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    Wyświetlanie 1-4 z 4
    Tytuł:
    Meteoryty, kratery uderzeniowe i inne ślady kosmicznej katastrofy w rejonie Moraska pod Poznaniem
    Meteorites, impact craters, and other traces of a cosmic disaster at Morasko near Poznań
    Autorzy:
    Szczuciński, Witold
    Muszyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2076071.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    krater uderzeniowy
    meteoryt
    depozyty wyrzucane
    Holocen
    Polska
    impact crater
    meteorite
    ejecta deposits
    Holocene
    Polska
    Opis:
    About 5,000 years ago near Morasko (the district of the present-day city of Poznań, western Poland) the largest known iron meteorite shower in Central Europe took place. The evidence of that impact, documented so far, comprises numerous iron meteorite fragments distributed over an area of approximately 3 km2 and at least six meteorite impact craters with a maximum diameter of about 100 m. The present paper reviews the most recent findings related to the meteorite, craters, processes of their formation, as well as the environmental effects of the impact in the Morasko area. The most important findings, reported in this review cover: 1) the recognition of two new minerals in the meteorite: moraskoite and czochralskiite; 2) the identification and detailed analysis of the ejecta layer around the craters and underlying paleosoil providing evidence for the mid-Holocene age of the impact; 3) the numerical modelling constraining the range of likely physical properties of the impactor, e.g. the diameter of the projectile forming the largest crater and its landing velocity (c. 1.5 m and 10km/s, respectively);4) the studies of the nearby lake and peat deposits revealing restricted environmental effects of the impact. The Morasko craters field is currently one of the best-studied examples of small/moderate-sized meteorite impact in unconsolidated sediments.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 8; 637--644
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stanisław Lorenc (1943–2020) : geolog, rektor, podróżnik
    Stanisław Lorenc (1943–2020) : geologist, rector, voyager
    Autorzy:
    Biernacka, Julia
    Muszyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2076073.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    historia geologii
    skały węglanowe
    geologia morska
    Uniwersytet Wrocławski
    Uniwersytet w Poznaniu
    Polska
    history of geology
    carbonate rocks
    marine geology
    University of Wroclaw
    University in Poznań
    Polska
    Opis:
    Professor Stanislaw Lorenc (1943-2020) was a distinguished Polish geologist and Rector (President) of Adam Mickiewicz University in Poznań (2002-2008). He graduated from the University of Wroclaw, where he obtained MSc and PhD degrees, and completed his Habilitation thesis. Stanislaw Lorenc studied sedimentary rocks, primarily carbonates. He examined Upper Permian (Zechstein) carbonate and sulphate rocks of western Poland, and Cambrian metacarbonates of the Kaczawa Mountains. In 1988, Stanislaw Lorenc moved to Poznań, where, after the reactivation of geological studies at the University, he co-organized the Institute of Geology. He participated in many scientific marine cruises in the southern Pacific and the South China Sea, and taught marine geology at the University of Poznań. He was also engaged in the studies on geohazards and promoted research on tsunami sediments. Stanislaw Lorenc was an advocate of Polish-German scientific cooperation.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 8; 628--635
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dokumentacja znalezisk meteorytu Morasko w latach 2011–2014 : problemy metodyczne i uzyskane efekty
    Documenting the Morasko meteorite finds in 2011-2014 : methodical problems and results obtained
    Autorzy:
    Nowak, Monika
    Muszyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2076020.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    meteoryt Morasko
    znaleziska meteorytów
    dokumentacja meteorytów
    pole zasypane
    Morasko meteorite
    meteorite findings
    meteorite documentation
    strewn field
    Opis:
    The Morasko meteorite is currently one of the biggest tourist attractions of the city of Poznań. In this paper we present the stages of creating documentation for finds of individual fragments of the Morasko meteorite, conducted at the Institute of Geology, Adam Mickiewicz University, in 2011-2014. During the initial period of documentary work, the focus was mainly on the compilation of topographic maps prepared by various authors to create one collective map of finds. ESRI (ArcGIS) software was used to prepare the documentation. The main problem at the initial stage of documentation was the coordination of source data prepared on topographic bases developed in various reference systems (PUWG 65, PUWG 92, tourist map without any system). During the years 2012-2014, topographic data were successively supplemented with new finds, resulting in a database comprising a total of 1413 items - containing coordinates, data on individual finders, masses (given as a range or as specific data in grams), depths at which meteorites rested, and, in some cases, special features (so-called shrapnel). The obtained documentation is a unique source of data on most of the fragments of the Morasko meteorite. It remains debatable whether the collected information is sufficient to calculate a reliable meteorite strewn field.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 12; 879--885
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metod instrumentalnych w badaniach meteorytu Morasko
    Application of instrumental methods in the Morasko Meteorite investigations
    Autorzy:
    Muszyński, Andrzej
    Runka, Tomasz
    Gołębiewska, Bożena
    Michalska, Danuta
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2075978.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    meteoryt Morasko
    mineralogia
    metody mikroskopowe
    SEM-EDS
    metoda mikrochemiczna
    WDS
    mikroskopia Ramana
    Meteorite Morasko
    mineralogy
    Raman spectroscopy
    Opis:
    Since its discovery, the Morasko meteorite has been the subject of many studies. Among the publications summarising the mineralogical and geochemical characteristics of the Morasko meteorite, two monographs are worth mentioning by: Dominik (1976) and Muszyński et al. (2012), in which the essentialfeatures of the Morasko meteorite were presented. Since the first piece of the Morasko meteorite was to be explored, the analysis of mineral composition has been conducted with more and more specialised and sophisticated instrumental methods. As it is well known, the Morasko meteorite is classified into the group of iron meteorites IAB MG, and consists mainly of the crystalline Fe-Ni alloy in the form of two minerals: kamacite and taenite, accompanied by tetrataenite. A commonly found structure of the mineral composition of the Morasko meteorite, as regards other iron meteorites, are graphite-troilite nodules, which contain silicate and phosphate minerals. This paper presents a review ofresearch on the mineralogy and geochemistry of the Morasko meteorite, where a number of instrumental tests have been used, from microscopic observations to microchemical semiquantitative analyses using scanning electron microscopy (SEM-EDS), microchemical quantitative analyses using an electron microprobe (WDS), to the structural methods applying Raman spectroscopy. The results of microscopic, microchemical and microstructural investigations, which have included the outer layer of the meteorite known as a fusion crust, have been presented against the petrographic composition of the meteorite. Besides, the type of sediment attached to the outer meteorite layer was examined. The research, conducted on two dozen meteorite fragments, allowed distinguishing two different zones concerning mineralogy and geochemistry, and to determine microstructural changes within them, most probably created in the processes related to the moment of the meteorite impact.
    Źródło:
    Przegląd Geologiczny; 2019, 67; 156--158
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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