazno, the Sudetes, the Central European Tectonic Studies Group (CETeG) was established. 12 years ago, participants of the meeting made an excursion to the eastern part of the Orlica–Śnieżnik Dome (OSD), which was focused on a variety of gneisses with inserts of (U)HP eclogites and various enclaves. The 2014 meeting brought members of the CETeG to the OSD again and an accompanying field excursion was dedicated mainly to evolution of metasedimentary and metavolcanogenic rocks in the region. This paper is a short review of the results of the studies undertaken in the OSD by different research groups in the last 12 years. The review is set against a background of what we knew about the geology of the dome in 2002. A significant progress was made. P-T paths were determined for mica schists and marbles as well as for metarhyolites originated from the continental crust and metabasites derived from the mantle. New light was shed on the origin of various types gneisses in the OSD and their genetic and structural relationships. A plethora of isotopic studies helped to better constrain timing of igneous and metamorphic events in the Orlica–Śnieżnik complex. Ages clustered around 350–340 Ma are repeatedly obtained, yet scarcer older ages up to 390 Ma and their geological significance are open to debate. Tectonic evolution of the dome was revised and new geodynamic concepts were proposed. However the new data has created some new problems and some old problems are still to be resolved in the future.

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Statistical analysis of a bulk chemical composition of orthogneisses migmatites and metarhyolites from the Orlica-Snieżnik Dome, West Sudetes

Redlińska-Marczyńska A.

Geologia Sudetica

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2014

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Vol. 42

80--81

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Ocena gęstości właściwej iłów na podstawie strat przy prażeniu

Tankiewicz M., Stróżyk J.

Górnictwo Odkrywkowe

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2013

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R. 54, nr 1

33--36

PL

W artykule przedstawiono wyniki badań laboratoryjnych gęstości właściwej iłów z niewielką zawartością substancji organicznej. Badania wykonano dla wybranych 35 próbek iłów i iłów pylastych z Dolnego Śląska. Dla każdej próby wykonano oznaczenia gęstości właściwej oraz zawartości substancji organicznej metodą prażenia w 800°C. Do oznaczonych wartości strat przy prażeniu wprowadzono poprawkę ze względu na utratę wody związanej. Wyniki doświadczeń przedstawiono w postaci zależności gęstości właściwej od poprawionych strat przy prażeniu. Zestawiono je z równaniami Skemptona i Petleya, Okruszko oraz Marcinka i Spychalskiego. Zaproponowano uproszczony wzór zależności gęstości właściwej od wartości strat przy prażeniu dla iłów.

EN

The paper presents results of laboratory investigations of specific gravity of clay with low organic matter content. The investigation have been made on selected 35 samples of clay and silty clay from Lower Silesia. For every sample the specific gravity and ignition loss (by firing at 800°C) have been estimated. To loss in weight on ignition the correction for bound water have been used. The results of examination are presented as relation between the specific gravity and corrected ignition loss. They were compared with equations of Skempton and Petley, Okruszko and Marcinek and Spychalski. Finally, simplified formula for specific gravity for clays have been proposed.

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Nowe zastosowania migmatytów z Dolnego Śląska - wybrane właściwości

Marciniszyn T.

Górnictwo Odkrywkowe

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2013

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R. 54, nr 1

52--55

PL

Poszukiwanie nowych zastosowań materiałów skalnych wymaga zwrócenia szczególnej uwagi na badania podstawowe. Obecny opis właściwości surowców skalnych oparty jest głównie na pomiarach wytrzymałości, czy ścieralności. Nowe zastosowania wymagają także innego typu badań. W tej kwestii zaproponowano badania termiczne (przewodność cieplna, rozszerzalność termiczna, szybkość wnikania fali termicznej) wsparte badaniem nasiąkliwości wodnej. Badania zostały przeprowadzone w celu wskazania nowych praktycznych zastosowań migmatytu, który jest wykorzystywany głównie jako kruszywo (kamienie drogowe i budowlane). Otrzymane wyniki pomiarów wskazują, że migmatyt może być zastosowany jako materiał konstrukcyjny, gdyż charakteryzuje się dobrymi właściwościami termicznymi jak i wizualnymi. W badaniach wyznaczono wartość współczynnika przewodności cieplnej λM=3,73[W/Km], rozszerzalności termicznej αM=5,2*10-6[K-1] oraz nasiąkliwości wodnej, który nie przekracza 0,4%.

EN

The searching of the new applications of rock materials requires to pay careful attention on basic research. The current characterization of properties of the rock materials is mainly based on measurements of strength, and also abrasion. The new possibilities of applications involve to perform other types of research. In this subject, the study of thermal properties (thermal conductivity, thermal expansion, thermal wave penetration) were carried out, as well as the water absorption measurements. The studies were done in order to identify the new practical applications of migmatite, which is mainly used as aggregate (in road or building construction). The obtained results indicate that migmatite can be used as a construction material, because of its good thermal and visual properties. The studies determined the coefficient of thermal conductivity λM = 3.73 [W/Km] and thermal expansion αM = 5.2* 10-6 [K-1], and water absorption, which does not exceed 0.4%.

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Selected properties of amphibolites and migmatites from the G.A.M. Kluczowa Mine

Marciniszyn T., Sieradzki A.

AGH Journal of Mining and Geoengineering

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2012

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Vol. 36, no. 4

75-81

EN

In this paper we present the results of thermal conductivity, thermal expansion and water absorption measurements of the migmatite and amphibolites rocks. The studies are intended to classify migmatites and amphibolites in terms of their practical application. The results revealed that investigated materials can be used as a construction material with good thermal and visual properties.

PL

W artykule przedstawiono wyniki badań przewodności cieplnej, rozszerzalności termicznej, jak również nasiąkliwości wodnej migmatytu i amfibolitu. Przeprowadzone badania mają na celu sklasyfikowanie migmatytu i amfibolitu pod względem ich praktycznego zastosowania. Wyniki wykazały, że badane materiały skalane mogą być wykorzystane jako materiał konstrukcyjny charakteryzujący się dobrymi właściwościami termicznymi oraz wizualnymi.

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Gneisses in the Orlica-Śnieżnik Dome, West Sudetes : a single batholitic protolith or a more complex origin?

Redlińska-Marczyńska A., Żelaźniewicz A.

Acta Geologica Polonica

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2011

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Vol. 61, no. 3

307-339

EN

Detailed structural and petrographic studies confirmed the presence of two major units of ca. 515-480 Ma gneisses in the Orlica-Śnieżnik Dome (NE Bohemian Massif) and enabled the distinction of two formations which differ in their mineral composition (modal and chemical) and structural records. An intrusive contact between rocks of the two formations was observed. The Gierałtów Gneiss Formation is composed of rocks having at least two sets of folded metamorphic foliations, with relics of compositional banding and records of early shearing prior to migmatization and metablastesis which produced quartzofeldspathic segregations (D1-D2 events). Such aggregates, even if isometric and shared (D3) may, but must not be mistaken for original augens (porphyroclasts in the original granite). Modal contents of the feldspars differ widely (20-40% of plagioclase feldspar, 16-40% of alkali feldspar) as well as their composition (Ab[0-90], An[6-38]); the biotites can be either poor or enormously enriched in Al (0.26-1.07 Al[^VI]). Such heterogeneities are consistent with the inferred metamorphic transformations of originally diversified sedimentary-volcanogenic protoliths. in contrast, the Śnieżnik Gneiss Formation is composed of metagranites, dynamically metamorphosed into the augen gneisses. They possess only one set of mylonitic foliation and one rodding lineation, both developed during a regional shear event (D3). Nearly equal modes of feldspars and quartz, uniform composition of plagioclase feldspar (An6-23) and a rather stable amount of Al (0.3-08 AlVi) in the biotites are indicative of homogenization of a granitic protolith. Anatectic provenance of the gneisses is evidenced by enclaves. Felsic microgranular enclaves are chilled fragments of the parental intrusion, while xenoliths and surmicaceous enclaves are akin to rocks of the Gierałtów Formation, thus the latter or equivalent rocks formed a migmatic envelope of the Śnieżnik granite pluton.