As part of the ongoing tasks of the Polish Geological Survey, the second edition of the Detailed Geological Map of the Sudetes Mountains (SMGS) at a scale of 1 : 25,000 was initiated in 2019. Within this framework, the Walim sheet was completed, encompassing the area of the Włodarz Mountain Massif (MGW). This paper pres¬ents a new, detailed geological map of a selected portion of the Sowie Góry (Owl Mountains) Metamorphic Complex (MKS). Systematic geological mapping of the MKS began in the late 19th century, with Dathe ’s contributions to several sheets of the Geologische Karte von Preussen und benachbarten Bundesstaaten at a 1 : 25,000 scale. A review of past cartographic studies covering the MKS and MGW areas reveals considerable discrepancies in geological interpretations by various authors, including Dathe, Finckh, Grocholski, Żelaźniewicz, and Cymerman. These differences largely reflect the region s poor exposure conditions and the extreme lithological heterogeneity of the MKS. The new mapping results for the MGW area stand in contrast to those of Żelaźniewicz, particularly regarding the role of migmatitic processes. The revised inter¬pretation highlights the intensity and diversity of migmatization, which were previously understated. Moreover, the concept of sequential, large-scale folding structures proposed by Żelaźniewicz appears incompatible with earlier German and Polish mapping efforts (Dathe, Finckh, Grocholski, Kryza).
The second Polish edition of the Detailed Geological Map of the Sudetes (SMGS) at a scale of 1 : 25,000 was initiated with seven map sheets: Zagórze Śląskie, Walim, Pieszyce, Jugów, Ludwikowice Kłodzkie, Nowa Ruda, and Ostroszowice. These sheets cover the Sowie Góry Metamorphic Complex, a key geological unit in the Central Sudetes. This abstract summarizes the results presented in seven chapters, comparing the newly compiled maps of the second edition with older cartographic data. In the updated geological interpretation of the Zagórze Śląskie, Walim, Pieszyce, and Ostroszowice sheets, stromatitic migmatites are the dominant lithological variety, with nebulitic migmatites occurring less frequently. The latter are most prominent in the Jugów, Ludwikowice Kłodzkie, and Nowa Ruda sheets. Schlieren migmatites are particularly common in the Pieszyce, Ostroszowice, and Ludwikowice Kłodzkie areas, while homogenized migmatites occur notably in the Pieszyce and Walim sheets. Additional migmatite types were also identified. Other mapped lithologies include granitic gneisses, various gneisses (aplitic, leptitic, layered, mylonitic), along with mylonites, ultramylonites, and phyllonites. Several units remain unresolved in terms of cartographic classification. The map also documents mafic and ultramafic rocks, including gabbros, hyperites, serpentinites, and amphibolites, as well as several distinct types of vein rocks.
For the first time, at the beginning of the 2nd edition of the Detailed Geological Map of the Sudetes 1 : 25,000, new, extended geochronological studies using the U-Pb method on zircons by means of the modern SHRIMP device were planned. They were completed by chemical dating of monazites with the WDS Cameca Sx100 electron microprobe. As a result of age studies about 920 new U-Pb zircon analyses were obtained from 28 samples of the several important rock-types of the Góry Sowie Metamorphic Complex, which significantly expands the scope of radiometric age record in this area. Apart from age, other diagnostic parameters were also used, such as Th/U ratios in zircon. They allow better understanding of the extremely complicated tectonometamorphic evolution of the Góry Sowie Metamorphic Complex during the complex orogenic processes in the Paleozoic in the NE part of the Bohemian Massif.
Na obszarze Polski wyróżniono 48 basenów sedymentacyjnych obejmujących utwory od ediakaru po pliocen. Opierając się głównie na dostępnych opracowaniach publikowanych, w tym kartograficznych, określono granice basenów, stosując oprogramowanie ArcGIS, a także zestawiono krótkie opisy poszczególnych jednostek. W opisach zarysowano ich zasadnicze cechy: plan strukturalny, wiek wypełnienia osadowego i jego charakterystykę, powierzchnię wychodni, zasięg regionalny na tle elementów tektoniki i paleogeografii oraz genezę. Baseny zaliczono do czterech ogólnych kategorii regionalnych: epikontynentalne (24), włączone w górotwór (14), śródgórskie (4) i związane z terranami (6). Większość opisanych jednostek (32) należy do basenów wychodzących poza granice Polski. Powierzchnia wychodni basenów (w granicach kraju) mieści się w szerokim zakresie: od 11 km2 (basen zgorzelecki) do 284 761 km2 (mezozoiczny basen Niżu Polskiego), przy średnim obszarze 27 290 km2. Nieliczne baseny (w zależności od interpretacji podłoża: 9–15) są rozwinięte bezpośrednio na fundamencie krystalicznym, znaczna większość została nałożona na jednostki powstałe wcześniej, nierzadko w wyniku reaktywacji dawniejszych ram tektonicznych. Głównie na podstawie prac publikowanych przedstawiono zarys genezy poszczególnych basenów, a także wstępnie zaliczono je do ośmiu kategorii genetycznych: obrzeże pasywne, pasmo fałdowo-nasuwcze, basen: przedgórski, przedłukowy, pull-apart, śródkratoniczny, ryftowy i załukowy. Baseny poligenetyczne, o wieloetapowej historii rozwoju, zaliczono do kategorii odnoszącej się do etapu inicjacji basenu. Luki w rozpoznaniu niektórych opisanych basenów sprawiają, że w miarę dopływu nowych materiałów badawczych może ulec zmianie ich definicja, ewentualnie nastąpi ich wewnętrzny podział regionalny lub stratygraficzny, czy też połączenie z sąsiednimi jednostkami.
EN
The catalogue provides description of 48 sedimentary basins from the territory of Poland, comprising deposits from Ediacaran to Pliocene. Basin boundaries in the Arc GIS format, as well as short descriptions of particular units, have been based mainly on published data, including cartographic materials. Descriptions include essential characteristics such as: structural plan, age and general features of a sedimentary fill, regional extent against tectonic and paleogeographic boundaries, and brief genetic considerations. The basins were ascribed to four general regional categories: epicontinental (24 units), incorporated in an orogen (14), intramontane (4), and associated with allochthonous terranes (6). The basin area, defined here as the present area of outcrops or subcrops, ranges from 11 km2 (Zgorzelec Basin) to 284,761 km2 (Mesozoic Basin of the Polish Lowlands), with a mean of 27,290 km2. Most of the described units (32) extend beyond the Polish territory into surrounding countries. Some basins (depending on the basement interpretation: 9-15) are developed directly on a crystalline basement. Majority of basins onlap earlier units, commonly due to reactivation of the pre-existing tectonic framework. A brief review of mechanisms that led to basin formation allowed the authors to ascribe the units to eight genetic categories: passive margin, fold-and-thrust belt, foreland, fore-arc, pull-apart, intracratonic, rift, and back-arc basins. In several instances of polygenetic (polyhistory) basins they were included to a category corresponding to the initial stage of basin development. The present study pinpoints some gaps in our knowledge of particular basins. Once filled, they may lead to changes in basin concepts and definitions, and also to their further subdivision or, conversely, unification.
The specificity of the activities of the Lower Silesian Branch of the Polish Geological Institute - National Research Institute (PGI-NRI) is due to main factors: (1) mosaic-like geological structure of Lower Silesia, (2) the wealth of various mineral resources, (3) centuries-old mining traditions of the region. Initially, the researches included mainly geological cartography, subsequently expanding the scope of work to include regional (structural) geology and deposit geology. The contribution of applied geology, especially hydrogeology and environmental geology, has increased significantly in the previous decades. Three chapters present different periods of the Lower Silesian Branch of the PGI-NRI with its most important milestones for the Polish geology in the last seven decades. This division includes three periods: (1) years of development (1949-1989); (2) years of stagnation (1989-2013), and (3) years of disorganization (2014-2019). The period of intensification of geological researches carried out by the Lower Silesian Branch of the PGI-NRI lasted until the years of the so-called system transformation. During that period, the programs of deep boreholes were finished. In the 1990s, detailed cartographic works in Lower Silesia were completed. Acute shortage of new factographic material caused the necessity to analyze the archival material stored during previous decades at the Lower Silesian Branch. In 2014, it has practically decommissioned the regional branches, including the Lower Silesian Branch. Full centralization has led to the liquidation of both the branches’ independence and their previous focus on the implementation of tasks related to the specificity of a given region. In the forthcoming future, new challenges would depend on a proper organization chart of the PGI-NRI and the position of the regional branches in this scheme.
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